Add user option to auto-watch issues previously assigned to me (#2716).

git-svn-id: https://svn.redmine.org/redmine/trunk@24312 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/journal.rb

@@ -354,6 +354,14 @@ class Journal < ApplicationRecord
         !Watcher.any_watched?(Array.wrap(journalized), user)
       journalized.set_watcher(user, true)
     end
+
+    assignee = journalized.assigned_to
+    if assignee.is_a?(User) && assignee&.active? &&
+       assignee.allowed_to?(:add_issue_watchers, project) &&
+       assignee.pref.auto_watch_on?('issue_assigned_to_me') &&
+        !Watcher.any_watched?(Array.wrap(journalized), assignee)
+      journalized.set_watcher(assignee, true)
+    end
   end
 
   def send_notification

app/models/user_preference.rb

@@ -44,7 +44,7 @@ class UserPreference < ApplicationRecord
 
   TEXTAREA_FONT_OPTIONS = ['monospace', 'proportional']
   DEFAULT_TOOLBAR_LANGUAGE_OPTIONS = %w[c cpp csharp css diff go groovy html java javascript objc perl php python r ruby sass scala shell sql swift xml yaml]
-  AUTO_WATCH_ON_OPTIONS = %w[issue_created issue_contributed_to]
+  AUTO_WATCH_ON_OPTIONS = %w[issue_created issue_contributed_to issue_assigned_to_me]
 
   def initialize(attributes=nil, *args)
     super

config/locales/en.yml

@@ -996,6 +996,7 @@ en:
   label_auto_watch_on: Auto watch
   label_auto_watch_on_issue_created: Issues I created
   label_auto_watch_on_issue_contributed_to: Issues I contributed to
+  label_auto_watch_on_issue_assigned_to_me: Issues assigned to me
   label_preferences: Preferences
   label_chronological_order: In chronological order
   label_reverse_chronological_order: In reverse chronological order