metadata_web 0.0.4 
metadata_web: ^0.0.4 copied to clipboard
A powerful web-specific metadata extraction implementation for Flutter, seamlessly integrating with web browsers to extract EXIF and media data.
import 'package:flutter/material.dart';
import 'package:metadata_web/metadata_web.dart';
import 'package:metadata_core/metadata_core.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Metadata Web Demo',
debugShowCheckedModeBanner: false,
theme: ThemeData(
brightness: Brightness.dark,
primarySwatch: Colors.deepPurple,
scaffoldBackgroundColor: const Color(0xFF0F0E17),
cardColor: const Color(0xFF1E1B29),
fontFamily: 'Inter',
useMaterial3: true,
),
home: const HomeScreen(),
);
}
}
class HomeScreen extends StatefulWidget {
const HomeScreen({super.key});
@override
State<HomeScreen> createState() => _HomeScreenState();
}
class _HomeScreenState extends State<HomeScreen> {
final List<MediaFile> _files = [];
final Map<String, MetadataResult> _metadataMap = {};
bool _isScanning = false;
String _status = 'Ready to scan files';
double _progress = 0.0;
MediaFile? _selectedFile;
Future<void> _handleFolderPick() async {
try {
setState(() {
_isScanning = true;
_status = 'Picking folder...';
_progress = 0.0;
_files.clear();
_metadataMap.clear();
_selectedFile = null;
});
final pickedFiles = await WebFolderPicker.pickFolder();
if (pickedFiles.isEmpty) {
setState(() {
_isScanning = false;
_status = 'No folder selected';
});
return;
}
await _scanFileList(pickedFiles);
} catch (e) {
setState(() {
_isScanning = false;
_status = 'Error: $e';
});
}
}
Future<void> _scanFileList(List<dynamic> fileList) async {
final scanner = WebFileScanner();
await for (final progress in scanner.scanFiles(fileList)) {
setState(() {
_status = progress.status;
_progress = progress.totalFiles > 0
? progress.processedFiles / progress.totalFiles
: 0.0;
if (progress.currentFile != null) {
_files.add(progress.currentFile!);
if (progress.metadata != null) {
_metadataMap[progress.currentFile!.id] = progress.metadata!;
}
}
});
}
setState(() {
_isScanning = false;
_status = 'Successfully scanned ${_files.length} files!';
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
body: Container(
decoration: const BoxDecoration(
gradient: LinearGradient(
begin: Alignment.topLeft,
end: Alignment.bottomRight,
colors: [
Color(0xFF0D0B14),
Color(0xFF161224),
Color(0xFF1E1435),
],
stops: [0.0, 0.5, 1.0],
),
),
child: SafeArea(
child: Padding(
padding: const EdgeInsets.all(24.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
_buildHeader(),
const SizedBox(height: 24),
_buildUploadZone(),
const SizedBox(height: 24),
if (_isScanning) _buildProgressBar(),
const SizedBox(height: 24),
Expanded(
child: Row(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Expanded(
flex: 3,
child: _buildFilesList(),
),
if (_selectedFile != null) ...[
const SizedBox(width: 24),
Expanded(
flex: 2,
child: _buildDetailsPanel(),
),
],
],
),
),
],
),
),
),
),
);
}
Widget _buildHeader() {
return Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Row(
children: [
Container(
padding: const EdgeInsets.all(12),
decoration: BoxDecoration(
gradient: const LinearGradient(
colors: [Colors.purpleAccent, Colors.deepPurpleAccent],
),
borderRadius: BorderRadius.circular(16),
boxShadow: [
BoxShadow(
color: Colors.purpleAccent.withValues(alpha: 0.3),
blurRadius: 12,
offset: const Offset(0, 4),
),
],
),
child: const Icon(
Icons.folder_copy_rounded,
color: Colors.white,
size: 28,
),
),
const SizedBox(width: 16),
Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
const Text(
'Klikr Metadata Web',
style: TextStyle(
fontSize: 28,
fontWeight: FontWeight.bold,
letterSpacing: -0.5,
color: Colors.white,
),
),
Text(
'Web-specific high-performance metadata extraction',
style: TextStyle(
fontSize: 14,
color: Colors.grey.shade400,
),
),
],
),
],
),
],
);
}
Widget _buildUploadZone() {
return DragTarget<Object>(
onAcceptWithDetails: (details) {
// Drag and drop scanning
},
builder: (context, candidateData, rejectedData) {
return Container(
width: double.infinity,
height: 180,
decoration: BoxDecoration(
color: const Color(0xFF1E1B29).withValues(alpha: 0.7),
borderRadius: BorderRadius.circular(24),
border: Border.all(
color: Colors.purpleAccent.withValues(alpha: 0.3),
width: 1.5,
),
boxShadow: [
BoxShadow(
color: Colors.black.withValues(alpha: 0.2),
blurRadius: 20,
offset: const Offset(0, 10),
),
],
),
child: ClipRRect(
borderRadius: BorderRadius.circular(24),
child: Stack(
children: [
Positioned.fill(
child: Container(
decoration: BoxDecoration(
gradient: RadialGradient(
colors: [
Colors.purpleAccent.withValues(alpha: 0.08),
Colors.transparent,
],
radius: 1.2,
center: Alignment.center,
),
),
),
),
Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
const Icon(
Icons.cloud_upload_outlined,
size: 48,
color: Colors.purpleAccent,
),
const SizedBox(height: 12),
const Text(
'Select a folder to extract rich metadata',
style: TextStyle(
fontSize: 16,
fontWeight: FontWeight.w600,
color: Colors.white,
),
),
const SizedBox(height: 16),
ElevatedButton.icon(
onPressed: _isScanning ? null : _handleFolderPick,
icon: const Icon(Icons.folder_open_rounded),
label: const Text('Pick Directory'),
style: ElevatedButton.styleFrom(
foregroundColor: Colors.white,
backgroundColor: Colors.deepPurpleAccent,
padding: const EdgeInsets.symmetric(
horizontal: 24,
vertical: 16,
),
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(12),
),
elevation: 8,
shadowColor: Colors.deepPurpleAccent.withValues(alpha: 0.4),
),
),
],
),
),
],
),
),
);
},
);
}
Widget _buildProgressBar() {
return Container(
padding: const EdgeInsets.all(16),
decoration: BoxDecoration(
color: const Color(0xFF1E1B29),
borderRadius: BorderRadius.circular(16),
border: Border.all(color: Colors.white10),
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Expanded(
child: Text(
_status,
maxLines: 1,
overflow: TextOverflow.ellipsis,
style: const TextStyle(fontWeight: FontWeight.w500),
),
),
Text(
'${(_progress * 100).toStringAsFixed(0)}%',
style: const TextStyle(
color: Colors.purpleAccent,
fontWeight: FontWeight.bold,
),
),
],
),
const SizedBox(height: 12),
ClipRRect(
borderRadius: BorderRadius.circular(8),
child: LinearProgressIndicator(
value: _progress,
backgroundColor: Colors.white12,
valueColor:
const AlwaysStoppedAnimation<Color>(Colors.purpleAccent),
minHeight: 8,
),
),
],
),
);
}
Widget _buildFilesList() {
if (_files.isEmpty) {
return Container(
decoration: BoxDecoration(
color: const Color(0xFF1E1B29).withValues(alpha: 0.4),
borderRadius: BorderRadius.circular(24),
border: Border.all(color: Colors.white12),
),
child: const Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Icon(Icons.photo_library_outlined,
size: 64, color: Colors.white24),
SizedBox(height: 16),
Text(
'No scanned files yet',
style: TextStyle(
fontSize: 18,
fontWeight: FontWeight.w500,
color: Colors.white38,
),
),
],
),
),
);
}
return Container(
decoration: BoxDecoration(
color: const Color(0xFF1E1B29).withValues(alpha: 0.4),
borderRadius: BorderRadius.circular(24),
border: Border.all(color: Colors.white12),
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Padding(
padding: const EdgeInsets.fromLTRB(20, 20, 20, 12),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
Text(
'Scanned Media (${_files.length})',
style: const TextStyle(
fontSize: 18,
fontWeight: FontWeight.bold,
),
),
Text(
_status,
style: TextStyle(color: Colors.grey.shade400, fontSize: 13),
),
],
),
),
const Divider(height: 1, color: Colors.white12),
Expanded(
child: ListView.builder(
padding: const EdgeInsets.all(12),
itemCount: _files.length,
itemBuilder: (context, index) {
final file = _files[index];
final isSelected = _selectedFile?.id == file.id;
final metadata = _metadataMap[file.id];
return Card(
elevation: isSelected ? 8 : 0,
color: isSelected
? Colors.purpleAccent.withValues(alpha: 0.15)
: Colors.transparent,
shape: RoundedRectangleBorder(
borderRadius: BorderRadius.circular(16),
side: BorderSide(
color: isSelected
? Colors.purpleAccent.withValues(alpha: 0.5)
: Colors.white10,
),
),
child: InkWell(
borderRadius: BorderRadius.circular(16),
onTap: () {
setState(() {
_selectedFile = file;
});
},
child: Padding(
padding: const EdgeInsets.all(12.0),
key: ValueKey(file.id),
child: Row(
children: [
Container(
width: 64,
height: 64,
decoration: BoxDecoration(
color: Colors.black26,
borderRadius: BorderRadius.circular(12),
border: Border.all(color: Colors.white12),
),
child: file.thumbnailPath != null
? ClipRRect(
borderRadius: BorderRadius.circular(11),
child: Image.network(
file.thumbnailPath!,
fit: BoxFit.cover,
errorBuilder: (c, e, s) => const Icon(
Icons.broken_image_rounded,
color: Colors.white38,
),
),
)
: Icon(
file.mimeType.startsWith('video/')
? Icons.video_collection_rounded
: Icons.image_rounded,
color: Colors.purpleAccent.withValues(alpha: 0.7),
size: 32,
),
),
const SizedBox(width: 16),
Expanded(
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
file.fileName,
style: const TextStyle(
fontWeight: FontWeight.bold,
fontSize: 15,
),
maxLines: 1,
overflow: TextOverflow.ellipsis,
),
const SizedBox(height: 4),
Text(
file.relativePath,
style: TextStyle(
color: Colors.grey.shade400,
fontSize: 12,
),
maxLines: 1,
overflow: TextOverflow.ellipsis,
),
const SizedBox(height: 4),
Text(
'${(file.size / 1024).toStringAsFixed(1)} KB • ${file.mimeType}',
style: TextStyle(
color: Colors.grey.shade500,
fontSize: 11,
),
),
],
),
),
if (metadata != null)
Container(
padding: const EdgeInsets.symmetric(
horizontal: 10,
vertical: 6,
),
decoration: BoxDecoration(
color: Colors.greenAccent.withValues(alpha: 0.1),
borderRadius: BorderRadius.circular(8),
border: Border.all(
color: Colors.greenAccent.withValues(alpha: 0.3),
),
),
child: const Row(
children: [
Icon(
Icons.check_circle_outline,
size: 14,
color: Colors.greenAccent,
),
SizedBox(width: 4),
Text(
'EXIF',
style: TextStyle(
color: Colors.greenAccent,
fontSize: 11,
fontWeight: FontWeight.bold,
),
),
],
),
),
const Icon(
Icons.chevron_right_rounded,
color: Colors.white30,
),
],
),
),
),
);
},
),
),
],
),
);
}
Widget _buildDetailsPanel() {
final file = _selectedFile!;
final metadata = _metadataMap[file.id];
return Container(
decoration: BoxDecoration(
color: const Color(0xFF1E1B29),
borderRadius: BorderRadius.circular(24),
border: Border.all(
color: Colors.purpleAccent.withValues(alpha: 0.3),
),
),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Padding(
padding: const EdgeInsets.all(20.0),
child: Row(
mainAxisAlignment: MainAxisAlignment.spaceBetween,
children: [
const Text(
'Metadata Details',
style: TextStyle(
fontSize: 18,
fontWeight: FontWeight.bold,
),
),
IconButton(
icon: const Icon(Icons.close, color: Colors.white54),
onPressed: () {
setState(() {
_selectedFile = null;
});
},
),
],
),
),
const Divider(height: 1, color: Colors.white12),
Expanded(
child: ListView(
padding: const EdgeInsets.all(20),
children: [
_buildPreviewSection(file),
const SizedBox(height: 24),
_buildInfoTile('File Name', file.fileName),
_buildInfoTile('Relative Path', file.relativePath),
_buildInfoTile('Mime Type', file.mimeType),
_buildInfoTile(
'File Size', '${(file.size / 1024).toStringAsFixed(1)} KB'),
_buildInfoTile('Scanned Time', file.createdAt.toString()),
if (metadata != null) ...[
const SizedBox(height: 20),
const Text(
'EXIF / Media Tags',
style: TextStyle(
fontSize: 16,
fontWeight: FontWeight.bold,
color: Colors.purpleAccent,
),
),
const SizedBox(height: 12),
if (metadata.imageMetadata?.width != null)
_buildInfoTile('Dimensions',
'${metadata.imageMetadata!.width} x ${metadata.imageMetadata!.height}'),
if (metadata.device?.brand != null)
_buildInfoTile('Camera Make', metadata.device!.brand!),
if (metadata.device?.model != null)
_buildInfoTile('Camera Model', metadata.device!.model!),
if (metadata.imageMetadata?.exposureTime != null)
_buildInfoTile('Exposure Time',
metadata.imageMetadata!.exposureTime!.toString()),
if (metadata.imageMetadata?.fNumber != null)
_buildInfoTile(
'F-Number', 'f/${metadata.imageMetadata!.fNumber}'),
if (metadata.imageMetadata?.iso != null)
_buildInfoTile(
'ISO Speed', metadata.imageMetadata!.iso!.toString()),
],
],
),
),
],
),
);
}
Widget _buildPreviewSection(MediaFile file) {
return Container(
height: 200,
width: double.infinity,
decoration: BoxDecoration(
color: Colors.black45,
borderRadius: BorderRadius.circular(16),
border: Border.all(color: Colors.white10),
),
child: ClipRRect(
borderRadius: BorderRadius.circular(16),
child: Image.network(
file.path,
fit: BoxFit.contain,
errorBuilder: (context, error, stackTrace) {
return Center(
child: Icon(
file.mimeType.startsWith('video/')
? Icons.video_library_outlined
: Icons.image_outlined,
size: 64,
color: Colors.white24,
),
);
},
),
),
);
}
Widget _buildInfoTile(String label, String value) {
return Padding(
padding: const EdgeInsets.only(bottom: 12.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
Text(
label,
style: const TextStyle(
fontSize: 12,
color: Colors.white38,
fontWeight: FontWeight.w500,
),
),
const SizedBox(height: 4),
Text(
value,
style: const TextStyle(
fontSize: 14,
color: Colors.white,
fontWeight: FontWeight.w600,
),
),
],
),
);
}
}Metadata
1
likes
160
points
276
downloads
Documentation
Publisher
unverified uploader
Weekly Downloads
Metadata
A powerful web-specific metadata extraction implementation for Flutter, seamlessly integrating with web browsers to extract EXIF and media data.
Repository (GitHub)
View/report issues
License
MIT (license)
Dependencies
exif, flutter, metadata_core, web
