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/components/UsersSearchSource.js

@@ -0,0 +1,53 @@
+import highlight from '../../common/helpers/highlight';
+import avatar from '../../common/helpers/avatar';
+import username from '../../common/helpers/username';
+
+/**
+ * The `UsersSearchSource` finds and displays user search results in the search
+ * dropdown.
+ *
+ * @implements SearchSource
+ */
+export default class UsersSearchResults {
+  constructor() {
+    this.results = {};
+  }
+
+  search(query) {
+    return app.store.find('users', {
+      filter: {q: query},
+      page: {limit: 5}
+    }).then(results => {
+      this.results[query] = results;
+      m.redraw();
+    });
+  }
+
+  view(query) {
+    query = query.toLowerCase();
+
+    const results = (this.results[query] || [])
+      .concat(app.store.all('users').filter(user => [user.username(), user.displayName()].some(value => value.toLowerCase().substr(0, query.length) === query)))
+      .filter((e, i, arr) => arr.lastIndexOf(e) === i)
+      .sort((a, b) => a.displayName().localeCompare(b.displayName()));
+
+    if (!results.length) return '';
+
+    return [
+      <li className="Dropdown-header">{app.translator.trans('core.forum.search.users_heading')}</li>,
+      results.map(user => {
+        const name = username(user);
+        name.children[0] = highlight(name.children[0], query);
+
+        return (
+          <li className="UserSearchResult" data-index={'users' + user.id()}>
+            <a href={app.route.user(user)} config={m.route}>
+              {avatar(user)}
+              {name}
+            </a>
+          </li>
+        );
+      })
+    ];
+  }
+}