refactored metadata loading & listening

android/app/src/main/java/deckers/thibault/aves/channelhandlers/MetadataHandler.java

@@ -174,7 +174,7 @@ public class MetadataHandler implements MethodChannel.MethodCallHandler {
                         int count = xmpMeta.countArrayItems(XMP_DC_SCHEMA_NS, XMP_SUBJECT_PROP_NAME);
                         for (int i = 1; i < count + 1; i++) {
                             XMPProperty item = xmpMeta.getArrayItem(XMP_DC_SCHEMA_NS, XMP_SUBJECT_PROP_NAME, i);
-                            sb.append(" ").append(item.getValue());
+                            sb.append(";").append(item.getValue());
                         }
                         metadataMap.put("xmpSubjects", sb.toString());
                     }

lib/model/catalog_metadata.dart

@@ -0,0 +1,36 @@
+import 'package:geocoder/model.dart';
+
+class CatalogMetadata {
+  final int contentId, dateMillis;
+  final String xmpSubjects;
+  final double latitude, longitude;
+  Address address;
+
+  CatalogMetadata({this.contentId, this.dateMillis, this.xmpSubjects, double latitude, double longitude})
+      // Geocoder throws an IllegalArgumentException when a coordinate has a funky values like 1.7056881853375E7
+      : this.latitude = latitude == null || latitude < -90.0 || latitude > 90.0 ? null : latitude,
+        this.longitude = longitude == null || longitude < -180.0 || longitude > 180.0 ? null : longitude;
+
+  factory CatalogMetadata.fromMap(Map map) {
+    return CatalogMetadata(
+      contentId: map['contentId'],
+      dateMillis: map['dateMillis'],
+      xmpSubjects: map['xmpSubjects'],
+      latitude: map['latitude'],
+      longitude: map['longitude'],
+    );
+  }
+
+  Map<String, dynamic> toMap() => {
+        'contentId': contentId,
+        'dateMillis': dateMillis,
+        'xmpSubjects': xmpSubjects,
+        'latitude': latitude,
+        'longitude': longitude,
+      };
+
+  @override
+  String toString() {
+    return 'CatalogMetadata{contentId=$contentId, dateMillis=$dateMillis, latitude=$latitude, longitude=$longitude, xmpSubjects=$xmpSubjects}';
+  }
+}

lib/model/image_entry.dart

@@ -1,21 +1,27 @@
-import 'package:geocoder/model.dart';
+import 'package:aves/model/catalog_metadata.dart';
+import 'package:aves/model/metadata_service.dart';
+import 'package:flutter/material.dart';
+import 'package:geocoder/geocoder.dart';
+import 'package:tuple/tuple.dart';
 
 import 'mime_types.dart';
 
-class ImageEntry {
+class ImageEntry with ChangeNotifier {
-  String uri;
+  final String uri;
-  String path;
+  final String path;
-  int contentId;
+  final int contentId;
-  String mimeType;
+  final String mimeType;
-  int width;
+  final int width;
-  int height;
+  final int height;
-  int orientationDegrees;
+  final int orientationDegrees;
-  int sizeBytes;
+  final int sizeBytes;
-  String title;
+  final String title;
-  int dateModifiedSecs;
+  final int dateModifiedSecs;
-  int sourceDateTakenMillis;
+  final int sourceDateTakenMillis;
-  String bucketDisplayName;
+  final String bucketDisplayName;
-  int durationMillis;
+  final int durationMillis;
+  CatalogMetadata catalogMetadata;
+  String addressLine, addressCountry;
 
   ImageEntry({
     this.uri,
@@ -74,18 +80,18 @@ class ImageEntry {
     return 'ImageEntry{uri=$uri, path=$path}';
   }
 
-  // TODO TLAD add xmp subjects, address, etc.
-  String get searchable => title.toLowerCase();
-
   bool get isGif => mimeType == MimeTypes.MIME_GIF;
 
   bool get isVideo => mimeType.startsWith(MimeTypes.MIME_VIDEO);
 
+  bool get isCataloged => catalogMetadata != null;
+
   double get aspectRatio => height == 0 ? 1 : width / height;
 
   int get megaPixels => (width * height / 1000000).round();
 
   DateTime get bestDate {
+    if (isCataloged && catalogMetadata.dateMillis > 0) return DateTime.fromMillisecondsSinceEpoch(catalogMetadata.dateMillis);
     if (sourceDateTakenMillis != null && sourceDateTakenMillis > 0) return DateTime.fromMillisecondsSinceEpoch(sourceDateTakenMillis);
     if (dateModifiedSecs != null && dateModifiedSecs > 0) return DateTime.fromMillisecondsSinceEpoch(dateModifiedSecs * 1000);
     return null;
@@ -110,39 +116,46 @@ class ImageEntry {
     String twoDigitMinutes = twoDigits(d.inMinutes.remainder(Duration.minutesPerHour));
     return '${d.inHours}:$twoDigitMinutes:$twoDigitSeconds';
   }
+
+  bool get hasGps => isCataloged && catalogMetadata.latitude != null;
+
+  bool get isLocated => addressLine != null;
+
+  Tuple2<double, double> get latLng => isCataloged ? Tuple2(catalogMetadata.latitude, catalogMetadata.longitude) : null;
+
+  List<String> get xmpSubjects => catalogMetadata?.xmpSubjects?.split(';')?.where((tag) => tag.isNotEmpty)?.toList() ?? [];
+
+  catalog() async {
+    if (isCataloged) return;
+    catalogMetadata = await MetadataService.getCatalogMetadata(contentId, path);
+    notifyListeners();
   }
 
-class CatalogMetadata {
+  locate() async {
-  final int contentId, dateMillis;
+    if (isLocated) return;
-  final String xmpSubjects;
+    await catalog();
-  final double latitude, longitude;
+    final latitude = catalogMetadata?.latitude;
-  Address address;
+    final longitude = catalogMetadata?.longitude;
-
+    if (latitude != null && longitude != null) {
-  CatalogMetadata({this.contentId, this.dateMillis, this.xmpSubjects, double latitude, double longitude})
+      final coordinates = Coordinates(latitude, longitude);
-      // Geocoder throws an IllegalArgumentException when a coordinate has a funky values like 1.7056881853375E7
+      try {
-      : this.latitude = latitude == null || latitude < -90.0 || latitude > 90.0 ? null : latitude,
+        final addresses = await Geocoder.local.findAddressesFromCoordinates(coordinates);
-        this.longitude = longitude == null || longitude < -180.0 || longitude > 180.0 ? null : longitude;
+        if (addresses != null && addresses.length > 0) {
-
+          final address = addresses.first;
-  factory CatalogMetadata.fromMap(Map map) {
+          addressLine = address.addressLine;
-    return CatalogMetadata(
+          addressCountry = address.countryName;
-      contentId: map['contentId'],
+          notifyListeners();
-      dateMillis: map['dateMillis'],
-      xmpSubjects: map['xmpSubjects'],
-      latitude: map['latitude'],
-      longitude: map['longitude'],
-    );
         }
-
+      } catch (e) {
-  Map<String, dynamic> toMap() => {
+        debugPrint('$runtimeType addAddressToMetadata failed with exception=${e.message}');
-        'contentId': contentId,
+      }
-        'dateMillis': dateMillis,
+    }
-        'xmpSubjects': xmpSubjects,
+  }
-        'latitude': latitude,
+
-        'longitude': longitude,
+  bool search(String query) {
-      };
+    if (title.toLowerCase().contains(query)) return true;
-
+    if (catalogMetadata?.xmpSubjects?.toLowerCase()?.contains(query) ?? false) return true;
-  @override
+    if (isLocated && addressLine.toLowerCase().contains(query)) return true;
-  String toString() {
+    return false;
-    return 'CatalogMetadata{contentId=$contentId, dateMillis=$dateMillis, latitude=$latitude, longitude=$longitude, xmpSubjects=$xmpSubjects}';
   }
 }

lib/model/metadata_service.dart

@@ -1,4 +1,4 @@
-import 'package:aves/model/image_entry.dart';
+import 'package:aves/model/catalog_metadata.dart';
 import 'package:aves/model/metadata_storage_service.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';

lib/model/metadata_storage_service.dart

@@ -1,4 +1,4 @@
-import 'package:aves/model/image_entry.dart';
+import 'package:aves/model/catalog_metadata.dart';
 import 'package:flutter/foundation.dart';
 import 'package:path/path.dart';
 import 'package:sqflite/sqflite.dart';

lib/widgets/album/search_delegate.dart

@@ -51,7 +51,7 @@ class ImageSearchDelegate extends SearchDelegate<ImageEntry> {
       return SizedBox.shrink();
     }
     final lowerQuery = query.toLowerCase();
-    final matches = entries.where((entry) => entry.searchable.contains(lowerQuery)).toList();
+    final matches = entries.where((entry) => entry.search(lowerQuery)).toList();
     if (matches.isEmpty) {
       return Center(
         child: Text(

lib/widgets/debug_page.dart

@@ -1,4 +1,4 @@
-import 'package:aves/model/image_entry.dart';
+import 'package:aves/model/catalog_metadata.dart';
 import 'package:aves/model/metadata_storage_service.dart';
 import 'package:flutter/material.dart';
 

lib/widgets/fullscreen/image_page.dart

@@ -2,7 +2,7 @@ import 'dart:io';
 import 'dart:math';
 
 import 'package:aves/model/image_entry.dart';
-import 'package:aves/widgets/fullscreen/info_page.dart';
+import 'package:aves/widgets/fullscreen/info/info_page.dart';
 import 'package:aves/widgets/fullscreen/overlay_bottom.dart';
 import 'package:aves/widgets/fullscreen/overlay_top.dart';
 import 'package:aves/widgets/fullscreen/video.dart';

lib/widgets/fullscreen/info/info_page.dart

@@ -0,0 +1,126 @@
+import 'package:aves/model/image_entry.dart';
+import 'package:aves/utils/file_utils.dart';
+import 'package:aves/widgets/fullscreen/info/location_section.dart';
+import 'package:aves/widgets/fullscreen/info/metadata_section.dart';
+import 'package:aves/widgets/fullscreen/info/xmp_section.dart';
+import 'package:flutter/material.dart';
+import 'package:intl/intl.dart';
+
+class InfoPage extends StatefulWidget {
+  final ImageEntry entry;
+
+  const InfoPage({this.entry});
+
+  @override
+  State<StatefulWidget> createState() => InfoPageState();
+}
+
+class InfoPageState extends State<InfoPage> {
+  bool _scrollStartFromTop = false;
+
+  ImageEntry get entry => widget.entry;
+
+  @override
+  void initState() {
+    super.initState();
+    entry.locate();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    final date = entry.bestDate;
+    final dateText = '${DateFormat.yMMMd().format(date)} – ${DateFormat.Hm().format(date)}';
+    final resolutionText = '${entry.width} × ${entry.height}${entry.isVideo ? '' : ' (${entry.megaPixels} MP)'}';
+    return Scaffold(
+      appBar: AppBar(
+        leading: IconButton(
+          icon: Icon(Icons.arrow_upward),
+          onPressed: () => BackUpNotification().dispatch(context),
+          tooltip: 'Back to image',
+        ),
+        title: Text('Info'),
+      ),
+      body: NotificationListener(
+        onNotification: handleTopScroll,
+        child: ListView(
+          padding: EdgeInsets.all(8.0),
+          children: [
+            InfoRow('Title', entry.title),
+            InfoRow('Date', dateText),
+            if (entry.isVideo) InfoRow('Duration', entry.durationText),
+            InfoRow('Resolution', resolutionText),
+            InfoRow('Size', formatFilesize(entry.sizeBytes)),
+            InfoRow('Path', entry.path),
+            LocationSection(entry: entry),
+            XmpTagSection(entry: entry),
+            MetadataSection(entry: entry),
+          ],
+        ),
+      ),
+    );
+  }
+
+  bool handleTopScroll(Notification notification) {
+    if (notification is ScrollNotification) {
+      if (notification is ScrollStartNotification) {
+        final metrics = notification.metrics;
+        _scrollStartFromTop = metrics.pixels == metrics.minScrollExtent;
+      }
+      if (_scrollStartFromTop) {
+        if (notification is ScrollEndNotification) {
+          _scrollStartFromTop = false;
+        } else if (notification is OverscrollNotification) {
+          if (notification.overscroll < 0) {
+            BackUpNotification().dispatch(context);
+            _scrollStartFromTop = false;
+          }
+        }
+      }
+    }
+    return false;
+  }
+}
+
+class SectionRow extends StatelessWidget {
+  final String title;
+
+  const SectionRow(this.title);
+
+  @override
+  Widget build(BuildContext context) {
+    return Row(
+      children: [
+        Expanded(child: Divider(color: Colors.white70)),
+        Padding(
+          padding: EdgeInsets.all(16.0),
+          child: Text(title, style: TextStyle(fontSize: 20)),
+        ),
+        Expanded(child: Divider(color: Colors.white70)),
+      ],
+    );
+  }
+}
+
+class InfoRow extends StatelessWidget {
+  final String label, value;
+
+  const InfoRow(this.label, this.value);
+
+  @override
+  Widget build(BuildContext context) {
+    return Padding(
+      padding: EdgeInsets.symmetric(vertical: 4.0),
+      child: RichText(
+        text: TextSpan(
+          style: DefaultTextStyle.of(context).style,
+          children: [
+            TextSpan(text: '$label    ', style: TextStyle(color: Colors.white70)),
+            TextSpan(text: value),
+          ],
+        ),
+      ),
+    );
+  }
+}
+
+class BackUpNotification extends Notification {}

lib/widgets/fullscreen/info/location_section.dart

@@ -0,0 +1,69 @@
+import 'package:aves/model/image_entry.dart';
+import 'package:aves/widgets/fullscreen/info/info_page.dart';
+import 'package:flutter/material.dart';
+import 'package:google_maps_flutter/google_maps_flutter.dart';
+
+class LocationSection extends AnimatedWidget {
+  final ImageEntry entry;
+
+  const LocationSection({Key key, this.entry}) : super(key: key, listenable: entry);
+
+  @override
+  Widget build(BuildContext context) {
+    return !entry.hasGps
+        ? SizedBox.shrink()
+        : Column(
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              SectionRow('Location'),
+              ImageMap(markerId: entry.path, latLng: LatLng(entry.latLng.item1, entry.latLng.item2)),
+              if (entry.isLocated)
+                Padding(
+                  padding: EdgeInsets.only(top: 8),
+                  child: InfoRow('Address', entry.addressLine),
+                ),
+            ],
+          );
+  }
+}
+
+class ImageMap extends StatefulWidget {
+  final String markerId;
+  final LatLng latLng;
+
+  const ImageMap({Key key, this.markerId, this.latLng}) : super(key: key);
+
+  @override
+  State<StatefulWidget> createState() => ImageMapState();
+}
+
+class ImageMapState extends State<ImageMap> with AutomaticKeepAliveClientMixin {
+  @override
+  Widget build(BuildContext context) {
+    super.build(context);
+    return SizedBox(
+      height: 200,
+      child: ClipRRect(
+        borderRadius: BorderRadius.all(
+          Radius.circular(16),
+        ),
+        child: GoogleMap(
+          initialCameraPosition: CameraPosition(
+            target: widget.latLng,
+            zoom: 12,
+          ),
+          markers: [
+            Marker(
+              markerId: MarkerId(widget.markerId),
+              icon: BitmapDescriptor.defaultMarker,
+              position: widget.latLng,
+            )
+          ].toSet(),
+        ),
+      ),
+    );
+  }
+
+  @override
+  bool get wantKeepAlive => true;
+}

lib/widgets/fullscreen/info/metadata_section.dart

@@ -0,0 +1,69 @@
+import 'dart:async';
+
+import 'package:aves/model/image_entry.dart';
+import 'package:aves/model/metadata_service.dart';
+import 'package:aves/widgets/fullscreen/info/info_page.dart';
+import 'package:flutter/material.dart';
+
+class MetadataSection extends StatefulWidget {
+  final ImageEntry entry;
+
+  const MetadataSection({this.entry});
+
+  @override
+  State<StatefulWidget> createState() => MetadataSectionState();
+}
+
+class MetadataSectionState extends State<MetadataSection> {
+  Future<Map> _metadataLoader;
+
+  @override
+  void initState() {
+    super.initState();
+    initMetadataLoader();
+  }
+
+  @override
+  void didUpdateWidget(MetadataSection oldWidget) {
+    super.didUpdateWidget(oldWidget);
+    initMetadataLoader();
+  }
+
+  initMetadataLoader() async {
+    _metadataLoader = MetadataService.getAllMetadata(widget.entry.path);
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return FutureBuilder(
+      future: _metadataLoader,
+      builder: (futureContext, AsyncSnapshot<Map> snapshot) {
+        if (snapshot.hasError) return Text(snapshot.error);
+        if (snapshot.connectionState != ConnectionState.done) return SizedBox.shrink();
+        final metadataMap = snapshot.data.cast<String, Map>();
+        final directoryNames = metadataMap.keys.toList()..sort();
+        return Column(
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            SectionRow('Metadata'),
+            ...directoryNames.expand(
+              (directoryName) {
+                final directory = metadataMap[directoryName];
+                final tagKeys = directory.keys.toList()..sort();
+                return [
+                  if (directoryName.isNotEmpty)
+                    Padding(
+                      padding: EdgeInsets.symmetric(vertical: 4.0),
+                      child: Text(directoryName, style: TextStyle(fontSize: 18)),
+                    ),
+                  ...tagKeys.map((tagKey) => InfoRow(tagKey, directory[tagKey])),
+                  SizedBox(height: 16),
+                ];
+              },
+            )
+          ],
+        );
+      },
+    );
+  }
+}

lib/widgets/fullscreen/info/xmp_section.dart

@@ -0,0 +1,33 @@
+import 'package:aves/model/image_entry.dart';
+import 'package:aves/widgets/fullscreen/info/info_page.dart';
+import 'package:flutter/material.dart';
+
+class XmpTagSection extends AnimatedWidget {
+  final ImageEntry entry;
+
+  const XmpTagSection({Key key, this.entry}) : super(key: key, listenable: entry);
+
+  @override
+  Widget build(BuildContext context) {
+    final tags = entry.xmpSubjects;
+    return tags.isEmpty
+        ? SizedBox.shrink()
+        : Column(
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              SectionRow('XMP Tags'),
+              Wrap(
+                children: tags
+                    .map((tag) => Padding(
+                          padding: EdgeInsets.symmetric(horizontal: 4.0),
+                          child: Chip(
+                            backgroundColor: Colors.indigo,
+                            label: Text(tag),
+                          ),
+                        ))
+                    .toList(),
+              ),
+            ],
+          );
+  }
+}

lib/widgets/fullscreen/info_page.dart

@@ -1,273 +0,0 @@
-import 'dart:async';
-
-import 'package:aves/model/image_entry.dart';
-import 'package:aves/model/metadata_service.dart';
-import 'package:aves/utils/file_utils.dart';
-import 'package:flutter/material.dart';
-import 'package:geocoder/geocoder.dart';
-import 'package:google_maps_flutter/google_maps_flutter.dart';
-import 'package:intl/intl.dart';
-
-class InfoPage extends StatefulWidget {
-  final ImageEntry entry;
-
-  const InfoPage({this.entry});
-
-  @override
-  State<StatefulWidget> createState() => InfoPageState();
-}
-
-class InfoPageState extends State<InfoPage> {
-  Future<Map> _metadataLoader;
-  Future<CatalogMetadata> _catalogLoader;
-  bool _scrollStartFromTop = false;
-
-  ImageEntry get entry => widget.entry;
-
-  @override
-  void initState() {
-    super.initState();
-    initMetadataLoader();
-  }
-
-  @override
-  void didUpdateWidget(InfoPage oldWidget) {
-    super.didUpdateWidget(oldWidget);
-    initMetadataLoader();
-  }
-
-  initMetadataLoader() {
-    _catalogLoader = MetadataService.getCatalogMetadata(entry.contentId, entry.path).then(addAddressToMetadata);
-    _metadataLoader = MetadataService.getAllMetadata(entry.path);
-  }
-
-  Future<CatalogMetadata> addAddressToMetadata(metadata) async {
-    if (metadata == null) return null;
-    final latitude = metadata.latitude;
-    final longitude = metadata.longitude;
-    if (latitude != null && longitude != null) {
-      final coordinates = Coordinates(latitude, longitude);
-      try {
-        final addresses = await Geocoder.local.findAddressesFromCoordinates(coordinates);
-        if (addresses != null && addresses.length > 0) {
-          metadata.address = addresses.first;
-        }
-      } catch (e) {
-        debugPrint('$runtimeType addAddressToMetadata failed with exception=${e.message}');
-      }
-    }
-    return metadata;
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    final date = entry.bestDate;
-    final dateText = '${DateFormat.yMMMd().format(date)} – ${DateFormat.Hm().format(date)}';
-    final resolutionText = '${entry.width} × ${entry.height}${entry.isVideo ? '' : ' (${entry.megaPixels} MP)'}';
-    return Scaffold(
-      appBar: AppBar(
-        leading: IconButton(
-          icon: Icon(Icons.arrow_upward),
-          onPressed: () => BackUpNotification().dispatch(context),
-          tooltip: 'Back to image',
-        ),
-        title: Text('Info'),
-      ),
-      body: NotificationListener(
-        onNotification: (notification) {
-          if (notification is ScrollNotification) {
-            if (notification is ScrollStartNotification) {
-              final metrics = notification.metrics;
-              _scrollStartFromTop = metrics.pixels == metrics.minScrollExtent;
-            }
-            if (_scrollStartFromTop) {
-              if (notification is ScrollEndNotification) {
-                _scrollStartFromTop = false;
-              } else if (notification is OverscrollNotification) {
-                if (notification.overscroll < 0) {
-                  BackUpNotification().dispatch(context);
-                  _scrollStartFromTop = false;
-                }
-              }
-            }
-          }
-          return false;
-        },
-        child: ListView(
-          padding: EdgeInsets.all(8.0),
-          children: [
-            InfoRow('Title', entry.title),
-            InfoRow('Date', dateText),
-            if (entry.isVideo) InfoRow('Duration', entry.durationText),
-            InfoRow('Resolution', resolutionText),
-            InfoRow('Size', formatFilesize(entry.sizeBytes)),
-            InfoRow('Path', entry.path),
-            FutureBuilder(
-              future: _catalogLoader,
-              builder: (futureContext, AsyncSnapshot<CatalogMetadata> snapshot) {
-                if (snapshot.hasError) return Text(snapshot.error);
-                if (snapshot.connectionState != ConnectionState.done) return SizedBox.shrink();
-                final metadata = snapshot.data;
-                return Column(
-                  crossAxisAlignment: CrossAxisAlignment.start,
-                  children: [
-                    ..._buildLocationSection(metadata?.latitude, metadata?.longitude, metadata?.address),
-                    ..._buildTagSection(metadata?.xmpSubjects),
-                  ],
-                );
-              },
-            ),
-            FutureBuilder(
-              future: _metadataLoader,
-              builder: (futureContext, AsyncSnapshot<Map> snapshot) {
-                if (snapshot.hasError) return Text(snapshot.error);
-                if (snapshot.connectionState != ConnectionState.done) return SizedBox.shrink();
-                final metadataMap = snapshot.data.cast<String, Map>();
-                final directoryNames = metadataMap.keys.toList()..sort();
-                return Column(
-                  crossAxisAlignment: CrossAxisAlignment.start,
-                  children: [
-                    SectionRow('Metadata'),
-                    ...directoryNames.expand(
-                      (directoryName) {
-                        final directory = metadataMap[directoryName];
-                        final tagKeys = directory.keys.toList()..sort();
-                        return [
-                          if (directoryName.isNotEmpty)
-                            Padding(
-                              padding: EdgeInsets.symmetric(vertical: 4.0),
-                              child: Text(directoryName, style: TextStyle(fontSize: 18)),
-                            ),
-                          ...tagKeys.map((tagKey) => InfoRow(tagKey, directory[tagKey])),
-                          SizedBox(height: 16),
-                        ];
-                      },
-                    )
-                  ],
-                );
-              },
-            ),
-          ],
-        ),
-      ),
-    );
-  }
-
-  List<Widget> _buildLocationSection(double latitude, double longitude, Address address) {
-    if (latitude == null || longitude == null) return [];
-    return [
-      SectionRow('Location'),
-      ImageMap(markerId: entry.path, latLng: LatLng(latitude, longitude)),
-      if (address != null)
-        Padding(
-          padding: EdgeInsets.only(top: 8),
-          child: InfoRow('Address', address.addressLine),
-        ),
-    ];
-  }
-
-  List<Widget> _buildTagSection(String xmpSubjects) {
-    if (xmpSubjects == null) return [];
-    return [
-      SectionRow('XMP Tags'),
-      Wrap(
-        children: xmpSubjects
-            .split(' ')
-            .where((word) => word.isNotEmpty)
-            .map((word) => Padding(
-                  padding: EdgeInsets.symmetric(horizontal: 4.0),
-                  child: Chip(
-                    backgroundColor: Colors.indigo,
-                    label: Text(word),
-                  ),
-                ))
-            .toList(),
-      ),
-    ];
-  }
-}
-
-class ImageMap extends StatefulWidget {
-  final String markerId;
-  final LatLng latLng;
-
-  const ImageMap({Key key, this.markerId, this.latLng}) : super(key: key);
-
-  @override
-  State<StatefulWidget> createState() => ImageMapState();
-}
-
-class ImageMapState extends State<ImageMap> with AutomaticKeepAliveClientMixin {
-  @override
-  Widget build(BuildContext context) {
-    super.build(context);
-    return SizedBox(
-      height: 200,
-      child: ClipRRect(
-        borderRadius: BorderRadius.all(
-          Radius.circular(16),
-        ),
-        child: GoogleMap(
-          initialCameraPosition: CameraPosition(
-            target: widget.latLng,
-            zoom: 12,
-          ),
-          markers: [
-            Marker(
-              markerId: MarkerId(widget.markerId),
-              icon: BitmapDescriptor.defaultMarker,
-              position: widget.latLng,
-            )
-          ].toSet(),
-        ),
-      ),
-    );
-  }
-
-  @override
-  bool get wantKeepAlive => true;
-}
-
-class SectionRow extends StatelessWidget {
-  final String title;
-
-  const SectionRow(this.title);
-
-  @override
-  Widget build(BuildContext context) {
-    return Row(
-      children: [
-        Expanded(child: Divider(color: Colors.white70)),
-        Padding(
-          padding: EdgeInsets.all(16.0),
-          child: Text(title, style: TextStyle(fontSize: 20)),
-        ),
-        Expanded(child: Divider(color: Colors.white70)),
-      ],
-    );
-  }
-}
-
-class InfoRow extends StatelessWidget {
-  final String label, value;
-
-  const InfoRow(this.label, this.value);
-
-  @override
-  Widget build(BuildContext context) {
-    return Padding(
-      padding: EdgeInsets.symmetric(vertical: 4.0),
-      child: RichText(
-        text: TextSpan(
-          style: DefaultTextStyle.of(context).style,
-          children: [
-            TextSpan(text: '$label    ', style: TextStyle(color: Colors.white70)),
-            TextSpan(text: value),
-          ],
-        ),
-      ),
-    );
-  }
-}
-
-class BackUpNotification extends Notification {}

pubspec.lock

@@ -205,6 +205,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.0"
+  tuple:
+    dependency: "direct main"
+    description:
+      name: tuple
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.2"
   typed_data:
     dependency: transitive
     description:

pubspec.yaml

@@ -30,6 +30,7 @@ dependencies:
   screen:
   sqflite:
   transparent_image:
+  tuple:
 
 dev_dependencies:
   flutter_test: