Resource event model

1 files changed, 43 insertions, 0 deletions

diff --git a/app/services/resource_events/change_labels_service.rb b/app/services/resource_events/change_labels_service.rb
new file mode 100644
index 00000000000..8edb0ddb3ed
--- /dev/null
+++ b/app/services/resource_events/change_labels_service.rb
@@ -0,0 +1,43 @@
+# frozen_string_literal: true
+
+# This service is not used yet, it will be used for:
+# https://gitlab.com/gitlab-org/gitlab-ce/issues/48483
+module ResourceEvents
+  class ChangeLabelsService
+    attr_reader :resource, :user
+
+    def initialize(resource, user)
+      @resource, @user = resource, user
+    end
+
+    def execute(added_labels: [], removed_labels: [])
+      label_hash = {
+        resource_column(resource) => resource.id,
+        user_id: user.id,
+        created_at: Time.now
+      }
+
+      labels = added_labels.map do |label|
+        label_hash.merge(label_id: label.id, action: ResourceLabelEvent.actions['add'])
+      end
+      labels += removed_labels.map do |label|
+        label_hash.merge(label_id: label.id, action: ResourceLabelEvent.actions['remove'])
+      end
+
+      Gitlab::Database.bulk_insert(ResourceLabelEvent.table_name, labels)
+    end
+
+    private
+
+    def resource_column(resource)
+      case resource
+      when Issue
+        :issue_id
+      when MergeRequest
+        :merge_request_id
+      else
+        raise ArgumentError, "Unknown resource type #{resource.class.name}"
+      end
+    end
+  end
+end