Add latest changes from gitlab-org/gitlab@14-4-stable-eev14.4.0-rc42

3 files changed, 96 insertions, 0 deletions

diff --git a/lib/gitlab/merge_requests/mergeability/check_result.rb b/lib/gitlab/merge_requests/mergeability/check_result.rb
new file mode 100644
index 00000000000..d0788c7d7c7
--- /dev/null
+++ b/lib/gitlab/merge_requests/mergeability/check_result.rb
@@ -0,0 +1,48 @@
+# frozen_string_literal: true
+module Gitlab
+  module MergeRequests
+    module Mergeability
+      class CheckResult
+        SUCCESS_STATUS = :success
+        FAILED_STATUS = :failed
+
+        attr_reader :status, :payload
+
+        def self.default_payload
+          { last_run_at: Time.current }
+        end
+
+        def self.success(payload: {})
+          new(status: SUCCESS_STATUS, payload: default_payload.merge(payload))
+        end
+
+        def self.failed(payload: {})
+          new(status: FAILED_STATUS, payload: default_payload.merge(payload))
+        end
+
+        def self.from_hash(data)
+          new(
+            status: data.fetch(:status),
+            payload: data.fetch(:payload))
+        end
+
+        def initialize(status:, payload: {})
+          @status = status
+          @payload = payload
+        end
+
+        def to_hash
+          { status: status, payload: payload }
+        end
+
+        def failed?
+          status == FAILED_STATUS
+        end
+
+        def success?
+          status == SUCCESS_STATUS
+        end
+      end
+    end
+  end
+end
diff --git a/lib/gitlab/merge_requests/mergeability/redis_interface.rb b/lib/gitlab/merge_requests/mergeability/redis_interface.rb
new file mode 100644
index 00000000000..081ccfca360
--- /dev/null
+++ b/lib/gitlab/merge_requests/mergeability/redis_interface.rb
@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+module Gitlab
+  module MergeRequests
+    module Mergeability
+      class RedisInterface
+        EXPIRATION = 6.hours
+        VERSION = 1
+
+        def save_check(merge_check:, result_hash:)
+          Gitlab::Redis::SharedState.with do |redis|
+            redis.set(merge_check.cache_key + ":#{VERSION}", result_hash.to_json, ex: EXPIRATION)
+          end
+        end
+
+        def retrieve_check(merge_check:)
+          Gitlab::Redis::SharedState.with do |redis|
+            Gitlab::Json.parse(redis.get(merge_check.cache_key + ":#{VERSION}"))
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/lib/gitlab/merge_requests/mergeability/results_store.rb b/lib/gitlab/merge_requests/mergeability/results_store.rb
new file mode 100644
index 00000000000..bb6489f8526
--- /dev/null
+++ b/lib/gitlab/merge_requests/mergeability/results_store.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+module Gitlab
+  module MergeRequests
+    module Mergeability
+      class ResultsStore
+        def initialize(interface: RedisInterface.new, merge_request:)
+          @interface = interface
+          @merge_request = merge_request
+        end
+
+        def read(merge_check:)
+          interface.retrieve_check(merge_check: merge_check)
+        end
+
+        def write(merge_check:, result_hash:)
+          interface.save_check(merge_check: merge_check, result_hash: result_hash)
+        end
+
+        private
+
+        attr_reader :interface
+      end
+    end
+  end
+end