87 lines
3.2 KiB
Dart
87 lines
3.2 KiB
Dart
import 'package:aves/model/image_entry.dart';
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import 'package:aves/model/image_metadata.dart';
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import 'package:aves/services/service_policy.dart';
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import 'package:flutter/foundation.dart';
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import 'package:flutter/services.dart';
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class MetadataService {
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static const platform = MethodChannel('deckers.thibault/aves/metadata');
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// return Map<Map<Key, Value>> (map of directories, each directory being a map of metadata label and value description)
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static Future<Map> getAllMetadata(ImageEntry entry) async {
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if (entry.isSvg) return null;
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try {
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final result = await platform.invokeMethod('getAllMetadata', <String, dynamic>{
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'mimeType': entry.mimeType,
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'uri': entry.uri,
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});
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return result as Map;
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} on PlatformException catch (e) {
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debugPrint('getAllMetadata failed with code=${e.code}, exception=${e.message}, details=${e.details}');
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}
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return {};
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}
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static Future<CatalogMetadata> getCatalogMetadata(ImageEntry entry, {bool background = false}) async {
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if (entry.isSvg) return null;
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final call = () async {
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try {
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// return map with:
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// 'dateMillis': date taken in milliseconds since Epoch (long)
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// 'isAnimated': animated gif/webp (bool)
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// 'latitude': latitude (double)
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// 'longitude': longitude (double)
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// 'videoRotation': video rotation degrees (int)
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// 'xmpSubjects': ';' separated XMP subjects (string)
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// 'xmpTitleDescription': XMP title or XMP description (string)
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final result = await platform.invokeMethod('getCatalogMetadata', <String, dynamic>{
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'mimeType': entry.mimeType,
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'uri': entry.uri,
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}) as Map;
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result['contentId'] = entry.contentId;
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return CatalogMetadata.fromMap(result);
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} on PlatformException catch (e) {
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debugPrint('getCatalogMetadata failed with code=${e.code}, exception=${e.message}, details=${e.details}');
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}
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return null;
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};
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return background
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? servicePolicy.call(
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call,
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priority: ServiceCallPriority.getMetadata,
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)
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: call();
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}
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static Future<OverlayMetadata> getOverlayMetadata(ImageEntry entry) async {
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if (entry.isSvg) return null;
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try {
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// return map with string descriptions for: 'aperture' 'exposureTime' 'focalLength' 'iso'
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final result = await platform.invokeMethod('getOverlayMetadata', <String, dynamic>{
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'mimeType': entry.mimeType,
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'uri': entry.uri,
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}) as Map;
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return OverlayMetadata.fromMap(result);
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} on PlatformException catch (e) {
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debugPrint('getOverlayMetadata failed with code=${e.code}, exception=${e.message}, details=${e.details}');
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}
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return null;
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}
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static Future<Map> getContentResolverMetadata(ImageEntry entry) async {
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try {
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// return map with all data available from the content resolver
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final result = await platform.invokeMethod('getContentResolverMetadata', <String, dynamic>{
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'mimeType': entry.mimeType,
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'uri': entry.uri,
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}) as Map;
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return result;
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} on PlatformException catch (e) {
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debugPrint('getContentResolverMetadata failed with code=${e.code}, exception=${e.message}, details=${e.details}');
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}
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return {};
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}
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}
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