Prefetching: Introduce store commands abstractions to be used by tasks.

components/offline_pages/core/prefetch/store/add_urls_store_command.h

+// Copyright 2017 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_CORE_PREFETCH_STORE_ADD_URLS_STORE_COMMAND_H_
+#define COMPONENTS_OFFLINE_PAGES_CORE_PREFETCH_STORE_ADD_URLS_STORE_COMMAND_H_
+
+#include <string>
+#include <vector>
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "components/offline_pages/core/prefetch/prefetch_types.h"
+
+namespace offline_pages {
+
+// Adds new entries to the store representing new suggestions of pages to be
+// prefecthed.
+class AddUrlsStoreCommand {
+ public:
+  using UrlsAddedCallback = base::OnceCallback<void(bool success)>;
+
+  AddUrlsStoreCommand(){};
+  virtual ~AddUrlsStoreCommand(){};
+
+  // Adds new entries using the URLs and client IDs from |prefetch_urls| into
+  // the assigned client |name_space|. Will run |callback| when done with the
+  // final |success| result.
+  virtual void Execute(const std::string& name_space,
+                       const std::vector<PrefetchURL>& prefetch_urls,
+                       UrlsAddedCallback callback) = 0;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(AddUrlsStoreCommand);
+};
+
+}  // namespace offline_pages
+
+#endif  // COMPONENTS_OFFLINE_PAGES_CORE_PREFETCH_STORE_ADD_URLS_STORE_COMMAND_H_