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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_COMPONENT_UPDATER_UPDATE_CHECKER_H_
      6 #define CHROME_BROWSER_COMPONENT_UPDATER_UPDATE_CHECKER_H_
      7 
      8 #include <string>
      9 #include <vector>
     10 
     11 #include "base/basictypes.h"
     12 #include "base/callback.h"
     13 #include "base/memory/scoped_ptr.h"
     14 #include "chrome/browser/component_updater/update_response.h"
     15 
     16 class GURL;
     17 
     18 namespace net {
     19 class URLRequestContextGetter;
     20 }
     21 
     22 namespace component_updater {
     23 
     24 struct CrxUpdateItem;
     25 
     26 class UpdateChecker {
     27  public:
     28   typedef base::Callback<void(int error,
     29                               const std::string& error_message,
     30                               const UpdateResponse::Results& results)>
     31       UpdateCheckCallback;
     32 
     33   virtual ~UpdateChecker() {}
     34 
     35   // Initiates an update check for the |items_to_check|. |additional_attributes|
     36   // provides a way to customize the <request> element. This value is inserted
     37   // as-is, therefore it must be well-formed as an XML attribute string.
     38   virtual bool CheckForUpdates(
     39       const std::vector<CrxUpdateItem*>& items_to_check,
     40       const std::string& additional_attributes) = 0;
     41 
     42   static scoped_ptr<UpdateChecker> Create(
     43       const GURL& url,
     44       net::URLRequestContextGetter* url_request_context_getter,
     45       const UpdateCheckCallback& update_check_callback);
     46 
     47  protected:
     48   UpdateChecker() {}
     49 
     50  private:
     51   DISALLOW_COPY_AND_ASSIGN(UpdateChecker);
     52 };
     53 
     54 }  // namespace component_updater
     55 
     56 #endif  // CHROME_BROWSER_COMPONENT_UPDATER_UPDATE_CHECKER_H_
     57