FEATURE: add trigger_with_pms option to topic tags changed automation trigger (#29122)

plugins/automation/spec/triggers/topic_tags_changed_spec.rb

@@ -19,6 +19,7 @@ describe DiscourseAutomation::Triggers::TOPIC_TAGS_CHANGED do
     SiteSetting.tagging_enabled = true
     SiteSetting.create_tag_allowed_groups = Group::AUTO_GROUPS[:everyone]
     SiteSetting.tag_topic_allowed_groups = Group::AUTO_GROUPS[:everyone]
+    SiteSetting.pm_tags_allowed_for_groups = Group::AUTO_GROUPS[:everyone]
   end
 
   context "when watching a cool tag" do
@@ -185,5 +186,38 @@ describe DiscourseAutomation::Triggers::TOPIC_TAGS_CHANGED do
       expect(list[0]["added_tags"]).to eq([another_tag.name])
       expect(list[0]["removed_tags"]).to eq([])
     end
+
+    it "should not fire the trigger on PMs by default" do
+      pm = Fabricate(:private_message_topic)
+      list =
+        capture_contexts do
+          DiscourseTagging.tag_topic_by_names(
+            pm,
+            Guardian.new(user),
+            [cool_tag.name, another_tag.name],
+          )
+        end
+      expect(list.length).to eq(0)
+    end
+
+    it "should fire the trigger on PMs if trigger_with_pms is set" do
+      automation.upsert_field!(
+        "trigger_with_pms",
+        "boolean",
+        { "value" => true },
+        target: "trigger",
+      )
+
+      pm = Fabricate(:private_message_topic)
+      list =
+        capture_contexts do
+          DiscourseTagging.tag_topic_by_names(
+            pm,
+            Guardian.new(user),
+            [cool_tag.name, another_tag.name],
+          )
+        end
+      expect(list.length).to eq(1)
+    end
   end
 end