commit ed908f2b1dd229b228d5ce9a9ade064c1c9bc803
Author: Marius BĂLTEANU <marius.balteanu@zitec.com>
Date:   Mon Sep 8 23:46:56 2025 +0300

    WIP

diff --git a/app/models/journal.rb b/app/models/journal.rb
index 12f2beec8..9b3cadb64 100644
--- a/app/models/journal.rb
+++ b/app/models/journal.rb
@@ -354,6 +354,14 @@ class Journal < ApplicationRecord
         !Watcher.any_watched?(Array.wrap(journalized), user)
       journalized.set_watcher(user, true)
     end
+
+    previous_assignee = journalized.previous_assignee
+    if previous_assignee.is_a?(User) && previous_assignee&.active? &&
+        previous_assignee.allowed_to?(:add_issue_watchers, project) &&
+        previous_assignee.pref.auto_watch_on?('issue_previous_assigned_to_me') &&
+        !Watcher.any_watched?(Array.wrap(journalized), previous_assignee)
+      journalized.set_watcher(previous_assignee, true)
+    end
   end
 
   def send_notification
diff --git a/app/models/user_preference.rb b/app/models/user_preference.rb
index fc1c3829b..7dec4a7f8 100644
--- a/app/models/user_preference.rb
+++ b/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_previous_assigned_to_me]
 
   def initialize(attributes=nil, *args)
     super
diff --git a/config/locales/en.yml b/config/locales/en.yml
index c114634a3..a240bdf25 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -993,6 +993,7 @@ 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_previous_assigned_to_me: Issues previous assigned to me
   label_preferences: Preferences
   label_chronological_order: In chronological order
   label_reverse_chronological_order: In reverse chronological order