Merge pull request #181 from MartinGoulet/notifications

Create a notification when creating a note

app/controllers/socializer/notes_controller.rb

@@ -13,6 +13,7 @@ def create
       @note.activity_verb = 'post'
       @note.save!
       @activity = Activity.find_by(activity_object_id: @note.guid)
+      Notification.create_for_activity(@activity)
       respond_to do |format|
         format.js
       end

app/models/socializer/notification.rb

@@ -3,6 +3,8 @@ class Notification < ActiveRecord::Base
     # Increment the number of unread notifications
     after_save { activity_object.increment_unread_notifications_count }
 
+    default_scope { order(created_at: :desc) }
+
     attr_accessible :read
 
     # Relationships
@@ -12,5 +14,41 @@ class Notification < ActiveRecord::Base
     # Validations
     validates :activity_id, presence: true
     validates :activity_object_id, presence: true
+
+    def self.create_for_activity(activity)
+      # Get all ties related to the audience of the activity
+      potential_contact_id = get_potential_contact_id(activity.id)
+      potential_contact_id.each do |t|
+        # If the contact has the author of the activity in one of his circle.
+        if has_person_into_circle(t.contact_id, activity.activitable_actor.id)
+          create_notification(activity, t.contact_id)
+        end
+      end
+    end
+
+    private
+
+    def self.create_notification(activity, contact_id)
+      n = Notification.new
+      n.activity = activity
+      n.activity_object = ActivityObject.find_by(id: contact_id)
+      n.save!
+    end
+
+    def self.get_potential_contact_id(activity_id)
+      # Activity -> Audience -> ActivityObject -> Circle -> Tie -> contact_id
+      Tie.select { contact_id
+        }.joins  { circle.activity_object.audiences
+        }.where  { circle.activity_object.audiences.activity_id.eq( activity_id ) }.flatten.uniq
+    end
+
+    def self.has_person_into_circle(parent_contact_id, child_contact_id)
+      # ActivityObject.id = parent_contact_id
+      # ActivityObject -> Circle -> Tie -> contact_id = child_contact_id
+      ActivityObject.select { id
+                   }.joins  { circles.ties
+                   }.where  { id.eq(parent_contact_id) & circles.ties.contact_id.eq(child_contact_id)
+                   }.first.present?
+    end
   end
 end

app/views/socializer/notifications/index.html.erb

@@ -21,7 +21,8 @@
         <div class="notification-body">
           <div>
             <span class="person-name"><%= n.activity.actor.display_name %></span>
-            <span><%= n.activity.verb.name %></span>
+            <span><%= 'has %s ' % n.activity.verb.name %></span>
+            <span><%= 'a note' if n.activity.activitable_object.note? %></span>
           </div>
           <div class="time-elapsed"><%= time_ago(n.created_at) %></div>
         </div>