Default parameter value

Mostly, this tries to move common logic up to the DiscussionPage as the
lowest common ancestor of these components sharing certain state.

It's still messy, though. :-/

.github/FUNDING.yml

@@ -0,0 +1,3 @@
+github: flarum
+open_collective: flarum
+tidelift: packagist/flarum/core

.github/stale.yml

@@ -0,0 +1,26 @@
+daysUntilStale: 90
+daysUntilClose: 30
+
+staleLabel: stale
+
+exemptLabels:
+- org/keep
+- type/bug
+- type/regression
+- critical
+- security
+exemptAssignees: true
+exemptMilestones: true
+exemptProjects: true
+
+markComment: >
+  This issue has been automatically marked as stale because it has not had
+  recent activity. It will be closed if no further activity occurs. We do this
+  to keep the amount of open issues to a manageable minimum.
+
+  In any case, thanks for taking an interest in this software and contributing
+  by opening the issue in the first place!
+
+closeComment: >
+  We are closing this issue as it seems to have grown stale. If you still
+  encounter this problem with the latest version, feel free to re-open it.

.github/workflows/lint.yml

@@ -0,0 +1,31 @@
+name: Lint
+
+on:
+  push:
+    paths:
+      - 'js/src/**'
+  pull_request:
+    paths:
+      - 'js/src/**'
+
+jobs:
+  prettier:
+    runs-on: ubuntu-latest
+
+    name: JS / Prettier
+
+    steps:
+      - uses: actions/checkout@master
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v1
+        with:
+          node-version: "12"
+
+      - name: Install JS dependencies
+        run: npm ci
+        working-directory: ./js
+
+      - name: Check JS code for formatting
+        run: node_modules/.bin/prettier --check src
+        working-directory: ./js

.github/workflows/test.yml

@@ -8,7 +8,7 @@ jobs:
 
     strategy:
       matrix:
-        php: [7.1, 7.2, 7.3]
+        php: [7.2, 7.3, 7.4]
         service: ['mysql:5.7', mariadb]
         prefix: ['', flarum_]
 
@@ -21,16 +21,16 @@ jobs:
             prefixStr: (prefix)
 
         exclude:
-          - php: 7.1
+          - php: 7.2
             service: 'mysql:5.7'
             prefix: flarum_
-          - php: 7.1
+          - php: 7.2
             service: mariadb
             prefix: flarum_
-          - php: 7.2
+          - php: 7.3
             service: 'mysql:5.7'
             prefix: flarum_
-          - php: 7.2
+          - php: 7.3
             service: mariadb
             prefix: flarum_
 
@@ -43,30 +43,17 @@ jobs:
     name: 'PHP ${{ matrix.php }} / ${{ matrix.db }} ${{ matrix.prefixStr }}'
 
     steps:
-      - name: Checkout repository
-        uses: actions/checkout@v1
-
-      - name: Get Composer Cache Directory
-        id: composer-cache
-        run: |
-          echo "::set-output name=dir::$(composer config cache-files-dir)"
-
-      - uses: actions/cache@v1
-        id: cache
-        with:
-          path: ${{ steps.composer-cache.outputs.dir }}
-          key: ${{ runner.os }}-composer-${{ hashFiles('**/composer.json') }}
-          restore-keys: |
-            ${{ runner.os }}-composer-
+      - uses: actions/checkout@master
 
       - name: Select PHP version
         run: sudo update-alternatives --set php $(which php${{ matrix.php }})
 
       - name: Create MySQL Database
-        run: mysql -uroot -proot -e 'CREATE DATABASE flarum_test;' --port 13306
+        run: |
+          sudo systemctl start mysql
+          mysql -uroot -proot -e 'CREATE DATABASE flarum_test;' --port 13306
 
       - name: Install Composer dependencies
-        if: steps.cache.outputs.cache-hit != 'true'
         run: composer install
 
       - name: Setup Composer tests

CHANGELOG.md

@@ -1,5 +1,115 @@
 # Changelog
 
+## [0.1.0-beta.13](https://github.com/flarum/core/compare/v0.1.0-beta.12...v0.1.0-beta.13)
+
+### Added
+- Console extender (#2057)
+- CSRF extender (#2095)
+- Event extender (#2097)
+- Mail extender (#2012)
+- Model extender (#2100)
+- Posts by users that started a discussion now have the CSS class `.Post--by-start-user`
+- PHPUnit 8 compatibility
+- Composer 2 compatibility
+- Permission groups can now be hidden (#2129)
+- Confirmation popup when hiding or deleting posts (#2135)
+
+### Changed
+- Updated less.php dependency version to 3.0
+- Updated JS dependencies
+- All notifications and other emails now processed through the queue, if enabled (#978, #1928, #1931, #2096)
+- Simplified uploads, removing need to store intermediate files (#2117)
+- Improved date handling for dates older than 1 year (#2034)
+- Linting and automatic formatting for JS (#2099)
+- Translation files from Language Packs are only loaded for extensions that are enabled (#2020)
+- PHP extenders' properties are now `private` instead of `protected`, intentionally making it harder to extend these classes (#1958)
+- Preparation for upgrading Laravel components to 5.8 and then 6.0 (#2055, #2117)
+- Allowed permission checks based on model classes in addition to instances (#1977)
+
+### Fixed
+- Users can no longer restore discussions hidden by admins (#2037)
+- Issues of the Modal not showing or auto hiding (#1504, #1813, #2080)
+- Columnar layout on admin extensions page was broken in Firefox (#2029, #2111)
+- Non-dismissible modals could still be dismissed using the ESC key (#1917)
+- New discussions were added to the discussion list above unread sticky posts (#1751, #1868)
+- New discussions not visible to users when using Pusher (#2076, #2077)
+- Permission icons were aligned unevenly in admin permissions list (#2016, #2018)
+- Notification bubble not inversed on mobile with colored header (#1983, #2109)
+- Post stream scrubber clicks jumped back to first post (#1945)
+- Loading state of Switch toggle component was hard to see (#2039, #1491)
+- `Flarum\Extend\Middleware`: The methods `insertBefore()` and `insertAfter()` did not work as described (#2063, #2084)
+
+### Removed
+- Support for PHP 7.1 (#2014)
+- Zend compatibility bridge (#2010)
+- SES mail support (#2011)
+- Backward compatibility layer for `Flarum\Mail\DriverInterface`, new methods from beta.12 are now required
+- `Flarum\Util\Str` helper class
+- `Flarum\Event\ConfigureMiddleware` event 
+
+### Deprecated
+- `Flarum\Event\AbstractConfigureRoutes` event class
+- `Flarum\Event\ConfigureApiRoutes` event class
+- `Flarum\Event\ConfigureForumRoutes` event class
+- `Flarum\Event\ConfigureLocales` event class
+
+## [0.1.0-beta.12](https://github.com/flarum/core/compare/v0.1.0-beta.11.1...v0.1.0-beta.12)
+
+### Added
+- Full support for PHP 7.4 (#1980)
+- Mail settings: Configure region for the Mailgun driver (#1834, #1850)
+- Mail settings: Alert admins about incomplete settings (#1763, #1921)
+- New permission that allows users to post without throttling (#1255, #1938)
+- Basic transliteration of discussion "slugs" / pretty URLs (#194, #1975)
+- User profiles: Render basic content on server side (#1901)
+- New extender for configuring middleware (#1919, #1952, #1957, #1971)
+- New extender for configuring error handling (#1781, #1970)
+- Automated tests for PHP extenders to guarantee their backwards compatibility
+
+### Changed
+- Profile URLs for non-existing users properly return HTTP 404 (#1846, #1901)
+- Confirmation email subject no longer contains the forum title (#1613)
+- Improved error handling during Flarum's early boot phase (#1607)
+- Updated deprecated "Zend" libraries to their new "Laminas" equivalents (#1963)
+
+### Fixed
+- Update page did not work when installed in subdirectories (#1947)
+- Avatar upload did not work in IE11 / Edge (#1125, #1570)
+- Translation fallback was ignored for client-rendered pages (#1774, #1961)
+- The success alert when posting replies was invisible (#1976)
+
+## [0.1.0-beta.11.1](https://github.com/flarum/core/compare/v0.1.0-beta.11...v0.1.0-beta.11.1)
+
+### Fixed
+- Saving custom css in admin failed (#1946)
+
+## [0.1.0-beta.11](https://github.com/flarum/core/compare/v0.1.0-beta.10...v0.1.0-beta.11)
+
+### Added
+- Comments have an additional class `Post--by-actor` when posted by the user (#1927)
+
+### Changed
+- Improved support for URL identification during installation (#1861)
+- KeyboardNavigatable now has a callback ability (#1922)
+- Links are no longer opened with target `_blank` but in the same window (#859)
+- Links now have `nofollow ugc` by default as their `rel` attribute (#859, #1884)
+- Improved performance of the full text gambit when searching for users (#1877)
+- The Queue implementation is now available under its Illuminate contract
+
+### Fixed
+- No error handling was possible in the console/cli (#1789)
+- Enable scrollbars in log in modals so it fits for GitHub (#1716)
+- Reduce log in modal for SSO so it fits for Facebook (#1727)
+- Deleting discussions permanently did not delete its posts (#1909)
+- Fixed the queue:restart command (#1932)
+- Deleted posts were visible to all visitors (#1827)
+- Old avatars weren't being deleted when replaced (#1918)
+- The search performance regression was reverted (#1764)
+- No profile background could be set for remote images (#445)
+- Back button sends to home even though it could actually go back (#1942)
+- Debug button no longer visible (#1687)
+- Modals on smaller screens use the whole width of the page
+
 ## [0.1.0-beta.10](https://github.com/flarum/core/compare/v0.1.0-beta.9...v0.1.0-beta.10)
 
 ### Added

LICENSE

@@ -1,6 +1,7 @@
 The MIT License (MIT)
 
-Copyright (c) Toby Zerner
+Copyright (c) 2019-2020 Stichting Flarum (Flarum Foundation)
+Copyright (c) 2014-2019 Toby Zerner (toby.zerner@gmail.com)
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

README.md

@@ -27,7 +27,7 @@ Thank you for considering contributing to Flarum! Please read the **[Contributin
 
 ## Security Vulnerabilities
 
-If you discover a security vulnerability within Flarum, please send an e-mail to [security@flarum.org](mailto:security@flarum.org). All security vulnerabilities will be promptly addressed.
+If you discover a security vulnerability within Flarum, please send an e-mail to [security@flarum.org](mailto:security@flarum.org). All security vulnerabilities will be promptly addressed. More details can be found in our [security policy](https://github.com/flarum/core/security/policy).
 
 ## License
 

composer.json

@@ -5,17 +5,28 @@
     "homepage": "https://flarum.org/",
     "license": "MIT",
     "authors": [
-        {
-            "name": "Toby Zerner",
-            "email": "toby.zerner@gmail.com"
-        },
         {
             "name": "Franz Liedke",
             "email": "franz@develophp.org"
         },
         {
-          "name": "Daniel Klabbers",
-          "email": "daniel@klabbers.email"
+            "name": "Daniel Klabbers",
+            "email": "daniel@klabbers.email",
+            "homepage": "https://luceos.com"
+        },
+        {
+            "name": "David Sevilla Martin",
+            "email": "me+flarum@datitisev.me",
+            "homepage": "https://datitisev.me"
+        },
+        {
+            "name": "Clark Winkelmann",
+            "email": "clark.winkelmann@gmail.com",
+            "homepage": "https://clarkwinkelmann.com"
+        },
+        {
+            "name": "Matthew Kilgore",
+            "email": "matthew@kilgore.dev"
         }
     ],
     "support": {
@@ -24,49 +35,50 @@
         "docs": "https://flarum.org/docs/"
     },
     "require": {
-        "php": ">=7.1",
+        "php": ">=7.2",
         "axy/sourcemap": "^0.1.4",
         "components/font-awesome": "5.9.*",
-        "dflydev/fig-cookies": "^1.0.2",
+        "dflydev/fig-cookies": "^2.0.1",
         "doctrine/dbal": "^2.7",
         "franzl/whoops-middleware": "^0.4.0",
-        "illuminate/bus": "5.7.*",
-        "illuminate/cache": "5.7.*",
-        "illuminate/config": "5.7.*",
-        "illuminate/container": "5.7.*",
-        "illuminate/contracts": "5.7.*",
-        "illuminate/database": "5.7.*",
-        "illuminate/events": "5.7.*",
-        "illuminate/filesystem": "5.7.*",
-        "illuminate/hashing": "5.7.*",
-        "illuminate/mail": "5.7.*",
-        "illuminate/queue": "5.7.*",
-        "illuminate/session": "5.7.*",
-        "illuminate/support": "5.7.*",
-        "illuminate/validation": "5.7.*",
-        "illuminate/view": "5.7.*",
-        "intervention/image": "^2.3.0",
+        "illuminate/bus": "^6.0",
+        "illuminate/cache": "^6.0",
+        "illuminate/config": "^6.0",
+        "illuminate/container": "^6.0",
+        "illuminate/contracts": "^6.0",
+        "illuminate/database": "^6.0",
+        "illuminate/events": "^6.0",
+        "illuminate/filesystem": "^6.0",
+        "illuminate/hashing": "^6.0",
+        "illuminate/mail": "^6.0",
+        "illuminate/queue": "^6.0",
+        "illuminate/session": "^6.0",
+        "illuminate/support": "^6.0",
+        "illuminate/validation": "^6.0",
+        "illuminate/view": "^6.0",
+        "intervention/image": "^2.5.0",
+        "laminas/laminas-diactoros": "^1.8.4",
+        "laminas/laminas-httphandlerrunner": "^1.0",
+        "laminas/laminas-stratigility": "^3.0",
         "league/flysystem": "^1.0.11",
         "matthiasmullie/minify": "^1.3",
         "middlewares/base-path": "^1.1",
         "middlewares/base-path-router": "^0.2.1",
         "middlewares/request-handler": "^1.2",
         "monolog/monolog": "^1.16.0",
+        "nesbot/carbon": "^2.0",
         "nikic/fast-route": "^0.6",
-        "oyejorge/less.php": "^1.7",
         "psr/http-message": "^1.0",
         "psr/http-server-handler": "^1.0",
         "psr/http-server-middleware": "^1.0",
-        "s9e/text-formatter": "^1.2.0",
+        "s9e/text-formatter": "^2.3.6",
         "symfony/config": "^3.3",
         "symfony/console": "^4.2",
         "symfony/event-dispatcher": "^4.3.2",
         "symfony/translation": "^3.3",
         "symfony/yaml": "^3.3",
         "tobscure/json-api": "^0.3.0",
-        "zendframework/zend-diactoros": "^1.8.4",
-        "zendframework/zend-httphandlerrunner": "^1.0",
-        "zendframework/zend-stratigility": "^3.0"
+        "wikimedia/less.php": "^3.0"
     },
     "require-dev": {
         "mockery/mockery": "^1.0",

js/.prettierrc.json

@@ -0,0 +1,6 @@
+{
+  "printWidth": 150,
+  "singleQuote": true,
+  "tabWidth": 2,
+  "trailingComma": "es5"
+}

js/package.json

@@ -2,9 +2,11 @@
   "private": true,
   "name": "@flarum/core",
   "dependencies": {
+    "@babel/preset-typescript": "^7.10.1",
     "bootstrap": "^3.4.1",
     "classnames": "^2.2.5",
     "color-thief-browser": "^2.0.2",
+    "dayjs": "^1.8.28",
     "expose-loader": "^0.7.5",
     "flarum-webpack-config": "0.1.0-beta.10",
     "jquery": "^3.4.1",
@@ -12,15 +14,25 @@
     "lodash-es": "^4.17.14",
     "m.attrs.bidi": "github:tobscure/m.attrs.bidi",
     "mithril": "^0.2.8",
-    "moment": "^2.22.2",
     "punycode": "^2.1.1",
     "spin.js": "^3.1.0",
-    "webpack": "^4.26.0",
-    "webpack-cli": "^3.1.2",
+    "webpack": "^4.43.0",
+    "webpack-cli": "^3.3.11",
     "webpack-merge": "^4.1.4"
   },
+  "devDependencies": {
+    "husky": "^4.2.5",
+    "prettier": "2.0.2"
+  },
   "scripts": {
     "dev": "webpack --mode development --watch",
-    "build": "webpack --mode production"
+    "build": "webpack --mode production",
+    "format": "prettier --write src",
+    "format-check": "prettier --check src"
+  },
+  "husky": {
+    "hooks": {
+      "pre-commit": "npm run format"
+    }
   }
 }

js/src/admin/AdminApplication.js

@@ -12,9 +12,9 @@ export default class AdminApplication extends Application {
     canGoBack: () => true,
     getPrevious: () => {},
     backUrl: () => this.forum.attribute('baseUrl'),
-    back: function() {
+    back: function () {
       window.location = this.backUrl();
-    }
+    },
   };
 
   constructor() {
@@ -27,7 +27,7 @@ export default class AdminApplication extends Application {
    * @inheritdoc
    */
   mount() {
-    m.mount(document.getElementById('app-navigation'), Navigation.component({className: 'App-backControl', drawer: true}));
+    m.mount(document.getElementById('app-navigation'), Navigation.component({ className: 'App-backControl', drawer: true }));
     m.mount(document.getElementById('header-navigation'), Navigation.component());
     m.mount(document.getElementById('header-primary'), HeaderPrimary.component());
     m.mount(document.getElementById('header-secondary'), HeaderSecondary.component());
@@ -59,5 +59,5 @@ export default class AdminApplication extends Application {
     }
 
     return required;
-  };
+  }
 }

js/src/admin/compat.js

@@ -6,7 +6,6 @@ import EditCustomFooterModal from './components/EditCustomFooterModal';
 import SessionDropdown from './components/SessionDropdown';
 import HeaderPrimary from './components/HeaderPrimary';
 import AppearancePage from './components/AppearancePage';
-import Page from './components/Page';
 import StatusWidget from './components/StatusWidget';
 import HeaderSecondary from './components/HeaderSecondary';
 import SettingsModal from './components/SettingsModal';
@@ -15,7 +14,6 @@ import AddExtensionModal from './components/AddExtensionModal';
 import ExtensionsPage from './components/ExtensionsPage';
 import AdminLinkButton from './components/AdminLinkButton';
 import PermissionGrid from './components/PermissionGrid';
-import Widget from './components/Widget';
 import MailPage from './components/MailPage';
 import UploadImageButton from './components/UploadImageButton';
 import LoadingModal from './components/LoadingModal';
@@ -37,7 +35,6 @@ export default Object.assign(compat, {
   'components/SessionDropdown': SessionDropdown,
   'components/HeaderPrimary': HeaderPrimary,
   'components/AppearancePage': AppearancePage,
-  'components/Page': Page,
   'components/StatusWidget': StatusWidget,
   'components/HeaderSecondary': HeaderSecondary,
   'components/SettingsModal': SettingsModal,
@@ -46,7 +43,6 @@ export default Object.assign(compat, {
   'components/ExtensionsPage': ExtensionsPage,
   'components/AdminLinkButton': AdminLinkButton,
   'components/PermissionGrid': PermissionGrid,
-  'components/Widget': Widget,
   'components/MailPage': MailPage,
   'components/UploadImageButton': UploadImageButton,
   'components/LoadingModal': LoadingModal,
@@ -58,6 +54,6 @@ export default Object.assign(compat, {
   'components/AdminNav': AdminNav,
   'components/EditCustomCssModal': EditCustomCssModal,
   'components/EditGroupModal': EditGroupModal,
-  'routes': routes,
-  'AdminApplication': AdminApplication
+  routes: routes,
+  AdminApplication: AdminApplication,
 });

js/src/admin/components/AddExtensionModal.js

@@ -22,8 +22,10 @@ export default class AddExtensionModal extends Modal {
     return (
       <div className="Modal-body">
         <p>{app.translator.trans('core.admin.add_extension.temporary_text')}</p>
-        <p>{app.translator.trans('core.admin.add_extension.install_text', {a: <a href="https://discuss.flarum.org/t/extensions" target="_blank"/>})}</p>
-        <p>{app.translator.trans('core.admin.add_extension.developer_text', {a: <a href="http://flarum.org/docs/extend" target="_blank"/>})}</p>
+        <p>
+          {app.translator.trans('core.admin.add_extension.install_text', { a: <a href="https://discuss.flarum.org/t/extensions" target="_blank" /> })}
+        </p>
+        <p>{app.translator.trans('core.admin.add_extension.developer_text', { a: <a href="http://flarum.org/docs/extend" target="_blank" /> })}</p>
       </div>
     );
   }

js/src/admin/components/AdminLinkButton.js

@@ -13,11 +13,7 @@ export default class AdminLinkButton extends LinkButton {
   getButtonContent() {
     const content = super.getButtonContent();
 
-    content.push(
-      <div className="AdminLinkButton-description">
-        {this.props.description}
-      </div>
-    );
+    content.push(<div className="AdminLinkButton-description">{this.props.description}</div>);
 
     return content;
   }

js/src/admin/components/AdminNav.js

@@ -15,9 +15,7 @@ import ItemList from '../../common/utils/ItemList';
 export default class AdminNav extends Component {
   view() {
     return (
-      <SelectDropdown
-        className="AdminNav App-titleControl"
-        buttonClassName="Button">
+      <SelectDropdown className="AdminNav App-titleControl" buttonClassName="Button">
         {this.items().toArray()}
       </SelectDropdown>
     );
@@ -31,47 +29,65 @@ export default class AdminNav extends Component {
   items() {
     const items = new ItemList();
 
-    items.add('dashboard', AdminLinkButton.component({
-      href: app.route('dashboard'),
-      icon: 'far fa-chart-bar',
-      children: app.translator.trans('core.admin.nav.dashboard_button'),
-      description: app.translator.trans('core.admin.nav.dashboard_text')
-    }));
+    items.add(
+      'dashboard',
+      AdminLinkButton.component({
+        href: app.route('dashboard'),
+        icon: 'far fa-chart-bar',
+        children: app.translator.trans('core.admin.nav.dashboard_button'),
+        description: app.translator.trans('core.admin.nav.dashboard_text'),
+      })
+    );
 
-    items.add('basics', AdminLinkButton.component({
-      href: app.route('basics'),
-      icon: 'fas fa-pencil-alt',
-      children: app.translator.trans('core.admin.nav.basics_button'),
-      description: app.translator.trans('core.admin.nav.basics_text')
-    }));
+    items.add(
+      'basics',
+      AdminLinkButton.component({
+        href: app.route('basics'),
+        icon: 'fas fa-pencil-alt',
+        children: app.translator.trans('core.admin.nav.basics_button'),
+        description: app.translator.trans('core.admin.nav.basics_text'),
+      })
+    );
 
-    items.add('mail', AdminLinkButton.component({
-      href: app.route('mail'),
-      icon: 'fas fa-envelope',
-      children: app.translator.trans('core.admin.nav.email_button'),
-      description: app.translator.trans('core.admin.nav.email_text')
-    }));
+    items.add(
+      'mail',
+      AdminLinkButton.component({
+        href: app.route('mail'),
+        icon: 'fas fa-envelope',
+        children: app.translator.trans('core.admin.nav.email_button'),
+        description: app.translator.trans('core.admin.nav.email_text'),
+      })
+    );
 
-    items.add('permissions', AdminLinkButton.component({
-      href: app.route('permissions'),
-      icon: 'fas fa-key',
-      children: app.translator.trans('core.admin.nav.permissions_button'),
-      description: app.translator.trans('core.admin.nav.permissions_text')
-    }));
+    items.add(
+      'permissions',
+      AdminLinkButton.component({
+        href: app.route('permissions'),
+        icon: 'fas fa-key',
+        children: app.translator.trans('core.admin.nav.permissions_button'),
+        description: app.translator.trans('core.admin.nav.permissions_text'),
+      })
+    );
 
-    items.add('appearance', AdminLinkButton.component({
-      href: app.route('appearance'),
-      icon: 'fas fa-paint-brush',
-      children: app.translator.trans('core.admin.nav.appearance_button'),
-      description: app.translator.trans('core.admin.nav.appearance_text')
-    }));
+    items.add(
+      'appearance',
+      AdminLinkButton.component({
+        href: app.route('appearance'),
+        icon: 'fas fa-paint-brush',
+        children: app.translator.trans('core.admin.nav.appearance_button'),
+        description: app.translator.trans('core.admin.nav.appearance_text'),
+      })
+    );
 
-    items.add('extensions', AdminLinkButton.component({
-      href: app.route('extensions'),
-      icon: 'fas fa-puzzle-piece',
-      children: app.translator.trans('core.admin.nav.extensions_button'),
-      description: app.translator.trans('core.admin.nav.extensions_text')
-    }));
+    items.add(
+      'extensions',
+      AdminLinkButton.component({
+        href: app.route('extensions'),
+        icon: 'fas fa-puzzle-piece',
+        children: app.translator.trans('core.admin.nav.extensions_button'),
+        description: app.translator.trans('core.admin.nav.extensions_text'),
+      })
+    );
 
     return items;
   }

js/src/admin/components/AppearancePage.js

@@ -1,4 +1,4 @@
-import Page from './Page';
+import Page from '../../common/components/Page';
 import Button from '../../common/components/Button';
 import Switch from '../../common/components/Switch';
 import EditCustomCssModal from './EditCustomCssModal';
@@ -13,8 +13,8 @@ export default class AppearancePage extends Page {
 
     this.primaryColor = m.prop(app.data.settings.theme_primary_color);
     this.secondaryColor = m.prop(app.data.settings.theme_secondary_color);
-    this.darkMode = m.prop(app.data.settings.theme_dark_mode === '1');
-    this.coloredHeader = m.prop(app.data.settings.theme_colored_header === '1');
+    this.darkMode = m.prop(app.data.settings.theme_dark_mode);
+    this.coloredHeader = m.prop(app.data.settings.theme_colored_header);
   }
 
   view() {
@@ -24,85 +24,85 @@ export default class AppearancePage extends Page {
           <form onsubmit={this.onsubmit.bind(this)}>
             <fieldset className="AppearancePage-colors">
               <legend>{app.translator.trans('core.admin.appearance.colors_heading')}</legend>
-              <div className="helpText">
-                {app.translator.trans('core.admin.appearance.colors_text')}
-              </div>
+              <div className="helpText">{app.translator.trans('core.admin.appearance.colors_text')}</div>
 
               <div className="AppearancePage-colors-input">
-                <input className="FormControl" type="text" placeholder="#aaaaaa" value={this.primaryColor()} onchange={m.withAttr('value', this.primaryColor)}/>
-                <input className="FormControl" type="text" placeholder="#aaaaaa" value={this.secondaryColor()} onchange={m.withAttr('value', this.secondaryColor)}/>
+                <input
+                  className="FormControl"
+                  type="text"
+                  placeholder="#aaaaaa"
+                  value={this.primaryColor()}
+                  onchange={m.withAttr('value', this.primaryColor)}
+                />
+                <input
+                  className="FormControl"
+                  type="text"
+                  placeholder="#aaaaaa"
+                  value={this.secondaryColor()}
+                  onchange={m.withAttr('value', this.secondaryColor)}
+                />
               </div>
 
               {Switch.component({
                 state: this.darkMode(),
                 children: app.translator.trans('core.admin.appearance.dark_mode_label'),
-                onchange: this.darkMode
+                onchange: this.darkMode,
               })}
 
               {Switch.component({
                 state: this.coloredHeader(),
                 children: app.translator.trans('core.admin.appearance.colored_header_label'),
-                onchange: this.coloredHeader
+                onchange: this.coloredHeader,
               })}
 
               {Button.component({
                 className: 'Button Button--primary',
                 type: 'submit',
                 children: app.translator.trans('core.admin.appearance.submit_button'),
-                loading: this.loading
+                loading: this.loading,
               })}
             </fieldset>
           </form>
 
           <fieldset>
             <legend>{app.translator.trans('core.admin.appearance.logo_heading')}</legend>
-            <div className="helpText">
-              {app.translator.trans('core.admin.appearance.logo_text')}
-            </div>
-            <UploadImageButton name="logo"/>
+            <div className="helpText">{app.translator.trans('core.admin.appearance.logo_text')}</div>
+            <UploadImageButton name="logo" />
           </fieldset>
 
           <fieldset>
             <legend>{app.translator.trans('core.admin.appearance.favicon_heading')}</legend>
-            <div className="helpText">
-              {app.translator.trans('core.admin.appearance.favicon_text')}
-            </div>
-            <UploadImageButton name="favicon"/>
+            <div className="helpText">{app.translator.trans('core.admin.appearance.favicon_text')}</div>
+            <UploadImageButton name="favicon" />
           </fieldset>
 
           <fieldset>
             <legend>{app.translator.trans('core.admin.appearance.custom_header_heading')}</legend>
-            <div className="helpText">
-              {app.translator.trans('core.admin.appearance.custom_header_text')}
-            </div>
+            <div className="helpText">{app.translator.trans('core.admin.appearance.custom_header_text')}</div>
             {Button.component({
               className: 'Button',
               children: app.translator.trans('core.admin.appearance.edit_header_button'),
-              onclick: () => app.modal.show(new EditCustomHeaderModal())
+              onclick: () => app.modal.show(EditCustomHeaderModal),
             })}
           </fieldset>
 
           <fieldset>
             <legend>{app.translator.trans('core.admin.appearance.custom_footer_heading')}</legend>
-            <div className="helpText">
-              {app.translator.trans('core.admin.appearance.custom_footer_text')}
-            </div>
+            <div className="helpText">{app.translator.trans('core.admin.appearance.custom_footer_text')}</div>
             {Button.component({
               className: 'Button',
               children: app.translator.trans('core.admin.appearance.edit_footer_button'),
-              onclick: () => app.modal.show(new EditCustomFooterModal())
+              onclick: () => app.modal.show(EditCustomFooterModal),
             })}
           </fieldset>
 
           <fieldset>
             <legend>{app.translator.trans('core.admin.appearance.custom_styles_heading')}</legend>
-            <div className="helpText">
-              {app.translator.trans('core.admin.appearance.custom_styles_text')}
-            </div>
+            <div className="helpText">{app.translator.trans('core.admin.appearance.custom_styles_text')}</div>
             {Button.component({
               className: 'Button',
               children: app.translator.trans('core.admin.appearance.edit_css_button'),
-              onclick: () => app.modal.show(new EditCustomCssModal())
+              onclick: () => app.modal.show(EditCustomCssModal),
             })}
           </fieldset>
         </div>
@@ -126,7 +126,7 @@ export default class AppearancePage extends Page {
       theme_primary_color: this.primaryColor(),
       theme_secondary_color: this.secondaryColor(),
       theme_dark_mode: this.darkMode(),
-      theme_colored_header: this.coloredHeader()
+      theme_colored_header: this.coloredHeader(),
     }).then(() => window.location.reload());
   }
 }

js/src/admin/components/BasicsPage.js

@@ -1,8 +1,7 @@
-import Page from './Page';
+import Page from '../../common/components/Page';
 import FieldSet from '../../common/components/FieldSet';
 import Select from '../../common/components/Select';
 import Button from '../../common/components/Button';
-import Alert from '../../common/components/Alert';
 import saveSettings from '../utils/saveSettings';
 import ItemList from '../../common/utils/ItemList';
 import Switch from '../../common/components/Switch';
@@ -20,12 +19,13 @@ export default class BasicsPage extends Page {
       'show_language_selector',
       'default_route',
       'welcome_title',
-      'welcome_message'
+      'welcome_message',
+      'display_name_driver',
     ];
     this.values = {};
 
     const settings = app.data.settings;
-    this.fields.forEach(key => this.values[key] = m.prop(settings[key]));
+    this.fields.forEach((key) => (this.values[key] = m.prop(settings[key])));
 
     this.localeOptions = {};
     const locales = app.data.locales;
@@ -33,7 +33,15 @@ export default class BasicsPage extends Page {
       this.localeOptions[i] = `${locales[i]} (${i})`;
     }
 
-    if (typeof this.values.show_language_selector() !== "number") this.values.show_language_selector(1);
+    this.displayNameOptions = {};
+    const displayNameDrivers = app.data.displayNameDrivers;
+    displayNameDrivers.forEach(function (identifier) {
+      this.displayNameOptions[identifier] = identifier;
+    }, this);
+
+    if (!this.values.display_name_driver() && displayNameDrivers.includes('username')) this.values.display_name_driver('username');
+
+    if (typeof this.values.show_language_selector() !== 'number') this.values.show_language_selector(1);
   }
 
   view() {
@@ -43,75 +51,97 @@ export default class BasicsPage extends Page {
           <form onsubmit={this.onsubmit.bind(this)}>
             {FieldSet.component({
               label: app.translator.trans('core.admin.basics.forum_title_heading'),
-              children: [
-                <input className="FormControl" value={this.values.forum_title()} oninput={m.withAttr('value', this.values.forum_title)}/>
-              ]
+              children: [<input className="FormControl" value={this.values.forum_title()} oninput={m.withAttr('value', this.values.forum_title)} />],
             })}
 
             {FieldSet.component({
               label: app.translator.trans('core.admin.basics.forum_description_heading'),
               children: [
-                <div className="helpText">
-                  {app.translator.trans('core.admin.basics.forum_description_text')}
-                </div>,
-                <textarea className="FormControl" value={this.values.forum_description()} oninput={m.withAttr('value', this.values.forum_description)}/>
-              ]
+                <div className="helpText">{app.translator.trans('core.admin.basics.forum_description_text')}</div>,
+                <textarea
+                  className="FormControl"
+                  value={this.values.forum_description()}
+                  oninput={m.withAttr('value', this.values.forum_description)}
+                />,
+              ],
             })}
 
             {Object.keys(this.localeOptions).length > 1
               ? FieldSet.component({
-                label: app.translator.trans('core.admin.basics.default_language_heading'),
-                children: [
-                  Select.component({
-                    options: this.localeOptions,
-                    value: this.values.default_locale(),
-                    onchange: this.values.default_locale
-                  }),
-                  Switch.component({
-                    state: this.values.show_language_selector(),
-                    onchange: this.values.show_language_selector,
-                    children: app.translator.trans('core.admin.basics.show_language_selector_label'),
-                  })
-                ]
-              })
+                  label: app.translator.trans('core.admin.basics.default_language_heading'),
+                  children: [
+                    Select.component({
+                      options: this.localeOptions,
+                      value: this.values.default_locale(),
+                      onchange: this.values.default_locale,
+                    }),
+                    Switch.component({
+                      state: this.values.show_language_selector(),
+                      onchange: this.values.show_language_selector,
+                      children: app.translator.trans('core.admin.basics.show_language_selector_label'),
+                    }),
+                  ],
+                })
               : ''}
 
             {FieldSet.component({
               label: app.translator.trans('core.admin.basics.home_page_heading'),
               className: 'BasicsPage-homePage',
               children: [
-                <div className="helpText">
-                  {app.translator.trans('core.admin.basics.home_page_text')}
-                </div>,
-                this.homePageItems().toArray().map(({path, label}) =>
-                  <label className="checkbox">
-                    <input type="radio" name="homePage" value={path} checked={this.values.default_route() === path} onclick={m.withAttr('value', this.values.default_route)}/>
-                    {label}
-                  </label>
-                )
-              ]
+                <div className="helpText">{app.translator.trans('core.admin.basics.home_page_text')}</div>,
+                this.homePageItems()
+                  .toArray()
+                  .map(({ path, label }) => (
+                    <label className="checkbox">
+                      <input
+                        type="radio"
+                        name="homePage"
+                        value={path}
+                        checked={this.values.default_route() === path}
+                        onclick={m.withAttr('value', this.values.default_route)}
+                      />
+                      {label}
+                    </label>
+                  )),
+              ],
             })}
 
             {FieldSet.component({
               label: app.translator.trans('core.admin.basics.welcome_banner_heading'),
               className: 'BasicsPage-welcomeBanner',
               children: [
-                <div className="helpText">
-                  {app.translator.trans('core.admin.basics.welcome_banner_text')}
-                </div>,
+                <div className="helpText">{app.translator.trans('core.admin.basics.welcome_banner_text')}</div>,
                 <div className="BasicsPage-welcomeBanner-input">
-                  <input className="FormControl" value={this.values.welcome_title()} oninput={m.withAttr('value', this.values.welcome_title)}/>
-                  <textarea className="FormControl" value={this.values.welcome_message()} oninput={m.withAttr('value', this.values.welcome_message)}/>
-                </div>
-              ]
+                  <input className="FormControl" value={this.values.welcome_title()} oninput={m.withAttr('value', this.values.welcome_title)} />
+                  <textarea
+                    className="FormControl"
+                    value={this.values.welcome_message()}
+                    oninput={m.withAttr('value', this.values.welcome_message)}
+                  />
+                </div>,
+              ],
             })}
 
+            {Object.keys(this.displayNameOptions).length > 1
+              ? FieldSet.component({
+                  label: app.translator.trans('core.admin.basics.display_name_heading'),
+                  children: [
+                    <div className="helpText">{app.translator.trans('core.admin.basics.display_name_text')}</div>,
+                    Select.component({
+                      options: this.displayNameOptions,
+                      value: this.values.display_name_driver(),
+                      onchange: this.values.display_name_driver,
+                    }),
+                  ],
+                })
+              : ''}
+
             {Button.component({
               type: 'submit',
               className: 'Button Button--primary',
               children: app.translator.trans('core.admin.basics.submit_button'),
               loading: this.loading,
-              disabled: !this.changed()
+              disabled: !this.changed(),
             })}
           </form>
         </div>
@@ -120,7 +150,7 @@ export default class BasicsPage extends Page {
   }
 
   changed() {
-    return this.fields.some(key => this.values[key]() !== app.data.settings[key]);
+    return this.fields.some((key) => this.values[key]() !== app.data.settings[key]);
   }
 
   /**
@@ -135,7 +165,7 @@ export default class BasicsPage extends Page {
 
     items.add('allDiscussions', {
       path: '/all',
-      label: app.translator.trans('core.admin.basics.all_discussions_label')
+      label: app.translator.trans('core.admin.basics.all_discussions_label'),
     });
 
     return items;
@@ -151,11 +181,14 @@ export default class BasicsPage extends Page {
 
     const settings = {};
 
-    this.fields.forEach(key => settings[key] = this.values[key]());
+    this.fields.forEach((key) => (settings[key] = this.values[key]()));
 
     saveSettings(settings)
       .then(() => {
-        app.alerts.show(this.successAlert = new Alert({type: 'success', children: app.translator.trans('core.admin.basics.saved_message')}));
+        this.successAlert = app.alerts.show({
+          type: 'success',
+          children: app.translator.trans('core.admin.basics.saved_message'),
+        });
       })
       .catch(() => {})
       .then(() => {

js/src/admin/components/DashboardPage.js

@@ -1,18 +1,16 @@
-import Page from './Page';
+import Page from '../../common/components/Page';
 import StatusWidget from './StatusWidget';
 
 export default class DashboardPage extends Page {
   view() {
     return (
       <div className="DashboardPage">
-        <div className="container">
-          {this.availableWidgets()}
-        </div>
+        <div className="container">{this.availableWidgets()}</div>
       </div>
     );
   }
 
   availableWidgets() {
-    return [<StatusWidget/>];
+    return [<StatusWidget />];
   }
 }

js/src/admin/components/DashboardWidget.js

@@ -1,21 +1,8 @@
-/*
- * This file is part of Flarum.
- *
- * (c) Toby Zerner <toby.zerner@gmail.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
 import Component from '../../common/Component';
 
-export default class Widget extends Component {
+export default class DashboardWidget extends Component {
   view() {
-    return (
-      <div className={"Widget "+this.className()}>
-        {this.content()}
-      </div>
-    );
+    return <div className={'DashboardWidget Widget ' + this.className()}>{this.content()}</div>;
   }
 
   /**

js/src/admin/components/EditCustomCssModal.js

@@ -11,10 +11,14 @@ export default class EditCustomCssModal extends SettingsModal {
 
   form() {
     return [
-      <p>{app.translator.trans('core.admin.edit_css.customize_text', {a: <a href="https://github.com/flarum/core/tree/master/less" target="_blank"/>})}</p>,
+      <p>
+        {app.translator.trans('core.admin.edit_css.customize_text', {
+          a: <a href="https://github.com/flarum/core/tree/master/less" target="_blank" />,
+        })}
+      </p>,
       <div className="Form-group">
-        <textarea className="FormControl" rows="30" bidi={this.setting('custom_less')}/>
-      </div>
+        <textarea className="FormControl" rows="30" bidi={this.setting('custom_less')} />
+      </div>,
     ];
   }
 

js/src/admin/components/EditCustomFooterModal.js

@@ -13,8 +13,8 @@ export default class EditCustomFooterModal extends SettingsModal {
     return [
       <p>{app.translator.trans('core.admin.edit_footer.customize_text')}</p>,
       <div className="Form-group">
-        <textarea className="FormControl" rows="30" bidi={this.setting('custom_footer')}/>
-      </div>
+        <textarea className="FormControl" rows="30" bidi={this.setting('custom_footer')} />
+      </div>,
     ];
   }
 

js/src/admin/components/EditCustomHeaderModal.js

@@ -13,8 +13,8 @@ export default class EditCustomHeaderModal extends SettingsModal {
     return [
       <p>{app.translator.trans('core.admin.edit_header.customize_text')}</p>,
       <div className="Form-group">
-        <textarea className="FormControl" rows="30" bidi={this.setting('custom_header')}/>
-      </div>
+        <textarea className="FormControl" rows="30" bidi={this.setting('custom_header')} />
+      </div>,
     ];
   }
 

js/src/admin/components/EditGroupModal.js

@@ -3,6 +3,7 @@ import Button from '../../common/components/Button';
 import Badge from '../../common/components/Badge';
 import Group from '../../common/models/Group';
 import ItemList from '../../common/utils/ItemList';
+import Switch from '../../common/components/Switch';
 
 /**
  * The `EditGroupModal` component shows a modal dialog which allows the user
@@ -16,6 +17,7 @@ export default class EditGroupModal extends Modal {
     this.namePlural = m.prop(this.group.namePlural() || '');
     this.icon = m.prop(this.group.icon() || '');
     this.color = m.prop(this.group.color() || '');
+    this.isHidden = m.prop(this.group.isHidden() || false);
   }
 
   className() {
@@ -24,21 +26,21 @@ export default class EditGroupModal extends Modal {
 
   title() {
     return [
-      this.color() || this.icon() ? Badge.component({
-        icon: this.icon(),
-        style: {backgroundColor: this.color()}
-      }) : '',
+      this.color() || this.icon()
+        ? Badge.component({
+            icon: this.icon(),
+            style: { backgroundColor: this.color() },
+          })
+        : '',
       ' ',
-      this.namePlural() || app.translator.trans('core.admin.edit_group.title')
+      this.namePlural() || app.translator.trans('core.admin.edit_group.title'),
     ];
   }
 
   content() {
     return (
       <div className="Modal-body">
-        <div className="Form">
-          {this.fields().toArray()}
-        </div>
+        <div className="Form">{this.fields().toArray()}</div>
       </div>
     );
   }
@@ -46,40 +48,80 @@ export default class EditGroupModal extends Modal {
   fields() {
     const items = new ItemList();
 
-    items.add('name', <div className="Form-group">
-      <label>{app.translator.trans('core.admin.edit_group.name_label')}</label>
-      <div className="EditGroupModal-name-input">
-        <input className="FormControl" placeholder={app.translator.trans('core.admin.edit_group.singular_placeholder')} value={this.nameSingular()} oninput={m.withAttr('value', this.nameSingular)}/>
-        <input className="FormControl" placeholder={app.translator.trans('core.admin.edit_group.plural_placeholder')} value={this.namePlural()} oninput={m.withAttr('value', this.namePlural)}/>
-      </div>
-    </div>, 30);
+    items.add(
+      'name',
+      <div className="Form-group">
+        <label>{app.translator.trans('core.admin.edit_group.name_label')}</label>
+        <div className="EditGroupModal-name-input">
+          <input
+            className="FormControl"
+            placeholder={app.translator.trans('core.admin.edit_group.singular_placeholder')}
+            value={this.nameSingular()}
+            oninput={m.withAttr('value', this.nameSingular)}
+          />
+          <input
+            className="FormControl"
+            placeholder={app.translator.trans('core.admin.edit_group.plural_placeholder')}
+            value={this.namePlural()}
+            oninput={m.withAttr('value', this.namePlural)}
+          />
+        </div>
+      </div>,
+      30
+    );
 
-    items.add('color', <div className="Form-group">
-      <label>{app.translator.trans('core.admin.edit_group.color_label')}</label>
-      <input className="FormControl" placeholder="#aaaaaa" value={this.color()} oninput={m.withAttr('value', this.color)}/>
-    </div>, 20);
+    items.add(
+      'color',
+      <div className="Form-group">
+        <label>{app.translator.trans('core.admin.edit_group.color_label')}</label>
+        <input className="FormControl" placeholder="#aaaaaa" value={this.color()} oninput={m.withAttr('value', this.color)} />
+      </div>,
+      20
+    );
 
-    items.add('icon', <div className="Form-group">
-      <label>{app.translator.trans('core.admin.edit_group.icon_label')}</label>
-      <div className="helpText">
-        {app.translator.trans('core.admin.edit_group.icon_text', {a: <a href="https://fontawesome.com/icons?m=free" tabindex="-1"/>})}
-      </div>
-      <input className="FormControl" placeholder="fas fa-bolt" value={this.icon()} oninput={m.withAttr('value', this.icon)}/>
-    </div>, 10);
+    items.add(
+      'icon',
+      <div className="Form-group">
+        <label>{app.translator.trans('core.admin.edit_group.icon_label')}</label>
+        <div className="helpText">
+          {app.translator.trans('core.admin.edit_group.icon_text', { a: <a href="https://fontawesome.com/icons?m=free" tabindex="-1" /> })}
+        </div>
+        <input className="FormControl" placeholder="fas fa-bolt" value={this.icon()} oninput={m.withAttr('value', this.icon)} />
+      </div>,
+      10
+    );
 
-    items.add('submit', <div className="Form-group">
-      {Button.component({
-        type: 'submit',
-        className: 'Button Button--primary EditGroupModal-save',
-        loading: this.loading,
-        children: app.translator.trans('core.admin.edit_group.submit_button')
-      })}
-      {this.group.exists && this.group.id() !== Group.ADMINISTRATOR_ID ? (
-        <button type="button" className="Button EditGroupModal-delete" onclick={this.deleteGroup.bind(this)}>
-          {app.translator.trans('core.admin.edit_group.delete_button')}
-        </button>
-      ) : ''}
-    </div>, -10);
+    items.add(
+      'hidden',
+      <div className="Form-group">
+        {Switch.component({
+          state: !!Number(this.isHidden()),
+          children: app.translator.trans('core.admin.edit_group.hide_label'),
+          onchange: this.isHidden,
+        })}
+      </div>,
+      10
+    );
+
+    items.add(
+      'submit',
+      <div className="Form-group">
+        {Button.component({
+          type: 'submit',
+          className: 'Button Button--primary EditGroupModal-save',
+          loading: this.loading,
+          children: app.translator.trans('core.admin.edit_group.submit_button'),
+        })}
+        {this.group.exists && this.group.id() !== Group.ADMINISTRATOR_ID ? (
+          <button type="button" className="Button EditGroupModal-delete" onclick={this.deleteGroup.bind(this)}>
+            {app.translator.trans('core.admin.edit_group.delete_button')}
+          </button>
+        ) : (
+          ''
+        )}
+      </div>,
+      -10
+    );
 
     return items;
   }
@@ -89,7 +131,8 @@ export default class EditGroupModal extends Modal {
       nameSingular: this.nameSingular(),
       namePlural: this.namePlural(),
       color: this.color(),
-      icon: this.icon()
+      icon: this.icon(),
+      isHidden: this.isHidden(),
     };
   }
 
@@ -98,7 +141,8 @@ export default class EditGroupModal extends Modal {
 
     this.loading = true;
 
-    this.group.save(this.submitData(), {errorHandler: this.onerror.bind(this)})
+    this.group
+      .save(this.submitData(), { errorHandler: this.onerror.bind(this) })
       .then(this.hide.bind(this))
       .catch(() => {
         this.loading = false;

js/src/admin/components/ExtensionsPage.js

@@ -1,13 +1,10 @@
-import Page from './Page';
-import LinkButton from '../../common/components/LinkButton';
+import Page from '../../common/components/Page';
 import Button from '../../common/components/Button';
 import Dropdown from '../../common/components/Dropdown';
-import Separator from '../../common/components/Separator';
 import AddExtensionModal from './AddExtensionModal';
 import LoadingModal from './LoadingModal';
 import ItemList from '../../common/utils/ItemList';
 import icon from '../../common/helpers/icon';
-import listItems from '../../common/helpers/listItems';
 
 export default class ExtensionsPage extends Page {
   view() {
@@ -19,7 +16,7 @@ export default class ExtensionsPage extends Page {
               children: app.translator.trans('core.admin.extensions.add_button'),
               icon: 'fas fa-plus',
               className: 'Button Button--primary',
-              onclick: () => app.modal.show(new AddExtensionModal())
+              onclick: () => app.modal.show(AddExtensionModal),
             })}
           </div>
         </div>
@@ -27,12 +24,12 @@ export default class ExtensionsPage extends Page {
         <div className="ExtensionsPage-list">
           <div className="container">
             <ul className="ExtensionList">
-              {Object.keys(app.data.extensions)
-                .map(id => {
-                  const extension = app.data.extensions[id];
-                  const controls = this.controlItems(extension.id).toArray();
+              {Object.keys(app.data.extensions).map((id) => {
+                const extension = app.data.extensions[id];
+                const controls = this.controlItems(extension.id).toArray();
 
-                  return <li className={'ExtensionListItem ' + (!this.isEnabled(extension.id) ? 'disabled' : '')}>
+                return (
+                  <li className={'ExtensionListItem ' + (!this.isEnabled(extension.id) ? 'disabled' : '')}>
                     <div className="ExtensionListItem-content">
                       <span className="ExtensionListItem-icon ExtensionIcon" style={extension.icon}>
                         {extension.icon ? icon(extension.icon.name) : ''}
@@ -42,21 +39,25 @@ export default class ExtensionsPage extends Page {
                           className="ExtensionListItem-controls"
                           buttonClassName="Button Button--icon Button--flat"
                           menuClassName="Dropdown-menu--right"
-                          icon="fas fa-ellipsis-h">
+                          icon="fas fa-ellipsis-h"
+                        >
                           {controls}
                         </Dropdown>
-                      ) : ''}
+                      ) : (
+                        ''
+                      )}
                       <div className="ExtensionListItem-main">
                         <label className="ExtensionListItem-title">
-                          <input type="checkbox" checked={this.isEnabled(extension.id)} onclick={this.toggle.bind(this, extension.id)}/> {' '}
-                            {extension.extra['flarum-extension'].title}
+                          <input type="checkbox" checked={this.isEnabled(extension.id)} onclick={this.toggle.bind(this, extension.id)} />{' '}
+                          {extension.extra['flarum-extension'].title}
                         </label>
                         <div className="ExtensionListItem-version">{extension.version}</div>
                         <div className="ExtensionListItem-description">{extension.description}</div>
                       </div>
                     </div>
-                  </li>;
-                })}
+                  </li>
+                );
+              })}
             </ul>
           </div>
         </div>
@@ -69,26 +70,34 @@ export default class ExtensionsPage extends Page {
     const enabled = this.isEnabled(name);
 
     if (app.extensionSettings[name]) {
-      items.add('settings', Button.component({
-        icon: 'fas fa-cog',
-        children: app.translator.trans('core.admin.extensions.settings_button'),
-        onclick: app.extensionSettings[name]
-      }));
+      items.add(
+        'settings',
+        Button.component({
+          icon: 'fas fa-cog',
+          children: app.translator.trans('core.admin.extensions.settings_button'),
+          onclick: app.extensionSettings[name],
+        })
+      );
     }
 
     if (!enabled) {
-      items.add('uninstall', Button.component({
-        icon: 'far fa-trash-alt',
-        children: app.translator.trans('core.admin.extensions.uninstall_button'),
-        onclick: () => {
-          app.request({
-            url: app.forum.attribute('apiUrl') + '/extensions/' + name,
-            method: 'DELETE'
-          }).then(() => window.location.reload());
+      items.add(
+        'uninstall',
+        Button.component({
+          icon: 'far fa-trash-alt',
+          children: app.translator.trans('core.admin.extensions.uninstall_button'),
+          onclick: () => {
+            app
+              .request({
+                url: app.forum.attribute('apiUrl') + '/extensions/' + name,
+                method: 'DELETE',
+              })
+              .then(() => window.location.reload());
 
-          app.modal.show(new LoadingModal());
-        }
-      }));
+            app.modal.show(LoadingModal);
+          },
+        })
+      );
     }
 
     return items;
@@ -103,15 +112,17 @@ export default class ExtensionsPage extends Page {
   toggle(id) {
     const enabled = this.isEnabled(id);
 
-    app.request({
-      url: app.forum.attribute('apiUrl') + '/extensions/' + id,
-      method: 'PATCH',
-      data: {enabled: !enabled}
-    }).then(() => {
-      if (!enabled) localStorage.setItem('enabledExtension', id);
-      window.location.reload();
-    });
+    app
+      .request({
+        url: app.forum.attribute('apiUrl') + '/extensions/' + id,
+        method: 'PATCH',
+        data: { enabled: !enabled },
+      })
+      .then(() => {
+        if (!enabled) localStorage.setItem('enabledExtension', id);
+        window.location.reload();
+      });
 
-    app.modal.show(new LoadingModal());
+    app.modal.show(LoadingModal);
   }
 }

js/src/admin/components/HeaderPrimary.js

@@ -8,11 +8,7 @@ import listItems from '../../common/helpers/listItems';
  */
 export default class HeaderPrimary extends Component {
   view() {
-    return (
-      <ul className="Header-controls">
-        {listItems(this.items().toArray())}
-      </ul>
-    );
+    return <ul className="Header-controls">{listItems(this.items().toArray())}</ul>;
   }
 
   config(isInitialized, context) {

js/src/admin/components/HeaderSecondary.js

@@ -8,11 +8,7 @@ import listItems from '../../common/helpers/listItems';
  */
 export default class HeaderSecondary extends Component {
   view() {
-    return (
-      <ul className="Header-controls">
-        {listItems(this.items().toArray())}
-      </ul>
-    );
+    return <ul className="Header-controls">{listItems(this.items().toArray())}</ul>;
   }
 
   config(isInitialized, context) {

js/src/admin/components/LoadingModal.js

@@ -1,9 +1,10 @@
 import Modal from '../../common/components/Modal';
 
 export default class LoadingModal extends Modal {
-  isDismissible() {
-    return false;
-  }
+  /**
+   * @inheritdoc
+   */
+  static isDismissible = false;
 
   className() {
     return 'LoadingModal Modal--small';

js/src/admin/components/MailPage.js

@@ -1,4 +1,4 @@
-import Page from './Page';
+import Page from '../../common/components/Page';
 import FieldSet from '../../common/components/FieldSet';
 import Button from '../../common/components/Button';
 import Alert from '../../common/components/Alert';
@@ -10,38 +10,46 @@ export default class MailPage extends Page {
   init() {
     super.init();
 
-    this.loading = true;
     this.saving = false;
+    this.sendingTest = false;
+    this.refresh();
+  }
+
+  refresh() {
+    this.loading = true;
 
     this.driverFields = {};
     this.fields = ['mail_driver', 'mail_from'];
     this.values = {};
+    this.status = { sending: false, errors: {} };
 
     const settings = app.data.settings;
-    this.fields.forEach(key => this.values[key] = m.prop(settings[key]));
+    this.fields.forEach((key) => (this.values[key] = m.prop(settings[key])));
 
-    app.request({
-      method: 'GET',
-      url: app.forum.attribute('apiUrl') + '/mail-drivers'
-    }).then(response => {
-      this.driverFields = response['data'].reduce(
-        (hash, driver) => ({...hash, [driver['id']]: driver['attributes']['fields']}),
-        {}
-      );
+    app
+      .request({
+        method: 'GET',
+        url: app.forum.attribute('apiUrl') + '/mail/settings',
+      })
+      .then((response) => {
+        this.driverFields = response['data']['attributes']['fields'];
+        this.status.sending = response['data']['attributes']['sending'];
+        this.status.errors = response['data']['attributes']['errors'];
 
-      Object.keys(this.driverFields).flatMap(key => this.driverFields[key]).forEach(
-        key => {
-          this.fields.push(key);
-          this.values[key] = m.prop(settings[key]);
+        for (const driver in this.driverFields) {
+          for (const field in this.driverFields[driver]) {
+            this.fields.push(field);
+            this.values[field] = m.prop(settings[field]);
+          }
         }
-      );
-      this.loading = false;
-      m.redraw();
-    });
+
+        this.loading = false;
+        m.redraw();
+      });
   }
 
   view() {
-    if (this.loading) {
+    if (this.loading || this.saving) {
       return (
         <div className="MailPage">
           <div className="container">
@@ -51,24 +59,27 @@ export default class MailPage extends Page {
       );
     }
 
+    const fields = this.driverFields[this.values.mail_driver()];
+    const fieldKeys = Object.keys(fields);
+
     return (
       <div className="MailPage">
         <div className="container">
           <form onsubmit={this.onsubmit.bind(this)}>
             <h2>{app.translator.trans('core.admin.email.heading')}</h2>
-            <div className="helpText">
-              {app.translator.trans('core.admin.email.text')}
-            </div>
+            <div className="helpText">{app.translator.trans('core.admin.email.text')}</div>
 
             {FieldSet.component({
               label: app.translator.trans('core.admin.email.addresses_heading'),
               className: 'MailPage-MailSettings',
               children: [
                 <div className="MailPage-MailSettings-input">
-                  <label>{app.translator.trans('core.admin.email.from_label')}</label>
-                  <input className="FormControl" value={this.values.mail_from() || ''} oninput={m.withAttr('value', this.values.mail_from)} />
-                </div>
-              ]
+                  <label>
+                    {app.translator.trans('core.admin.email.from_label')}
+                    <input className="FormControl" value={this.values.mail_from() || ''} oninput={m.withAttr('value', this.values.mail_from)} />
+                  </label>
+                </div>,
+              ],
             })}
 
             {FieldSet.component({
@@ -76,31 +87,62 @@ export default class MailPage extends Page {
               className: 'MailPage-MailSettings',
               children: [
                 <div className="MailPage-MailSettings-input">
-                  <label>{app.translator.trans('core.admin.email.driver_label')}</label>
-                  <Select value={this.values.mail_driver()} options={Object.keys(this.driverFields).reduce((memo, val) => ({...memo, [val]: val}), {})} onchange={this.values.mail_driver} />
-                </div>
-              ]
+                  <label>
+                    {app.translator.trans('core.admin.email.driver_label')}
+                    <Select
+                      value={this.values.mail_driver()}
+                      options={Object.keys(this.driverFields).reduce((memo, val) => ({ ...memo, [val]: val }), {})}
+                      onchange={this.values.mail_driver}
+                    />
+                  </label>
+                </div>,
+              ],
             })}
 
-            {Object.keys(this.driverFields[this.values.mail_driver()]).length > 0 && FieldSet.component({
-              label: app.translator.trans(`core.admin.email.${this.values.mail_driver()}_heading`),
+            {this.status.sending ||
+              Alert.component({
+                children: app.translator.trans('core.admin.email.not_sending_message'),
+                dismissible: false,
+              })}
+
+            {fieldKeys.length > 0 &&
+              FieldSet.component({
+                label: app.translator.trans(`core.admin.email.${this.values.mail_driver()}_heading`),
+                className: 'MailPage-MailSettings',
+                children: [
+                  <div className="MailPage-MailSettings-input">
+                    {fieldKeys.map((field) => [
+                      <label>
+                        {app.translator.trans(`core.admin.email.${field}_label`)}
+                        {this.renderField(field)}
+                      </label>,
+                      this.status.errors[field] && <p className="ValidationError">{this.status.errors[field]}</p>,
+                    ])}
+                  </div>,
+                ],
+              })}
+
+            <FieldSet>
+              {Button.component({
+                type: 'submit',
+                className: 'Button Button--primary',
+                children: app.translator.trans('core.admin.email.submit_button'),
+                disabled: !this.changed(),
+              })}
+            </FieldSet>
+
+            {FieldSet.component({
+              label: app.translator.trans('core.admin.email.send_test_mail_heading'),
               className: 'MailPage-MailSettings',
               children: [
-                <div className="MailPage-MailSettings-input">
-                  {this.driverFields[this.values.mail_driver()].flatMap(field => [
-                    <label>{app.translator.trans(`core.admin.email.${field}_label`)}</label>,
-                    <input className="FormControl" value={this.values[field]() || ''} oninput={m.withAttr('value', this.values[field])} />
-                  ])}
-                </div>
-              ]
-            })}
-
-            {Button.component({
-              type: 'submit',
-              className: 'Button Button--primary',
-              children: app.translator.trans('core.admin.email.submit_button'),
-              loading: this.saving,
-              disabled: !this.changed()
+                <div className="helpText">{app.translator.trans('core.admin.email.send_test_mail_text', { email: app.session.user.email() })}</div>,
+                Button.component({
+                  className: 'Button Button--primary',
+                  children: app.translator.trans('core.admin.email.send_test_mail_button'),
+                  disabled: this.sendingTest || this.changed(),
+                  onclick: () => this.sendTestEmail(),
+                }),
+              ],
             })}
           </form>
         </div>
@@ -108,30 +150,70 @@ export default class MailPage extends Page {
     );
   }
 
+  renderField(name) {
+    const driver = this.values.mail_driver();
+    const field = this.driverFields[driver][name];
+    const prop = this.values[name];
+
+    if (typeof field === 'string') {
+      return <input className="FormControl" value={prop() || ''} oninput={m.withAttr('value', prop)} />;
+    } else {
+      return <Select value={prop()} options={field} onchange={prop} />;
+    }
+  }
+
   changed() {
-    return this.fields.some(key => this.values[key]() !== app.data.settings[key]);
+    return this.fields.some((key) => this.values[key]() !== app.data.settings[key]);
+  }
+
+  sendTestEmail() {
+    if (this.saving || this.sendingTest) return;
+
+    this.sendingTest = true;
+    app.alerts.dismiss(this.testEmailSuccessAlert);
+
+    app
+      .request({
+        method: 'POST',
+        url: app.forum.attribute('apiUrl') + '/mail/test',
+      })
+      .then((response) => {
+        this.sendingTest = false;
+        this.testEmailSuccessAlert = app.alerts.show({
+          type: 'success',
+          children: app.translator.trans('core.admin.email.send_test_mail_success'),
+        });
+      })
+      .catch((error) => {
+        this.sendingTest = false;
+        m.redraw();
+        throw error;
+      });
   }
 
   onsubmit(e) {
     e.preventDefault();
 
-    if (this.saving) return;
+    if (this.saving || this.sendingTest) return;
 
     this.saving = true;
     app.alerts.dismiss(this.successAlert);
 
     const settings = {};
 
-    this.fields.forEach(key => settings[key] = this.values[key]());
+    this.fields.forEach((key) => (settings[key] = this.values[key]()));
 
     saveSettings(settings)
       .then(() => {
-        app.alerts.show(this.successAlert = new Alert({type: 'success', children: app.translator.trans('core.admin.basics.saved_message')}));
+        this.successAlert = app.alerts.show({
+          type: 'success',
+          children: app.translator.trans('core.admin.basics.saved_message'),
+        });
       })
       .catch(() => {})
       .then(() => {
         this.saving = false;
-        m.redraw();
+        this.refresh();
       });
   }
 }

js/src/admin/components/Page.js

@@ -1,32 +0,0 @@
-import Component from '../../common/Component';
-
-/**
- * The `Page` component
- *
- * @abstract
- */
-export default class Page extends Component {
-  init() {
-    app.previous = app.current;
-    app.current = this;
-
-    app.modal.close();
-
-    /**
-     * A class name to apply to the body while the route is active.
-     *
-     * @type {String}
-     */
-    this.bodyClass = '';
-  }
-
-  config(isInitialized, context) {
-    if (isInitialized) return;
-
-    if (this.bodyClass) {
-      $('#app').addClass(this.bodyClass);
-
-      context.onunload = () => $('#app').removeClass(this.bodyClass);
-    }
-  }
-}

js/src/admin/components/PermissionDropdown.js

@@ -8,26 +8,25 @@ import GroupBadge from '../../common/components/GroupBadge';
 function badgeForId(id) {
   const group = app.store.getById('groups', id);
 
-  return group ? GroupBadge.component({group, label: null}) : '';
+  return group ? GroupBadge.component({ group, label: null }) : '';
 }
 
 function filterByRequiredPermissions(groupIds, permission) {
-  app.getRequiredPermissions(permission)
-    .forEach(required => {
-      const restrictToGroupIds = app.data.permissions[required] || [];
+  app.getRequiredPermissions(permission).forEach((required) => {
+    const restrictToGroupIds = app.data.permissions[required] || [];
 
-      if (restrictToGroupIds.indexOf(Group.GUEST_ID) !== -1) {
-        // do nothing
-      } else if (restrictToGroupIds.indexOf(Group.MEMBER_ID) !== -1) {
-        groupIds = groupIds.filter(id => id !== Group.GUEST_ID);
-      } else if (groupIds.indexOf(Group.MEMBER_ID) !== -1) {
-        groupIds = restrictToGroupIds;
-      } else {
-        groupIds = restrictToGroupIds.filter(id => groupIds.indexOf(id) !== -1);
-      }
+    if (restrictToGroupIds.indexOf(Group.GUEST_ID) !== -1) {
+      // do nothing
+    } else if (restrictToGroupIds.indexOf(Group.MEMBER_ID) !== -1) {
+      groupIds = groupIds.filter((id) => id !== Group.GUEST_ID);
+    } else if (groupIds.indexOf(Group.MEMBER_ID) !== -1) {
+      groupIds = restrictToGroupIds;
+    } else {
+      groupIds = restrictToGroupIds.filter((id) => groupIds.indexOf(id) !== -1);
+    }
 
-      groupIds = filterByRequiredPermissions(groupIds, required);
-    });
+    groupIds = filterByRequiredPermissions(groupIds, required);
+  });
 
   return groupIds;
 }
@@ -52,34 +51,31 @@ export default class PermissionDropdown extends Dropdown {
     const adminGroup = app.store.getById('groups', Group.ADMINISTRATOR_ID);
 
     if (everyone) {
-      this.props.label = Badge.component({icon: 'fas fa-globe'});
+      this.props.label = Badge.component({ icon: 'fas fa-globe' });
     } else if (members) {
-      this.props.label = Badge.component({icon: 'fas fa-user'});
+      this.props.label = Badge.component({ icon: 'fas fa-user' });
     } else {
-      this.props.label = [
-        badgeForId(Group.ADMINISTRATOR_ID),
-        groupIds.map(badgeForId)
-      ];
+      this.props.label = [badgeForId(Group.ADMINISTRATOR_ID), groupIds.map(badgeForId)];
     }
 
     if (this.showing) {
       if (this.props.allowGuest) {
         this.props.children.push(
           Button.component({
-            children: [Badge.component({icon: 'fas fa-globe'}), ' ', app.translator.trans('core.admin.permissions_controls.everyone_button')],
+            children: [Badge.component({ icon: 'fas fa-globe' }), ' ', app.translator.trans('core.admin.permissions_controls.everyone_button')],
             icon: everyone ? 'fas fa-check' : true,
             onclick: () => this.save([Group.GUEST_ID]),
-            disabled: this.isGroupDisabled(Group.GUEST_ID)
+            disabled: this.isGroupDisabled(Group.GUEST_ID),
           })
         );
       }
 
       this.props.children.push(
         Button.component({
-          children: [Badge.component({icon: 'fas fa-user'}), ' ', app.translator.trans('core.admin.permissions_controls.members_button')],
+          children: [Badge.component({ icon: 'fas fa-user' }), ' ', app.translator.trans('core.admin.permissions_controls.members_button')],
           icon: members ? 'fas fa-check' : true,
           onclick: () => this.save([Group.MEMBER_ID]),
-          disabled: this.isGroupDisabled(Group.MEMBER_ID)
+          disabled: this.isGroupDisabled(Group.MEMBER_ID),
         }),
 
         Separator.component(),
@@ -88,26 +84,29 @@ export default class PermissionDropdown extends Dropdown {
           children: [badgeForId(adminGroup.id()), ' ', adminGroup.namePlural()],
           icon: !everyone && !members ? 'fas fa-check' : true,
           disabled: !everyone && !members,
-          onclick: e => {
+          onclick: (e) => {
             if (e.shiftKey) e.stopPropagation();
             this.save([]);
-          }
+          },
         })
       );
 
       [].push.apply(
         this.props.children,
-        app.store.all('groups')
-          .filter(group => [Group.ADMINISTRATOR_ID, Group.GUEST_ID, Group.MEMBER_ID].indexOf(group.id()) === -1)
-          .map(group => Button.component({
-            children: [badgeForId(group.id()), ' ', group.namePlural()],
-            icon: groupIds.indexOf(group.id()) !== -1 ? 'fas fa-check' : true,
-            onclick: (e) => {
-              if (e.shiftKey) e.stopPropagation();
-              this.toggle(group.id());
-            },
-            disabled: this.isGroupDisabled(group.id()) && this.isGroupDisabled(Group.MEMBER_ID) && this.isGroupDisabled(Group.GUEST_ID)
-          }))
+        app.store
+          .all('groups')
+          .filter((group) => [Group.ADMINISTRATOR_ID, Group.GUEST_ID, Group.MEMBER_ID].indexOf(group.id()) === -1)
+          .map((group) =>
+            Button.component({
+              children: [badgeForId(group.id()), ' ', group.namePlural()],
+              icon: groupIds.indexOf(group.id()) !== -1 ? 'fas fa-check' : true,
+              onclick: (e) => {
+                if (e.shiftKey) e.stopPropagation();
+                this.toggle(group.id());
+              },
+              disabled: this.isGroupDisabled(group.id()) && this.isGroupDisabled(Group.MEMBER_ID) && this.isGroupDisabled(Group.GUEST_ID),
+            })
+          )
       );
     }
 
@@ -122,7 +121,7 @@ export default class PermissionDropdown extends Dropdown {
     app.request({
       method: 'POST',
       url: app.forum.attribute('apiUrl') + '/permission',
-      data: {permission, groupIds}
+      data: { permission, groupIds },
     });
   }
 
@@ -137,7 +136,7 @@ export default class PermissionDropdown extends Dropdown {
       groupIds.splice(index, 1);
     } else {
       groupIds.push(groupId);
-      groupIds = groupIds.filter(id => [Group.GUEST_ID, Group.MEMBER_ID].indexOf(id) === -1);
+      groupIds = groupIds.filter((id) => [Group.GUEST_ID, Group.MEMBER_ID].indexOf(id) === -1);
     }
 
     this.save(groupIds);

js/src/admin/components/PermissionGrid.js

@@ -13,12 +13,8 @@ export default class PermissionGrid extends Component {
   view() {
     const scopes = this.scopeItems().toArray();
 
-    const permissionCells = permission => {
-      return scopes.map(scope => (
-        <td>
-          {scope.render(permission)}
-        </td>
-      ));
+    const permissionCells = (permission) => {
+      return scopes.map((scope) => <td>{scope.render(permission)}</td>);
     };
 
     return (
@@ -26,27 +22,32 @@ export default class PermissionGrid extends Component {
         <thead>
           <tr>
             <td></td>
-            {scopes.map(scope => (
+            {scopes.map((scope) => (
               <th>
                 {scope.label}{' '}
-                {scope.onremove ? Button.component({icon: 'fas fa-times', className: 'Button Button--text PermissionGrid-removeScope', onclick: scope.onremove}) : ''}
+                {scope.onremove
+                  ? Button.component({ icon: 'fas fa-times', className: 'Button Button--text PermissionGrid-removeScope', onclick: scope.onremove })
+                  : ''}
               </th>
             ))}
             <th>{this.scopeControlItems().toArray()}</th>
           </tr>
         </thead>
-        {this.permissions.map(section => (
+        {this.permissions.map((section) => (
           <tbody>
             <tr className="PermissionGrid-section">
               <th>{section.label}</th>
               {permissionCells(section)}
-              <td/>
+              <td />
             </tr>
-            {section.children.map(child => (
+            {section.children.map((child) => (
               <tr className="PermissionGrid-child">
-                <th>{icon(child.icon)}{child.label}</th>
+                <th>
+                  {icon(child.icon)}
+                  {child.label}
+                </th>
                 {permissionCells(child)}
-                <td/>
+                <td />
               </tr>
             ))}
           </tbody>
@@ -58,25 +59,41 @@ export default class PermissionGrid extends Component {
   permissionItems() {
     const items = new ItemList();
 
-    items.add('view', {
-      label: app.translator.trans('core.admin.permissions.read_heading'),
-      children: this.viewItems().toArray()
-    }, 100);
+    items.add(
+      'view',
+      {
+        label: app.translator.trans('core.admin.permissions.read_heading'),
+        children: this.viewItems().toArray(),
+      },
+      100
+    );
 
-    items.add('start', {
-      label: app.translator.trans('core.admin.permissions.create_heading'),
-      children: this.startItems().toArray()
-    }, 90);
+    items.add(
+      'start',
+      {
+        label: app.translator.trans('core.admin.permissions.create_heading'),
+        children: this.startItems().toArray(),
+      },
+      90
+    );
 
-    items.add('reply', {
-      label: app.translator.trans('core.admin.permissions.participate_heading'),
-      children: this.replyItems().toArray()
-    }, 80);
+    items.add(
+      'reply',
+      {
+        label: app.translator.trans('core.admin.permissions.participate_heading'),
+        children: this.replyItems().toArray(),
+      },
+      80
+    );
 
-    items.add('moderate', {
-      label: app.translator.trans('core.admin.permissions.moderate_heading'),
-      children: this.moderateItems().toArray()
-    }, 70);
+    items.add(
+      'moderate',
+      {
+        label: app.translator.trans('core.admin.permissions.moderate_heading'),
+        children: this.moderateItems().toArray(),
+      },
+      70
+    );
 
     return items;
   }
@@ -84,31 +101,54 @@ export default class PermissionGrid extends Component {
   viewItems() {
     const items = new ItemList();
 
-    items.add('viewDiscussions', {
-      icon: 'fas fa-eye',
-      label: app.translator.trans('core.admin.permissions.view_discussions_label'),
-      permission: 'viewDiscussions',
-      allowGuest: true
-    }, 100);
+    items.add(
+      'viewDiscussions',
+      {
+        icon: 'fas fa-eye',
+        label: app.translator.trans('core.admin.permissions.view_discussions_label'),
+        permission: 'viewDiscussions',
+        allowGuest: true,
+      },
+      100
+    );
 
-    items.add('viewUserList', {
-      icon: 'fas fa-users',
-      label: app.translator.trans('core.admin.permissions.view_user_list_label'),
-      permission: 'viewUserList',
-      allowGuest: true
-    }, 100);
+    items.add(
+      'viewHiddenGroups',
+      {
+        icon: 'fas fa-users',
+        label: app.translator.trans('core.admin.permissions.view_hidden_groups_label'),
+        permission: 'viewHiddenGroups',
+      },
+      100
+    );
 
-    items.add('signUp', {
-      icon: 'fas fa-user-plus',
-      label: app.translator.trans('core.admin.permissions.sign_up_label'),
-      setting: () => SettingDropdown.component({
-        key: 'allow_sign_up',
-        options: [
-          {value: '1', label: app.translator.trans('core.admin.permissions_controls.signup_open_button')},
-          {value: '0', label: app.translator.trans('core.admin.permissions_controls.signup_closed_button')}
-        ]
-      })
-    }, 90);
+    items.add(
+      'viewUserList',
+      {
+        icon: 'fas fa-users',
+        label: app.translator.trans('core.admin.permissions.view_user_list_label'),
+        permission: 'viewUserList',
+        allowGuest: true,
+      },
+      100
+    );
+
+    items.add(
+      'signUp',
+      {
+        icon: 'fas fa-user-plus',
+        label: app.translator.trans('core.admin.permissions.sign_up_label'),
+        setting: () =>
+          SettingDropdown.component({
+            key: 'allow_sign_up',
+            options: [
+              { value: '1', label: app.translator.trans('core.admin.permissions_controls.signup_open_button') },
+              { value: '0', label: app.translator.trans('core.admin.permissions_controls.signup_closed_button') },
+            ],
+          }),
+      },
+      90
+    );
 
     items.add('viewLastSeenAt', {
       icon: 'far fa-clock',
@@ -122,31 +162,39 @@ export default class PermissionGrid extends Component {
   startItems() {
     const items = new ItemList();
 
-    items.add('start', {
-      icon: 'fas fa-edit',
-      label: app.translator.trans('core.admin.permissions.start_discussions_label'),
-      permission: 'startDiscussion'
-    }, 100);
+    items.add(
+      'start',
+      {
+        icon: 'fas fa-edit',
+        label: app.translator.trans('core.admin.permissions.start_discussions_label'),
+        permission: 'startDiscussion',
+      },
+      100
+    );
 
-    items.add('allowRenaming', {
-      icon: 'fas fa-i-cursor',
-      label: app.translator.trans('core.admin.permissions.allow_renaming_label'),
-      setting: () => {
-        const minutes = parseInt(app.data.settings.allow_renaming, 10);
+    items.add(
+      'allowRenaming',
+      {
+        icon: 'fas fa-i-cursor',
+        label: app.translator.trans('core.admin.permissions.allow_renaming_label'),
+        setting: () => {
+          const minutes = parseInt(app.data.settings.allow_renaming, 10);
 
-        return SettingDropdown.component({
-          defaultLabel: minutes
-            ? app.translator.transChoice('core.admin.permissions_controls.allow_some_minutes_button', minutes, {count: minutes})
-            : app.translator.trans('core.admin.permissions_controls.allow_indefinitely_button'),
-          key: 'allow_renaming',
-          options: [
-            {value: '-1', label: app.translator.trans('core.admin.permissions_controls.allow_indefinitely_button')},
-            {value: '10', label: app.translator.trans('core.admin.permissions_controls.allow_ten_minutes_button')},
-            {value: 'reply', label: app.translator.trans('core.admin.permissions_controls.allow_until_reply_button')}
-          ]
-        });
-      }
-    }, 90);
+          return SettingDropdown.component({
+            defaultLabel: minutes
+              ? app.translator.transChoice('core.admin.permissions_controls.allow_some_minutes_button', minutes, { count: minutes })
+              : app.translator.trans('core.admin.permissions_controls.allow_indefinitely_button'),
+            key: 'allow_renaming',
+            options: [
+              { value: '-1', label: app.translator.trans('core.admin.permissions_controls.allow_indefinitely_button') },
+              { value: '10', label: app.translator.trans('core.admin.permissions_controls.allow_ten_minutes_button') },
+              { value: 'reply', label: app.translator.trans('core.admin.permissions_controls.allow_until_reply_button') },
+            ],
+          });
+        },
+      },
+      90
+    );
 
     return items;
   }
@@ -154,31 +202,39 @@ export default class PermissionGrid extends Component {
   replyItems() {
     const items = new ItemList();
 
-    items.add('reply', {
-      icon: 'fas fa-reply',
-      label: app.translator.trans('core.admin.permissions.reply_to_discussions_label'),
-      permission: 'discussion.reply'
-    }, 100);
+    items.add(
+      'reply',
+      {
+        icon: 'fas fa-reply',
+        label: app.translator.trans('core.admin.permissions.reply_to_discussions_label'),
+        permission: 'discussion.reply',
+      },
+      100
+    );
 
-    items.add('allowPostEditing', {
-      icon: 'fas fa-pencil-alt',
-      label: app.translator.trans('core.admin.permissions.allow_post_editing_label'),
-      setting: () => {
-        const minutes = parseInt(app.data.settings.allow_post_editing, 10);
+    items.add(
+      'allowPostEditing',
+      {
+        icon: 'fas fa-pencil-alt',
+        label: app.translator.trans('core.admin.permissions.allow_post_editing_label'),
+        setting: () => {
+          const minutes = parseInt(app.data.settings.allow_post_editing, 10);
 
-        return SettingDropdown.component({
-          defaultLabel: minutes
-            ? app.translator.transChoice('core.admin.permissions_controls.allow_some_minutes_button', minutes, {count: minutes})
-            : app.translator.trans('core.admin.permissions_controls.allow_indefinitely_button'),
-          key: 'allow_post_editing',
-          options: [
-            {value: '-1', label: app.translator.trans('core.admin.permissions_controls.allow_indefinitely_button')},
-            {value: '10', label: app.translator.trans('core.admin.permissions_controls.allow_ten_minutes_button')},
-            {value: 'reply', label: app.translator.trans('core.admin.permissions_controls.allow_until_reply_button')}
-          ]
-        });
-      }
-    }, 90);
+          return SettingDropdown.component({
+            defaultLabel: minutes
+              ? app.translator.transChoice('core.admin.permissions_controls.allow_some_minutes_button', minutes, { count: minutes })
+              : app.translator.trans('core.admin.permissions_controls.allow_indefinitely_button'),
+            key: 'allow_post_editing',
+            options: [
+              { value: '-1', label: app.translator.trans('core.admin.permissions_controls.allow_indefinitely_button') },
+              { value: '10', label: app.translator.trans('core.admin.permissions_controls.allow_ten_minutes_button') },
+              { value: 'reply', label: app.translator.trans('core.admin.permissions_controls.allow_until_reply_button') },
+            ],
+          });
+        },
+      },
+      90
+    );
 
     return items;
   }
@@ -186,75 +242,121 @@ export default class PermissionGrid extends Component {
   moderateItems() {
     const items = new ItemList();
 
-    items.add('viewIpsPosts', {
-      icon: 'fas fa-bullseye',
-      label: app.translator.trans('core.admin.permissions.view_post_ips_label'),
-      permission: 'discussion.viewIpsPosts'
-    }, 110);
+    items.add(
+      'viewIpsPosts',
+      {
+        icon: 'fas fa-bullseye',
+        label: app.translator.trans('core.admin.permissions.view_post_ips_label'),
+        permission: 'discussion.viewIpsPosts',
+      },
+      110
+    );
 
-    items.add('renameDiscussions', {
-      icon: 'fas fa-i-cursor',
-      label: app.translator.trans('core.admin.permissions.rename_discussions_label'),
-      permission: 'discussion.rename'
-    }, 100);
+    items.add(
+      'renameDiscussions',
+      {
+        icon: 'fas fa-i-cursor',
+        label: app.translator.trans('core.admin.permissions.rename_discussions_label'),
+        permission: 'discussion.rename',
+      },
+      100
+    );
 
-    items.add('hideDiscussions', {
-      icon: 'far fa-trash-alt',
-      label: app.translator.trans('core.admin.permissions.delete_discussions_label'),
-      permission: 'discussion.hide'
-    }, 90);
+    items.add(
+      'hideDiscussions',
+      {
+        icon: 'far fa-trash-alt',
+        label: app.translator.trans('core.admin.permissions.delete_discussions_label'),
+        permission: 'discussion.hide',
+      },
+      90
+    );
 
-    items.add('deleteDiscussions', {
-      icon: 'fas fa-times',
-      label: app.translator.trans('core.admin.permissions.delete_discussions_forever_label'),
-      permission: 'discussion.delete'
-    }, 80);
+    items.add(
+      'deleteDiscussions',
+      {
+        icon: 'fas fa-times',
+        label: app.translator.trans('core.admin.permissions.delete_discussions_forever_label'),
+        permission: 'discussion.delete',
+      },
+      80
+    );
 
-    items.add('editPosts', {
-      icon: 'fas fa-pencil-alt',
-      label: app.translator.trans('core.admin.permissions.edit_posts_label'),
-      permission: 'discussion.editPosts'
-    }, 70);
+    items.add(
+      'postWithoutThrottle',
+      {
+        icon: 'fas fa-swimmer',
+        label: app.translator.trans('core.admin.permissions.post_without_throttle_label'),
+        permission: 'postWithoutThrottle',
+      },
+      70
+    );
 
-    items.add('hidePosts', {
-      icon: 'far fa-trash-alt',
-      label: app.translator.trans('core.admin.permissions.delete_posts_label'),
-      permission: 'discussion.hidePosts'
-    }, 60);
+    items.add(
+      'editPosts',
+      {
+        icon: 'fas fa-pencil-alt',
+        label: app.translator.trans('core.admin.permissions.edit_posts_label'),
+        permission: 'discussion.editPosts',
+      },
+      70
+    );
 
-    items.add('deletePosts', {
-      icon: 'fas fa-times',
-      label: app.translator.trans('core.admin.permissions.delete_posts_forever_label'),
-      permission: 'discussion.deletePosts'
-    }, 60);
+    items.add(
+      'hidePosts',
+      {
+        icon: 'far fa-trash-alt',
+        label: app.translator.trans('core.admin.permissions.delete_posts_label'),
+        permission: 'discussion.hidePosts',
+      },
+      60
+    );
+
+    items.add(
+      'deletePosts',
+      {
+        icon: 'fas fa-times',
+        label: app.translator.trans('core.admin.permissions.delete_posts_forever_label'),
+        permission: 'discussion.deletePosts',
+      },
+      60
+    );
+
+    items.add(
+      'userEdit',
+      {
+        icon: 'fas fa-user-cog',
+        label: app.translator.trans('core.admin.permissions.edit_users_label'),
+        permission: 'user.edit',
+      },
+      60
+    );
 
-    items.add('userEdit', {
-      icon: 'fas fa-user-cog',
-      label: app.translator.trans('core.admin.permissions.edit_users_label'),
-      permission: 'user.edit'
-    }, 60);
-    
     return items;
   }
 
   scopeItems() {
     const items = new ItemList();
 
-    items.add('global', {
-      label: app.translator.trans('core.admin.permissions.global_heading'),
-      render: item => {
-        if (item.setting) {
-          return item.setting();
-        } else if (item.permission) {
-          return PermissionDropdown.component({
-            permission: item.permission,
-            allowGuest: item.allowGuest
-          });
-        }
+    items.add(
+      'global',
+      {
+        label: app.translator.trans('core.admin.permissions.global_heading'),
+        render: (item) => {
+          if (item.setting) {
+            return item.setting();
+          } else if (item.permission) {
+            return PermissionDropdown.component({
+              permission: item.permission,
+              allowGuest: item.allowGuest,
+            });
+          }
 
-        return '';
-      }
-    }, 100);
+          return '';
+        },
+      },
+      100
+    );
 
     return items;
   }

js/src/admin/components/PermissionsPage.js

@@ -1,4 +1,4 @@
-import Page from './Page';
+import Page from '../../common/components/Page';
 import GroupBadge from '../../common/components/GroupBadge';
 import EditGroupModal from './EditGroupModal';
 import Group from '../../common/models/Group';
@@ -11,29 +11,28 @@ export default class PermissionsPage extends Page {
       <div className="PermissionsPage">
         <div className="PermissionsPage-groups">
           <div className="container">
-            {app.store.all('groups')
-              .filter(group => [Group.GUEST_ID, Group.MEMBER_ID].indexOf(group.id()) === -1)
-              .map(group => (
-                <button className="Button Group" onclick={() => app.modal.show(new EditGroupModal({group}))}>
+            {app.store
+              .all('groups')
+              .filter((group) => [Group.GUEST_ID, Group.MEMBER_ID].indexOf(group.id()) === -1)
+              .map((group) => (
+                <button className="Button Group" onclick={() => app.modal.show(EditGroupModal, { group })}>
                   {GroupBadge.component({
                     group,
                     className: 'Group-icon',
-                    label: null
+                    label: null,
                   })}
                   <span className="Group-name">{group.namePlural()}</span>
                 </button>
               ))}
-            <button className="Button Group Group--add" onclick={() => app.modal.show(new EditGroupModal())}>
-              {icon('fas fa-plus', {className: 'Group-icon'})}
+            <button className="Button Group Group--add" onclick={() => app.modal.show(EditGroupModal)}>
+              {icon('fas fa-plus', { className: 'Group-icon' })}
               <span className="Group-name">{app.translator.trans('core.admin.permissions.new_group_button')}</span>
             </button>
           </div>
         </div>
 
         <div className="PermissionsPage-permissions">
-          <div className="container">
-            {PermissionGrid.component()}
-          </div>
+          <div className="container">{PermissionGrid.component()}</div>
         </div>
       </div>
     );

js/src/admin/components/SessionDropdown.js

@@ -26,10 +26,7 @@ export default class SessionDropdown extends Dropdown {
   getButtonContent() {
     const user = app.session.user;
 
-    return [
-      avatar(user), ' ',
-      <span className="Button-label">{username(user)}</span>
-    ];
+    return [avatar(user), ' ', <span className="Button-label">{username(user)}</span>];
   }
 
   /**
@@ -40,11 +37,12 @@ export default class SessionDropdown extends Dropdown {
   items() {
     const items = new ItemList();
 
-    items.add('logOut',
+    items.add(
+      'logOut',
       Button.component({
         icon: 'fas fa-sign-out-alt',
         children: app.translator.trans('core.admin.header.log_out_button'),
-        onclick: app.session.logout.bind(app.session)
+        onclick: app.session.logout.bind(app.session),
       }),
       -100
     );

js/src/admin/components/SettingDropdown.js

@@ -11,14 +11,14 @@ export default class SettingDropdown extends SelectDropdown {
     props.caretIcon = 'fas fa-caret-down';
     props.defaultLabel = 'Custom';
 
-    props.children = props.options.map(({value, label}) => {
+    props.children = props.options.map(({ value, label }) => {
       const active = app.data.settings[props.key] === value;
 
       return Button.component({
         children: label,
         icon: active ? 'fas fa-check' : true,
-        onclick: saveSettings.bind(this, {[props.key]: value}),
-        active
+        onclick: saveSettings.bind(this, { [props.key]: value }),
+        active,
       });
     });
   }

js/src/admin/components/SettingsModal.js

@@ -18,9 +18,7 @@ export default class SettingsModal extends Modal {
         <div className="Form">
           {this.form()}
 
-          <div className="Form-group">
-            {this.submitButton()}
-          </div>
+          <div className="Form-group">{this.submitButton()}</div>
         </div>
       </div>
     );
@@ -28,11 +26,7 @@ export default class SettingsModal extends Modal {
 
   submitButton() {
     return (
-      <Button
-        type="submit"
-        className="Button Button--primary"
-        loading={this.loading}
-        disabled={!this.changed()}>
+      <Button type="submit" className="Button Button--primary" loading={this.loading} disabled={!this.changed()}>
         {app.translator.trans('core.admin.settings.submit_button')}
       </Button>
     );
@@ -47,7 +41,7 @@ export default class SettingsModal extends Modal {
   dirty() {
     const dirty = {};
 
-    Object.keys(this.settings).forEach(key => {
+    Object.keys(this.settings).forEach((key) => {
       const value = this.settings[key]();
 
       if (value !== app.data.settings[key]) {
@@ -67,10 +61,7 @@ export default class SettingsModal extends Modal {
 
     this.loading = true;
 
-    saveSettings(this.dirty()).then(
-      this.onsaved.bind(this),
-      this.loaded.bind(this)
-    );
+    saveSettings(this.dirty()).then(this.onsaved.bind(this), this.loaded.bind(this));
   }
 
   onsaved() {

js/src/admin/components/StatusWidget.js

@@ -20,39 +20,39 @@ export default class StatusWidget extends DashboardWidget {
   }
 
   content() {
-    return (
-      <ul>{listItems(this.items().toArray())}</ul>
-    );
+    return <ul>{listItems(this.items().toArray())}</ul>;
   }
 
   items() {
     const items = new ItemList();
 
-    items.add('tools', (
+    items.add(
+      'tools',
       <Dropdown
         label={app.translator.trans('core.admin.dashboard.tools_button')}
         icon="fas fa-cog"
         buttonClassName="Button"
-        menuClassName="Dropdown-menu--right">
-        <Button onclick={this.handleClearCache.bind(this)}>
-          {app.translator.trans('core.admin.dashboard.clear_cache_button')}
-        </Button>
+        menuClassName="Dropdown-menu--right"
+      >
+        <Button onclick={this.handleClearCache.bind(this)}>{app.translator.trans('core.admin.dashboard.clear_cache_button')}</Button>
       </Dropdown>
-    ));
+    );
 
-    items.add('version-flarum', [<strong>Flarum</strong>, <br/>, app.forum.attribute('version')]);
-    items.add('version-php', [<strong>PHP</strong>, <br/>, app.data.phpVersion]);
-    items.add('version-mysql', [<strong>MySQL</strong>, <br/>, app.data.mysqlVersion]);
+    items.add('version-flarum', [<strong>Flarum</strong>, <br />, app.forum.attribute('version')]);
+    items.add('version-php', [<strong>PHP</strong>, <br />, app.data.phpVersion]);
+    items.add('version-mysql', [<strong>MySQL</strong>, <br />, app.data.mysqlVersion]);
 
     return items;
   }
 
   handleClearCache(e) {
-    app.modal.show(new LoadingModal());
+    app.modal.show(LoadingModal);
 
-    app.request({
-      method: 'DELETE',
-      url: app.forum.attribute('apiUrl') + '/cache'
-    }).then(() => window.location.reload());
+    app
+      .request({
+        method: 'DELETE',
+        url: app.forum.attribute('apiUrl') + '/cache',
+      })
+      .then(() => window.location.reload());
   }
 }

js/src/admin/components/UploadImageButton.js

@@ -15,7 +15,9 @@ export default class UploadImageButton extends Button {
 
       return (
         <div>
-          <p><img src={app.forum.attribute(this.props.name+'Url')} alt=""/></p>
+          <p>
+            <img src={app.forum.attribute(this.props.name + 'Url')} alt="" />
+          </p>
           <p>{super.view()}</p>
         </div>
       );
@@ -35,23 +37,26 @@ export default class UploadImageButton extends Button {
 
     const $input = $('<input type="file">');
 
-    $input.appendTo('body').hide().click().on('change', e => {
-      const data = new FormData();
-      data.append(this.props.name, $(e.target)[0].files[0]);
+    $input
+      .appendTo('body')
+      .hide()
+      .click()
+      .on('change', (e) => {
+        const data = new FormData();
+        data.append(this.props.name, $(e.target)[0].files[0]);
 
-      this.loading = true;
-      m.redraw();
+        this.loading = true;
+        m.redraw();
 
-      app.request({
-        method: 'POST',
-        url: this.resourceUrl(),
-        serialize: raw => raw,
-        data
-      }).then(
-        this.success.bind(this),
-        this.failure.bind(this)
-      );
-    });
+        app
+          .request({
+            method: 'POST',
+            url: this.resourceUrl(),
+            serialize: (raw) => raw,
+            data,
+          })
+          .then(this.success.bind(this), this.failure.bind(this));
+      });
   }
 
   /**
@@ -61,13 +66,12 @@ export default class UploadImageButton extends Button {
     this.loading = true;
     m.redraw();
 
-    app.request({
-      method: 'DELETE',
-      url: this.resourceUrl()
-    }).then(
-      this.success.bind(this),
-      this.failure.bind(this)
-    );
+    app
+      .request({
+        method: 'DELETE',
+        url: this.resourceUrl(),
+      })
+      .then(this.success.bind(this), this.failure.bind(this));
   }
 
   resourceUrl() {

js/src/admin/components/Widget.js

@@ -1,38 +0,0 @@
-/*
- * This file is part of Flarum.
- *
- * (c) Toby Zerner <toby.zerner@gmail.com>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-import Component from '../../common/Component';
-
-export default class DashboardWidget extends Component {
-  view() {
-    return (
-      <div className={"DashboardWidget "+this.className()}>
-        {this.content()}
-      </div>
-    );
-  }
-
-  /**
-   * Get the class name to apply to the widget.
-   *
-   * @return {String}
-   */
-  className() {
-    return '';
-  }
-
-  /**
-   * Get the content of the widget.
-   *
-   * @return {VirtualElement}
-   */
-  content() {
-    return [];
-  }
-}

js/src/admin/index.js

@@ -9,7 +9,6 @@ export { app };
 
 // Export public API
 
-
 // Export compat API
 import compat from './compat';
 

js/src/admin/routes.js

@@ -10,13 +10,13 @@ import MailPage from './components/MailPage';
  *
  * @param {App} app
  */
-export default function(app) {
+export default function (app) {
   app.routes = {
-    'dashboard': {path: '/', component: DashboardPage.component()},
-    'basics': {path: '/basics', component: BasicsPage.component()},
-    'permissions': {path: '/permissions', component: PermissionsPage.component()},
-    'appearance': {path: '/appearance', component: AppearancePage.component()},
-    'extensions': {path: '/extensions', component: ExtensionsPage.component()},
-    'mail': {path: '/mail', component: MailPage.component()}
+    dashboard: { path: '/', component: DashboardPage.component() },
+    basics: { path: '/basics', component: BasicsPage.component() },
+    permissions: { path: '/permissions', component: PermissionsPage.component() },
+    appearance: { path: '/appearance', component: AppearancePage.component() },
+    extensions: { path: '/extensions', component: ExtensionsPage.component() },
+    mail: { path: '/mail', component: MailPage.component() },
   };
 }

js/src/admin/utils/saveSettings.js

@@ -3,12 +3,14 @@ export default function saveSettings(settings) {
 
   Object.assign(app.data.settings, settings);
 
-  return app.request({
-    method: 'POST',
-    url: app.forum.attribute('apiUrl') + '/settings',
-    data: settings
-  }).catch(error => {
-    app.data.settings = oldSettings;
-    throw error;
-  });
+  return app
+    .request({
+      method: 'POST',
+      url: app.forum.attribute('apiUrl') + '/settings',
+      data: settings,
+    })
+    .catch((error) => {
+      app.data.settings = oldSettings;
+      throw error;
+    });
 }

js/src/common/Application.js

@@ -1,7 +1,8 @@
 import ItemList from './utils/ItemList';
-import Alert from './components/Alert';
+import Button from './components/Button';
 import ModalManager from './components/ModalManager';
 import AlertManager from './components/AlertManager';
+import RequestErrorModal from './components/RequestErrorModal';
 import Translator from './Translator';
 import Store from './Store';
 import Session from './Session';
@@ -10,6 +11,7 @@ import Drawer from './utils/Drawer';
 import mapRoutes from './utils/mapRoutes';
 import RequestError from './utils/RequestError';
 import ScrollListener from './utils/ScrollListener';
+import liveHumanTimes from './utils/liveHumanTimes';
 import { extend } from './extend';
 
 import Forum from './models/Forum';
@@ -19,6 +21,9 @@ import Post from './models/Post';
 import Group from './models/Group';
 import Notification from './models/Notification';
 import { flattenDeep } from 'lodash-es';
+import PageState from './states/PageState';
+import ModalManagerState from './states/ModalManagerState';
+import AlertManagerState from './states/AlertManagerState';
 
 /**
  * The `App` class provides a container for an application, as well as various
@@ -84,7 +89,7 @@ export default class Application {
     discussions: Discussion,
     posts: Post,
     groups: Group,
-    notifications: Notification
+    notifications: Notification,
   });
 
   /**
@@ -105,13 +110,49 @@ export default class Application {
   booted = false;
 
   /**
-   * An Alert that was shown as a result of an AJAX request error. If present,
-   * it will be dismissed on the next successful request.
+   * The key for an Alert that was shown as a result of an AJAX request error.
+   * If present, it will be dismissed on the next successful request.
    *
-   * @type {null|Alert}
+   * @type {int}
    * @private
    */
-  requestError = null;
+  requestErrorAlert = null;
+
+  /**
+   * The page the app is currently on.
+   *
+   * This object holds information about the type of page we are currently
+   * visiting, and sometimes additional arbitrary page state that may be
+   * relevant to lower-level components.
+   *
+   * @type {PageState}
+   */
+  current = new PageState(null);
+
+  /**
+   * The page the app was on before the current page.
+   *
+   * Once the application navigates to another page, the object previously
+   * assigned to this.current will be moved to this.previous, while this.current
+   * is re-initialized.
+   *
+   * @type {PageState}
+   */
+  previous = new PageState(null);
+
+  /*
+   * An object that manages modal state.
+   *
+   * @type {ModalManagerState}
+   */
+  modal = new ModalManagerState();
+
+  /**
+   * An object that manages the state of active alerts.
+   *
+   * @type {AlertManagerState}
+   */
+  alerts = new AlertManagerState();
 
   data;
 
@@ -124,24 +165,21 @@ export default class Application {
   }
 
   boot() {
-    this.initializers.toArray().forEach(initializer => initializer(this));
+    this.initializers.toArray().forEach((initializer) => initializer(this));
 
-    this.store.pushPayload({data: this.data.resources});
+    this.store.pushPayload({ data: this.data.resources });
 
     this.forum = this.store.getById('forums', 1);
 
-    this.session = new Session(
-        this.store.getById('users', this.data.session.userId),
-        this.data.session.csrfToken
-    );
+    this.session = new Session(this.store.getById('users', this.data.session.userId), this.data.session.csrfToken);
 
     this.mount();
   }
 
   bootExtensions(extensions) {
-    Object.keys(extensions).forEach(name => {
+    Object.keys(extensions).forEach((name) => {
       const extension = extensions[name];
-      
+
       const extenders = flattenDeep(extension.extend);
 
       for (const extender of extenders) {
@@ -151,31 +189,27 @@ export default class Application {
   }
 
   mount(basePath = '') {
-    this.modal = m.mount(document.getElementById('modal'), <ModalManager/>);
-    this.alerts = m.mount(document.getElementById('alerts'), <AlertManager/>);
+    m.mount(document.getElementById('modal'), <ModalManager state={this.modal} />);
+    m.mount(document.getElementById('alerts'), <AlertManager state={this.alerts} />);
 
     this.drawer = new Drawer();
 
-    m.route(
-      document.getElementById('content'),
-      basePath + '/',
-      mapRoutes(this.routes, basePath)
-    );
+    m.route(document.getElementById('content'), basePath + '/', mapRoutes(this.routes, basePath));
 
     // Add a class to the body which indicates that the page has been scrolled
     // down.
-    new ScrollListener(top => {
+    new ScrollListener((top) => {
       const $app = $('#app');
       const offset = $app.offset().top;
 
-      $app
-        .toggleClass('affix', top >= offset)
-        .toggleClass('scrolled', top > offset);
+      $app.toggleClass('affix', top >= offset).toggleClass('scrolled', top > offset);
     }).start();
 
     $(() => {
       $('body').addClass('ontouchstart' in window ? 'touch' : 'no-touch');
     });
+
+    liveHumanTimes();
   }
 
   /**
@@ -196,6 +230,16 @@ export default class Application {
     return null;
   }
 
+  /**
+   * Determine the current screen mode, based on our media queries.
+   *
+   * @returns {String} - one of "phone", "tablet", "desktop" or "desktop-hd"
+   */
+  screen() {
+    const styles = getComputedStyle(document.documentElement);
+    return styles.getPropertyValue('--flarum-screen');
+  }
+
   /**
    * Set the <title> of the page.
    *
@@ -218,9 +262,10 @@ export default class Application {
   }
 
   updateTitle() {
-    document.title = (this.titleCount ? `(${this.titleCount}) ` : '') +
-      (this.title ? this.title + ' - ' : '') +
-      this.forum.attribute('title');
+    const count = this.titleCount ? `(${this.titleCount}) ` : '';
+    const pageTitleWithSeparator = this.title && m.route() !== '/' ? this.title + ' - ' : '';
+    const title = this.forum.attribute('title');
+    document.title = count + pageTitleWithSeparator + title;
   }
 
   /**
@@ -254,17 +299,19 @@ export default class Application {
     // When we deserialize JSON data, if for some reason the server has provided
     // a dud response, we don't want the application to crash. We'll show an
     // error message to the user instead.
-    options.deserialize = options.deserialize || (responseText => responseText);
+    options.deserialize = options.deserialize || ((responseText) => responseText);
 
-    options.errorHandler = options.errorHandler || (error => {
-      throw error;
-    });
+    options.errorHandler =
+      options.errorHandler ||
+      ((error) => {
+        throw error;
+      });
 
     // When extracting the data from the response, we can check the server
     // response code and show an error message to the user if something's gone
     // awry.
     const original = options.extract;
-    options.extract = xhr => {
+    options.extract = (xhr) => {
       let responseText;
 
       if (original) {
@@ -291,60 +338,93 @@ export default class Application {
       }
     };
 
-    if (this.requestError) this.alerts.dismiss(this.requestError.alert);
+    if (this.requestErrorAlert) this.alerts.dismiss(this.requestErrorAlert);
 
     // Now make the request. If it's a failure, inspect the error that was
     // returned and show an alert containing its contents.
     const deferred = m.deferred();
 
-    m.request(options).then(response => deferred.resolve(response), error => {
-      this.requestError = error;
+    m.request(options).then(
+      (response) => deferred.resolve(response),
+      (error) => {
+        let children;
 
-      let children;
+        switch (error.status) {
+          case 422:
+            children = error.response.errors
+              .map((error) => [error.detail, <br />])
+              .reduce((a, b) => a.concat(b), [])
+              .slice(0, -1);
+            break;
 
-      switch (error.status) {
-        case 422:
-          children = error.response.errors
-            .map(error => [error.detail, <br/>])
-            .reduce((a, b) => a.concat(b), [])
-            .slice(0, -1);
-          break;
+          case 401:
+          case 403:
+            children = app.translator.trans('core.lib.error.permission_denied_message');
+            break;
 
-        case 401:
-        case 403:
-          children = app.translator.trans('core.lib.error.permission_denied_message');
-          break;
+          case 404:
+          case 410:
+            children = app.translator.trans('core.lib.error.not_found_message');
+            break;
 
-        case 404:
-        case 410:
-          children = app.translator.trans('core.lib.error.not_found_message');
-          break;
+          case 429:
+            children = app.translator.trans('core.lib.error.rate_limit_exceeded_message');
+            break;
 
-        case 429:
-          children = app.translator.trans('core.lib.error.rate_limit_exceeded_message');
-          break;
+          default:
+            children = app.translator.trans('core.lib.error.generic_message');
+        }
 
-        default:
-          children = app.translator.trans('core.lib.error.generic_message');
+        const isDebug = app.forum.attribute('debug');
+        // contains a formatted errors if possible, response must be an JSON API array of errors
+        // the details property is decoded to transform escaped characters such as '\n'
+        const formattedError = error.response && Array.isArray(error.response.errors) && error.response.errors.map((e) => decodeURI(e.detail));
+
+        error.alert = {
+          type: 'error',
+          children,
+          controls: isDebug && [
+            <Button className="Button Button--link" onclick={this.showDebug.bind(this, error, formattedError)}>
+              Debug
+            </Button>,
+          ],
+        };
+
+        try {
+          options.errorHandler(error);
+        } catch (error) {
+          if (isDebug && error.xhr) {
+            const { method, url } = error.options;
+            const { status = '' } = error.xhr;
+
+            console.group(`${method} ${url} ${status}`);
+
+            console.error(...(formattedError || [error]));
+
+            console.groupEnd();
+          }
+
+          this.requestErrorAlert = this.alerts.show(error.alert);
+        }
+
+        deferred.reject(error);
       }
-
-      error.alert = new Alert({
-        type: 'error',
-        children
-      });
-
-      try {
-        options.errorHandler(error);
-      } catch (error) {
-        this.alerts.show(error.alert);
-      }
-
-      deferred.reject(error);
-    });
+    );
 
     return deferred.promise;
   }
 
+  /**
+   * @param {RequestError} error
+   * @param {string[]} [formattedError]
+   * @private
+   */
+  showDebug(error, formattedError) {
+    this.alerts.dismiss(this.requestErrorAlert);
+
+    this.modal.show(RequestErrorModal, { error, formattedError });
+  }
+
   /**
    * Construct a URL to the route with the given name.
    *

js/src/common/Component.js

@@ -70,8 +70,7 @@ export default class Component {
    *
    * @protected
    */
-  init() {
-  }
+  init() {}
 
   /**
    * Called when the component is destroyed, i.e. after a redraw where it is no
@@ -81,8 +80,7 @@ export default class Component {
    * @param {Object} e
    * @public
    */
-  onunload() {
-  }
+  onunload() {}
 
   /**
    * Get the renderable virtual DOM that represents the component's view.
@@ -99,7 +97,7 @@ export default class Component {
    * @public
    */
   render() {
-    const vdom = this.retain ? {subtree: 'retain'} : this.view();
+    const vdom = this.retain ? { subtree: 'retain' } : this.view();
 
     // Override the root element's config attribute with our own function, which
     // will set the component instance's element property to the root DOM
@@ -148,8 +146,7 @@ export default class Component {
    * @param {Object} vdom
    * @public
    */
-  config() {
-  }
+  config() {}
 
   /**
    * Get the virtual DOM that represents the component's view.
@@ -201,14 +198,14 @@ export default class Component {
       controller: this.bind(undefined, componentProps),
       view: view,
       props: componentProps,
-      component: this
+      component: this,
     };
 
     // If a `key` prop was set, then we'll assume that we want that to actually
     // show up as an attribute on the component object so that Mithril's key
     // algorithm can be applied.
     if (componentProps.key) {
-      output.attrs = {key: componentProps.key};
+      output.attrs = { key: componentProps.key };
     }
 
     return output;
@@ -220,6 +217,5 @@ export default class Component {
    * @param {Object} props
    * @public
    */
-  static initProps(props) {
-  }
+  static initProps(props) {}
 }

js/src/common/Model.js

@@ -88,7 +88,7 @@ export default class Model {
         // relationship data object.
         for (const innerKey in data[key]) {
           if (data[key][innerKey] instanceof Model) {
-            data[key][innerKey] = {data: Model.getIdentifier(data[key][innerKey])};
+            data[key][innerKey] = { data: Model.getIdentifier(data[key][innerKey]) };
           }
           this.data[key][innerKey] = data[key][innerKey];
         }
@@ -109,7 +109,7 @@ export default class Model {
    * @public
    */
   pushAttributes(attributes) {
-    this.pushData({attributes});
+    this.pushData({ attributes });
   }
 
   /**
@@ -125,7 +125,7 @@ export default class Model {
     const data = {
       type: this.data.type,
       id: this.data.id,
-      attributes
+      attributes,
     };
 
     // If a 'relationships' key exists, extract it from the attributes hash and
@@ -138,9 +138,7 @@ export default class Model {
         const model = attributes.relationships[key];
 
         data.relationships[key] = {
-          data: model instanceof Array
-            ? model.map(Model.getIdentifier)
-            : Model.getIdentifier(model)
+          data: model instanceof Array ? model.map(Model.getIdentifier) : Model.getIdentifier(model),
         };
       }
 
@@ -154,31 +152,38 @@ export default class Model {
 
     this.pushData(data);
 
-    const request = {data};
+    const request = { data };
     if (options.meta) request.meta = options.meta;
 
-    return app.request(Object.assign({
-      method: this.exists ? 'PATCH' : 'POST',
-      url: app.forum.attribute('apiUrl') + this.apiEndpoint(),
-      data: request
-    }, options)).then(
-      // If everything went well, we'll make sure the store knows that this
-      // model exists now (if it didn't already), and we'll push the data that
-      // the API returned into the store.
-      payload => {
-        this.store.data[payload.data.type] = this.store.data[payload.data.type] || {};
-        this.store.data[payload.data.type][payload.data.id] = this;
-        return this.store.pushPayload(payload);
-      },
+    return app
+      .request(
+        Object.assign(
+          {
+            method: this.exists ? 'PATCH' : 'POST',
+            url: app.forum.attribute('apiUrl') + this.apiEndpoint(),
+            data: request,
+          },
+          options
+        )
+      )
+      .then(
+        // If everything went well, we'll make sure the store knows that this
+        // model exists now (if it didn't already), and we'll push the data that
+        // the API returned into the store.
+        (payload) => {
+          this.store.data[payload.data.type] = this.store.data[payload.data.type] || {};
+          this.store.data[payload.data.type][payload.data.id] = this;
+          return this.store.pushPayload(payload);
+        },
 
-      // If something went wrong, though... good thing we backed up our model's
-      // old data! We'll revert to that and let others handle the error.
-      response => {
-        this.pushData(oldData);
-        m.lazyRedraw();
-        throw response;
-      }
-    );
+        // If something went wrong, though... good thing we backed up our model's
+        // old data! We'll revert to that and let others handle the error.
+        (response) => {
+          this.pushData(oldData);
+          m.lazyRedraw();
+          throw response;
+        }
+      );
   }
 
   /**
@@ -192,14 +197,21 @@ export default class Model {
   delete(data, options = {}) {
     if (!this.exists) return m.deferred().resolve().promise;
 
-    return app.request(Object.assign({
-      method: 'DELETE',
-      url: app.forum.attribute('apiUrl') + this.apiEndpoint(),
-      data
-    }, options)).then(() => {
-      this.exists = false;
-      this.store.remove(this);
-    });
+    return app
+      .request(
+        Object.assign(
+          {
+            method: 'DELETE',
+            url: app.forum.attribute('apiUrl') + this.apiEndpoint(),
+            data,
+          },
+          options
+        )
+      )
+      .then(() => {
+        this.exists = false;
+        this.store.remove(this);
+      });
   }
 
   /**
@@ -225,7 +237,7 @@ export default class Model {
    * @public
    */
   static attribute(name, transform) {
-    return function() {
+    return function () {
       const value = this.data.attributes && this.data.attributes[name];
 
       return transform ? transform(value) : value;
@@ -243,7 +255,7 @@ export default class Model {
    * @public
    */
   static hasOne(name) {
-    return function() {
+    return function () {
       if (this.data.relationships) {
         const relationship = this.data.relationships[name];
 
@@ -267,12 +279,12 @@ export default class Model {
    * @public
    */
   static hasMany(name) {
-    return function() {
+    return function () {
       if (this.data.relationships) {
         const relationship = this.data.relationships[name];
 
         if (relationship) {
-          return relationship.data.map(data => app.store.getById(data.type, data.id));
+          return relationship.data.map((data) => app.store.getById(data.type, data.id));
         }
       }
 
@@ -301,7 +313,7 @@ export default class Model {
   static getIdentifier(model) {
     return {
       type: model.data.type,
-      id: model.data.id
+      id: model.data.id,
     };
   }
 }

js/src/common/Session.js

@@ -31,11 +31,16 @@ export default class Session {
    * @public
    */
   login(data, options = {}) {
-    return app.request(Object.assign({
-      method: 'POST',
-      url: app.forum.attribute('baseUrl') + '/login',
-      data
-    }, options));
+    return app.request(
+      Object.assign(
+        {
+          method: 'POST',
+          url: app.forum.attribute('baseUrl') + '/login',
+          data,
+        },
+        options
+      )
+    );
   }
 
   /**

js/src/common/Store.js

@@ -34,9 +34,7 @@ export default class Store {
   pushPayload(payload) {
     if (payload.included) payload.included.map(this.pushObject.bind(this));
 
-    const result = payload.data instanceof Array
-      ? payload.data.map(this.pushObject.bind(this))
-      : this.pushObject(payload.data);
+    const result = payload.data instanceof Array ? payload.data.map(this.pushObject.bind(this)) : this.pushObject(payload.data);
 
     // Attach the original payload to the model that we give back. This is
     // useful to consumers as it allows them to access meta information
@@ -58,7 +56,7 @@ export default class Store {
   pushObject(data) {
     if (!this.models[data.type]) return null;
 
-    const type = this.data[data.type] = this.data[data.type] || {};
+    const type = (this.data[data.type] = this.data[data.type] || {});
 
     if (type[data.id]) {
       type[data.id].pushData(data);
@@ -95,11 +93,18 @@ export default class Store {
       url += '/' + id;
     }
 
-    return app.request(Object.assign({
-      method: 'GET',
-      url,
-      data
-    }, options)).then(this.pushPayload.bind(this));
+    return app
+      .request(
+        Object.assign(
+          {
+            method: 'GET',
+            url,
+            data,
+          },
+          options
+        )
+      )
+      .then(this.pushPayload.bind(this));
   }
 
   /**
@@ -124,7 +129,7 @@ export default class Store {
    * @public
    */
   getBy(type, key, value) {
-    return this.all(type).filter(model => model[key]() === value)[0];
+    return this.all(type).filter((model) => model[key]() === value)[0];
   }
 
   /**
@@ -137,7 +142,7 @@ export default class Store {
   all(type) {
     const records = this.data[type];
 
-    return records ? Object.keys(records).map(id => records[id]) : [];
+    return records ? Object.keys(records).map((id) => records[id]) : [];
   }
 
   /**
@@ -160,6 +165,6 @@ export default class Store {
   createRecord(type, data = {}) {
     data.type = data.type || type;
 
-    return new (this.models[type])(data, this);
+    return new this.models[type](data, this);
   }
 }

js/src/common/Translator.js

@@ -67,7 +67,7 @@ export default class Translator {
     const hydrated = [];
     const open = [hydrated];
 
-    translation.forEach(part => {
+    translation.forEach((part) => {
       const match = part.match(new RegExp('{([a-z0-9_]+)}|<(/?)([a-z0-9_]+)>', 'i'));
 
       if (match) {
@@ -77,7 +77,7 @@ export default class Translator {
           if (match[2]) {
             open.shift();
           } else {
-            let tag = input[match[3]] || {tag: match[3], children: []};
+            let tag = input[match[3]] || { tag: match[3], children: [] };
             open[0].push(tag);
             open.unshift(tag.children || tag);
           }
@@ -87,7 +87,7 @@ export default class Translator {
       }
     });
 
-    return hydrated.filter(part => part);
+    return hydrated.filter((part) => part);
   }
 
   pluralize(translation, number) {
@@ -97,7 +97,7 @@ export default class Translator {
       standardRules = [],
       explicitRules = [];
 
-    translation.split('|').forEach(part => {
+    translation.split('|').forEach((part) => {
       if (cPluralRegex.test(part)) {
         const matches = part.match(cPluralRegex);
         explicitRules[matches[0]] = matches[matches.length - 1];
@@ -122,11 +122,13 @@ export default class Translator {
             }
           }
         } else {
-          var leftNumber  = this.convertNumber(matches[4]);
+          var leftNumber = this.convertNumber(matches[4]);
           var rightNumber = this.convertNumber(matches[5]);
 
-          if (('[' === matches[3] ? number >= leftNumber : number > leftNumber) &&
-            (']' === matches[6] ? number <= rightNumber : number < rightNumber)) {
+          if (
+            ('[' === matches[3] ? number >= leftNumber : number > leftNumber) &&
+            (']' === matches[6] ? number <= rightNumber : number < rightNumber)
+          ) {
             return explicitRules[e];
           }
         }
@@ -223,7 +225,7 @@ export default class Translator {
       case 'tr':
       case 'ur':
       case 'zu':
-        return (number == 1) ? 0 : 1;
+        return number == 1 ? 0 : 1;
 
       case 'am':
       case 'bh':
@@ -237,7 +239,7 @@ export default class Translator {
       case 'xbr':
       case 'ti':
       case 'wa':
-        return ((number === 0) || (number == 1)) ? 0 : 1;
+        return number === 0 || number == 1 ? 0 : 1;
 
       case 'be':
       case 'bs':
@@ -245,41 +247,41 @@ export default class Translator {
       case 'ru':
       case 'sr':
       case 'uk':
-        return ((number % 10 == 1) && (number % 100 != 11)) ? 0 : (((number % 10 >= 2) && (number % 10 <= 4) && ((number % 100 < 10) || (number % 100 >= 20))) ? 1 : 2);
+        return number % 10 == 1 && number % 100 != 11 ? 0 : number % 10 >= 2 && number % 10 <= 4 && (number % 100 < 10 || number % 100 >= 20) ? 1 : 2;
 
       case 'cs':
       case 'sk':
-        return (number == 1) ? 0 : (((number >= 2) && (number <= 4)) ? 1 : 2);
+        return number == 1 ? 0 : number >= 2 && number <= 4 ? 1 : 2;
 
       case 'ga':
-        return (number == 1) ? 0 : ((number == 2) ? 1 : 2);
+        return number == 1 ? 0 : number == 2 ? 1 : 2;
 
       case 'lt':
-        return ((number % 10 == 1) && (number % 100 != 11)) ? 0 : (((number % 10 >= 2) && ((number % 100 < 10) || (number % 100 >= 20))) ? 1 : 2);
+        return number % 10 == 1 && number % 100 != 11 ? 0 : number % 10 >= 2 && (number % 100 < 10 || number % 100 >= 20) ? 1 : 2;
 
       case 'sl':
-        return (number % 100 == 1) ? 0 : ((number % 100 == 2) ? 1 : (((number % 100 == 3) || (number % 100 == 4)) ? 2 : 3));
+        return number % 100 == 1 ? 0 : number % 100 == 2 ? 1 : number % 100 == 3 || number % 100 == 4 ? 2 : 3;
 
       case 'mk':
-        return (number % 10 == 1) ? 0 : 1;
+        return number % 10 == 1 ? 0 : 1;
 
       case 'mt':
-        return (number == 1) ? 0 : (((number === 0) || ((number % 100 > 1) && (number % 100 < 11))) ? 1 : (((number % 100 > 10) && (number % 100 < 20)) ? 2 : 3));
+        return number == 1 ? 0 : number === 0 || (number % 100 > 1 && number % 100 < 11) ? 1 : number % 100 > 10 && number % 100 < 20 ? 2 : 3;
 
       case 'lv':
-        return (number === 0) ? 0 : (((number % 10 == 1) && (number % 100 != 11)) ? 1 : 2);
+        return number === 0 ? 0 : number % 10 == 1 && number % 100 != 11 ? 1 : 2;
 
       case 'pl':
-        return (number == 1) ? 0 : (((number % 10 >= 2) && (number % 10 <= 4) && ((number % 100 < 12) || (number % 100 > 14))) ? 1 : 2);
+        return number == 1 ? 0 : number % 10 >= 2 && number % 10 <= 4 && (number % 100 < 12 || number % 100 > 14) ? 1 : 2;
 
       case 'cy':
-        return (number == 1) ? 0 : ((number == 2) ? 1 : (((number == 8) || (number == 11)) ? 2 : 3));
+        return number == 1 ? 0 : number == 2 ? 1 : number == 8 || number == 11 ? 2 : 3;
 
       case 'ro':
-        return (number == 1) ? 0 : (((number === 0) || ((number % 100 > 0) && (number % 100 < 20))) ? 1 : 2);
+        return number == 1 ? 0 : number === 0 || (number % 100 > 0 && number % 100 < 20) ? 1 : 2;
 
       case 'ar':
-        return (number === 0) ? 0 : ((number == 1) ? 1 : ((number == 2) ? 2 : (((number >= 3) && (number <= 10)) ? 3 : (((number >= 11) && (number <= 99)) ? 4 : 5))));
+        return number === 0 ? 0 : number == 1 ? 1 : number == 2 ? 2 : number >= 3 && number <= 10 ? 3 : number >= 11 && number <= 99 ? 4 : 5;
 
       default:
         return 0;

js/src/common/compat.js

@@ -30,6 +30,7 @@ import Forum from './models/Forum';
 import Component from './Component';
 import Translator from './Translator';
 import AlertManager from './components/AlertManager';
+import Page from './components/Page';
 import Switch from './components/Switch';
 import Badge from './components/Badge';
 import LoadingIndicator from './components/LoadingIndicator';
@@ -37,6 +38,7 @@ import Placeholder from './components/Placeholder';
 import Separator from './components/Separator';
 import Dropdown from './components/Dropdown';
 import SplitDropdown from './components/SplitDropdown';
+import RequestErrorModal from './components/RequestErrorModal';
 import FieldSet from './components/FieldSet';
 import Select from './components/Select';
 import Navigation from './components/Navigation';
@@ -61,9 +63,9 @@ import userOnline from './helpers/userOnline';
 import listItems from './helpers/listItems';
 
 export default {
-  'extend': extend,
-  'Session': Session,
-  'Store': Store,
+  extend: extend,
+  Session: Session,
+  Store: Store,
   'utils/evented': evented,
   'utils/liveHumanTimes': liveHumanTimes,
   'utils/ItemList': ItemList,
@@ -90,9 +92,10 @@ export default {
   'models/Discussion': Discussion,
   'models/Group': Group,
   'models/Forum': Forum,
-  'Component': Component,
-  'Translator': Translator,
+  Component: Component,
+  Translator: Translator,
   'components/AlertManager': AlertManager,
+  'components/Page': Page,
   'components/Switch': Switch,
   'components/Badge': Badge,
   'components/LoadingIndicator': LoadingIndicator,
@@ -100,6 +103,7 @@ export default {
   'components/Separator': Separator,
   'components/Dropdown': Dropdown,
   'components/SplitDropdown': SplitDropdown,
+  'components/RequestErrorModal': RequestErrorModal,
   'components/FieldSet': FieldSet,
   'components/Select': Select,
   'components/Navigation': Navigation,
@@ -111,8 +115,8 @@ export default {
   'components/Button': Button,
   'components/Modal': Modal,
   'components/GroupBadge': GroupBadge,
-  'Model': Model,
-  'Application': Application,
+  Model: Model,
+  Application: Application,
   'helpers/fullTime': fullTime,
   'helpers/avatar': avatar,
   'helpers/icon': icon,
@@ -121,5 +125,5 @@ export default {
   'helpers/highlight': highlight,
   'helpers/username': username,
   'helpers/userOnline': userOnline,
-  'helpers/listItems': listItems
+  'helpers/listItems': listItems,
 };

js/src/common/components/Alert.js

@@ -35,22 +35,13 @@ export default class Alert extends Component {
     const dismissControl = [];
 
     if (dismissible || dismissible === undefined) {
-      dismissControl.push(
-        <Button
-          icon="fas fa-times"
-          className="Button Button--link Button--icon Alert-dismiss"
-          onclick={ondismiss}/>
-      );
+      dismissControl.push(<Button icon="fas fa-times" className="Button Button--link Button--icon Alert-dismiss" onclick={ondismiss} />);
     }
 
     return (
       <div {...attrs}>
-        <span className="Alert-body">
-          {children}
-        </span>
-        <ul className="Alert-controls">
-          {listItems(controls.concat(dismissControl))}
-        </ul>
+        <span className="Alert-body">{children}</span>
+        <ul className="Alert-controls">{listItems(controls.concat(dismissControl))}</ul>
       </div>
     );
   }

js/src/common/components/AlertManager.js

@@ -7,19 +7,17 @@ import Alert from './Alert';
  */
 export default class AlertManager extends Component {
   init() {
-    /**
-     * An array of Alert components which are currently showing.
-     *
-     * @type {Alert[]}
-     * @protected
-     */
-    this.components = [];
+    this.state = this.props.state;
   }
 
   view() {
     return (
       <div className="AlertManager">
-        {this.components.map(component => <div className="AlertManager-alert">{component}</div>)}
+        {Object.entries(this.state.getActiveAlerts()).map(([key, alert]) => (
+          <div className="AlertManager-alert">
+            {(alert.componentClass || Alert).component({ ...alert.attrs, ondismiss: this.state.dismiss.bind(this.state, key) })}
+          </div>
+        ))}
       </div>
     );
   }
@@ -30,46 +28,4 @@ export default class AlertManager extends Component {
     // to be retained across route changes.
     context.retain = true;
   }
-
-  /**
-   * Show an Alert in the alerts area.
-   *
-   * @param {Alert} component
-   * @public
-   */
-  show(component) {
-    if (!(component instanceof Alert)) {
-      throw new Error('The AlertManager component can only show Alert components');
-    }
-
-    component.props.ondismiss = this.dismiss.bind(this, component);
-
-    this.components.push(component);
-    m.redraw();
-  }
-
-  /**
-   * Dismiss an alert.
-   *
-   * @param {Alert} component
-   * @public
-   */
-  dismiss(component) {
-    const index = this.components.indexOf(component);
-
-    if (index !== -1) {
-      this.components.splice(index, 1);
-      m.redraw();
-    }
-  }
-
-  /**
-   * Clear all alerts.
-   *
-   * @public
-   */
-  clear() {
-    this.components = [];
-    m.redraw();
-  }
 }

js/src/common/components/Badge.js

@@ -24,16 +24,12 @@ export default class Badge extends Component {
     attrs.className = 'Badge ' + (type ? 'Badge--' + type : '') + ' ' + (attrs.className || '');
     attrs.title = extract(attrs, 'label') || '';
 
-    return (
-      <span {...attrs}>
-        {iconName ? icon(iconName, {className: 'Badge-icon'}) : m.trust('&nbsp;')}
-      </span>
-    );
+    return <span {...attrs}>{iconName ? icon(iconName, { className: 'Badge-icon' }) : m.trust('&nbsp;')}</span>;
   }
 
   config(isInitialized) {
     if (isInitialized) return;
 
-    if (this.props.label) this.$().tooltip({container: 'body'});
+    if (this.props.label) this.$().tooltip();
   }
 }

js/src/common/components/Button.js

@@ -62,9 +62,9 @@ export default class Button extends Component {
     const iconName = this.props.icon;
 
     return [
-      iconName && iconName !== true ? icon(iconName, {className: 'Button-icon'}) : '',
+      iconName && iconName !== true ? icon(iconName, { className: 'Button-icon' }) : '',
       this.props.children ? <span className="Button-label">{this.props.children}</span> : '',
-      this.props.loading ? LoadingIndicator.component({size: 'tiny', className: 'LoadingIndicator--inline'}) : ''
+      this.props.loading ? LoadingIndicator.component({ size: 'tiny', className: 'LoadingIndicator--inline' }) : '',
     ];
   }
 }

js/src/common/components/Checkbox.js

@@ -10,34 +10,23 @@ import icon from '../helpers/icon';
  * - `state` Whether or not the checkbox is checked.
  * - `className` The class name for the root element.
  * - `disabled` Whether or not the checkbox is disabled.
+ * - `loading` Whether or not the checkbox is loading.
  * - `onchange` A callback to run when the checkbox is checked/unchecked.
  * - `children` A text label to display next to the checkbox.
  */
 export default class Checkbox extends Component {
-  init() {
-    /**
-     * Whether or not the checkbox's value is in the process of being saved.
-     *
-     * @type {Boolean}
-     * @public
-     */
-    this.loading = false;
-  }
-
   view() {
+    // Sometimes, false is stored in the DB as '0'. This is a temporary
+    // conversion layer until a more robust settings encoding is introduced
+    if (this.props.state === '0') this.props.state = false;
     let className = 'Checkbox ' + (this.props.state ? 'on' : 'off') + ' ' + (this.props.className || '');
-    if (this.loading) className += ' loading';
+    if (this.props.loading) className += ' loading';
     if (this.props.disabled) className += ' disabled';
 
     return (
       <label className={className}>
-        <input type="checkbox"
-          checked={this.props.state}
-          disabled={this.props.disabled}
-          onchange={m.withAttr('checked', this.onchange.bind(this))}/>
-        <div className="Checkbox-display">
-          {this.getDisplay()}
-        </div>
+        <input type="checkbox" checked={this.props.state} disabled={this.props.disabled} onchange={m.withAttr('checked', this.onchange.bind(this))} />
+        <div className="Checkbox-display">{this.getDisplay()}</div>
         {this.props.children}
       </label>
     );
@@ -50,9 +39,7 @@ export default class Checkbox extends Component {
    * @protected
    */
   getDisplay() {
-    return this.loading
-      ? LoadingIndicator.component({size: 'tiny'})
-      : icon(this.props.state ? 'fas fa-check' : 'fas fa-times');
+    return this.props.loading ? LoadingIndicator.component({ size: 'tiny' }) : icon(this.props.state ? 'fas fa-check' : 'fas fa-times');
   }
 
   /**

js/src/common/components/ConfirmDocumentUnload.js

@@ -0,0 +1,37 @@
+import Component from '../Component';
+
+/**
+ * The `ConfirmDocumentUnload` component can be used to register a global
+ * event handler that prevents closing the browser window/tab based on the
+ * return value of a given callback prop.
+ *
+ * ### Props
+ *
+ * - `when` - a callback returning true when the browser should prompt for
+ *            confirmation before closing the window/tab
+ *
+ * ### Children
+ *
+ * NOTE: Only the first child will be rendered. (Use this component to wrap
+ * another component / DOM element.)
+ *
+ */
+export default class ConfirmDocumentUnload extends Component {
+  config(isInitialized, context) {
+    if (isInitialized) return;
+
+    const handler = () => this.props.when() || undefined;
+
+    $(window).on('beforeunload', handler);
+
+    context.onunload = () => {
+      $(window).off('beforeunload', handler);
+    };
+  }
+
+  view() {
+    // To avoid having to render another wrapping <div> here, we assume that
+    // this component is only wrapped around a single element / component.
+    return this.props.children[0];
+  }
+}

js/src/common/components/Dropdown.js

@@ -64,19 +64,13 @@ export default class Dropdown extends Component {
 
       $menu.removeClass('Dropdown-menu--top Dropdown-menu--right');
 
-      $menu.toggleClass(
-        'Dropdown-menu--top',
-        $menu.offset().top + $menu.height() > $(window).scrollTop() + $(window).height()
-      );
+      $menu.toggleClass('Dropdown-menu--top', $menu.offset().top + $menu.height() > $(window).scrollTop() + $(window).height());
 
       if ($menu.offset().top < 0) {
         $menu.removeClass('Dropdown-menu--top');
       }
 
-      $menu.toggleClass(
-        'Dropdown-menu--right',
-        isRight || $menu.offset().left + $menu.width() > $(window).scrollLeft() + $(window).width()
-      );
+      $menu.toggleClass('Dropdown-menu--right', isRight || $menu.offset().left + $menu.width() > $(window).scrollLeft() + $(window).width());
     });
 
     this.$().on('hidden.bs.dropdown', () => {
@@ -98,10 +92,7 @@ export default class Dropdown extends Component {
    */
   getButton() {
     return (
-      <button
-        className={'Dropdown-toggle ' + this.props.buttonClassName}
-        data-toggle="dropdown"
-        onclick={this.props.onclick}>
+      <button className={'Dropdown-toggle ' + this.props.buttonClassName} data-toggle="dropdown" onclick={this.props.onclick}>
         {this.getButtonContent()}
       </button>
     );
@@ -115,17 +106,13 @@ export default class Dropdown extends Component {
    */
   getButtonContent() {
     return [
-      this.props.icon ? icon(this.props.icon, {className: 'Button-icon'}) : '',
+      this.props.icon ? icon(this.props.icon, { className: 'Button-icon' }) : '',
       <span className="Button-label">{this.props.label}</span>,
-      this.props.caretIcon ? icon(this.props.caretIcon, {className: 'Button-caret'}) : ''
+      this.props.caretIcon ? icon(this.props.caretIcon, { className: 'Button-caret' }) : '',
     ];
   }
 
   getMenu(items) {
-    return (
-      <ul className={'Dropdown-menu dropdown-menu ' + this.props.menuClassName}>
-        {items}
-      </ul>
-    );
+    return <ul className={'Dropdown-menu dropdown-menu ' + this.props.menuClassName}>{items}</ul>;
   }
 }

js/src/common/components/GroupBadge.js

@@ -6,7 +6,7 @@ export default class GroupBadge extends Badge {
 
     if (props.group) {
       props.icon = props.group.icon();
-      props.style = {backgroundColor: props.group.color()};
+      props.style = { backgroundColor: props.group.color() };
       props.label = typeof props.label === 'undefined' ? props.group.nameSingular() : props.label;
       props.type = 'group--' + props.group.id();
 

js/src/common/components/LinkButton.js

@@ -33,8 +33,6 @@ export default class LinkButton extends Button {
    * @return {Boolean}
    */
   static isActive(props) {
-    return typeof props.active !== 'undefined'
-      ? props.active
-      : m.route() === props.href;
+    return typeof props.active !== 'undefined' ? props.active : m.route() === props.href;
   }
 }

js/src/common/components/Modal.js

@@ -9,39 +9,56 @@ import Button from './Button';
  * @abstract
  */
 export default class Modal extends Component {
+  /**
+   * Determine whether or not the modal should be dismissible via an 'x' button.
+   */
+  static isDismissible = true;
+
   init() {
     /**
-     * An alert component to show below the header.
+     * Attributes for an alert component to show below the header.
      *
-     * @type {Alert}
+     * @type {object}
      */
-    this.alert = null;
+    this.alertAttrs = null;
+  }
+
+  config(isInitialized, context) {
+    if (isInitialized) return;
+
+    this.props.onshow(() => this.onready());
+
+    context.onunload = () => {
+      this.props.onhide();
+    };
   }
 
   view() {
-    if (this.alert) {
-      this.alert.props.dismissible = false;
+    if (this.alertAttrs) {
+      this.alertAttrs.dismissible = false;
     }
 
     return (
       <div className={'Modal modal-dialog ' + this.className()}>
         <div className="Modal-content">
-          {this.isDismissible() ? (
+          {this.constructor.isDismissible ? (
             <div className="Modal-close App-backControl">
               {Button.component({
                 icon: 'fas fa-times',
                 onclick: this.hide.bind(this),
-                className: 'Button Button--icon Button--link'
+                className: 'Button Button--icon Button--link',
               })}
             </div>
-          ) : ''}
+          ) : (
+            ''
+          )}
 
           <form onsubmit={this.onsubmit.bind(this)}>
             <div className="Modal-header">
               <h3 className="App-titleControl App-titleControl--text">{this.title()}</h3>
             </div>
 
-            {alert ? <div className="Modal-alert">{this.alert}</div> : ''}
+            {this.alertAttrs ? <div className="Modal-alert">{Alert.component(this.alertAttrs)}</div> : ''}
 
             {this.content()}
           </form>
@@ -50,23 +67,13 @@ export default class Modal extends Component {
     );
   }
 
-  /**
-   * Determine whether or not the modal should be dismissible via an 'x' button.
-   *
-   * @return {Boolean}
-   */
-  isDismissible() {
-    return true;
-  }
-
   /**
    * Get the class name to apply to the modal.
    *
    * @return {String}
    * @abstract
    */
-  className() {
-  }
+  className() {}
 
   /**
    * Get the title of the modal dialog.
@@ -74,8 +81,7 @@ export default class Modal extends Component {
    * @return {String}
    * @abstract
    */
-  title() {
-  }
+  title() {}
 
   /**
    * Get the content of the modal.
@@ -83,16 +89,14 @@ export default class Modal extends Component {
    * @return {VirtualElement}
    * @abstract
    */
-  content() {
-  }
+  content() {}
 
   /**
    * Handle the modal form's submit event.
    *
    * @param {Event} e
    */
-  onsubmit() {
-  }
+  onsubmit() {}
 
   /**
    * Focus on the first input when the modal is ready to be used.
@@ -101,14 +105,13 @@ export default class Modal extends Component {
     this.$('form').find('input, select, textarea').first().focus().select();
   }
 
-  onhide() {
-  }
+  onhide() {}
 
   /**
    * Hide the modal.
    */
   hide() {
-    app.modal.close();
+    this.props.onhide();
   }
 
   /**
@@ -126,7 +129,7 @@ export default class Modal extends Component {
    * @param {RequestError} error
    */
   onerror(error) {
-    this.alert = error.alert;
+    this.alertAttrs = error.alert;
 
     m.redraw();
 

js/src/common/components/ModalManager.js

@@ -1,5 +1,4 @@
 import Component from '../Component';
-import Modal from './Modal';
 
 /**
  * The `ModalManager` component manages a modal dialog. Only one modal dialog
@@ -8,14 +7,15 @@ import Modal from './Modal';
  */
 export default class ModalManager extends Component {
   init() {
-    this.showing = false;
-    this.component = null;
+    this.state = this.props.state;
   }
 
   view() {
+    const modal = this.state.modal;
+
     return (
       <div className="ModalManager modal fade">
-        {this.component && this.component.render()}
+        {modal ? modal.componentClass.component({ ...modal.attrs, onshow: this.animateShow.bind(this), onhide: this.animateHide.bind(this) }) : ''}
       </div>
     );
   }
@@ -28,79 +28,25 @@ export default class ModalManager extends Component {
     // to be retained across route changes.
     context.retain = true;
 
+    // Ensure the modal state is notified about a closed modal, even when the
+    // DOM-based Bootstrap JavaScript code triggered the closing of the modal,
+    // e.g. via ESC key or a click on the modal backdrop.
+    this.$().on('hidden.bs.modal', this.state.close.bind(this.state));
+  }
+
+  animateShow(readyCallback) {
+    const dismissible = !!this.state.modal.componentClass.isDismissible;
+
     this.$()
-      .on('hidden.bs.modal', this.clear.bind(this))
-      .on('shown.bs.modal', this.onready.bind(this));
+      .one('shown.bs.modal', readyCallback)
+      .modal({
+        backdrop: dismissible || 'static',
+        keyboard: dismissible,
+      })
+      .modal('show');
   }
 
-  /**
-   * Show a modal dialog.
-   *
-   * @param {Modal} component
-   * @public
-   */
-  show(component) {
-    if (!(component instanceof Modal)) {
-      throw new Error('The ModalManager component can only show Modal components');
-    }
-
-    clearTimeout(this.hideTimeout);
-
-    this.showing = true;
-    this.component = component;
-
-    if (app.current) app.current.retain = true;
-
-    m.redraw(true);
-
-    this.$().modal({backdrop: this.component.isDismissible() ? true : 'static'}).modal('show');
-    this.onready();
-  }
-
-  /**
-   * Close the modal dialog.
-   *
-   * @public
-   */
-  close() {
-    if (!this.showing) return;
-
-    // Don't hide the modal immediately, because if the consumer happens to call
-    // the `show` method straight after to show another modal dialog, it will
-    // cause Bootstrap's modal JS to misbehave. Instead we will wait for a tiny
-    // bit to give the `show` method the opportunity to prevent this from going
-    // ahead.
-    this.hideTimeout = setTimeout(() => {
-      this.$().modal('hide');
-      this.showing = false;
-    });
-  }
-
-  /**
-   * Clear content from the modal area.
-   *
-   * @protected
-   */
-  clear() {
-    if (this.component) {
-      this.component.onhide();
-    }
-
-    this.component = null;
-
-    app.current.retain = false;
-
-    m.lazyRedraw();
-  }
-
-  /**
-   * When the modal dialog is ready to be used, tell it!
-   *
-   * @protected
-   */
-  onready() {
-    if (this.component && this.component.onready) {
-      this.component.onready(this.$());
-    }
+  animateHide() {
+    this.$().modal('hide');
   }
 }

js/src/common/components/Navigation.js

@@ -19,15 +19,15 @@ import LinkButton from './LinkButton';
  */
 export default class Navigation extends Component {
   view() {
-    const {history, pane} = app;
+    const { history, pane } = app;
 
     return (
-      <div className={'Navigation ButtonGroup ' + (this.props.className || '')}
+      <div
+        className={'Navigation ButtonGroup ' + (this.props.className || '')}
         onmouseenter={pane && pane.show.bind(pane)}
-        onmouseleave={pane && pane.onmouseleave.bind(pane)}>
-        {history.canGoBack()
-          ? [this.getBackButton(), this.getPaneButton()]
-          : this.getDrawerButton()}
+        onmouseleave={pane && pane.onmouseleave.bind(pane)}
+      >
+        {history.canGoBack() ? [this.getBackButton(), this.getPaneButton()] : this.getDrawerButton()}
       </div>
     );
   }
@@ -46,7 +46,7 @@ export default class Navigation extends Component {
    * @protected
    */
   getBackButton() {
-    const {history} = app;
+    const { history } = app;
     const previous = history.getPrevious() || {};
 
     return LinkButton.component({
@@ -55,11 +55,11 @@ export default class Navigation extends Component {
       icon: 'fas fa-chevron-left',
       title: previous.title,
       config: () => {},
-      onclick: e => {
+      onclick: (e) => {
         if (e.shiftKey || e.ctrlKey || e.metaKey || e.which === 2) return;
         e.preventDefault();
         history.back();
-      }
+      },
     });
   }
 
@@ -70,14 +70,14 @@ export default class Navigation extends Component {
    * @protected
    */
   getPaneButton() {
-    const {pane} = app;
+    const { pane } = app;
 
     if (!pane || !pane.active) return '';
 
     return Button.component({
       className: 'Button Button--icon Navigation-pin' + (pane.pinned ? ' active' : ''),
       onclick: pane.togglePinned.bind(pane),
-      icon: 'fas fa-thumbtack'
+      icon: 'fas fa-thumbtack',
     });
   }
 
@@ -90,17 +90,16 @@ export default class Navigation extends Component {
   getDrawerButton() {
     if (!this.props.drawer) return '';
 
-    const {drawer} = app;
+    const { drawer } = app;
     const user = app.session.user;
 
     return Button.component({
-      className: 'Button Button--icon Navigation-drawer' +
-        (user && user.newNotificationCount() ? ' new' : ''),
-      onclick: e => {
+      className: 'Button Button--icon Navigation-drawer' + (user && user.newNotificationCount() ? ' new' : ''),
+      onclick: (e) => {
         e.stopPropagation();
         drawer.show();
       },
-      icon: 'fas fa-bars'
+      icon: 'fas fa-bars',
     });
   }
 }

js/src/common/components/Page.js

@@ -1,4 +1,5 @@
-import Component from '../../common/Component';
+import Component from '../Component';
+import PageState from '../states/PageState';
 
 /**
  * The `Page` component
@@ -8,7 +9,7 @@ import Component from '../../common/Component';
 export default class Page extends Component {
   init() {
     app.previous = app.current;
-    app.current = this;
+    app.current = new PageState(this.constructor);
 
     app.drawer.hide();
     app.modal.close();

js/src/common/components/RequestErrorModal.js

@@ -0,0 +1,42 @@
+import Modal from './Modal';
+
+export default class RequestErrorModal extends Modal {
+  className() {
+    return 'RequestErrorModal Modal--large';
+  }
+
+  title() {
+    return this.props.error.xhr ? `${this.props.error.xhr.status} ${this.props.error.xhr.statusText}` : '';
+  }
+
+  content() {
+    const { error, formattedError } = this.props;
+
+    let responseText;
+
+    // If the error is already formatted, just add line endings;
+    // else try to parse it as JSON and stringify it with indentation
+    if (formattedError) {
+      responseText = formattedError.join('\n\n');
+    } else {
+      try {
+        const json = error.response || JSON.parse(error.responseText);
+
+        responseText = JSON.stringify(json, null, 2);
+      } catch (e) {
+        responseText = error.responseText;
+      }
+    }
+
+    return (
+      <div className="Modal-body">
+        <pre>
+          {this.props.error.options.method} {this.props.error.options.url}
+          <br />
+          <br />
+          {responseText}
+        </pre>
+      </div>
+    );
+  }
+}

js/src/common/components/Select.js

@@ -8,17 +8,25 @@ import icon from '../helpers/icon';
  * - `options` A map of option values to labels.
  * - `onchange` A callback to run when the selected value is changed.
  * - `value` The value of the selected option.
+ * - `disabled` Disabled state for the input.
  */
 export default class Select extends Component {
   view() {
-    const {options, onchange, value} = this.props;
+    const { options, onchange, value, disabled } = this.props;
 
     return (
       <span className="Select">
-        <select className="Select-input FormControl" onchange={onchange ? m.withAttr('value', onchange.bind(this)) : undefined} value={value}>
-          {Object.keys(options).map(key => <option value={key}>{options[key]}</option>)}
+        <select
+          className="Select-input FormControl"
+          onchange={onchange ? m.withAttr('value', onchange.bind(this)) : undefined}
+          value={value}
+          disabled={disabled}
+        >
+          {Object.keys(options).map((key) => (
+            <option value={key}>{options[key]}</option>
+          ))}
         </select>
-        {icon('fas fa-sort', {className: 'Select-caret'})}
+        {icon('fas fa-sort', { className: 'Select-caret' })}
       </span>
     );
   }

js/src/common/components/SelectDropdown.js

@@ -21,14 +21,11 @@ export default class SelectDropdown extends Dropdown {
   }
 
   getButtonContent() {
-    const activeChild = this.props.children.filter(child => child.props.active)[0];
-    let label = activeChild && activeChild.props.children || this.props.defaultLabel;
+    const activeChild = this.props.children.filter((child) => child.props.active)[0];
+    let label = (activeChild && activeChild.props.children) || this.props.defaultLabel;
 
     if (label instanceof Array) label = label[0];
 
-    return [
-      <span className="Button-label">{label}</span>,
-      icon(this.props.caretIcon, {className: 'Button-caret'})
-    ];
+    return [<span className="Button-label">{label}</span>, icon(this.props.caretIcon, { className: 'Button-caret' })];
   }
 }

js/src/common/components/Separator.js

@@ -5,7 +5,7 @@ import Component from '../Component';
  */
 class Separator extends Component {
   view() {
-    return <li className="Dropdown-separator"/>;
+    return <li className="Dropdown-separator" />;
   }
 }
 

js/src/common/components/SplitDropdown.js

@@ -24,12 +24,10 @@ export default class SplitDropdown extends Dropdown {
 
     return [
       Button.component(buttonProps),
-      <button
-        className={'Dropdown-toggle Button Button--icon ' + this.props.buttonClassName}
-        data-toggle="dropdown">
-        {icon(this.props.icon, {className: 'Button-icon'})}
-        {icon('fas fa-caret-down', {className: 'Button-caret'})}
-      </button>
+      <button className={'Dropdown-toggle Button Button--icon ' + this.props.buttonClassName} data-toggle="dropdown">
+        {icon(this.props.icon, { className: 'Button-icon' })}
+        {icon('fas fa-caret-down', { className: 'Button-caret' })}
+      </button>,
     ];
   }
 

js/src/common/components/Switch.js

@@ -12,6 +12,6 @@ export default class Switch extends Checkbox {
   }
 
   getDisplay() {
-    return this.loading ? super.getDisplay() : '';
+    return this.props.loading ? super.getDisplay() : '';
   }
 }

js/src/common/extend.js

@@ -21,7 +21,7 @@
 export function extend(object, method, callback) {
   const original = object[method];
 
-  object[method] = function(...args) {
+  object[method] = function (...args) {
     const value = original ? original.apply(this, args) : undefined;
 
     callback.apply(this, [value].concat(args));
@@ -57,7 +57,7 @@ export function extend(object, method, callback) {
 export function override(object, method, newMethod) {
   const original = object[method];
 
-  object[method] = function(...args) {
+  object[method] = function (...args) {
     return newMethod.apply(this, [original.bind(this)].concat(args));
   };
 

js/src/common/extend/Model.js

@@ -1,4 +1,4 @@
-export default class Routes {
+export default class Model {
   type;
   attributes = [];
   hasOnes = [];
@@ -31,11 +31,11 @@ export default class Routes {
     if (this.model) {
       app.store.models[this.type] = this.model;
     }
-    
+
     const model = app.store.models[this.type];
 
-    this.attributes.forEach(name => model.prototype[name] = model.attribute(name));
-    this.hasOnes.forEach(name => model.prototype[name] = model.hasOne(name));
-    this.hasManys.forEach(name => model.prototype[name] = model.hasMany(name));
+    this.attributes.forEach((name) => (model.prototype[name] = model.attribute(name)));
+    this.hasOnes.forEach((name) => (model.prototype[name] = model.hasOne(name)));
+    this.hasManys.forEach((name) => (model.prototype[name] = model.hasMany(name)));
   }
-}
+}

js/src/common/extend/PostTypes.js

@@ -10,4 +10,4 @@ export default class PostTypes {
   extend(app, extension) {
     Object.assign(app.postComponents, this.postComponents);
   }
-}
+}

js/src/common/extend/Routes.js

@@ -10,4 +10,4 @@ export default class Routes {
   extend(app, extension) {
     Object.assign(app.routes, this.routes);
   }
-}
+}

js/src/common/helpers/avatar.js

@@ -25,11 +25,11 @@ export default function avatar(user, attrs = {}) {
     if (hasTitle) attrs.title = attrs.title || username;
 
     if (avatarUrl) {
-      return <img {...attrs} src={avatarUrl}/>;
+      return <img {...attrs} src={avatarUrl} />;
     }
 
     content = username.charAt(0).toUpperCase();
-    attrs.style = {background: user.color()};
+    attrs.style = { background: user.color() };
   }
 
   return <span {...attrs}>{content}</span>;

js/src/common/helpers/fullTime.js

@@ -6,10 +6,14 @@
  * @return {Object}
  */
 export default function fullTime(time) {
-  const mo = moment(time);
+  const d = dayjs(time);
 
-  const datetime = mo.format();
-  const full = mo.format('LLLL');
+  const datetime = d.format();
+  const full = d.format('LLLL');
 
-  return <time pubdate datetime={datetime}>{full}</time>;
+  return (
+    <time pubdate datetime={datetime}>
+      {full}
+    </time>
+  );
 }

js/src/common/helpers/humanTime.js

@@ -9,11 +9,15 @@ import humanTimeUtil from '../utils/humanTime';
  * @return {Object}
  */
 export default function humanTime(time) {
-  const mo = moment(time);
+  const d = dayjs(time);
 
-  const datetime = mo.format();
-  const full = mo.format('LLLL');
+  const datetime = d.format();
+  const full = d.format('LLLL');
   const ago = humanTimeUtil(time);
 
-  return <time pubdate datetime={datetime} title={full} data-humantime>{ago}</time>;
+  return (
+    <time pubdate datetime={datetime} title={full} data-humantime>
+      {ago}
+    </time>
+  );
 }

js/src/common/helpers/icon.js

@@ -8,5 +8,5 @@
 export default function icon(fontClass, attrs = {}) {
   attrs.className = 'icon ' + fontClass + ' ' + (attrs.className || '');
 
-  return <i {...attrs}/>;
+  return <i {...attrs} />;
 }

js/src/common/helpers/listItems.js

@@ -29,7 +29,7 @@ function withoutUnnecessarySeparators(items) {
 export default function listItems(items) {
   if (!(items instanceof Array)) items = [items];
 
-  return withoutUnnecessarySeparators(items).map(item => {
+  return withoutUnnecessarySeparators(items).map((item) => {
     const isListItem = item.component && item.component.isListItem;
     const active = item.component && item.component.isActive && item.component.isActive(item.props);
     const className = item.props ? item.props.itemClassName : item.itemClassName;
@@ -39,15 +39,12 @@ export default function listItems(items) {
       item.attrs.key = item.attrs.key || item.itemName;
     }
 
-    return isListItem
-      ? item
-      : <li className={classList([
-          (item.itemName ? 'item-' + item.itemName : ''),
-          className,
-          (active ? 'active' : '')
-        ])}
-          key={item.itemName}>
-          {item}
-        </li>;
+    return isListItem ? (
+      item
+    ) : (
+      <li className={classList([item.itemName ? 'item-' + item.itemName : '', className, active ? 'active' : ''])} key={item.itemName}>
+        {item}
+      </li>
+    );
   });
 }

js/src/common/helpers/punctuateSeries.js

@@ -13,7 +13,7 @@ export default function punctuateSeries(items) {
   if (items.length === 2) {
     return app.translator.trans('core.lib.series.two_text', {
       first: items[0],
-      second: items[1]
+      second: items[1],
     });
   } else if (items.length >= 3) {
     // If there are three or more items, we will join all but the first and
@@ -27,7 +27,7 @@ export default function punctuateSeries(items) {
     return app.translator.trans('core.lib.series.three_text', {
       first: items[0],
       second,
-      third: items[items.length - 1]
+      third: items[items.length - 1],
     });
   }
 

js/src/common/helpers/userOnline.js

@@ -7,7 +7,7 @@ import icon from './icon';
  * @return {Object}
  */
 export default function userOnline(user) {
-    if (user.lastSeenAt() && user.isOnline()) {
-        return <span className="UserOnline">{icon('fas fa-circle')}</span>;
-    }
+  if (user.lastSeenAt() && user.isOnline()) {
+    return <span className="UserOnline">{icon('fas fa-circle')}</span>;
+  }
 }

js/src/common/index.js

@@ -1,6 +1,6 @@
 import 'expose-loader?$!expose-loader?jQuery!jquery';
 import 'expose-loader?m!mithril';
-import 'expose-loader?moment!moment';
+import 'expose-loader?moment!expose-loader?dayjs!dayjs';
 import 'expose-loader?m.bidi!m.attrs.bidi';
 import 'bootstrap/js/affix';
 import 'bootstrap/js/dropdown';
@@ -9,6 +9,12 @@ import 'bootstrap/js/tooltip';
 import 'bootstrap/js/transition';
 import 'jquery.hotkeys/jquery.hotkeys';
 
+import relativeTime from 'dayjs/plugin/relativeTime';
+import localizedFormat from 'dayjs/plugin/localizedFormat';
+
+dayjs.extend(relativeTime);
+dayjs.extend(localizedFormat);
+
 import patchMithril from './utils/patchMithril';
 
 patchMithril(window);

js/src/common/models/Discussion.js

@@ -19,18 +19,18 @@ Object.assign(Discussion.prototype, {
   lastPostNumber: Model.attribute('lastPostNumber'),
 
   commentCount: Model.attribute('commentCount'),
-  replyCount: computed('commentCount', commentCount => Math.max(0, commentCount - 1)),
+  replyCount: computed('commentCount', (commentCount) => Math.max(0, commentCount - 1)),
   posts: Model.hasMany('posts'),
   mostRelevantPost: Model.hasOne('mostRelevantPost'),
 
   lastReadAt: Model.attribute('lastReadAt', Model.transformDate),
   lastReadPostNumber: Model.attribute('lastReadPostNumber'),
-  isUnread: computed('unreadCount', unreadCount => !!unreadCount),
-  isRead: computed('unreadCount', unreadCount => app.session.user && !unreadCount),
+  isUnread: computed('unreadCount', (unreadCount) => !!unreadCount),
+  isRead: computed('unreadCount', (unreadCount) => app.session.user && !unreadCount),
 
   hiddenAt: Model.attribute('hiddenAt', Model.transformDate),
   hiddenUser: Model.hasOne('hiddenUser'),
-  isHidden: computed('hiddenAt', hiddenAt => !!hiddenAt),
+  isHidden: computed('hiddenAt', (hiddenAt) => !!hiddenAt),
 
   canReply: Model.attribute('canReply'),
   canRename: Model.attribute('canRename'),
@@ -68,7 +68,10 @@ Object.assign(Discussion.prototype, {
     const user = app.session.user;
 
     if (user && user.markedAllAsReadAt() < this.lastPostedAt()) {
-      return Math.max(0, this.lastPostNumber() - (this.lastReadPostNumber() || 0));
+      const unreadCount = Math.max(0, this.lastPostNumber() - (this.lastReadPostNumber() || 0));
+      // If posts have been deleted, it's possible that the unread count could exceed the
+      // actual post count. As such, we take the min of the two to ensure this isn't an issue.
+      return Math.min(unreadCount, this.commentCount());
     }
 
     return 0;
@@ -84,7 +87,7 @@ Object.assign(Discussion.prototype, {
     const items = new ItemList();
 
     if (this.isHidden()) {
-      items.add('hidden', <Badge type="hidden" icon="fas fa-trash" label={app.translator.trans('core.lib.badge.hidden_tooltip')}/>);
+      items.add('hidden', <Badge type="hidden" icon="fas fa-trash" label={app.translator.trans('core.lib.badge.hidden_tooltip')} />);
     }
 
     return items;
@@ -99,6 +102,6 @@ Object.assign(Discussion.prototype, {
   postIds() {
     const posts = this.data.relationships.posts;
 
-    return posts ? posts.data.map(link => link.id) : [];
-  }
+    return posts ? posts.data.map((link) => link.id) : [];
+  },
 });

js/src/common/models/Group.js

@@ -6,7 +6,8 @@ Object.assign(Group.prototype, {
   nameSingular: Model.attribute('nameSingular'),
   namePlural: Model.attribute('namePlural'),
   color: Model.attribute('color'),
-  icon: Model.attribute('icon')
+  icon: Model.attribute('icon'),
+  isHidden: Model.attribute('isHidden'),
 });
 
 Group.ADMINISTRATOR_ID = '1';

js/src/common/models/Notification.js

@@ -11,5 +11,5 @@ Object.assign(Notification.prototype, {
 
   user: Model.hasOne('user'),
   fromUser: Model.hasOne('fromUser'),
-  subject: Model.hasOne('subject')
+  subject: Model.hasOne('subject'),
 });

js/src/common/models/Post.js

@@ -17,13 +17,13 @@ Object.assign(Post.prototype, {
 
   editedAt: Model.attribute('editedAt', Model.transformDate),
   editedUser: Model.hasOne('editedUser'),
-  isEdited: computed('editedAt', editedAt => !!editedAt),
+  isEdited: computed('editedAt', (editedAt) => !!editedAt),
 
   hiddenAt: Model.attribute('hiddenAt', Model.transformDate),
   hiddenUser: Model.hasOne('hiddenUser'),
-  isHidden: computed('hiddenAt', hiddenAt => !!hiddenAt),
+  isHidden: computed('hiddenAt', (hiddenAt) => !!hiddenAt),
 
   canEdit: Model.attribute('canEdit'),
   canHide: Model.attribute('canHide'),
-  canDelete: Model.attribute('canDelete')
+  canDelete: Model.attribute('canDelete'),
 });

js/src/common/models/User.js

@@ -32,7 +32,7 @@ Object.assign(User.prototype, {
   canDelete: Model.attribute('canDelete'),
 
   avatarColor: null,
-  color: computed('username', 'avatarUrl', 'avatarColor', function(username, avatarUrl, avatarColor) {
+  color: computed('username', 'avatarUrl', 'avatarColor', function (username, avatarUrl, avatarColor) {
     // If we've already calculated and cached the dominant color of the user's
     // avatar, then we can return that in RGB format. If we haven't, we'll want
     // to calculate it. Unless the user doesn't have an avatar, in which case
@@ -54,7 +54,7 @@ Object.assign(User.prototype, {
    * @public
    */
   isOnline() {
-    return this.lastSeenAt() > moment().subtract(5, 'minutes').toDate();
+    return dayjs().subtract(5, 'minutes').isBefore(this.lastSeenAt());
   },
 
   /**
@@ -67,8 +67,8 @@ Object.assign(User.prototype, {
     const groups = this.groups();
 
     if (groups) {
-      groups.forEach(group => {
-        items.add('group' + group.id(), GroupBadge.component({group}));
+      groups.forEach((group) => {
+        items.add('group' + group.id(), GroupBadge.component({ group }));
       });
     }
 
@@ -85,7 +85,7 @@ Object.assign(User.prototype, {
     const image = new Image();
     const user = this;
 
-    image.onload = function() {
+    image.onload = function () {
       const colorThief = new ColorThief();
       user.avatarColor = colorThief.getColor(this);
       user.freshness = new Date();
@@ -106,6 +106,6 @@ Object.assign(User.prototype, {
 
     Object.assign(preferences, newPreferences);
 
-    return this.save({preferences});
-  }
+    return this.save({ preferences });
+  },
 });

js/src/common/states/AlertManagerState.js

@@ -0,0 +1,50 @@
+import Alert from '../components/Alert';
+
+export default class AlertManagerState {
+  constructor() {
+    this.activeAlerts = {};
+    this.alertId = 0;
+  }
+
+  getActiveAlerts() {
+    return this.activeAlerts;
+  }
+
+  /**
+   * Show an Alert in the alerts area.
+   */
+  show(attrs, componentClass = Alert) {
+    // Breaking Change Compliance Warning, Remove in Beta 15.
+    // This is applied to the first argument (attrs) because previously, the alert was passed as the first argument.
+    if (attrs === Alert || attrs instanceof Alert) {
+      // This is duplicated so that if the error is caught, an error message still shows up in the debug console.
+      console.error('The AlertManager can only show Alerts. Whichever extension triggered this alert should be updated to comply with beta 14.');
+      throw new Error('The AlertManager can only show Alerts. Whichever extension triggered this alert should be updated to comply with beta 14.');
+    }
+    // End Change Compliance Warning, Remove in Beta 15
+    this.activeAlerts[++this.alertId] = { attrs, componentClass };
+    m.redraw();
+
+    return this.alertId;
+  }
+
+  /**
+   * Dismiss an alert.
+   */
+  dismiss(key) {
+    if (!key || !(key in this.activeAlerts)) return;
+
+    delete this.activeAlerts[key];
+    m.redraw();
+  }
+
+  /**
+   * Clear all alerts.
+   *
+   * @public
+   */
+  clear() {
+    this.activeAlerts = {};
+    m.redraw();
+  }
+}

js/src/common/states/ModalManagerState.js

@@ -0,0 +1,56 @@
+import Modal from '../components/Modal';
+
+export default class ModalManagerState {
+  constructor() {
+    this.modal = null;
+  }
+
+  /**
+   * Show a modal dialog.
+   *
+   * @public
+   */
+  show(componentClass, attrs) {
+    // Breaking Change Compliance Warning, Remove in Beta 15.
+    if (!(componentClass.prototype instanceof Modal)) {
+      // This is duplicated so that if the error is caught, an error message still shows up in the debug console.
+      console.error('The ModalManager can only show Modals');
+      throw new Error('The ModalManager can only show Modals');
+    }
+    if (componentClass.init) {
+      // This is duplicated so that if the error is caught, an error message still shows up in the debug console.
+      console.error(
+        'The componentClass parameter must be a modal class, not a modal instance. Whichever extension triggered this modal should be updated to comply with beta 14.'
+      );
+      throw new Error(
+        'The componentClass parameter must be a modal class, not a modal instance. Whichever extension triggered this modal should be updated to comply with beta 14.'
+      );
+    }
+    // End Change Compliance Warning, Remove in Beta 15
+
+    clearTimeout(this.closeTimeout);
+
+    this.modal = { componentClass, attrs };
+
+    m.redraw(true);
+  }
+
+  /**
+   * Close the modal dialog.
+   *
+   * @public
+   */
+  close() {
+    if (!this.modal) return;
+
+    // Don't hide the modal immediately, because if the consumer happens to call
+    // the `show` method straight after to show another modal dialog, it will
+    // cause Bootstrap's modal JS to misbehave. Instead we will wait for a tiny
+    // bit to give the `show` method the opportunity to prevent this from going
+    // ahead.
+    this.closeTimeout = setTimeout(() => {
+      this.modal = null;
+      m.lazyRedraw();
+    });
+  }
+}

js/src/common/states/PageState.js

@@ -0,0 +1,33 @@
+import subclassOf from '../../common/utils/subclassOf';
+
+export default class PageState {
+  constructor(type, data = {}) {
+    this.type = type;
+    this.data = data;
+  }
+
+  /**
+   * Determine whether the page matches the given class and data.
+   *
+   * @param {object} type The page class to check against. Subclasses are
+   *                      accepted as well.
+   * @param {object} data
+   * @return {boolean}
+   */
+  matches(type, data = {}) {
+    // Fail early when the page is of a different type
+    if (!subclassOf(this.type, type)) return false;
+
+    // Now that the type is known to be correct, we loop through the provided
+    // data to see whether it matches the data in our state.
+    return Object.keys(data).every((key) => this.data[key] === data[key]);
+  }
+
+  get(key) {
+    return this.data[key];
+  }
+
+  set(key, value) {
+    this.data[key] = value;
+  }
+}

js/src/common/utils/Drawer.js

@@ -7,7 +7,7 @@ export default class Drawer {
   constructor() {
     // Set up an event handler so that whenever the content area is tapped,
     // the drawer will close.
-    $('#content').click(e => {
+    $('#content').click((e) => {
       if (this.isOpen()) {
         e.preventDefault();
         this.hide();

js/src/common/utils/ItemList.ts

@@ -1,5 +1,9 @@
 class Item {
-  constructor(content, priority) {
+  content: any;
+  priority: number;
+  key?: number;
+
+  constructor(content: any, priority?: number) {
     this.content = content;
     this.priority = priority;
   }
@@ -10,25 +14,17 @@ class Item {
  * by priority.
  */
 export default class ItemList {
-  constructor() {
-    /**
-     * The items in the list.
-     *
-     * @type {Object}
-     * @public
-     */
-    this.items = {};
-  }
+  /**
+   * The items in the list
+   */
+  items: { [key: string]: Item } = {};
 
   /**
    * Check whether the list is empty.
-   *
-   * @returns {boolean}
-   * @public
    */
-  isEmpty() {
+  isEmpty(): boolean {
     for (const i in this.items) {
-      if(this.items.hasOwnProperty(i)) {
+      if (this.items.hasOwnProperty(i)) {
         return false;
       }
     }
@@ -38,36 +34,27 @@ export default class ItemList {
 
   /**
    * Check whether an item is present in the list.
-   *
-   * @param key
-   * @returns {boolean}
    */
-  has(key) {
+  has(key: string): boolean {
     return !!this.items[key];
   }
 
   /**
    * Get the content of an item.
-   *
-   * @param {String} key
-   * @return {*}
-   * @public
    */
-  get(key) {
+  get(key: string): any {
     return this.items[key].content;
   }
 
   /**
    * Add an item to the list.
    *
-   * @param {String} key A unique key for the item.
-   * @param {*} content The item's content.
-   * @param {Integer} [priority] The priority of the item. Items with a higher
+   * @param key A unique key for the item.
+   * @param content The item's content.
+   * @param [priority] The priority of the item. Items with a higher
    *     priority will be positioned before items with a lower priority.
-   * @return {ItemList}
-   * @public
    */
-  add(key, content, priority = 0) {
+  add(key: string, content: any, priority: number = 0): this {
     this.items[key] = new Item(content, priority);
 
     return this;
@@ -75,14 +62,8 @@ export default class ItemList {
 
   /**
    * Replace an item in the list, only if it is already present.
-   *
-   * @param {String} key
-   * @param {*} [content]
-   * @param {Integer} [priority]
-   * @return {ItemList}
-   * @public
    */
-  replace(key, content = null, priority = null) {
+  replace(key: string, content: any = null, priority: number = null): this {
     if (this.items[key]) {
       if (content !== null) {
         this.items[key].content = content;
@@ -98,12 +79,8 @@ export default class ItemList {
 
   /**
    * Remove an item from the list.
-   *
-   * @param {String} key
-   * @return {ItemList}
-   * @public
    */
-  remove(key) {
+  remove(key: string): this {
     delete this.items[key];
 
     return this;
@@ -111,12 +88,8 @@ export default class ItemList {
 
   /**
    * Merge another list's items into this one.
-   *
-   * @param {ItemList} items
-   * @return {ItemList}
-   * @public
    */
-  merge(items) {
+  merge(items: this): this {
     for (const i in items.items) {
       if (items.items.hasOwnProperty(i) && items.items[i] instanceof Item) {
         this.items[i] = items.items[i];
@@ -130,12 +103,9 @@ export default class ItemList {
    * Convert the list into an array of item content arranged by priority. Each
    * item's content will be assigned an `itemName` property equal to the item's
    * unique key.
-   *
-   * @return {Array}
-   * @public
    */
-  toArray() {
-    const items = [];
+  toArray(): any[] {
+    const items: Item[] = [];
 
     for (const i in this.items) {
       if (this.items.hasOwnProperty(i) && this.items[i] instanceof Item) {
@@ -147,14 +117,15 @@ export default class ItemList {
       }
     }
 
-    return items.sort((a, b) => {
-      if (a.priority === b.priority) {
-        return a.key - b.key;
-      } else if (a.priority > b.priority) {
-        return -1;
-      }
-      return 1;
-    }).map(item => item.content);
+    return items
+      .sort((a, b) => {
+        if (a.priority === b.priority) {
+          return a.key - b.key;
+        } else if (a.priority > b.priority) {
+          return -1;
+        }
+        return 1;
+      })
+      .map((item) => item.content);
   }
 }
-

js/src/common/utils/RequestError.ts

@@ -1,5 +1,14 @@
 export default class RequestError {
-  constructor(status, responseText, options, xhr) {
+  status: string;
+  options: object;
+  xhr: XMLHttpRequest;
+
+  responseText: string | null;
+  response: object | null;
+
+  alert: any;
+
+  constructor(status: string, responseText: string | null, options: object, xhr: XMLHttpRequest) {
     this.status = status;
     this.responseText = responseText;
     this.options = options;

js/src/common/utils/ScrollListener.js

@@ -1,9 +1,10 @@
-const later = window.requestAnimationFrame ||
+const later =
+  window.requestAnimationFrame ||
   window.webkitRequestAnimationFrame ||
   window.mozRequestAnimationFrame ||
   window.msRequestAnimationFrame ||
   window.oRequestAnimationFrame ||
-  (callback => window.setTimeout(callback, 1000 / 60));
+  ((callback) => window.setTimeout(callback, 1000 / 60));
 
 /**
  * The `ScrollListener` class sets up a listener that handles window scroll
@@ -57,10 +58,7 @@ export default class ScrollListener {
    */
   start() {
     if (!this.active) {
-      window.addEventListener(
-        'scroll',
-        this.active = this.loop.bind(this)
-      );
+      window.addEventListener('scroll', (this.active = this.loop.bind(this)));
     }
   }
 

js/src/common/utils/SubtreeRetainer.js

@@ -44,7 +44,7 @@ export default class SubtreeRetainer {
       }
     });
 
-    return needsRebuild ? false : {subtree: 'retain'};
+    return needsRebuild ? false : { subtree: 'retain' };
   }
 
   /**

js/src/common/utils/SuperTextarea.js

@@ -0,0 +1,109 @@
+/**
+ * A textarea wrapper with powerful helpers for text manipulation.
+ *
+ * This wraps a <textarea> DOM element and allows directly manipulating its text
+ * contents and cursor positions.
+ *
+ * I apologize for the pretentious name. :)
+ */
+export default class SuperTextarea {
+  /**
+   * @param {HTMLTextAreaElement} textarea
+   */
+  constructor(textarea) {
+    this.el = textarea;
+    this.$ = $(textarea);
+  }
+
+  /**
+   * Set the value of the text editor.
+   *
+   * @param {String} value
+   */
+  setValue(value) {
+    this.$.val(value).trigger('input');
+  }
+
+  /**
+   * Focus the textarea and place the cursor at the given index.
+   *
+   * @param {number} position
+   */
+  moveCursorTo(position) {
+    this.setSelectionRange(position, position);
+  }
+
+  /**
+   * Get the selected range of the textarea.
+   *
+   * @return {Array}
+   */
+  getSelectionRange() {
+    return [this.el.selectionStart, this.el.selectionEnd];
+  }
+
+  /**
+   * Insert content into the textarea at the position of the cursor.
+   *
+   * @param {String} text
+   */
+  insertAtCursor(text) {
+    this.insertAt(this.el.selectionStart, text);
+
+    this.el.dispatchEvent(new CustomEvent('input', { bubbles: true, cancelable: true }));
+  }
+
+  /**
+   * Insert content into the textarea at the given position.
+   *
+   * @param {number} pos
+   * @param {String} text
+   */
+  insertAt(pos, text) {
+    this.insertBetween(pos, pos, text);
+  }
+
+  /**
+   * Insert content into the textarea between the given positions.
+   *
+   * If the start and end positions are different, any text between them will be
+   * overwritten.
+   *
+   * @param start
+   * @param end
+   * @param text
+   */
+  insertBetween(start, end, text) {
+    const value = this.el.value;
+
+    const before = value.slice(0, start);
+    const after = value.slice(end);
+
+    this.setValue(`${before}${text}${after}`);
+
+    // Move the textarea cursor to the end of the content we just inserted.
+    this.moveCursorTo(start + text.length);
+  }
+
+  /**
+   * Replace existing content from the start to the current cursor position.
+   *
+   * @param start
+   * @param text
+   */
+  replaceBeforeCursor(start, text) {
+    this.insertBetween(start, this.el.selectionStart, text);
+  }
+
+  /**
+   * Set the selected range of the textarea.
+   *
+   * @param {number} start
+   * @param {number} end
+   * @private
+   */
+  setSelectionRange(start, end) {
+    this.el.setSelectionRange(start, end);
+    this.$.focus();
+  }
+}

js/src/common/utils/abbreviateNumber.ts

@@ -4,11 +4,8 @@
  * @example
  * abbreviateNumber(1234);
  * // "1.2K"
- *
- * @param {Integer} number
- * @return {String}
  */
-export default function abbreviateNumber(number) {
+export default function abbreviateNumber(number: number): string {
   // TODO: translation
   if (number >= 1000000) {
     return Math.floor(number / 1000000) + app.translator.trans('core.lib.number_suffix.mega_text');

js/src/common/utils/classList.js

@@ -13,7 +13,7 @@ export default function classList(classes) {
   let classNames;
 
   if (classes instanceof Array) {
-    classNames = classes.filter(name => name);
+    classNames = classes.filter((name) => name);
   } else {
     classNames = [];