Return workflow list data in workflows endpoint

[MAILPOET-4287]

mailpoet/lib/Automation/Engine/Endpoints/Workflows/WorkflowsGetEndpoint.php

@@ -2,12 +2,37 @@
 
 namespace MailPoet\Automation\Engine\Endpoints\Workflows;
 
+use DateTimeImmutable;
 use MailPoet\Automation\Engine\API\Endpoint;
 use MailPoet\Automation\Engine\API\Request;
 use MailPoet\Automation\Engine\API\Response;
+use MailPoet\Automation\Engine\Storage\WorkflowStorage;
+use MailPoet\Automation\Engine\Workflows\Workflow;
 
 class WorkflowsGetEndpoint extends Endpoint {
+  /** @var WorkflowStorage */
+  private $workflowStorage;
+
+  public function __construct(
+    WorkflowStorage $workflowStorage
+  ) {
+    $this->workflowStorage = $workflowStorage;
+  }
+
   public function handle(Request $request): Response {
-    return new Response(['message' => 'Hello world.']);
+    $workflows = $this->workflowStorage->getWorkflows();
+    return new Response(array_map(function (Workflow $workflow) {
+      return $this->buildWorkflow($workflow);
+    }, $workflows));
+  }
+
+  private function buildWorkflow(Workflow $workflow): array {
+    return [
+      'id' => $workflow->getId(),
+      'name' => $workflow->getName(),
+      'status' => $workflow->getStatus(),
+      'created_at' => $workflow->getCreatedAt()->format(DateTimeImmutable::W3C),
+      'updated_at' => $workflow->getUpdatedAt()->format(DateTimeImmutable::W3C),
+    ];
   }
 }

mailpoet/tests/integration/REST/Automation/Workflows/WorkflowsGetTest.php

@@ -22,6 +22,6 @@ class WorkflowsGetTest extends AutomationTest {
 
   public function testRequest(): void {
     $data = $this->get(self::ENDPOINT_PATH);
-    $this->assertSame(['data' => ['message' => 'Hello world.']], $data);
+    $this->assertSame(['data' => []], $data);
   }
 }