FirebasePresenceService class

Firebase RTDB-backed PresenceService.

Presence records are stored at presence/{channelId}/{userId}. An onDisconnect hook ensures the record is marked offline even when the client closes abnormally (app crash, network loss, etc.).

Inheritance

• Object
• PresenceService
• FirebasePresenceService

Constructors

FirebasePresenceService({FirebaseDatabase? database})

Creates a FirebasePresenceService.

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

connect({required String userId, required String channelId, Map<String, dynamic>? metadata, String? displayName}) → Future<void>

Marks userId as online in the given channel.

override

disconnect({required String userId, required String channelId}) → Future<void>

Marks userId as offline in the given channel.

override

getOnlineUsers({required String channelId}) → Future<List<PresenceRecord>>

Returns the current list of online users (one-time fetch).

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

toString() → String

A string representation of this object.

inherited

watchPresence({required String channelId}) → Stream<List<PresenceRecord>>

Emits the list of currently online users whenever it changes.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited