FEATURE: when PMing a user from the topic page, insert a link to the current post

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

@@ -371,7 +371,6 @@ export default DiscourseController.extend({
         // If it's the same draft, just open it up again.
         if (composerModel.get('composeState') === Discourse.Composer.DRAFT &&
             composerModel.get('draftKey') === opts.draftKey) {
-
           composerModel.set('composeState', Discourse.Composer.OPEN);
           return resolve();
         }

app/assets/javascripts/discourse/controllers/user-card.js.es6

@@ -9,6 +9,7 @@ export default ObjectController.extend({
   avatar: null,
   userLoading: null,
   cardTarget: null,
+  post: null,
 
   postStream: Em.computed.alias('controllers.topic.postStream'),
   enoughPostsForFiltering: Em.computed.gte('participant.post_count', 2),
@@ -31,7 +32,7 @@ export default ObjectController.extend({
     return img && img.indexOf('fa-') !== 0;
   }.property('user.card_badge.image'),
 
-  show: function(username, target) {
+  show: function(username, postId, target) {
     // XSS protection (should be encapsulated)
     username = username.toString().replace(/[^A-Za-z0-9_]/g, "");
     var url = "/users/" + username;
@@ -43,14 +44,14 @@ export default ObjectController.extend({
     }
 
     var currentUsername = this.get('username'),
-        wasVisible = this.get('visible');
+        wasVisible = this.get('visible'),
+        post = this.get('viewingTopic') && postId ? this.get('controllers.topic.postStream').findLoadedPost(postId) : null;
 
-    this.set('avatar', null);
+    this.setProperties({ avatar: null, post: post, username: username });
-    this.set('username', username);
 
     // If we click the avatar again, close it (unless its diff element on the screen).
     if (target === this.get('cardTarget') && wasVisible) {
-      this.setProperties({ visible: false, username: null, avatar: null, cardTarget: null });
+      this.setProperties({ visible: false, username: null, cardTarget: null });
       return;
     }
 
@@ -67,11 +68,9 @@ export default ObjectController.extend({
       this.set('participant', participants.findBy('username', username));
     }
 
-    var self = this;
+    this.setProperties({ user: null, userLoading: username, cardTarget: target });
-    self.set('user', null);
-    self.set('userLoading', username);
-    self.set('cardTarget', target);
 
+    var self = this;
     Discourse.User.findByUsername(username).then(function (user) {
       user = Discourse.User.create(user);
       self.setProperties({ user: user, avatar: user, visible: true});
@@ -82,8 +81,7 @@ export default ObjectController.extend({
   },
 
   close: function() {
-    this.set('visible', false);
+    this.setProperties({ visible: false, cardTarget: null });
-    this.set('cardTarget', null);
   },
 
   actions: {

app/assets/javascripts/discourse/routes/application.js.es6

@@ -25,10 +25,10 @@ const ApplicationRoute = Discourse.Route.extend({
       this.controllerFor('topic-entrance').send('show', data);
     },
 
-    composePrivateMessage(user) {
+    composePrivateMessage(user, post) {
       const self = this;
       this.transitionTo('userActivity', user).then(function () {
-        self.controllerFor('user-activity').send('composePrivateMessage', user);
+        self.controllerFor('user-activity').send('composePrivateMessage', user, post);
       });
     },
 

app/assets/javascripts/discourse/routes/user.js.es6

@@ -15,13 +15,16 @@ export default Discourse.Route.extend({
       Discourse.logout();
     },
 
-    composePrivateMessage: function(user) {
+    composePrivateMessage: function(user, post) {
-      var recipient = user ? user.get('username') : '';
+      var recipient = user ? user.get('username') : '',
+          reply = post ? window.location.protocol + "//" + window.location.host + post.get("url") : null
+          
       return this.controllerFor('composer').open({
         action: Discourse.Composer.PRIVATE_MESSAGE,
         usernames: recipient,
         archetypeId: 'private_message',
-        draftKey: 'new_private_message'
+        draftKey: 'new_private_message',
+        reply: reply
       });
     },
 

app/assets/javascripts/discourse/templates/user-card.hbs

@@ -24,7 +24,7 @@
 
   <ul class="usercard-controls">
     {{#if user.can_send_private_message_to_user}}
-      <li><a class='btn btn-primary' {{action "composePrivateMessage" user}}>{{fa-icon "envelope"}}{{i18n 'user.private_message'}}</a></li>
+      <li><a class='btn btn-primary' {{action "composePrivateMessage" user post}}>{{fa-icon "envelope"}}{{i18n 'user.private_message'}}</a></li>
     {{/if}}
 
     {{#if showFilter}}

app/assets/javascripts/discourse/views/user-card.js.es6

@@ -43,8 +43,9 @@ export default Discourse.View.extend(CleansUp, {
     });
 
     var expand = function(username, $target){
+      var postId = $target.parents('article').data('post-id');
       self._willShow($target);
-      self.get('controller').show(username, $target[0]);
+      self.get('controller').show(username, postId, $target[0]);
       return false;
     };