Flutter client of MqChat, a protocol built over MQTT for chatting purposes.
The Broker should install HiveMQ Chat-Extension first.
Features
Use MQTT as a chat protocol, to create a modern chat application that supports all needed features. This is a flutter client of MqChat.
- Login
- Send/receive messages (text, image, vide, location, document, contact messages)
- Send Files
- Typing indicators
- Presence
- Group Chat
- Private Chat invitation
Getting started
Install the package flutter-mqchat:
flutter pub add flutter-mqchat
Usage
A full and rich example can be found in /example folder.
1. Login
User login using an existing account:
bool connected = await ChatApp.instance()!.clientHandler.connect(
host: "broker.url.com",
username: "[email protected]",
password: "user_pass");After a successful login, the mqtt client will receive updates. The first updates to be received are profile details, rooms that users is member of, ongoing invitations and messages (if message archiving is supported by the broker).
2. Listen to my profile changes
ChatApp.instance()!.archiveHandler.getUser().listen((user) {
//insert/update user to database
});3. Listen to rooms
Whenever the logged in user is added to a room (or room details changed), the room details will be added to the Conversations stream.
ChatApp.instance()!.archiveHandler.getAllConversations().listen((rooms) {
//insert/update rooms on the Database
});4. Listen to new messages
ChatApp.instance()!.messageReader.getChatMessages().listen((message) {
var dbMessage = message.toDbMessage();
// insert the message to the database
// send chatmarker if the message is not mine
});5. Listen to ChatMarkers
ChatApp.instance()!
.messageReader
.getChatMarkerMessages()
.listen((markerMessage) {
String messageId = markerMessage.referenceId;
if (markerMessage.status == ChatMarker.displayed) {
//update the database record
} else if (markerMessage.status == ChatMarker.delivered) {
//update the database record
}
});6. Listen to new chat invitations
ChatApp.instance()!
.invitationHandler
.newInvitationsStream()
.listen((invitation) {
if(invitation.type == MessageType.EventInvitationRequest) {
//new invitation request
//insert invitation record to the database, notify the user
}
if(invitation.type == MessageType.EventInvitationResponseAccept || invitation.type == MessageType.EventInvitationResponseReject) {
//responded to invitation, update the local record and wait the server to sync the new contact (if accepted).
//Do not insert a room, the user will receive a new room details triggered by getAllConversations()
}
});7. Listen to invitatioin updates
We use this to listen to the invitations that the user has sent. It could be:
- Info: When receive an affirmation that the invitation is sent
- Error: When there is an error (like the user is not found)
ChatApp.instance()!
.invitationHandler
.invitationUpdatesStream()
.listen((invitation) {
if (invitation.invitationMessageType == InvitationMessageType.INFO) {
//update the invitation record to be confirmed
}
else if (invitation.invitationMessageType == InvitationMessageType.ERROR) {
//notify the user, and delete the record in inserted
}
});8. Send a text Message
ChatMessage newMessage = ChatMessage(
id: "generated_random_id",
type: MessageType.ChatText,
text: "Hello there",
roomId: "[room_id]",
fromId: "[my_id]",//optional
sendTime: DateTime.now().millisecondsSinceEpoch,
fromName: "[my_name]");8.1 Send the message as regular message
ChatApp.instance()!
.messageSender
.sendChatMessage(newMessage, "[room_id]");8.2 Send the message as a reply to another message
ChatMessage replyToMessage = ...; //the message to reply to
ChatApp.instance()!
.messageSender
.replyToMessage(replyToMessage, newMessage, widget.contactChat.roomId);9. Send File Message
ChatApp.instance()!.messageSender.sendFileChatMessage(
type: MessageType.ChatImage,//for example
fileLocalPath: path,
room: "[room_id]");10. Send typing indicator
ChatApp.instance()!
.eventsSender
.sendIsTyping(true, "[room_id]");11. Listen to typing indicator
ChatApp.instance()!.messageReader.getTypingMessages().listen((event) {
//using event.roomId and event.isTyping and event.fromId, update the ui state
});12. Send new chat invitation
ChatApp.instance()!
.eventsSender
.sendInvitation("[invitee_username]", "[invitation_random_id]");Additional information
TODO: Tell users more about the package: where to find more information, how to contribute to the package, how to file issues, what response they can expect from the package authors, and more.