update sms plugin

packages/flutter_sms/lib/src/flutter_sms_platform.dart

@@ -0,0 +1,89 @@
+import 'dart:async';
+import 'dart:io' show Platform;
+
+import 'package:flutter/foundation.dart';
+import 'package:flutter/services.dart';
+import 'package:plugin_platform_interface/plugin_platform_interface.dart';
+import 'package:url_launcher/url_launcher.dart';
+
+import 'user_agent/io.dart' if (dart.library.html) 'user_agent/web.dart';
+
+const MethodChannel _channel = MethodChannel('flutter_sms');
+
+class FlutterSmsPlatform extends PlatformInterface {
+  /// Constructs a FlutterSmsPlatform.
+  FlutterSmsPlatform() : super(token: _token);
+
+  static final Object _token = Object();
+
+  static FlutterSmsPlatform _instance = FlutterSmsPlatform();
+
+  /// The default instance of [FlutterSmsPlatform] to use.
+  ///
+  /// Defaults to [MethodChannelFlutterSmsPlatform].
+  static FlutterSmsPlatform get instance => _instance;
+
+  /// Platform-specific plugins should set this with their own platform-specific
+  /// class that extends [FlutterSmsPlatform] when they register themselves.
+  // TODO(amirh): Extract common platform interface logic.
+  // https://github.com/flutter/flutter/issues/43368
+  static set instance(FlutterSmsPlatform instance) {
+    PlatformInterface.verifyToken(instance, _token);
+    _instance = instance;
+  }
+
+  ///
+  ///
+  Future<String> sendSMS({
+    required String message,
+    required List<String> recipients,
+    bool sendDirect = false,
+  }) {
+    final mapData = <dynamic, dynamic>{};
+    mapData['message'] = message;
+    if (!kIsWeb && Platform.isIOS) {
+      mapData['recipients'] = recipients;
+      return _channel
+          .invokeMethod<String>('sendSMS', mapData)
+          .then((value) => value ?? 'Error sending sms');
+    } else {
+      String _phones = recipients.join(';');
+      mapData['recipients'] = _phones;
+      mapData['sendDirect'] = sendDirect;
+      return _channel
+          .invokeMethod<String>('sendSMS', mapData)
+          .then((value) => value ?? 'Error sending sms');
+    }
+  }
+
+  Future<bool> canSendSMS() {
+    return _channel
+        .invokeMethod<bool>('canSendSMS')
+        .then((value) => value ?? false);
+  }
+
+  Future<bool> launchSmsMulti(List<String> numbers, [String? body]) {
+    if (numbers.length == 1) {
+      return launchSms(numbers.first, body);
+    }
+    String _phones = numbers.join(';');
+    if (body != null) {
+      final _body = Uri.encodeComponent(body);
+      return launchUrl(
+          Uri.parse('sms:/open?addresses=$_phones${separator}body=$_body'));
+    }
+    return launchUrl(Uri.parse('sms:/open?addresses=$_phones'));
+  }
+
+  Future<bool> launchSms(String? number, [String? body]) {
+    // ignore: parameter_assignments
+    number ??= '';
+    if (body != null) {
+      final _body = Uri.encodeComponent(body);
+      return launchUrl(Uri.parse('sms:/$number${separator}body=$_body'));
+    }
+    return launchUrl(Uri.parse('sms:/$number'));
+  }
+
+  String get separator => isCupertino() ? '&' : '?';
+}

packages/flutter_sms/lib/src/user_agent/io.dart

@@ -0,0 +1,5 @@
+import 'dart:io';
+
+bool isCupertino() {
+  return Platform.isIOS || Platform.isMacOS;
+}

packages/flutter_sms/lib/src/user_agent/web.dart

@@ -0,0 +1,20 @@
+import 'package:web/web.dart' as web;
+
+bool isCupertino() {
+  final _devices = [
+    'iPad Simulator',
+    'iPhone Simulator',
+    'iPod Simulator',
+    'iPad',
+    'iPhone',
+    'iPod',
+    'Mac OS X',
+  ];
+  final String _agent = web.window.navigator.userAgent;
+  for (final device in _devices) {
+    if (_agent.contains(device)) {
+      return true;
+    }
+  }
+  return false;
+}