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 "webkit/browser/fileapi/async_file_util.h" 14 #include "webkit/common/blob/shareable_file_reference.h" 15 16 namespace fileapi { 17 class FileSystemOperationContext; 18 class FileSystemURL; 19 } 20 21 namespace webkit_blob { 22 class FileStreamReader; 23 } 24 25 enum MediaFileValidationType { 26 NO_MEDIA_FILE_VALIDATION, 27 APPLY_MEDIA_FILE_VALIDATION, 28 }; 29 30 class DeviceMediaAsyncFileUtil : public fileapi::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 fileapi::FileSystemURL& url); 40 41 // AsyncFileUtil overrides. 42 virtual void CreateOrOpen( 43 scoped_ptr<fileapi::FileSystemOperationContext> context, 44 const fileapi::FileSystemURL& url, 45 int file_flags, 46 const CreateOrOpenCallback& callback) OVERRIDE; 47 virtual void EnsureFileExists( 48 scoped_ptr<fileapi::FileSystemOperationContext> context, 49 const fileapi::FileSystemURL& url, 50 const EnsureFileExistsCallback& callback) OVERRIDE; 51 virtual void CreateDirectory( 52 scoped_ptr<fileapi::FileSystemOperationContext> context, 53 const fileapi::FileSystemURL& url, 54 bool exclusive, 55 bool recursive, 56 const StatusCallback& callback) OVERRIDE; 57 virtual void GetFileInfo( 58 scoped_ptr<fileapi::FileSystemOperationContext> context, 59 const fileapi::FileSystemURL& url, 60 const GetFileInfoCallback& callback) OVERRIDE; 61 virtual void ReadDirectory( 62 scoped_ptr<fileapi::FileSystemOperationContext> context, 63 const fileapi::FileSystemURL& url, 64 const ReadDirectoryCallback& callback) OVERRIDE; 65 virtual void Touch( 66 scoped_ptr<fileapi::FileSystemOperationContext> context, 67 const fileapi::FileSystemURL& url, 68 const base::Time& last_access_time, 69 const base::Time& last_modified_time, 70 const StatusCallback& callback) OVERRIDE; 71 virtual void Truncate( 72 scoped_ptr<fileapi::FileSystemOperationContext> context, 73 const fileapi::FileSystemURL& url, 74 int64 length, 75 const StatusCallback& callback) OVERRIDE; 76 virtual void CopyFileLocal( 77 scoped_ptr<fileapi::FileSystemOperationContext> context, 78 const fileapi::FileSystemURL& src_url, 79 const fileapi::FileSystemURL& dest_url, 80 CopyOrMoveOption option, 81 const CopyFileProgressCallback& progress_callback, 82 const StatusCallback& callback) OVERRIDE; 83 virtual void MoveFileLocal( 84 scoped_ptr<fileapi::FileSystemOperationContext> context, 85 const fileapi::FileSystemURL& src_url, 86 const fileapi::FileSystemURL& dest_url, 87 CopyOrMoveOption option, 88 const StatusCallback& callback) OVERRIDE; 89 virtual void CopyInForeignFile( 90 scoped_ptr<fileapi::FileSystemOperationContext> context, 91 const base::FilePath& src_file_path, 92 const fileapi::FileSystemURL& dest_url, 93 const StatusCallback& callback) OVERRIDE; 94 virtual void DeleteFile( 95 scoped_ptr<fileapi::FileSystemOperationContext> context, 96 const fileapi::FileSystemURL& url, 97 const StatusCallback& callback) OVERRIDE; 98 virtual void DeleteDirectory( 99 scoped_ptr<fileapi::FileSystemOperationContext> context, 100 const fileapi::FileSystemURL& url, 101 const StatusCallback& callback) OVERRIDE; 102 virtual void DeleteRecursively( 103 scoped_ptr<fileapi::FileSystemOperationContext> context, 104 const fileapi::FileSystemURL& url, 105 const StatusCallback& callback) OVERRIDE; 106 virtual void CreateSnapshotFile( 107 scoped_ptr<fileapi::FileSystemOperationContext> context, 108 const fileapi::FileSystemURL& url, 109 const CreateSnapshotFileCallback& callback) OVERRIDE; 110 111 // This method is called when existing Blobs are read. 112 // |expected_modification_time| indicates the expected snapshot state of the 113 // underlying storage. The returned FileStreamReader must return an error 114 // when the state of the underlying storage changes. Any errors associated 115 // with reading this file are returned by the FileStreamReader itself. 116 virtual scoped_ptr<webkit_blob::FileStreamReader> GetFileStreamReader( 117 const fileapi::FileSystemURL& url, 118 int64 offset, 119 const base::Time& expected_modification_time, 120 fileapi::FileSystemContext* context); 121 122 private: 123 class MediaPathFilterWrapper; 124 125 // Use Create() to get an instance of DeviceMediaAsyncFileUtil. 126 DeviceMediaAsyncFileUtil(const base::FilePath& profile_path, 127 MediaFileValidationType validation_type); 128 129 // Called when GetFileInfo method call succeeds. |file_info| contains the 130 // file details of the requested url. |callback| is invoked to complete the 131 // GetFileInfo request. 132 void OnDidGetFileInfo( 133 scoped_ptr<fileapi::FileSystemOperationContext> context, 134 const base::FilePath& path, 135 const GetFileInfoCallback& callback, 136 const base::File::Info& file_info); 137 138 // Called when ReadDirectory method call succeeds. |callback| is invoked to 139 // complete the ReadDirectory request. 140 // 141 // If the contents of the given directory are reported in one batch, then 142 // |file_list| will have the list of all files/directories in the given 143 // directory and |has_more| will be false. 144 // 145 // If the contents of the given directory are reported in multiple chunks, 146 // |file_list| will have only a subset of all contents (the subsets reported 147 // in any two calls are disjoint), and |has_more| will be true, except for 148 // the last chunk. 149 void OnDidReadDirectory( 150 scoped_ptr<fileapi::FileSystemOperationContext> context, 151 const ReadDirectoryCallback& callback, 152 const EntryList& file_list, 153 bool has_more); 154 155 bool validate_media_files() const; 156 157 // Profile path. 158 const base::FilePath profile_path_; 159 160 scoped_refptr<MediaPathFilterWrapper> media_path_filter_wrapper_; 161 162 // For callbacks that may run after destruction. 163 base::WeakPtrFactory<DeviceMediaAsyncFileUtil> weak_ptr_factory_; 164 165 DISALLOW_COPY_AND_ASSIGN(DeviceMediaAsyncFileUtil); 166 }; 167 168 #endif // CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_DEVICE_MEDIA_ASYNC_FILE_UTIL_H_ 169
