implemented geocoding instead of using packages, switched to flutter master

android/app/src/main/kotlin/deckers/thibault/aves/MainActivity.kt

@@ -34,6 +34,7 @@ class MainActivity : FlutterActivity() {
         MethodChannel(messenger, AppShortcutHandler.CHANNEL).setMethodCallHandler(AppShortcutHandler(this))
         MethodChannel(messenger, DebugHandler.CHANNEL).setMethodCallHandler(DebugHandler(this))
         MethodChannel(messenger, ImageFileHandler.CHANNEL).setMethodCallHandler(ImageFileHandler(this))
+        MethodChannel(messenger, GeocodingHandler.CHANNEL).setMethodCallHandler(GeocodingHandler(this))
         MethodChannel(messenger, MediaStoreHandler.CHANNEL).setMethodCallHandler(MediaStoreHandler(this))
         MethodChannel(messenger, MetadataHandler.CHANNEL).setMethodCallHandler(MetadataHandler(this))
         MethodChannel(messenger, StorageHandler.CHANNEL).setMethodCallHandler(StorageHandler(this))

android/app/src/main/kotlin/deckers/thibault/aves/channel/calls/GeocodingHandler.kt

@@ -0,0 +1,73 @@
+package deckers.thibault.aves.channel.calls
+
+import android.content.Context
+import android.location.Address
+import android.location.Geocoder
+import io.flutter.plugin.common.MethodCall
+import io.flutter.plugin.common.MethodChannel
+import io.flutter.plugin.common.MethodChannel.MethodCallHandler
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.GlobalScope
+import kotlinx.coroutines.launch
+
+// as of 2021/03/10, geocoding packages exist but:
+// - `geocoder` is unmaintained
+// - `geocoding` method does not return `addressLine` (v2.0.0)
+class GeocodingHandler(private val context: Context) : MethodCallHandler {
+    private var geocoder: Geocoder? = null
+
+    override fun onMethodCall(call: MethodCall, result: MethodChannel.Result) {
+        when (call.method) {
+            "getAddress" -> GlobalScope.launch(Dispatchers.IO) { Coresult.safe(call, result, ::getAddress) }
+            else -> result.notImplemented()
+        }
+    }
+
+    private fun getAddress(call: MethodCall, result: MethodChannel.Result) {
+        val latitude = call.argument<Number>("latitude")?.toDouble()
+        val longitude = call.argument<Number>("longitude")?.toDouble()
+        val maxResults = call.argument<Int>("maxResults") ?: 1
+        if (latitude == null || longitude == null) {
+            result.error("getAddress-args", "failed because of missing arguments", null)
+            return
+        }
+
+        if (!Geocoder.isPresent()) {
+            result.error("getAddress-unavailable", "Geocoder is unavailable", null)
+            return
+        }
+
+        geocoder = geocoder ?: Geocoder(context)
+        val addresses = try {
+            geocoder!!.getFromLocation(latitude, longitude, maxResults) ?: ArrayList<Address>()
+        } catch (e: Exception) {
+            result.error("getAddress-exception", "failed to get address", e.message)
+            return
+        }
+
+        if (addresses.isEmpty()) {
+            result.error("getAddress-empty", "failed to find any address for latitude=$latitude, longitude=$longitude", null)
+        } else {
+            val addressMapList: ArrayList<Map<String, String?>> = ArrayList(addresses.map { address ->
+                hashMapOf(
+                    "addressLine" to (0..address.maxAddressLineIndex).joinToString(", ") { i -> address.getAddressLine(i) },
+                    "adminArea" to address.adminArea,
+                    "countryCode" to address.countryCode,
+                    "countryName" to address.countryName,
+                    "featureName" to address.featureName,
+                    "locality" to address.locality,
+                    "postalCode" to address.postalCode,
+                    "subAdminArea" to address.subAdminArea,
+                    "subLocality" to address.subLocality,
+                    "subThoroughfare" to address.subThoroughfare,
+                    "thoroughfare" to address.thoroughfare,
+                )
+            })
+            result.success(addressMapList)
+        }
+    }
+
+    companion object {
+        const val CHANNEL = "deckers.thibault/aves/geocoding"
+    }
+}

lib/model/entry.dart

@@ -7,6 +7,7 @@ import 'package:aves/model/favourite_repo.dart';
 import 'package:aves/model/metadata.dart';
 import 'package:aves/model/metadata_db.dart';
 import 'package:aves/model/multipage.dart';
+import 'package:aves/services/geocoding_service.dart';
 import 'package:aves/services/image_file_service.dart';
 import 'package:aves/services/metadata_service.dart';
 import 'package:aves/services/service_policy.dart';
@@ -18,7 +19,6 @@ import 'package:collection/collection.dart';
 import 'package:country_code/country_code.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
-import 'package:geocoder/geocoder.dart';
 import 'package:latlong/latlong.dart';
 import 'package:path/path.dart' as ppath;
 
@@ -45,10 +45,6 @@ class AvesEntry {
 
   final AChangeNotifier imageChangeNotifier = AChangeNotifier(), metadataChangeNotifier = AChangeNotifier(), addressChangeNotifier = AChangeNotifier();
 
-  // Local geocoding requires Google Play Services
-  // Google remote geocoding requires an API key and is not free
-  final Future<List<Address>> Function(Coordinates coordinates) _findAddresses = Geocoder.local.findAddressesFromCoordinates;
-
   // TODO TLAD make it dynamic if it depends on OS/lib versions
   static const List<String> undecodable = [MimeTypes.crw, MimeTypes.djvu, MimeTypes.psd];
 
@@ -482,9 +478,8 @@ class AvesEntry {
   // full reverse geocoding, requiring Play Services and some connectivity
   Future<void> locatePlace({@required bool background}) async {
     if (!hasGps || hasFineAddress) return;
-    final coordinates = latLng;
     try {
-      Future<List<Address>> call() => _findAddresses(Coordinates(coordinates.latitude, coordinates.longitude));
+      Future<List<Address>> call() => GeocodingService.getAddress(latLng);
       final addresses = await (background
           ? servicePolicy.call(
               call,
@@ -507,22 +502,21 @@ class AvesEntry {
         );
       }
     } catch (error, stack) {
-      debugPrint('$runtimeType locate failed with path=$path coordinates=$coordinates error=$error\n$stack');
+      debugPrint('$runtimeType locate failed with path=$path coordinates=$latLng error=$error\n$stack');
     }
   }
 
   Future<String> findAddressLine() async {
     if (!hasGps) return null;
 
-    final coordinates = latLng;
     try {
-      final addresses = await _findAddresses(Coordinates(coordinates.latitude, coordinates.longitude));
+      final addresses = await GeocodingService.getAddress(latLng);
       if (addresses != null && addresses.isNotEmpty) {
         final address = addresses.first;
         return address.addressLine;
       }
     } catch (error, stack) {
-      debugPrint('$runtimeType findAddressLine failed with path=$path coordinates=$coordinates error=$error\n$stack');
+      debugPrint('$runtimeType findAddressLine failed with path=$path coordinates=$latLng error=$error\n$stack');
     }
     return null;
   }

lib/model/metadata.dart

@@ -1,6 +1,6 @@
+import 'package:aves/services/geocoding_service.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/widgets.dart';
-import 'package:geocoder/model.dart';
 import 'package:intl/intl.dart';
 
 class DateMetadata {

lib/services/geocoding_service.dart

@@ -0,0 +1,56 @@
+import 'dart:async';
+
+import 'package:flutter/foundation.dart';
+import 'package:flutter/services.dart';
+import 'package:latlong/latlong.dart';
+
+class GeocodingService {
+  static const platform = MethodChannel('deckers.thibault/aves/geocoding');
+
+  // geocoding requires Google Play Services
+  static Future<List<Address>> getAddress(LatLng coordinates) async {
+    try {
+      final result = await platform.invokeMethod('getAddress', <String, dynamic>{
+        'latitude': coordinates.latitude,
+        'longitude': coordinates.longitude,
+      });
+      return (result as List).cast<Map>().map((map) => Address.fromMap(map)).toList();
+    } on PlatformException catch (e) {
+      debugPrint('getAddress failed with code=${e.code}, exception=${e.message}, details=${e.details}}');
+    }
+    return [];
+  }
+}
+
+@immutable
+class Address {
+  final String addressLine, adminArea, countryCode, countryName, featureName, locality, postalCode, subAdminArea, subLocality, subThoroughfare, thoroughfare;
+
+  const Address({
+    this.addressLine,
+    this.adminArea,
+    this.countryCode,
+    this.countryName,
+    this.featureName,
+    this.locality,
+    this.postalCode,
+    this.subAdminArea,
+    this.subLocality,
+    this.subThoroughfare,
+    this.thoroughfare,
+  });
+
+  factory Address.fromMap(Map map) => Address(
+        addressLine: map['addressLine'],
+        adminArea: map['adminArea'],
+        countryCode: map['countryCode'],
+        countryName: map['countryName'],
+        featureName: map['featureName'],
+        locality: map['locality'],
+        postalCode: map['postalCode'],
+        subAdminArea: map['subAdminArea'],
+        subLocality: map['subLocality'],
+        subThoroughfare: map['subThoroughfare'],
+        thoroughfare: map['thoroughfare'],
+      );
+}

pubspec.lock

@@ -7,14 +7,14 @@ packages:
       name: _fe_analyzer_shared
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "14.0.0"
+    version: "17.0.0"
   analyzer:
     dependency: transitive
     description:
       name: analyzer
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.41.2"
+    version: "1.1.0"
   ansicolor:
     dependency: transitive
     description:
@@ -28,14 +28,14 @@ packages:
       name: archive
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.13"
+    version: "3.1.2"
   args:
     dependency: transitive
     description:
       name: args
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.0"
+    version: "2.0.0"
   async:
     dependency: transitive
     description:
@@ -49,7 +49,7 @@ packages:
       name: barcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.17.1"
+    version: "2.1.0"
   boolean_selector:
     dependency: transitive
     description:
@@ -77,14 +77,14 @@ packages:
       name: charts_common
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.9.0"
+    version: "0.10.0"
   charts_flutter:
     dependency: "direct main"
     description:
       name: charts_flutter
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.9.0"
+    version: "0.10.0"
   cli_util:
     dependency: transitive
     description:
@@ -126,7 +126,7 @@ packages:
       name: connectivity_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.0.1"
   console_log_handler:
     dependency: transitive
     description:
@@ -140,7 +140,7 @@ packages:
       name: convert
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.1"
+    version: "3.0.0"
   country_code:
     dependency: "direct main"
     description:
@@ -161,7 +161,7 @@ packages:
       name: crypto
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.5"
+    version: "3.0.0"
   decorated_icon:
     dependency: "direct main"
     description:
@@ -205,21 +205,21 @@ packages:
       name: file
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "6.0.0"
+    version: "6.1.0"
   firebase:
     dependency: transitive
     description:
       name: firebase
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "7.3.3"
+    version: "9.0.0"
   firebase_analytics:
     dependency: "direct main"
     description:
       name: firebase_analytics
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "7.0.1"
+    version: "7.1.1"
   firebase_analytics_platform_interface:
     dependency: transitive
     description:
@@ -233,42 +233,42 @@ packages:
       name: firebase_analytics_web
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.1"
+    version: "0.2.0+1"
   firebase_core:
     dependency: "direct main"
     description:
       name: firebase_core
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.7.0"
+    version: "1.0.1"
   firebase_core_platform_interface:
     dependency: transitive
     description:
       name: firebase_core_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.1"
+    version: "4.0.0"
   firebase_core_web:
     dependency: transitive
     description:
       name: firebase_core_web
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.1+3"
+    version: "1.0.1"
   firebase_crashlytics:
     dependency: "direct main"
     description:
       name: firebase_crashlytics
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.0+1"
+    version: "1.0.0"
   firebase_crashlytics_platform_interface:
     dependency: transitive
     description:
       name: firebase_crashlytics_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.6"
+    version: "2.0.0"
   flushbar:
     dependency: "direct main"
     description:
@@ -341,7 +341,7 @@ packages:
       name: flutter_markdown
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.5.2"
+    version: "0.6.0"
   flutter_plugin_android_lifecycle:
     dependency: transitive
     description:
@@ -362,7 +362,7 @@ packages:
       name: flutter_svg
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.19.3"
+    version: "0.21.0-nullsafety.0"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -378,20 +378,13 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
-  geocoder:
-    dependency: "direct main"
-    description:
-      name: geocoder
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.2.1"
   github:
     dependency: "direct main"
     description:
       name: github
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "7.0.4"
+    version: "8.0.1"
   glob:
     dependency: transitive
     description:
@@ -419,7 +412,7 @@ packages:
       name: google_maps_flutter_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.0.1"
   highlight:
     dependency: transitive
     description:
@@ -433,7 +426,7 @@ packages:
       name: http
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.2"
+    version: "0.13.0"
   http_multi_server:
     dependency: transitive
     description:
@@ -447,14 +440,14 @@ packages:
       name: http_parser
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.1.4"
+    version: "4.0.0"
   image:
     dependency: transitive
     description:
       name: image
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.19"
+    version: "3.0.1"
   intl:
     dependency: "direct main"
     description:
@@ -482,7 +475,7 @@ packages:
       name: json_annotation
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.1.1"
+    version: "4.0.0"
   latlong:
     dependency: "direct main"
     description:
@@ -510,7 +503,7 @@ packages:
       name: markdown
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.0"
+    version: "4.0.0"
   matcher:
     dependency: transitive
     description:
@@ -580,7 +573,7 @@ packages:
       name: package_config
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.9.3"
+    version: "2.0.0"
   package_info:
     dependency: "direct main"
     description:
@@ -615,14 +608,14 @@ packages:
       name: path_drawing
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.4.1+1"
+    version: "0.5.0-nullsafety.0"
   path_parsing:
     dependency: transitive
     description:
       name: path_parsing
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.4"
+    version: "0.2.0-nullsafety.0"
   path_provider_linux:
     dependency: transitive
     description:
@@ -636,7 +629,7 @@ packages:
       name: path_provider_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.0.1"
   path_provider_windows:
     dependency: transitive
     description:
@@ -650,7 +643,7 @@ packages:
       name: pdf
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.0"
+    version: "3.0.1"
   pedantic:
     dependency: "direct main"
     description:
@@ -671,21 +664,21 @@ packages:
       name: permission_handler
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "5.1.0+2"
+    version: "6.0.1"
   permission_handler_platform_interface:
     dependency: transitive
     description:
       name: permission_handler_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.2"
+    version: "3.0.0+1"
   petitparser:
     dependency: transitive
     description:
       name: petitparser
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.1.0"
+    version: "4.0.2"
   platform:
     dependency: transitive
     description:
@@ -699,7 +692,7 @@ packages:
       name: plugin_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.3"
+    version: "2.0.0"
   pool:
     dependency: transitive
     description:
@@ -720,14 +713,14 @@ packages:
       name: printing
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.1.0"
+    version: "5.0.2"
   process:
     dependency: transitive
     description:
       name: process
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.0.0"
+    version: "4.1.0"
   proj4dart:
     dependency: transitive
     description:
@@ -755,7 +748,7 @@ packages:
       name: qr
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.3.0"
+    version: "2.0.0"
   quiver:
     dependency: transitive
     description:
@@ -811,28 +804,28 @@ packages:
       name: shelf
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.7.9"
+    version: "1.0.0"
   shelf_packages_handler:
     dependency: transitive
     description:
       name: shelf_packages_handler
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.1"
+    version: "3.0.0"
   shelf_static:
     dependency: transitive
     description:
       name: shelf_static
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.9+2"
+    version: "1.0.0"
   shelf_web_socket:
     dependency: transitive
     description:
       name: shelf_web_socket
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.4+1"
+    version: "1.0.0"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -858,7 +851,7 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.8.0"
+    version: "1.8.1"
   sqflite:
     dependency: "direct main"
     description:
@@ -914,7 +907,7 @@ packages:
       name: sync_http
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.0"
+    version: "0.3.0"
   synchronized:
     dependency: transitive
     description:
@@ -1005,7 +998,7 @@ packages:
       name: url_launcher_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.1"
+    version: "2.0.2"
   url_launcher_web:
     dependency: transitive
     description:
@@ -1047,7 +1040,7 @@ packages:
       name: vm_service
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "5.5.0"
+    version: "6.0.1-nullsafety.1"
   watcher:
     dependency: transitive
     description:
@@ -1061,14 +1054,14 @@ packages:
       name: web_socket_channel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "2.0.0"
   webdriver:
     dependency: transitive
     description:
       name: webdriver
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.2"
+    version: "3.0.0"
   webkit_inspection_protocol:
     dependency: transitive
     description:
@@ -1103,7 +1096,7 @@ packages:
       name: xml
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "4.5.1"
+    version: "5.0.2"
   yaml:
     dependency: transitive
     description:
@@ -1113,4 +1106,4 @@ packages:
     version: "3.1.0"
 sdks:
   dart: ">=2.12.0 <3.0.0"
-  flutter: ">=1.24.0-10.1.pre"
+  flutter: ">=1.24.0-10"

pubspec.yaml

@@ -9,15 +9,13 @@ environment:
 
 # TODO TLAD merge null safe `expansion_tile_card` to fork
 # TODO TLAD migrate from `flushbar` to basic SnackBar or `another_flushbar`
-# TODO TLAD migrate from `geocoder` to `geocoding` (or reimplement) - https://github.com/Baseflow/flutter-geocoding/issues/37
 # TODO TLAD remove explicit `overlay_support` version when 1.2.0 is stable (1.0.5 uses deprecated `ancestorWidgetOfExactType`)
-# TODO TLAD upgrade printing to >=5 when `flutter_driver` dependency upgrade get on the right channel
-#   https://github.com/flutter/flutter/pull/75370
-#   https://github.com/flutter/flutter/blob/master/packages/flutter_driver/pubspec.yaml
-#   otherwise, we get this conundrum:
-#     every version of flutter_driver from sdk depends on crypto 2.1.5
-#     pdf >=3.0.1 depends on crypto ^3.0.0
-#     printing >=5.0.1 depends on pdf ^3.0.1
+
+# TODO TLAD switch to Flutter dev/beta when possible, currently on master because of the following mess:
+# printing >=5.0.1 depends on pdf ^3.0.1, pdf >=3.0.1 depends on crypto ^3.0.0 and archive ^3.1.0
+# but `flutter_driver` (shipped with Flutter) dependencies are too old in stable v2.0.1
+# bump `crypto` and others - 2021/02/05 https://github.com/flutter/flutter/commit/bc1cf4945841ba5874f5262b8146d52750e7c11f
+# bump `archive` from 3.0.0 to 3.1.2 - 2021/03/04 https://github.com/flutter/flutter/commit/ddcb8d7d6d3fcedc906b2f1bf26b73c018d3dc28
 
 # not null safe, as of 2021/03/09
 # `charts_flutter` - https://github.com/google/charts/issues/579
@@ -26,7 +24,6 @@ environment:
 # `flushbar` - discontinued
 # `flutter_ijkplayer` - unmaintained?
 # `flutter_map` - https://github.com/fleaflet/flutter_map/issues/829
-# `geocoder` - unmaintained? - https://github.com/aloisdeniel/flutter_geocoder/issues/61
 # `latlong` - archived - migrate to maps_toolkit? cf https://github.com/fleaflet/flutter_map/pull/750
 # `palette_generator` - https://github.com/flutter/packages/pull/287
 # `panorama` - no issue/PR
@@ -61,7 +58,6 @@ dependencies:
   flutter_markdown:
   flutter_staggered_animations:
   flutter_svg:
-  geocoder:
   github:
   google_api_availability:
   google_maps_flutter:
@@ -76,7 +72,7 @@ dependencies:
   pedantic:
   percent_indicator:
   permission_handler:
-  printing: 4.1.0
+  printing:
   provider:
   shared_preferences:
   sqflite:
@@ -86,10 +82,6 @@ dependencies:
   version:
   xml:
 
-dependency_overrides:
-  # because of `charts_flutter`
-  intl: '>=0.17.0'
-
 dev_dependencies:
   flutter_test:
     sdk: flutter