fix: Time zone data not set in ParseInstallation

packages/dart/CHANGELOG.md

@@ -1,3 +1,9 @@
+## [3.1.10](https://github.com/parse-community/Parse-SDK-Flutter/compare/dart-3.1.9...dart-3.1.10) (2023-01-16)
+
+### Bug Fixes
+
+* Time zone data not set in `ParseInstallation` ([#96](https://github.com/parse-community/Parse-SDK-Flutter/issues/96))
+
 ## [3.1.9](https://github.com/parse-community/Parse-SDK-Flutter/compare/dart-3.1.8...dart-3.1.9) (2022-12-25)
 
 ### Bug Fixes

packages/dart/lib/parse_server_sdk.dart

@@ -12,6 +12,8 @@ import 'package:path/path.dart' as path;
 import 'package:sembast/sembast.dart';
 import 'package:sembast/sembast_io.dart';
 import 'package:sembast_web/sembast_web.dart';
+import 'package:timezone/data/latest.dart' as tz;
+import 'package:timezone/timezone.dart' as tz;
 import 'package:uuid/uuid.dart';
 import 'package:web_socket_channel/web_socket_channel.dart';
 import 'package:xxtea/xxtea.dart';

packages/dart/lib/src/base/parse_constants.dart

@@ -1,7 +1,7 @@
 part of flutter_parse_sdk;
 
 // Library
-const String keySdkVersion = '3.1.9';
+const String keySdkVersion = '3.1.10';
 const String keyLibraryName = 'Flutter Parse SDK';
 
 // End Points

packages/dart/lib/src/objects/parse_installation.dart

@@ -85,6 +85,7 @@ class ParseInstallation extends ParseObject {
     set<String?>(keyLocaleIdentifier, ParseCoreData().locale);
 
     //Timezone
+    set<String>(keyTimeZone, _getNameLocalTimeZone());
 
     //App info
     set<String?>(keyAppName, ParseCoreData().appName);
@@ -93,6 +94,24 @@ class ParseInstallation extends ParseObject {
     set<String>(keyParseVersion, keySdkVersion);
   }
 
+  String _getNameLocalTimeZone() {
+    tz.initializeTimeZones();
+    var locations = tz.timeZoneDatabase.locations;
+
+    int milliseconds = DateTime.now().timeZoneOffset.inMilliseconds;
+    String name = "";
+
+    locations.forEach((key, value) {
+      for (var element in value.zones) {
+        if (element.offset == milliseconds) {
+          name = value.name;
+          break;
+        }
+      }
+    });
+    return name;
+  }
+
   @override
   Future<ParseResponse> create({bool allowCustomObjectId = false}) async {
     final bool isCurrent = await ParseInstallation.isCurrent(this);

packages/dart/pubspec.yaml

@@ -1,6 +1,6 @@
 name: parse_server_sdk
 description: Dart plugin for Parse Server, (https://parseplatform.org), (https://back4app.com)
-version: 3.1.9
+version: 3.1.10
 homepage: https://github.com/parse-community/Parse-SDK-Flutter
 
 environment:
@@ -22,6 +22,7 @@ dependencies:
   meta: ^1.7.0
   path: ^1.8.1
   mime_type: ^1.0.0
+  timezone: ^0.9.0
 
 dev_dependencies:
   lints: ^1.0.1

packages/dart/test/parse_installation_test.dart

@@ -0,0 +1,30 @@
+import 'package:parse_server_sdk/parse_server_sdk.dart';
+import 'package:test/test.dart';
+
+void main() {
+  test('should return true for exist TimeZone.', () async {
+    // arrange
+    await Parse().initialize(
+      'appId',
+      'https://example.com',
+      debug: true,
+      // to prevent automatic detection
+      fileDirectory: 'someDirectory',
+      // to prevent automatic detection
+      appName: 'appName',
+      // to prevent automatic detection
+      appPackageName: 'somePackageName',
+      // to prevent automatic detection
+      appVersion: 'someAppVersion',
+    );
+
+    // act
+    final ParseInstallation installation =
+        await ParseInstallation.currentInstallation();
+
+    dynamic actualHasTimeZoneResult = installation.containsKey(keyTimeZone);
+
+    // assert
+    expect(actualHasTimeZoneResult, true);
+  });
+}