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      1 // Copyright 2013 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_SYNC_FILE_SYSTEM_DRIVE_BACKEND_DRIVE_BACKEND_UTIL_H_
      6 #define CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_DRIVE_BACKEND_UTIL_H_
      7 
      8 #include <string>
      9 
     10 #include "base/bind.h"
     11 #include "base/callback.h"
     12 #include "base/memory/scoped_ptr.h"
     13 #include "base/memory/scoped_vector.h"
     14 #include "chrome/browser/sync_file_system/drive_backend/metadata_database.pb.h"
     15 #include "chrome/browser/sync_file_system/sync_status_code.h"
     16 #include "google_apis/drive/gdata_errorcode.h"
     17 #include "storage/common/blob/scoped_file.h"
     18 
     19 namespace google_apis {
     20 class ChangeResource;
     21 class FileResource;
     22 class ResourceEntry;
     23 }
     24 
     25 namespace sync_file_system {
     26 namespace drive_backend {
     27 
     28 class LevelDBWrapper;
     29 
     30 void PutVersionToDB(int64 version, LevelDBWrapper* db);
     31 
     32 void PutServiceMetadataToDB(const ServiceMetadata& service_metadata,
     33                             LevelDBWrapper* db);
     34 void PutFileMetadataToDB(const FileMetadata& file, LevelDBWrapper* db);
     35 void PutFileTrackerToDB(const FileTracker& tracker, LevelDBWrapper* db);
     36 
     37 void PutFileMetadataDeletionToDB(const std::string& file_id,
     38                                  LevelDBWrapper* db);
     39 void PutFileTrackerDeletionToDB(int64 tracker_id, LevelDBWrapper* db);
     40 
     41 bool HasFileAsParent(const FileDetails& details, const std::string& file_id);
     42 
     43 bool IsAppRoot(const FileTracker& tracker);
     44 
     45 std::string GetTrackerTitle(const FileTracker& tracker);
     46 
     47 SyncStatusCode GDataErrorCodeToSyncStatusCode(
     48     google_apis::GDataErrorCode error);
     49 
     50 // Returns true if |str| starts with |prefix|, and removes |prefix| from |str|.
     51 // If |out| is not NULL, the result is stored in it.
     52 bool RemovePrefix(const std::string& str, const std::string& prefix,
     53                   std::string* out);
     54 
     55 scoped_ptr<ServiceMetadata> InitializeServiceMetadata(LevelDBWrapper* db);
     56 
     57 template <typename Src, typename Dest>
     58 void AppendContents(const Src& src, Dest* dest) {
     59   dest->insert(dest->end(), src.begin(), src.end());
     60 }
     61 
     62 template <typename Container>
     63 const typename Container::mapped_type& LookUpMap(
     64     const Container& container,
     65     const typename Container::key_type& key,
     66     const typename Container::mapped_type& default_value) {
     67   typename Container::const_iterator found = container.find(key);
     68   if (found == container.end())
     69     return default_value;
     70   return found->second;
     71 }
     72 
     73 template <typename R, typename S, typename T>
     74 R ComposeFunction(const base::Callback<T()>& g,
     75                   const base::Callback<R(S)>& f) {
     76   return f.Run(g.Run());
     77 }
     78 
     79 template <typename R, typename S, typename T>
     80 base::Callback<R()> CreateComposedFunction(
     81     const base::Callback<T()>& g,
     82     const base::Callback<R(S)>& f) {
     83   return base::Bind(&ComposeFunction<R, S, T>, g, f);
     84 }
     85 
     86 }  // namespace drive_backend
     87 }  // namespace sync_file_system
     88 
     89 #endif  // CHROME_BROWSER_SYNC_FILE_SYSTEM_DRIVE_BACKEND_DRIVE_BACKEND_UTIL_H_
     90