Participants
View as MarkdownA participant represents a user in a conversation. To add a user to a conversation you can create a participant, and you can delete a participant to kick them. You can track the participants of a conversation in real-time using ConversationRef.subscribeParticipants.
References a given user's participation in a conversation.
Used in all Data API operations affecting that participant, such as joining/leaving a conversation, or setting their access. Created via ConversationRef.participant.
| createIfNotExists | Adds the user as a participant, or does nothing if they are already a participant. |
| delete | Removes the user as a participant, or does nothing if they are already not a participant. |
| deleteFields | Deletes properties of this participant. |
| edit | Edits properties of a pre-existing participant. If the user is not already a participant in the conversation, the function will throw. |
| get | Fetches a snapshot of the participant. |
| set | Sets properties of this participant. If the user is not already a participant in the conversation, they will be added. |
The ID of the conversation the user is participating in.
Immutable: if you want to reference the user in a different conversation, get a new ParticipantRef instead.
The ID of the user who is participating.
Immutable: if you want to reference a different participant, get a new ParticipantRef instead.
Future<void> participantRef.createIfNotExists({access, notify})
Adds the user as a participant, or does nothing if they are already a participant.
If the participant already exists, this operation is still considered successful.
The promise will reject if client-side conversation syncing is disabled and the user is not already a participant.
Parameters
The level of access the participant should have in the conversation. Default = READ_WRITE access.
When the participant should be notified about new messages in this conversation. Default = TRUE.
FALSE means no notifications, TRUE means notifications for all messages, and MENTIONS_ONLY means that the user will only be notified when they are mentioned with an @.
Returns
Future<void> participantRef.delete()
Removes the user as a participant, or does nothing if they are already not a participant.
Deleting a nonexistent participant is treated as success.
This function will throw if client-side conversation syncing is disabled.
Returns
Future<void> participantRef.edit({access, notify})
Edits properties of a pre-existing participant. If the user is not already a participant in the conversation, the function will throw.
Properties that are null will not be changed. To clear / reset a property to the default, call ParticipantRef.deleteFields instead.
When client-side conversation syncing is disabled, you must already be a participant and you cannot set anything except the notify property. Everything else requires client-side conversation syncing to be enabled, and will cause the function to throw.
Parameters
The level of access the participant should have in the conversation. Default = READ_WRITE access.
When the participant should be notified about new messages in this conversation. Default = TRUE.
FALSE means no notifications, TRUE means notifications for all messages, and MENTIONS_ONLY means that the user will only be notified when they are mentioned with an @.
Returns
Future<ParticipantSnapshot?> participantRef.get()
Fetches a snapshot of the participant.
This contains all of the participant's public information.
Returns
A snapshot of the participant's attributes, or null if the user is not a participant. The promise will reject if you are not a participant and try to read information about someone else.
Future<void> participantRef.set({access, notify})
Sets properties of this participant. If the user is not already a participant in the conversation, they will be added.
Properties that are null will not be changed. To clear / reset a property to the default, call ParticipantRef.deleteFields instead.
When client-side conversation syncing is disabled, you must already be a participant and you cannot set anything except the notify property. Everything else requires client-side conversation syncing to be enabled, and will cause the function to throw.
Parameters
The level of access the participant should have in the conversation. Default = READ_WRITE access.
When the participant should be notified about new messages in this conversation. Default = TRUE.
FALSE means no notifications, TRUE means notifications for all messages, and MENTIONS_ONLY means that the user will only be notified when they are mentioned with an @.
Returns
A snapshot of a participant's attributes at a given moment in time.
The level of access this participant has in the conversation.
The date that this user joined the conversation, as a unix timestamp in milliseconds.
When the participant will be notified about new messages in this conversation.
FALSE means no notifications, TRUE means notifications for all messages, and MENTIONS_ONLY means that the user will only be notified when they are mentioned with an @.
The user who this Participant Snapshot is referring to
Map<String, dynamic> participantSnapshot.toJson()
Returns
A subscription to the participants in a specific conversation.
Get a ParticipantSubscription by calling ConversationRef.subscribeParticipants
The subscription is 'windowed'. It includes everyone who joined since a certain point in time. By default, you subscribe to the 10 most recent participants, and any participants who joined after you subscribe.
You can expand this window by calling ParticipantSubscription.loadMore, which extends the window further into the past. Do not call .loadMore in a loop until you have loaded all participants, unless you know that the maximum number of participants is small (under 100).
Remember to .unsubscribe the subscription once you are done with it.
| loadMore | Expand the window to include older participants |
| unsubscribe | Unsubscribe from this resource and stop receiving updates. |
Resolves when the subscription starts receiving updates from the server.
Wait for this promise if you want to perform some action as soon as the subscription is active.
The promise rejects if the subscription is terminated before it connects.
Resolves when the subscription permanently stops receiving updates from the server.
This is either because you unsubscribed or because the subscription encountered an unrecoverable error.
Future<void> participantSubscription.loadMore([count])
Expand the window to include older participants
Calling loadMore multiple times in parallel will still only load one page of participants.
Avoid calling .loadMore in a loop until you have loaded all participants. If you do need to call loadMore in a loop, make sure you set a small upper bound (e.g. 100) on the number of participants, where the loop will exit.
Parameters
The number of additional participants to load. Must be between 1 and 50. Default 10.
Returns
Future<void> participantSubscription.unsubscribe()
Unsubscribe from this resource and stop receiving updates.
If the subscription is already in the or , this is a no-op.