initialize method

@override Future<bool> initialize(String? defaultIcon, List<NotificationChannel> channels, { List<NotificationChannelGroup>? channelGroups, bool debug = false, })

INITIALIZING METHODS ********************************************* Initializes the plugin, creating a default icon and the initial channels. Only needs to be called at main.dart once. OBS: defaultIcon needs to be a Resource media type OBS 2: channels are updated if they already exists

Implementation

@override
Future<bool> initialize(
    String? defaultIcon, List<NotificationChannel> channels,
    {List<NotificationChannelGroup>? channelGroups,
    bool debug = false}) async {
  WidgetsFlutterBinding.ensureInitialized();

  methodChannel.setMethodCallHandler(_handleMethod);

  List<dynamic> serializedChannels = [];
  for (NotificationChannel channel in channels) {
    serializedChannels.add(channel.toMap());
  }

  List<dynamic> serializedChannelGroups = [];
  if (channelGroups != null) {
    for (NotificationChannelGroup channelGroup in channelGroups) {
      serializedChannelGroups.add(channelGroup.toMap());
    }
  }

  String? defaultIconPath;
  if (kIsWeb) {
    // For web release
  } else {
    if (!LocalAssertUtils.isNullOrEmptyOrInvalid(defaultIcon, String)) {
      // To set a icon on top of notification, is mandatory to user a native resource
      assert(LocalBitmapUtils().getMediaSource(defaultIcon!) ==
          MediaSource.Resource);
      defaultIconPath = defaultIcon;
    }
  }

  final CallbackHandle? dartCallbackReference =
      PluginUtilities.getCallbackHandle(dartIsolateMain);

  var result = await methodChannel.invokeMethod(CHANNEL_METHOD_INITIALIZE, {
    INITIALIZE_DEBUG_MODE: debug,
    INITIALIZE_DEFAULT_ICON: defaultIconPath,
    INITIALIZE_CHANNELS: serializedChannels,
    INITIALIZE_CHANNELS_GROUPS: serializedChannelGroups,
    BACKGROUND_HANDLE: dartCallbackReference!.toRawHandle()
  });

  LocalNotifications.localTimeZoneIdentifier = await methodChannel
      .invokeMethod(CHANNEL_METHOD_GET_LOCAL_TIMEZONE_IDENTIFIER);
  LocalNotifications.utcTimeZoneIdentifier = await methodChannel
      .invokeMethod(CHANNEL_METHOD_GET_UTC_TIMEZONE_IDENTIFIER);

  return result;
}