some refactoring (cc @techAPJ)

app/assets/javascripts/discourse/controllers/invite.js.es6

@@ -12,77 +12,41 @@ export default ObjectController.extend(ModalFunctionality, {
     return Discourse.User.currentProp("admin");
   }.property(),
 
-  /**
-    Can we submit the form?
-
-    @property disabled
-  **/
   disabled: function() {
     if (this.get('saving')) return true;
     if (this.blank('emailOrUsername')) return true;
-    if ( !this.get('invitingToTopic') && !Discourse.Utilities.emailValid(this.get('emailOrUsername')) ) return true;
+    if (!this.get('invitingToTopic') && !Discourse.Utilities.emailValid(this.get('emailOrUsername'))) return true;
     if (this.get('model.details.can_invite_to')) return false;
     if (this.get('isPrivateTopic') && this.blank('groupNames')) return true;
     return false;
   }.property('emailOrUsername', 'invitingToTopic', 'isPrivateTopic', 'groupNames', 'saving'),
 
-  /**
-    The current text for the invite button
-
-    @property buttonTitle
-  **/
   buttonTitle: function() {
-    if (this.get('saving')) return I18n.t('topic.inviting');
-    return I18n.t('topic.invite_reply.action');
+    return this.get('saving') ? I18n.t('topic.inviting') : I18n.t('topic.invite_reply.action');
   }.property('saving'),
 
-  /**
-    We are inviting to a topic if the model isn't the current user. The current user would
-    mean we are inviting to the forum in general.
-
-    @property invitingToTopic
-  **/
+  // We are inviting to a topic if the model isn't the current user.
+  // The current user would mean we are inviting to the forum in general.
   invitingToTopic: function() {
     return this.get('model') !== Discourse.User.current();
   }.property('model'),
 
-  /**
-    Is Private Topic? (i.e. visible only to specific group members)
-
-    @property isPrivateTopic
-  **/
+  // Is Private Topic? (i.e. visible only to specific group members)
   isPrivateTopic: Em.computed.and('invitingToTopic', 'model.category.read_restricted'),
 
-  /**
-    Is Message?
-
-    @property isMessage
-  **/
   isMessage: Em.computed.equal('model.archetype', 'private_message'),
 
-  /**
-    Allow Existing Members? (username autocomplete)
-
-    @property allowExistingMembers
-  **/
+  // Allow Existing Members? (username autocomplete)
   allowExistingMembers: function() {
     return this.get('invitingToTopic') && !this.get('isPrivateTopic');
   }.property('invitingToTopic', 'isPrivateTopic'),
 
-  /**
-    Show Groups? (add invited user to private group)
-
-    @property showGroups
-  **/
+  // Show Groups? (add invited user to private group)
   showGroups: function() {
     return this.get('isAdmin') && (Discourse.Utilities.emailValid(this.get('emailOrUsername')) || this.get('isPrivateTopic') || !this.get('invitingToTopic'));
   }.property('isAdmin', 'emailOrUsername', 'isPrivateTopic', 'invitingToTopic'),
 
-  /**
-    Instructional text for the modal.
-
-    @property inviteInstructions
-  **/
+  // Instructional text for the modal.
   inviteInstructions: function() {
     if (this.get('isMessage')) {
       return I18n.t('topic.invite_private.email_or_username');
@@ -100,58 +64,29 @@ export default ObjectController.extend(ModalFunctionality, {
     }
   }.property('isMessage', 'invitingToTopic', 'emailOrUsername'),
 
-  /**
-    Instructional text for the group selection.
-
-    @property groupInstructions
-  **/
+  // Instructional text for the group selection.
   groupInstructions: function() {
-    if (this.get('isPrivateTopic')) {
-      return I18n.t('topic.automatically_add_to_groups_required');
-    } else {
-      return I18n.t('topic.automatically_add_to_groups_optional');
-    }
+    return this.get('isPrivateTopic') ?
+            I18n.t('topic.automatically_add_to_groups_required') :
+            I18n.t('topic.automatically_add_to_groups_optional');
   }.property('isPrivateTopic'),
 
-  /**
-    Function to find groups.
-  **/
-  groupFinder: function(term) {
+  groupFinder(term) {
     return Discourse.Group.findAll({search: term, ignore_automatic: true});
   },
 
-  /**
-    The "success" text for when the invite was created.
-
-    @property successMessage
-  **/
   successMessage: function() {
-    if (this.get('isMessage')) {
-      return I18n.t('topic.invite_private.success');
-    } else {
-      return I18n.t('topic.invite_reply.success', { emailOrUsername: this.get('emailOrUsername') });
-    }
+    return this.get('isMessage') ?
+            I18n.t('topic.invite_private.success') :
+            I18n.t('topic.invite_reply.success', { emailOrUsername: this.get('emailOrUsername') });
   }.property('isMessage', 'emailOrUsername'),
 
-  /**
-    The "error" text for when the invite fails.
-
-    @property errorMessage
-  **/
   errorMessage: function() {
-    if (this.get('isMessage')) {
-      return I18n.t('topic.invite_private.error');
-    } else {
-      return I18n.t('topic.invite_reply.error');
-    }
+    return this.get('isMessage') ? I18n.t('topic.invite_private.error') : I18n.t('topic.invite_reply.error');
   }.property('isMessage'),
 
-  /**
-    Reset the modal to allow a new user to be invited.
-
-    @method reset
-  **/
-  reset: function() {
+  // Reset the modal to allow a new user to be invited.
+  reset() {
     this.setProperties({
       emailOrUsername: null,
       groupNames: null,
@@ -163,36 +98,26 @@ export default ObjectController.extend(ModalFunctionality, {
 
   actions: {
 
-    /**
-      Create the invite and update the modal accordingly.
-
-      @method createInvite
-    **/
-    createInvite: function() {
-
+    createInvite() {
       if (this.get('disabled')) { return; }
 
-      var self = this;
-      var groupNames = this.get('groupNames');
-      var userInvitedController = this.get('controllers.user-invited');
+      const groupNames = this.get('groupNames'),
+            userInvitedController = this.get('controllers.user-invited');
 
       this.setProperties({ saving: true, error: false });
-      this.get('model').createInvite(this.get('emailOrUsername'), groupNames).then(function(result) {
-        self.setProperties({ saving: false, finished: true });
-        if (!self.get('invitingToTopic')) {
-          Discourse.Invite.findInvitedBy(Discourse.User.current()).then(function (invite_model) {
-            userInvitedController.set('model', invite_model);
-            userInvitedController.set('totalInvites', invite_model.invites.length);
-          });
-        } else if (self.get('isMessage') && result && result.user) {
-          self.get('model.details.allowed_users').pushObject(result.user);
-        }
-      }).catch(function() {
-        self.setProperties({ saving: false, error: true });
-      });
-      return false;
+
+      return this.get('model').createInvite(this.get('emailOrUsername'), groupNames).then(result => {
+              this.setProperties({ saving: false, finished: true });
+              if (!this.get('invitingToTopic')) {
+                Discourse.Invite.findInvitedBy(Discourse.User.current()).then(invite_model => {
+                  userInvitedController.set('model', invite_model);
+                  userInvitedController.set('totalInvites', invite_model.invites.length);
+                });
+              } else if (this.get('isMessage') && result && result.user) {
+                this.get('model.details.allowed_users').pushObject(result.user);
+              }
+            }).catch(() => this.setProperties({ saving: false, error: true }));
     }
   }
 
-
 });

app/assets/javascripts/discourse/templates/modal/invite.hbs

@@ -5,18 +5,15 @@
       {{errorMessage}}
     </div>
   {{/if}}
-
   {{#if finished}}
     {{{successMessage}}}
   {{else}}
-
     <label>{{inviteInstructions}}</label>
     {{#if allowExistingMembers}}
       {{user-selector single="true" allowAny=true usernames=emailOrUsername includeGroups="true" placeholderKey="topic.invite_private.email_or_username_placeholder"}}
     {{else}}
       {{text-field value=emailOrUsername placeholderKey="topic.invite_reply.email_placeholder"}}
     {{/if}}
-
     {{#if showGroups}}
       <label>{{{groupInstructions}}}</label>
       {{group-selector groupFinder=groupFinder groupNames=groupNames placeholderKey="topic.invite_private.group_name"}}
@@ -25,9 +22,8 @@
 </div>
 <div class="modal-footer">
   {{#if finished}}
-    <button class='btn btn-primary' {{action "closeModal"}}>{{i18n 'close'}}</button>
+    {{d-button class="btn-primary" action="closeModal" label="close"}}
   {{else}}
-    <button class='btn btn-primary' {{bind-attr disabled="disabled"}} {{action "createInvite"}}><i class="fa fa-user-plus"></i>{{buttonTitle}}</button>
+    <button class='btn btn-primary' {{bind-attr disabled="disabled"}} {{action "createInvite"}}>{{fa-icon "user-plus"}}{{buttonTitle}}</button>
   {{/if}}
-
 </div>

app/assets/javascripts/discourse/views/invite-reply-button.js.es6

@@ -6,11 +6,11 @@ export default ButtonView.extend({
   attributeBindings: ['disabled'],
   disabled: Em.computed.or('controller.archived', 'controller.closed', 'controller.deleted'),
 
-  renderIcon: function(buffer) {
+  renderIcon(buffer) {
     buffer.push("<i class='fa fa-users'></i>");
   },
 
-  click: function() {
-    return this.get('controller').send('showInvite');
+  click() {
+    this.get('controller').send('showInvite');
   }
 });

app/assets/javascripts/discourse/views/modal-body.js.es6

@@ -7,7 +7,7 @@ export default Discourse.View.extend({
 
     // Focus on first element
     if (!Discourse.Mobile.mobileView && this.get('focusInput')) {
-      Em.run.schedule('afterRender', () => this.$('input:first').focus() );
+      Em.run.schedule('afterRender', () => this.$('input:first').focus());
     }
 
     const title = this.get('title');

app/assets/javascripts/discourse/views/modal.js.es6

@@ -12,12 +12,5 @@ export default Ember.View.extend({
       // the backdrop and makes it unclickable.
       $('.modal-header a.close').click();
     }
-  },
-
-  keyDown(e) {
-    // Delegate click to modal close when pressing ESC
-    if (e.keyCode === 27) {
-      Em.run.next(() => $('.modal-header a.close').click());
-    }
   }
 });