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feat: Added the logic to save the user drawn badge to local storage. (#…
…980)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,131 @@ | ||
| import 'dart:io'; | ||
| import 'dart:convert'; | ||
| import 'dart:typed_data'; | ||
| import 'package:badgemagic/bademagic_module/utils/byte_array_utils.dart'; | ||
| import 'package:badgemagic/bademagic_module/utils/image_utils.dart'; | ||
| import 'package:badgemagic/providers/imageprovider.dart'; | ||
| import 'package:flutter/services.dart'; | ||
| import 'package:get_it/get_it.dart'; | ||
| import 'package:path_provider/path_provider.dart'; | ||
| import 'package:uuid/uuid.dart'; | ||
|
|
||
| class FileHelper { | ||
| final InlineImageProvider imageCacheProvider = | ||
| GetIt.instance<InlineImageProvider>(); | ||
| ImageUtils imageUtils = ImageUtils(); | ||
| static const Uuid uuid = Uuid(); | ||
|
|
||
| static Future<String> _getFilePath(String filename) async { | ||
| final directory = await getApplicationDocumentsDirectory(); | ||
| return '${directory.path}/$filename'; | ||
| } | ||
|
|
||
| static Future<File> _writeToFile(String filename, String data) async { | ||
| final path = await _getFilePath(filename); | ||
|
|
||
| logger.d('Writing to file: $path'); | ||
|
|
||
| return File(path).writeAsString(data); | ||
| } | ||
|
|
||
| // static Future<String> _readFromFile(String filename) async { | ||
| // try { | ||
| // final path = await _getFilePath(filename); | ||
| // return await File(path).readAsString(); | ||
| // } catch (e) { | ||
| // return ''; // Return an empty string if there's an error | ||
| // } | ||
| // } | ||
|
|
||
| static String _generateUniqueFilename() { | ||
| final String uniqueId = uuid.v4(); | ||
| final String timestamp = DateTime.now().millisecondsSinceEpoch.toString(); | ||
| return 'data_${timestamp}_$uniqueId.json'; | ||
| } | ||
|
|
||
| // Add a new image to the cache | ||
| void addToCache(Uint8List imageData) { | ||
| int key; | ||
| if (imageCacheProvider.availableKeys.isNotEmpty) { | ||
| // Reuse the lowest available key | ||
| key = imageCacheProvider.availableKeys.first; | ||
| imageCacheProvider.availableKeys.remove(key); | ||
| } else { | ||
| // Assign a new key | ||
| key = imageCacheProvider.imageCache.length; | ||
| while (imageCacheProvider.imageCache.containsKey(key)) { | ||
| key++; | ||
| } | ||
| } | ||
| imageCacheProvider.imageCache[key] = imageData; | ||
| } | ||
|
|
||
| // Remove an image from the cache | ||
| void removeFromCache(int key) { | ||
| if (imageCacheProvider.imageCache.containsKey(key)) { | ||
| imageCacheProvider.imageCache.remove(key); | ||
| imageCacheProvider.availableKeys | ||
| .add(key); // Add key to the pool of available keys | ||
| } | ||
| } | ||
|
|
||
| // Generate a Uint8List from a 2D list (image data) and add it to the cache | ||
| Future<void> _addImageDataToCache(List<List<dynamic>> imageData) async { | ||
| // Convert List<List<dynamic>> to List<List<int>> | ||
| List<List<int>> intImageData = | ||
| imageData.map((list) => list.cast<int>()).toList(); | ||
| Uint8List imageBytes = | ||
| await imageUtils.convert2DListToUint8List(intImageData); | ||
| addToCache(imageBytes); | ||
| } | ||
|
|
||
| // Read all files, parse the 2D lists, and add to cache | ||
| Future<void> loadImageCacheFromFiles() async { | ||
| final directory = await getApplicationDocumentsDirectory(); | ||
| final List<FileSystemEntity> files = directory.listSync(); | ||
|
|
||
| for (var file in files) { | ||
| if (file is File && file.path.endsWith('.json')) { | ||
| final String content = await file.readAsString(); | ||
| if (content.isNotEmpty) { | ||
| // Ensure correct type casting | ||
| final List<dynamic> decodedData = jsonDecode(content); | ||
| final List<List<dynamic>> imageData = | ||
| decodedData.cast<List<dynamic>>(); | ||
| await _addImageDataToCache(imageData); | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
||
| // Save a 2D list to a file with a unique name | ||
| Future<void> saveImage(List<List<bool>> imageData) async { | ||
| List<List<int>> image = List.generate( | ||
| imageData.length, (i) => List<int>.filled(imageData[i].length, 0)); | ||
|
|
||
| //convert the 2D list of bool into 2D list of int | ||
| for (int i = 0; i < imageData.length; i++) { | ||
| for (int j = 0; j < imageData[i].length; j++) { | ||
| image[i][j] = imageData[i][j] ? 1 : 0; | ||
| } | ||
| } | ||
|
|
||
| // Generate a unique filename | ||
| String filename = _generateUniqueFilename(); | ||
|
|
||
| logger.d('Saving image to file: $filename'); | ||
|
|
||
| // Convert the 2D list to JSON string | ||
| String jsonData = jsonEncode(image); | ||
|
|
||
| logger.d('JSON data: $jsonData'); | ||
|
|
||
| // Write the JSON string to a file | ||
| await _writeToFile(filename, jsonData); | ||
|
|
||
| logger.d('Image saved to file: $filename'); | ||
|
|
||
| //Add the image to the image cache after saving it to a file | ||
| await _addImageDataToCache(image); | ||
| } | ||
| } |
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