Stop showing first notification prompt once user sees the notification.

app/models/notification.rb

@@ -56,7 +56,6 @@ class Notification < ActiveRecord::Base
       .update_all("read = 't'")
 
     if count > 0
-      user.mark_first_notification_read
       user.publish_notifications_state
     end
 
@@ -69,7 +68,6 @@ class Notification < ActiveRecord::Base
                                read: false).update_all(read: true)
 
     if count > 0
-      user.mark_first_notification_read
       user.publish_notifications_state
     end
   end

app/models/user.rb

@@ -345,22 +345,6 @@ class User < ActiveRecord::Base
 
   TRACK_FIRST_NOTIFICATION_READ_DURATION = 1.week.to_i
 
-  def self.first_notification_read_key(user)
-    "#{user.id}:first-notification-read"
-  end
-
-  def mark_first_notification_read
-    first_notification_read_key = User.first_notification_read_key(self)
-
-    if !$redis.get(first_notification_read_key)
-      $redis.setex(
-        first_notification_read_key,
-        User::TRACK_FIRST_NOTIFICATION_READ_DURATION,
-        1
-      )
-    end
-  end
-
   def read_first_notification?
     if (trust_level > TrustLevel[0] ||
         created_at < TRACK_FIRST_NOTIFICATION_READ_DURATION.seconds.ago)
@@ -368,7 +352,7 @@ class User < ActiveRecord::Base
       return true
     end
 
-    !!$redis.get(self.class.first_notification_read_key(self))
+    self.seen_notification_id == 0 ? false : true
   end
 
   def publish_notifications_state

spec/models/user_spec.rb

@@ -1319,49 +1319,21 @@ describe User do
 
   describe '#read_first_notification?' do
     let(:user) { Fabricate(:user, trust_level: TrustLevel[0]) }
-    let(:post) { Fabricate(:post) }
+    let(:notification) { Fabricate(:private_message_notification) }
-    let(:topic) { Fabricate(:topic, first_post: post) }
 
-    let(:notification) do
+    describe 'when first notification has not been seen' do
-      Fabricate(:private_message_notification,
-        user: user, read: false, topic: topic, post_number: post.post_number
-      )
-    end
-
-    after do
-      $redis.del(User.first_notification_read_key(user))
-    end
-
-    describe 'when first notification has not been read' do
       it 'should return the right value' do
         expect(user.read_first_notification?).to eq(false)
       end
     end
 
-    describe 'when first notification has been read' do
+    describe 'when first notification has been seen' do
       it 'should return the right value' do
-        notification
+        user.update_attributes!(seen_notification_id: notification.id)
-        Notification.read(user, [notification.id])
-
         expect(user.reload.read_first_notification?).to eq(true)
       end
     end
 
-    describe 'when post has been read' do
-      it 'should return the right value' do
-        notification
-        Notification.mark_posts_read(user, notification.topic_id, [1])
-
-        expect(user.read_first_notification?).to eq(true)
-      end
-    end
-
-    describe 'when user does not have any notifications' do
-      it 'should return the right value' do
-        expect(user.read_first_notification?).to eq(false)
-      end
-    end
-
     describe 'when user is not trust level 0' do
       it 'should return the right value' do
         user.update_attributes!(trust_level: TrustLevel[1])