FIX: Allow non-english usernames in autocomplete

Also add support for username formatters

app/assets/javascripts/discourse/components/user-selector.js.es6

@@ -2,6 +2,7 @@ import { observes } from "ember-addons/ember-computed-decorators";
 import TextField from "discourse/components/text-field";
 import userSearch from "discourse/lib/user-search";
 import { findRawTemplate } from "discourse/lib/raw-templates";
+import { formatUsername } from "discourse/lib/utilities";
 
 export default TextField.extend({
   autocorrect: false,
@@ -46,11 +47,6 @@ export default TextField.extend({
       return usernames;
     }
 
-    const termRegexp =
-      currentUser && currentUser.can_send_private_email_messages
-        ? /[^\w.-@]/g
-        : /[^\w.-]/g;
-
     this.$()
       .val(this.get("usernames"))
       .autocomplete({
@@ -62,7 +58,7 @@ export default TextField.extend({
 
         dataSource(term) {
           var results = userSearch({
-            term: term.replace(termRegexp, ""),
+            term,
             topicId: self.get("topicId"),
             exclude: excludedUsernames(),
             includeGroups,
@@ -72,7 +68,6 @@ export default TextField.extend({
             group: self.get("group"),
             disallowEmails
           });
-
           return results;
         },
 

app/assets/javascripts/discourse/lib/user-search.js.es6

@@ -122,8 +122,7 @@ export default function userSearch(options) {
   currentTerm = term;
 
   return new Ember.RSVP.Promise(function(resolve) {
-    // TODO site setting for allowed regex in username
-    if (term.match(/[^\w_\-\.@\+]/)) {
+    if (term.length === 0) {
       resolve([]);
       return;
     }

app/assets/javascripts/discourse/templates/user-selector-autocomplete.raw.hbs

@@ -4,7 +4,7 @@
       <li>
         <a href title="{{user.name}}">
           {{avatar user imageSize="tiny"}}
-          <span class='username'>{{user.username}}</span>
+          <span class='username'>{{format-username user.username}}</span>
           <span class='name'>{{user.name}}</span>
         </a>
       </li>
@@ -15,7 +15,7 @@
         <li>
           <a href title="{{email.username}}">
             <i class='fa fa-envelope'></i>
-            <span class='username'>{{email.username}}</span>
+            <span class='username'>{{format-username email.username}}</span>
           </a>
         </li>
       {{/each}}