[Offline pages] Implementation of RequestQueue: Add, Remove, Get

components/offline_pages/background/request_queue.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_REQUEST_QUEUE_H_
 #define COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_QUEUE_H_
 
 #include <stdint.h>
+
+#include <memory>
 #include <vector>
 
 #include "base/callback.h"
+#include "base/macros.h"
 
 namespace offline_pages {
 
+class RequestQueueStore;
 class SavePageRequest;
 
 // Class responsible for managing save page requests.
 class RequestQueue {
  public:
   enum class GetRequestsResult {
     kSuccess,
     kStoreFailure,
   };
 
@@ skipping 16 matching lines @@
                               const std::vector<SavePageRequest>&)>
       GetRequestsCallback;
 
   // Callback used for |AddRequest|.
   typedef base::Callback<void(AddRequestResult, const SavePageRequest& request)>
       AddRequestCallback;
 
   // Callback used by |UdpateRequest| and |RemoveRequest|.
   typedef base::Callback<void(UpdateRequestResult)> UpdateRequestCallback;
 
+  explicit RequestQueue(std::unique_ptr<RequestQueueStore> store);
+  ~RequestQueue();
+
   // Gets all of the active requests from the store. Calling this method may
   // schedule purging of the request queue.
   void GetRequests(const GetRequestsCallback& callback);
 
   // Adds |request| to the request queue. Result is returned through |callback|.
   // In case adding the request violates policy, the result will fail with
   // appropriate result. Callback will also return a copy of a request with all
   // fields set.
   void AddRequest(const SavePageRequest& request,
                   const AddRequestCallback& callback);
@@ skipping 10 matching lines @@
  private:
   // Callback used by |PurgeRequests|.
   typedef base::Callback<void(UpdateRequestResult,
                               int /* removed requests count */)>
       PurgeRequestsCallback;
 
   // Purges the queue, removing the requests that are no longer relevant, e.g.
   // expired request. Result is returned through |callback| carries the number
   // of removed requests.
   void PurgeRequests(const PurgeRequestsCallback& callback);
+
+  std::unique_ptr<RequestQueueStore> store_;
+
+  DISALLOW_COPY_AND_ASSIGN(RequestQueue);
 };
 
 }  // namespace offline_pages
 
 #endif  // COMPONENTS_OFFLINE_PAGES_BACKGROUND_REQUEST_QUEUE_H_