1 files changed, 46 insertions, 0 deletions
diff --git a/app/services/feature_flags/disable_service.rb b/app/services/feature_flags/disable_service.rb
new file mode 100644
index 00000000000..8a443ac1795
--- /dev/null
+++ b/app/services/feature_flags/disable_service.rb
@@ -0,0 +1,46 @@
+# frozen_string_literal: true
+
+module FeatureFlags
+  class DisableService < BaseService
+    def execute
+      return error('Feature Flag not found', 404) unless feature_flag_by_name
+      return error('Feature Flag Scope not found', 404) unless feature_flag_scope_by_environment_scope
+      return error('Strategy not found', 404) unless strategy_exist_in_persisted_data?
+
+      ::FeatureFlags::UpdateService
+        .new(project, current_user, update_params)
+        .execute(feature_flag_by_name)
+    end
+
+    private
+
+    def update_params
+      if remaining_strategies.empty?
+        params_to_destroy_scope
+      else
+        params_to_update_scope
+      end
+    end
+
+    def remaining_strategies
+      strong_memoize(:remaining_strategies) do
+        feature_flag_scope_by_environment_scope.strategies.reject do |strategy|
+          strategy['name'] == params[:strategy]['name'] &&
+            strategy['parameters'] == params[:strategy]['parameters']
+        end
+      end
+    end
+
+    def strategy_exist_in_persisted_data?
+      feature_flag_scope_by_environment_scope.strategies != remaining_strategies
+    end
+
+    def params_to_destroy_scope
+      { scopes_attributes: [{ id: feature_flag_scope_by_environment_scope.id, _destroy: true }] }
+    end
+
+    def params_to_update_scope
+      { scopes_attributes: [{ id: feature_flag_scope_by_environment_scope.id, strategies: remaining_strategies }] }
+    end
+  end
+end