Webpack (#1367)

* Replace gulp with webpack and npm scripts for JS compilation
* Set up Travis CI to commit compiled JS
* Restructure `js` directory; only one instance of npm, forum/admin are "submodules"
* Refactor JS initializers into Application subclasses
* Maintain partial compatibility API (importing from absolute paths) for extensions
* Remove minification responsibility from PHP asset compiler
* Restructure `less` directory

js/src/forum/utils/alertEmailConfirmation.js

@@ -0,0 +1,55 @@
+import Alert from '../../common/components/Alert';
+import Button from '../../common/components/Button';
+import icon from '../../common/helpers/icon';
+
+/**
+ * Shows an alert if the user has not yet confirmed their email address.
+ *
+ * @param {ForumApp} app
+ */
+export default function alertEmailConfirmation(app) {
+  const user = app.session.user;
+
+  if (!user || user.isActivated()) return;
+
+  const resendButton = Button.component({
+    className: 'Button Button--link',
+    children: app.translator.trans('core.forum.user_email_confirmation.resend_button'),
+    onclick: function() {
+      resendButton.props.loading = true;
+      m.redraw();
+
+      app.request({
+        method: 'POST',
+        url: app.forum.attribute('apiUrl') + '/users/' + user.id() + '/send-confirmation',
+      }).then(() => {
+        resendButton.props.loading = false;
+        resendButton.props.children = [icon('fas fa-check'), ' ', app.translator.trans('core.forum.user_email_confirmation.sent_message')];
+        resendButton.props.disabled = true;
+        m.redraw();
+      }).catch(() => {
+        resendButton.props.loading = false;
+        m.redraw();
+      });
+    }
+  });
+
+  class ContainedAlert extends Alert {
+    view() {
+      const vdom = super.view();
+
+      vdom.children = [<div className="container">{vdom.children}</div>];
+
+      return vdom;
+    }
+  }
+
+  m.mount(
+    $('<div/>').insertBefore('#content')[0],
+    ContainedAlert.component({
+      dismissible: false,
+      children: app.translator.trans('core.forum.user_email_confirmation.alert_message', {email: <strong>{user.email()}</strong>}),
+      controls: [resendButton]
+    })
+  );
+}