Implement notifications

ember/app/models/discussion.js

@@ -2,8 +2,9 @@ import Ember from 'ember';
 import DS from 'ember-data';
 
 import HasItemLists from 'flarum/mixins/has-item-lists';
+import Subject from './subject';
 
-export default DS.Model.extend(HasItemLists, {
+export default Subject.extend(HasItemLists, {
   /**
     Define a "badges" item list. Example usage:
     ```

ember/app/models/notification.js

@@ -0,0 +1,21 @@
+import DS from 'ember-data';
+
+export default DS.Model.extend({
+  contentType: DS.attr('string'),
+  subjectId: DS.attr('number'),
+  content: DS.attr(),
+  time: DS.attr('date'),
+  isRead: DS.attr('boolean'),
+  unreadCount: DS.attr('number'),
+  additionalUnreadCount: Ember.computed('unreadCount', function() {
+    return Math.max(0, this.get('unreadCount') - 1);
+  }),
+
+  decodedContent: Ember.computed('content', function() {
+    return JSON.parse(this.get('content'));
+  }),
+
+  user: DS.belongsTo('user'),
+  sender: DS.belongsTo('user'),
+  subject: DS.belongsTo('subject', {polymorphic: true})
+});

ember/app/models/post.js

@@ -1,7 +1,8 @@
 import Ember from 'ember';
 import DS from 'ember-data';
+import Subject from './subject';
 
-export default DS.Model.extend({
+export default Subject.extend({
   discussion: DS.belongsTo('discussion', {inverse: 'loadedPosts'}),
   number: DS.attr('number'),
 

ember/app/models/subject.js

@@ -0,0 +1,5 @@
+import DS from 'ember-data';
+
+export default DS.Model.extend({
+  notification: DS.belongsTo('notification')
+});

ember/app/models/user.js

@@ -18,6 +18,7 @@ export default DS.Model.extend(HasItemLists, {
   joinTime: DS.attr('date'),
   lastSeenTime: DS.attr('date'),
   readTime: DS.attr('date'),
+  unreadNotificationsCount: DS.attr('number'),
 
   discussionsCount: DS.attr('number'),
   commentsCount: DS.attr('number'),