| Eric Sum | 183a8de | 2023-12-15 19:46:09 | [diff] [blame] | 1 | // Copyright 2023 The Chromium Authors |
| 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 ASH_AMBIENT_AMBIENT_BACKUP_PHOTO_DOWNLOADER_H_ |
| 6 | #define ASH_AMBIENT_AMBIENT_BACKUP_PHOTO_DOWNLOADER_H_ |
| 7 | |
| 8 | #include <string> |
| 9 | #include <vector> |
| 10 | |
| 11 | #include "ash/ash_export.h" |
| 12 | #include "base/files/file_path.h" |
| 13 | #include "base/functional/callback.h" |
| 14 | #include "base/memory/scoped_refptr.h" |
| 15 | #include "base/memory/weak_ptr.h" |
| 16 | #include "ui/gfx/geometry/size.h" |
| 17 | |
| 18 | namespace base { |
| 19 | class SequencedTaskRunner; |
| 20 | } // namespace base |
| 21 | |
| 22 | namespace gfx { |
| 23 | class ImageSkia; |
| 24 | } // namespace gfx |
| 25 | |
| 26 | namespace ash { |
| 27 | |
| 28 | class AmbientAccessTokenController; |
| 29 | |
| 30 | // Downloads a "backup" image from a fixed url, resizes it to roughly match a |
| 31 | // target size provided by the caller, and saves it to disc. After it's |
| 32 | // downloaded, the backup image may be used in future ambient sessions if there |
| 33 | // are issues fetching the primary stream of photos from the backend. |
| 34 | // |
| 35 | // `AmbientBackupPhotoDownloader` only downloads/saves one photo in its lifetime |
| 36 | // and runs the `completion_cb` when done. It may be destroyed at any point to |
| 37 | // stop whatever task it's running internally, and the `completion_cb` will not |
| 38 | // be run. |
| 39 | class ASH_EXPORT AmbientBackupPhotoDownloader { |
| 40 | public: |
| 41 | AmbientBackupPhotoDownloader( |
| 42 | AmbientAccessTokenController& access_token_controller, |
| 43 | int cache_idx, |
| 44 | gfx::Size target_size, |
| 45 | const std::string& url, |
| 46 | base::OnceCallback<void(bool success)> completion_cb); |
| 47 | AmbientBackupPhotoDownloader(const AmbientBackupPhotoDownloader&) = delete; |
| 48 | AmbientBackupPhotoDownloader& operator=(const AmbientBackupPhotoDownloader&) = |
| 49 | delete; |
| 50 | ~AmbientBackupPhotoDownloader(); |
| 51 | |
| 52 | private: |
| 53 | void RunCompletionCallback(bool success); |
| 54 | void DecodeImage(base::FilePath temp_image_path); |
| 55 | void ScheduleResizeAndEncode(const gfx::ImageSkia& decoded_image); |
| 56 | void SaveImage(const std::vector<unsigned char>& encoded_image); |
| 57 | |
| 58 | const int cache_idx_; |
| 59 | const gfx::Size target_size_; |
| 60 | const scoped_refptr<base::SequencedTaskRunner> file_task_runner_; |
| 61 | base::OnceCallback<void(bool success)> completion_cb_; |
| 62 | // Temporary location where the image is downloaded first before it is |
| 63 | // resized and then saved to the final destination. |
| 64 | base::FilePath temp_image_path_; |
| 65 | base::WeakPtrFactory<AmbientBackupPhotoDownloader> weak_factory_{this}; |
| 66 | }; |
| 67 | |
| 68 | } // namespace ash |
| 69 | |
| 70 | #endif // ASH_AMBIENT_AMBIENT_BACKUP_PHOTO_DOWNLOADER_H_ |