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feat(task_worker): Enhance image upload with conversion and pre-caching

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This commit is contained in:
cogwheel
2025-12-25 20:29:38 +05:30
parent 1447ddd93c
commit f594982d6a
7 changed files with 433 additions and 286 deletions
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41
lib/features/chat/widgets/enhanced_image_attachment.dart
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@@ -26,6 +26,16 @@ final _globalImageBytesCache = <String, Uint8List>{};
final _globalSvgStates = <String, bool>{};
final _base64WhitespacePattern = RegExp(r'\s');
/// Pre-cache image bytes for instant display after upload.
/// Call this with the server file ID and image bytes after successful upload.
void preCacheImageBytes(String fileId, Uint8List bytes) {
if (fileId.isEmpty || bytes.isEmpty) return;
_globalImageBytesCache[fileId] = bytes;
_globalLoadingStates[fileId] = false;
// Detect SVG
_globalSvgStates[fileId] = _isSvgBytes(bytes);
}
Uint8List _decodeImageData(String data) {
var payload = data;
if (payload.startsWith('data:')) {
@@ -147,6 +157,21 @@ class _EnhancedImageAttachmentState
Future<void> _loadImage() async {
final l10n = AppLocalizations.of(context)!;
// Check bytes cache first (populated during upload for instant display)
final preCachedBytes = _globalImageBytesCache[widget.attachmentId];
if (preCachedBytes != null) {
final cachedIsSvg = _globalSvgStates[widget.attachmentId] ?? false;
if (mounted) {
setState(() {
_cachedBytes = preCachedBytes;
_isSvg = cachedIsSvg;
_isLoading = false;
});
}
return;
}
final cachedError = _globalErrorStates[widget.attachmentId];
if (cachedError != null) {
if (mounted) {
@@ -241,15 +266,25 @@ class _EnhancedImageAttachmentState
final fileInfo = await api.getFileInfo(attachmentId);
final fileName = _extractFileName(fileInfo);
final ext = fileName.toLowerCase().split('.').last;
final contentType = (fileInfo['meta']?['content_type'] ??
fileInfo['content_type'] ??
'')
.toString()
.toLowerCase();
if (!['jpg', 'jpeg', 'png', 'gif', 'webp', 'svg'].contains(ext)) {
// Check both extension and content_type for image detection
final isImageByExt =
['jpg', 'jpeg', 'png', 'gif', 'webp', 'svg', 'bmp'].contains(ext);
final isImageByContentType = contentType.startsWith('image/');
if (!isImageByExt && !isImageByContentType) {
final error = l10n.notAnImageFile(fileName);
_cacheError(error);
return;
}
// Track if this is an SVG file based on extension
final isSvgFile = ext == 'svg';
// Track if this is an SVG file based on extension or content type
final isSvgFile = ext == 'svg' || contentType.contains('svg');
final fileContent = await api.getFileContent(attachmentId);