435 lines
13 KiB
Dart
435 lines
13 KiB
Dart
import 'dart:io';
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import 'dart:convert';
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import 'dart:ui' as ui;
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import 'package:flutter/material.dart';
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import 'package:flutter/foundation.dart' as foundation;
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import 'package:flutter_riverpod/flutter_riverpod.dart';
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import 'package:file_picker/file_picker.dart';
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import 'package:image_picker/image_picker.dart';
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import 'package:path/path.dart' as path;
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import '../../../core/services/api_service.dart';
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import '../../../core/providers/app_providers.dart';
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class FileAttachmentService {
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final ApiService _apiService;
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final ImagePicker _imagePicker = ImagePicker();
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FileAttachmentService(this._apiService);
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// Pick files from device
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Future<List<File>> pickFiles({
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bool allowMultiple = true,
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List<String>? allowedExtensions,
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}) async {
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try {
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final result = await FilePicker.platform.pickFiles(
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allowMultiple: allowMultiple,
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type: allowedExtensions != null ? FileType.custom : FileType.any,
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allowedExtensions: allowedExtensions,
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);
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if (result == null || result.files.isEmpty) {
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return [];
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}
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return result.files
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.where((file) => file.path != null)
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.map((file) => File(file.path!))
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.toList();
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} catch (e) {
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throw Exception('Failed to pick files: $e');
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}
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}
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// Pick image from gallery
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Future<File?> pickImage() async {
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try {
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final XFile? image = await _imagePicker.pickImage(
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source: ImageSource.gallery,
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imageQuality: 85,
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);
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if (image == null) return null;
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return File(image.path);
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} catch (e) {
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throw Exception('Failed to pick image: $e');
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}
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}
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// Take photo from camera
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Future<File?> takePhoto() async {
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try {
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final XFile? photo = await _imagePicker.pickImage(
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source: ImageSource.camera,
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imageQuality: 85,
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);
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if (photo == null) return null;
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return File(photo.path);
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} catch (e) {
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throw Exception('Failed to take photo: $e');
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}
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}
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// Compress image similar to OpenWebUI's implementation
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Future<String> compressImage(
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String imageDataUrl,
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int? maxWidth,
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int? maxHeight,
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) async {
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try {
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// Decode base64 data
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final data = imageDataUrl.split(',')[1];
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final bytes = base64Decode(data);
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// Decode image
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final codec = await ui.instantiateImageCodec(bytes);
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final frame = await codec.getNextFrame();
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final image = frame.image;
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int width = image.width;
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int height = image.height;
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// Calculate new dimensions maintaining aspect ratio
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if (maxWidth != null && maxHeight != null) {
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if (width <= maxWidth && height <= maxHeight) {
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return imageDataUrl; // No compression needed
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}
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if (width / height > maxWidth / maxHeight) {
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height = ((maxWidth * height) / width).round();
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width = maxWidth;
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} else {
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width = ((maxHeight * width) / height).round();
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height = maxHeight;
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}
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} else if (maxWidth != null) {
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if (width <= maxWidth) {
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return imageDataUrl; // No compression needed
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}
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height = ((maxWidth * height) / width).round();
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width = maxWidth;
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} else if (maxHeight != null) {
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if (height <= maxHeight) {
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return imageDataUrl; // No compression needed
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}
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width = ((maxHeight * width) / height).round();
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height = maxHeight;
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}
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// Create compressed image
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final recorder = ui.PictureRecorder();
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final canvas = Canvas(recorder);
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canvas.drawImageRect(
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image,
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Rect.fromLTWH(0, 0, image.width.toDouble(), image.height.toDouble()),
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Rect.fromLTWH(0, 0, width.toDouble(), height.toDouble()),
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Paint(),
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);
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final picture = recorder.endRecording();
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final compressedImage = await picture.toImage(width, height);
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final byteData = await compressedImage.toByteData(
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format: ui.ImageByteFormat.png,
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);
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final compressedBytes = byteData!.buffer.asUint8List();
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// Convert back to data URL
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final compressedBase64 = base64Encode(compressedBytes);
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return 'data:image/png;base64,$compressedBase64';
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} catch (e) {
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foundation.debugPrint('DEBUG: Image compression failed: $e');
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return imageDataUrl; // Return original if compression fails
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}
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}
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// Convert image file to base64 data URL with compression
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Future<String?> convertImageToDataUrl(
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File imageFile, {
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bool enableCompression = false,
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int? maxWidth,
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int? maxHeight,
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}) async {
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try {
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foundation.debugPrint('DEBUG: Converting image to data URL: ${imageFile.path}');
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// Read the file as bytes
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final bytes = await imageFile.readAsBytes();
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// Determine MIME type based on file extension
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final ext = path.extension(imageFile.path).toLowerCase();
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String mimeType = 'image/png'; // default
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if (ext == '.jpg' || ext == '.jpeg') {
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mimeType = 'image/jpeg';
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} else if (ext == '.gif') {
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mimeType = 'image/gif';
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} else if (ext == '.webp') {
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mimeType = 'image/webp';
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}
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// Convert to base64
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final base64String = base64Encode(bytes);
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String dataUrl = 'data:$mimeType;base64,$base64String';
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// Apply compression if enabled
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if (enableCompression && (maxWidth != null || maxHeight != null)) {
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dataUrl = await compressImage(dataUrl, maxWidth, maxHeight);
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}
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foundation.debugPrint(
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'DEBUG: Image converted to data URL with MIME type: $mimeType',
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);
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return dataUrl;
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} catch (e) {
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foundation.debugPrint('DEBUG: Failed to convert image to data URL: $e');
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return null;
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}
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}
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// Upload file with progress tracking
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Stream<FileUploadState> uploadFile(File file) async* {
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foundation.debugPrint('DEBUG: Starting file upload for: ${file.path}');
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try {
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final fileName = path.basename(file.path);
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final fileSize = await file.length();
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foundation.debugPrint(
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'DEBUG: File details - Name: $fileName, Size: $fileSize bytes',
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);
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yield FileUploadState(
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file: file,
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fileName: fileName,
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fileSize: fileSize,
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progress: 0.0,
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status: FileUploadStatus.uploading,
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);
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// Check if this is an image file
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final ext = path.extension(fileName).toLowerCase();
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final isImage = [
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'jpg',
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'jpeg',
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'png',
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'gif',
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'webp',
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].contains(ext.substring(1));
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if (isImage) {
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foundation.debugPrint(
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'DEBUG: Image file detected, converting to data URL instead of uploading',
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);
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// For images, convert to data URL instead of uploading
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final dataUrl = await convertImageToDataUrl(file);
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if (dataUrl != null) {
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yield FileUploadState(
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file: file,
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fileName: fileName,
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fileSize: fileSize,
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progress: 1.0,
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status: FileUploadStatus.completed,
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fileId: dataUrl, // Use data URL as fileId for images
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isImage: true,
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);
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} else {
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throw Exception('Failed to convert image to data URL');
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}
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} else {
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foundation.debugPrint('DEBUG: Non-image file, uploading to server...');
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// Upload file using the API service
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final fileId = await _apiService.uploadFile(file.path, fileName);
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foundation.debugPrint('DEBUG: File uploaded successfully with ID: $fileId');
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yield FileUploadState(
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file: file,
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fileName: fileName,
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fileSize: fileSize,
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progress: 1.0,
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status: FileUploadStatus.completed,
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fileId: fileId,
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);
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}
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} catch (e) {
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foundation.debugPrint('DEBUG: File upload failed: $e');
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final fileName = path.basename(file.path);
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final fileSize = await file.length();
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yield FileUploadState(
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file: file,
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fileName: fileName,
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fileSize: fileSize,
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progress: 0.0,
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status: FileUploadStatus.failed,
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error: e.toString(),
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);
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}
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}
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// Upload multiple files
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Stream<List<FileUploadState>> uploadMultipleFiles(List<File> files) async* {
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final states = <String, FileUploadState>{};
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for (final file in files) {
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final uploadStream = uploadFile(file);
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await for (final state in uploadStream) {
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states[file.path] = state;
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yield states.values.toList();
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}
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}
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}
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// Format file size for display
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String formatFileSize(int bytes) {
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if (bytes < 1024) return '$bytes B';
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if (bytes < 1024 * 1024) return '${(bytes / 1024).toStringAsFixed(1)} KB';
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if (bytes < 1024 * 1024 * 1024) {
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return '${(bytes / (1024 * 1024)).toStringAsFixed(1)} MB';
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}
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return '${(bytes / (1024 * 1024 * 1024)).toStringAsFixed(1)} GB';
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}
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// Get file icon based on extension
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String getFileIcon(String fileName) {
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final ext = path.extension(fileName).toLowerCase();
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// Documents
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if (['.pdf', '.doc', '.docx'].contains(ext)) return '📄';
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if (['.xls', '.xlsx'].contains(ext)) return '📊';
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if (['.ppt', '.pptx'].contains(ext)) return '📊';
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// Images
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if (['.jpg', '.jpeg', '.png', '.gif', '.webp'].contains(ext)) return '🖼️';
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// Code
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if (['.js', '.ts', '.py', '.dart', '.java', '.cpp'].contains(ext)) {
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return '💻';
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}
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if (['.html', '.css', '.json', '.xml'].contains(ext)) return '🌐';
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// Archives
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if (['.zip', '.rar', '.7z', '.tar', '.gz'].contains(ext)) return '📦';
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// Media
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if (['.mp3', '.wav', '.flac', '.m4a'].contains(ext)) return '🎵';
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if (['.mp4', '.avi', '.mov', '.mkv'].contains(ext)) return '🎬';
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return '📎';
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}
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}
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// File upload state
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class FileUploadState {
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final File file;
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final String fileName;
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final int fileSize;
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final double progress;
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final FileUploadStatus status;
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final String? fileId;
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final String? error;
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final bool? isImage; // Added for image files
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FileUploadState({
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required this.file,
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required this.fileName,
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required this.fileSize,
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required this.progress,
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required this.status,
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this.fileId,
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this.error,
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this.isImage, // Added for image files
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});
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String get formattedSize {
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if (fileSize < 1024) return '$fileSize B';
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if (fileSize < 1024 * 1024) {
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return '${(fileSize / 1024).toStringAsFixed(1)} KB';
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}
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if (fileSize < 1024 * 1024 * 1024) {
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return '${(fileSize / (1024 * 1024)).toStringAsFixed(1)} MB';
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}
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return '${(fileSize / (1024 * 1024 * 1024)).toStringAsFixed(1)} GB';
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}
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String get fileIcon {
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final ext = path.extension(fileName).toLowerCase();
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// Documents
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if (['.pdf', '.doc', '.docx'].contains(ext)) return '📄';
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if (['.xls', '.xlsx'].contains(ext)) return '📊';
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if (['.ppt', '.pptx'].contains(ext)) return '📊';
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// Images
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if (['.jpg', '.jpeg', '.png', '.gif', '.webp'].contains(ext)) return '🖼️';
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// Code
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if (['.js', '.ts', '.py', '.dart', '.java', '.cpp'].contains(ext)) {
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return '💻';
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}
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if (['.html', '.css', '.json', '.xml'].contains(ext)) return '🌐';
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// Archives
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if (['.zip', '.rar', '.7z', '.tar', '.gz'].contains(ext)) return '📦';
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// Media
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if (['.mp3', '.wav', '.flac', '.m4a'].contains(ext)) return '🎵';
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if (['.mp4', '.avi', '.mov', '.mkv'].contains(ext)) return '🎬';
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return '📎';
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}
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}
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enum FileUploadStatus { pending, uploading, completed, failed }
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// Providers
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final fileAttachmentServiceProvider = Provider<FileAttachmentService?>((ref) {
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final apiService = ref.watch(apiServiceProvider);
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if (apiService == null) return null;
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return FileAttachmentService(apiService);
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});
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// State notifier for managing attached files
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class AttachedFilesNotifier extends StateNotifier<List<FileUploadState>> {
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AttachedFilesNotifier() : super([]);
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void addFiles(List<File> files) {
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final newStates = files
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.map(
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(file) => FileUploadState(
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file: file,
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fileName: path.basename(file.path),
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fileSize: file.lengthSync(),
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progress: 0.0,
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status: FileUploadStatus.pending,
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),
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)
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.toList();
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state = [...state, ...newStates];
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}
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void updateFileState(String filePath, FileUploadState newState) {
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state = [
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for (final fileState in state)
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if (fileState.file.path == filePath) newState else fileState,
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];
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}
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void removeFile(String filePath) {
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state = state
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.where((fileState) => fileState.file.path != filePath)
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.toList();
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}
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void clearAll() {
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state = [];
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}
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}
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final attachedFilesProvider =
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StateNotifierProvider<AttachedFilesNotifier, List<FileUploadState>>((ref) {
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return AttachedFilesNotifier();
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});
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