1 files changed, 39 insertions, 0 deletions
diff --git a/app/models/integrations/base_third_party_wiki.rb b/app/models/integrations/base_third_party_wiki.rb
new file mode 100644
index 00000000000..24f5bec93cf
--- /dev/null
+++ b/app/models/integrations/base_third_party_wiki.rb
@@ -0,0 +1,39 @@
+# frozen_string_literal: true
+
+module Integrations
+  class BaseThirdPartyWiki < Integration
+    default_value_for :category, 'third_party_wiki'
+
+    validate :only_one_third_party_wiki, if: :activated?, on: :manual_change
+
+    after_commit :cache_project_has_integration
+
+    def self.supported_events
+      %w()
+    end
+
+    private
+
+    def only_one_third_party_wiki
+      return unless project_level?
+
+      if project.integrations.third_party_wikis.id_not_in(id).any?
+        errors.add(:base, _('Another third-party wiki is already in use. '\
+                            'Only one third-party wiki integration can be active at a time'))
+      end
+    end
+
+    def cache_project_has_integration
+      return unless project && !project.destroyed?
+
+      project_setting = project.project_setting
+
+      project_setting.public_send("#{project_settings_cache_key}=", active?) # rubocop:disable GitlabSecurity/PublicSend
+      project_setting.save!
+    end
+
+    def project_settings_cache_key
+      "has_#{self.class.to_param}"
+    end
+  end
+end