New feature: add 'Mention' notification level

It does disable all emails expect system one or when you was @mentioned
Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/models/notification.rb

@@ -6,12 +6,13 @@ class Notification
   N_PARTICIPATING = 1
   N_WATCH = 2
   N_GLOBAL = 3
+  N_MENTION = 4
 
   attr_accessor :target
 
   class << self
     def notification_levels
-      [N_DISABLED, N_PARTICIPATING, N_WATCH]
+      [N_DISABLED, N_PARTICIPATING, N_WATCH, N_MENTION]
     end
 
     def options_with_labels
@@ -19,12 +20,13 @@ class Notification
         disabled: N_DISABLED,
         participating: N_PARTICIPATING,
         watch: N_WATCH,
+        mention: N_MENTION,
         global: N_GLOBAL
       }
     end
 
     def project_notification_levels
-      [N_DISABLED, N_PARTICIPATING, N_WATCH, N_GLOBAL]
+      [N_DISABLED, N_PARTICIPATING, N_WATCH, N_GLOBAL, N_MENTION]
     end
   end
 
@@ -48,6 +50,10 @@ class Notification
     target.notification_level == N_GLOBAL
   end
 
+  def mention?
+    target.notification_level == N_MENTION
+  end
+
   def level
     target.notification_level
   end

app/services/notification_service.rb

@@ -144,6 +144,10 @@ class NotificationService
     # Merge project watchers
     recipients = recipients.concat(project_watchers(note.project)).compact.uniq
 
+    # Reject mention users unless mentioned in comment
+    recipients = reject_mention_users(recipients - note.mentioned_users, note.project)
+    recipients = recipients + note.mentioned_users
+
     # Reject mutes users
     recipients = reject_muted_users(recipients, note.project)
 
@@ -285,13 +289,39 @@ class NotificationService
     end
   end
 
+  # Remove users with notification level 'Mentioned'
+  def reject_mention_users(users, project = nil)
+    users = users.to_a.compact.uniq
+
+    users.reject do |user|
+      next user.notification.mention? unless project
+
+      tm = project.project_members.find_by(user_id: user.id)
+
+      if !tm && project.group
+        tm = project.group.group_members.find_by(user_id: user.id)
+      end
+
+      # reject users who globally set mention notification and has no membership
+      next user.notification.mention? unless tm
+
+      # reject users who set mention notification in project
+      next true if tm.notification.mention?
+
+      # reject users who have N_MENTION in project and disabled in global settings
+      tm.notification.global? && user.notification.mention?
+    end
+  end
+
   def new_resource_email(target, project, method)
     if target.respond_to?(:participants)
       recipients = target.participants
     else
       recipients = []
     end
+
     recipients = reject_muted_users(recipients, project)
+    recipients = reject_mention_users(recipients, project)
     recipients = recipients.concat(project_watchers(project)).uniq
     recipients.delete(target.author)
 
@@ -302,6 +332,7 @@ class NotificationService
 
   def close_resource_email(target, project, current_user, method)
     recipients = reject_muted_users([target.author, target.assignee], project)
+    recipients = reject_mention_users(recipients, project)
     recipients = recipients.concat(project_watchers(project)).uniq
     recipients.delete(current_user)
 
@@ -320,6 +351,7 @@ class NotificationService
 
     # reject users with disabled notifications
     recipients = reject_muted_users(recipients, project)
+    recipients = reject_mention_users(recipients, project)
 
     # Reject me from recipients if I reassign an item
     recipients.delete(current_user)
@@ -331,6 +363,7 @@ class NotificationService
 
   def reopen_resource_email(target, project, current_user, method, status)
     recipients = reject_muted_users([target.author, target.assignee], project)
+    recipients = reject_mention_users(recipients, project)
     recipients = recipients.concat(project_watchers(project)).uniq
     recipients.delete(current_user)
 

app/views/profiles/notifications/show.html.haml

@@ -15,6 +15,13 @@
           Disabled
         %p You will not get any notifications via email
 
+    .radio
+      = label_tag nil, class: '' do
+        = radio_button_tag :notification_level, Notification::N_MENTION, @notification.mention?, class: 'trigger-submit'
+        .level-title
+          Mention
+        %p You will receive notifications only for comments where you was @mentioned
+
     .radio
       = label_tag nil, class: '' do
         = radio_button_tag :notification_level, Notification::N_PARTICIPATING, @notification.participating?, class: 'trigger-submit'

spec/services/notification_service_spec.rb

@@ -116,6 +116,7 @@ describe NotificationService do
           should_email(note.noteable.assignee_id)
 
           should_not_email(note.author_id)
+          should_not_email(@u_mentioned.id)
           should_not_email(@u_disabled.id)
           should_not_email(@u_not_mentioned.id)
           notification.new_note(note)
@@ -168,6 +169,12 @@ describe NotificationService do
           notification.new_note(note)
         end
 
+        it do
+          @u_committer.update_attributes(notification_level: Notification::N_MENTION)
+          should_not_email(@u_committer.id, note)
+          notification.new_note(note)
+        end
+
         def should_email(user_id, n)
           Notify.should_receive(:note_commit_email).with(user_id, n.id)
         end
@@ -190,11 +197,18 @@ describe NotificationService do
       it do
         should_email(issue.assignee_id)
         should_email(@u_watcher.id)
+        should_not_email(@u_mentioned.id)
         should_not_email(@u_participating.id)
         should_not_email(@u_disabled.id)
         notification.new_issue(issue, @u_disabled)
       end
 
+      it do
+        issue.assignee.update_attributes(notification_level: Notification::N_MENTION)
+        should_not_email(issue.assignee_id)
+        notification.new_issue(issue, @u_disabled)
+      end
+
       def should_email(user_id)
         Notify.should_receive(:new_issue_email).with(user_id, issue.id)
       end
@@ -391,7 +405,7 @@ describe NotificationService do
     @u_watcher = create(:user, notification_level: Notification::N_WATCH)
     @u_participating = create(:user, notification_level: Notification::N_PARTICIPATING)
     @u_disabled = create(:user, notification_level: Notification::N_DISABLED)
-    @u_mentioned = create(:user, username: 'mention', notification_level: Notification::N_PARTICIPATING)
+    @u_mentioned = create(:user, username: 'mention', notification_level: Notification::N_MENTION)
     @u_committer = create(:user, username: 'committer')
     @u_not_mentioned = create(:user, username: 'regular', notification_level: Notification::N_PARTICIPATING)