[Offline pages] Adding AddRequestTask to Request Queue

components/offline_pages/background/add_request_task.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef COMPONENTS_OFFLINE_PAGES_BACKGROUND_ADD_REQUEST_TASK_H_
+#define COMPONENTS_OFFLINE_PAGES_BACKGROUND_ADD_REQUEST_TASK_H_
+
+#include <memory>
+#include <vector>
+
+#include "base/memory/weak_ptr.h"
+#include "components/offline_pages/background/request_queue_store.h"
+#include "components/offline_pages/core/task.h"
+
+namespace offline_pages {
+
+class AddRequestTask : public Task {
+ public:
+  AddRequestTask(RequestQueueStore* store,
+                 const SavePageRequest& request,
+                 const RequestQueueStore::AddCallback& callback);
+  ~AddRequestTask() override;
+
+  // Task implementation:
+  void Run() override;
+
+ private:
+  // Step 1: Add the request to the store.
+  void AddRequest();
+  // Step 2: Calls the callback with result, completes the task.
+  void CompleteWithResult(ItemActionStatus status);
+
+  // Store from which requests will be read.
+  RequestQueueStore* store_;
+  // Request to be added.
+  SavePageRequest request_;
+  // Callback used to return the read results.
+  RequestQueueStore::AddCallback callback_;
+
+  base::WeakPtrFactory<AddRequestTask> weak_ptr_factory_;
+  DISALLOW_COPY_AND_ASSIGN(AddRequestTask);
+};
+
+}  // namespace offline_pages
+
+#endif  // COMPONENTS_OFFLINE_PAGES_BACKGROUND_ADD_REQUEST_TASK_H_