1 // Copyright (c) 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_MEDIA_GALLERIES_FILEAPI_DEVICE_MEDIA_ASYNC_FILE_UTIL_H_ 6 #define CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_DEVICE_MEDIA_ASYNC_FILE_UTIL_H_ 7 8 #include "base/files/file.h" 9 #include "base/files/file_path.h" 10 #include "base/memory/ref_counted.h" 11 #include "base/memory/scoped_ptr.h" 12 #include "base/memory/weak_ptr.h" 13 #include "storage/browser/fileapi/async_file_util.h" 14 #include "storage/common/blob/shareable_file_reference.h" 15 16 namespace storage { 17 class FileSystemOperationContext; 18 class FileSystemURL; 19 } 20 21 namespace storage { 22 class FileStreamReader; 23 } 24 25 enum MediaFileValidationType { 26 NO_MEDIA_FILE_VALIDATION, 27 APPLY_MEDIA_FILE_VALIDATION, 28 }; 29 30 class DeviceMediaAsyncFileUtil : public storage::AsyncFileUtil { 31 public: 32 virtual ~DeviceMediaAsyncFileUtil(); 33 34 // Returns an instance of DeviceMediaAsyncFileUtil. 35 static scoped_ptr<DeviceMediaAsyncFileUtil> Create( 36 const base::FilePath& profile_path, 37 MediaFileValidationType validation_type); 38 39 bool SupportsStreaming(const storage::FileSystemURL& url); 40 41 // AsyncFileUtil overrides. 42 virtual void CreateOrOpen( 43 scoped_ptr<storage::FileSystemOperationContext> context, 44 const storage::FileSystemURL& url, 45 int file_flags, 46 const CreateOrOpenCallback& callback) OVERRIDE; 47 virtual void EnsureFileExists( 48 scoped_ptr<storage::FileSystemOperationContext> context, 49 const storage::FileSystemURL& url, 50 const EnsureFileExistsCallback& callback) OVERRIDE; 51 virtual void CreateDirectory( 52 scoped_ptr<storage::FileSystemOperationContext> context, 53 const storage::FileSystemURL& url, 54 bool exclusive, 55 bool recursive, 56 const StatusCallback& callback) OVERRIDE; 57 virtual void GetFileInfo( 58 scoped_ptr<storage::FileSystemOperationContext> context, 59 const storage::FileSystemURL& url, 60 const GetFileInfoCallback& callback) OVERRIDE; 61 virtual void ReadDirectory( 62 scoped_ptr<storage::FileSystemOperationContext> context, 63 const storage::FileSystemURL& url, 64 const ReadDirectoryCallback& callback) OVERRIDE; 65 virtual void Touch(scoped_ptr<storage::FileSystemOperationContext> context, 66 const storage::FileSystemURL& url, 67 const base::Time& last_access_time, 68 const base::Time& last_modified_time, 69 const StatusCallback& callback) OVERRIDE; 70 virtual void Truncate(scoped_ptr<storage::FileSystemOperationContext> context, 71 const storage::FileSystemURL& url, 72 int64 length, 73 const StatusCallback& callback) OVERRIDE; 74 virtual void CopyFileLocal( 75 scoped_ptr<storage::FileSystemOperationContext> context, 76 const storage::FileSystemURL& src_url, 77 const storage::FileSystemURL& dest_url, 78 CopyOrMoveOption option, 79 const CopyFileProgressCallback& progress_callback, 80 const StatusCallback& callback) OVERRIDE; 81 virtual void MoveFileLocal( 82 scoped_ptr<storage::FileSystemOperationContext> context, 83 const storage::FileSystemURL& src_url, 84 const storage::FileSystemURL& dest_url, 85 CopyOrMoveOption option, 86 const StatusCallback& callback) OVERRIDE; 87 virtual void CopyInForeignFile( 88 scoped_ptr<storage::FileSystemOperationContext> context, 89 const base::FilePath& src_file_path, 90 const storage::FileSystemURL& dest_url, 91 const StatusCallback& callback) OVERRIDE; 92 virtual void DeleteFile( 93 scoped_ptr<storage::FileSystemOperationContext> context, 94 const storage::FileSystemURL& url, 95 const StatusCallback& callback) OVERRIDE; 96 virtual void DeleteDirectory( 97 scoped_ptr<storage::FileSystemOperationContext> context, 98 const storage::FileSystemURL& url, 99 const StatusCallback& callback) OVERRIDE; 100 virtual void DeleteRecursively( 101 scoped_ptr<storage::FileSystemOperationContext> context, 102 const storage::FileSystemURL& url, 103 const StatusCallback& callback) OVERRIDE; 104 virtual void CreateSnapshotFile( 105 scoped_ptr<storage::FileSystemOperationContext> context, 106 const storage::FileSystemURL& url, 107 const CreateSnapshotFileCallback& callback) OVERRIDE; 108 109 // This method is called when existing Blobs are read. 110 // |expected_modification_time| indicates the expected snapshot state of the 111 // underlying storage. The returned FileStreamReader must return an error 112 // when the state of the underlying storage changes. Any errors associated 113 // with reading this file are returned by the FileStreamReader itself. 114 virtual scoped_ptr<storage::FileStreamReader> GetFileStreamReader( 115 const storage::FileSystemURL& url, 116 int64 offset, 117 const base::Time& expected_modification_time, 118 storage::FileSystemContext* context); 119 120 private: 121 class MediaPathFilterWrapper; 122 123 // Use Create() to get an instance of DeviceMediaAsyncFileUtil. 124 DeviceMediaAsyncFileUtil(const base::FilePath& profile_path, 125 MediaFileValidationType validation_type); 126 127 // Called when GetFileInfo method call succeeds. |file_info| contains the 128 // file details of the requested url. |callback| is invoked to complete the 129 // GetFileInfo request. 130 void OnDidGetFileInfo( 131 base::SequencedTaskRunner* task_runner, 132 const base::FilePath& path, 133 const GetFileInfoCallback& callback, 134 const base::File::Info& file_info); 135 136 // Called when ReadDirectory method call succeeds. |callback| is invoked to 137 // complete the ReadDirectory request. 138 // 139 // If the contents of the given directory are reported in one batch, then 140 // |file_list| will have the list of all files/directories in the given 141 // directory and |has_more| will be false. 142 // 143 // If the contents of the given directory are reported in multiple chunks, 144 // |file_list| will have only a subset of all contents (the subsets reported 145 // in any two calls are disjoint), and |has_more| will be true, except for 146 // the last chunk. 147 void OnDidReadDirectory( 148 base::SequencedTaskRunner* task_runner, 149 const ReadDirectoryCallback& callback, 150 const EntryList& file_list, 151 bool has_more); 152 153 bool validate_media_files() const; 154 155 // Profile path. 156 const base::FilePath profile_path_; 157 158 scoped_refptr<MediaPathFilterWrapper> media_path_filter_wrapper_; 159 160 // For callbacks that may run after destruction. 161 base::WeakPtrFactory<DeviceMediaAsyncFileUtil> weak_ptr_factory_; 162 163 DISALLOW_COPY_AND_ASSIGN(DeviceMediaAsyncFileUtil); 164 }; 165 166 #endif // CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_DEVICE_MEDIA_ASYNC_FILE_UTIL_H_ 167
