loadMessage method Null safety
- String messageId
Loads a message from the local database by message ID.
Param messageId
The message ID.
Return The message object specified by the message ID. Returns null if the message does not exist.
Throws A description of the exception. See {@link EMError}.
Implementation
Future<EMMessage?> loadMessage(String messageId) async {
Map req = {"msg_id": messageId};
Map<String, dynamic> result =
await EMMethodChannel.ChatManager.invokeMethod(
ChatMethodKeys.getMessage, req);
try {
EMError.hasErrorFromResult(result);
if (result.containsKey(ChatMethodKeys.getMessage)) {
return EMMessage.fromJson(result[ChatMethodKeys.getMessage]);
} else {
return null;
}
} on EMError catch (e) {
throw e;
}
}