Move ci_environments_status to a model

GET :namespace/merge_requests/:id/ci_environments_status complexity
already reached a limit for a direct serialization from an hash
computed at within the controller function.

Here we introduce a virtual model EnvironmentStatus and its serializer.

1 files changed, 27 insertions, 0 deletions

diff --git a/app/models/environment_status.rb b/app/models/environment_status.rb
new file mode 100644
index 00000000000..cae0d396089
--- /dev/null
+++ b/app/models/environment_status.rb
@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+class EnvironmentStatus
+  include Gitlab::Utils::StrongMemoize
+
+  attr_reader :environment, :merge_request
+
+  delegate :id, to: :environment
+  delegate :name, to: :environment
+  delegate :project, to: :environment
+  delegate :deployed_at, to: :deployment, allow_nil: true
+
+  def initialize(environment, merge_request)
+    @environment = environment
+    @merge_request = merge_request
+  end
+
+  def deployment
+    strong_memoize(:deployment) do
+      environment.first_deployment_for(merge_request.diff_head_sha)
+    end
+  end
+
+  def deployed_at
+    deployment&.created_at
+  end
+end