stream_chat library Null safety

Classes

AcceptInviteResponse
Model response for Channel.acceptInvite api call
Action
The class that contains the information about an action
AddMembersResponse
Model response for Channel.addMembers api call
AsyncCache<T>
Runs asynchronous functions and caches the result for a period of time.
AsyncMemoizer<T>
A class for running an asynchronous function exactly once and caching its result.
Attachment
The class that contains the information about an attachment
AttachmentFile
The class that contains the information about an attachment file
AttachmentFileUploader
Class responsible for uploading images and files to a given channel
BaseOptions
The common config for the Dio instance. dio.options is a instance of BaseOptions
CancelableCompleter<T>
A completer for a CancelableOperation.
CancelableOperation<T>
An asynchronous operation that can be cancelled.
Channel
Class that manages a specific channel.
ChannelClientState
The class that handles the state of the channel listening to the events.
ChannelConfig
The class that contains the information about the configuration of a channel
ChannelModel
The class that contains the information about a channel
ChannelState
The class that contains the information about a channel
ChannelStateResponse
Model response for Channel.query api call
ChatPersistenceClient
A simple client used for persisting chat data locally.
ChunkedStreamReader<T>
Utility class for reading elements from a chunked stream.
ClientState
The class that handles the state of the channel listening to the events
Command
The class that contains the information about a command
ConnectGuestUserResponse
Model response for StreamChatClient.connectGuestUser api call
Debounce
Creates a debounced function that delays invoking func until after wait milliseconds have elapsed since the last time the debounced function was invoked. The debounced function comes with a Debounce.cancel method to cancel delayed func invocations and a Debounce.flush method to immediately invoke them. Provide leading and/or trailing to indicate whether func should be invoked on the leading and/or trailing edge of the wait interval. The func is invoked with the last arguments provided to the call function. Subsequent calls to the debounced function return the result of the last func invocation.
DelegatingEventSink<T>
Simple delegating wrapper around an EventSink.
DelegatingFuture<T>
A wrapper that forwards calls to a Future.
DelegatingSink<T>
Simple delegating wrapper around a Sink.
DelegatingStream<T>
Simple delegating wrapper around a Stream.
DelegatingStreamConsumer<T>
Simple delegating wrapper around a StreamConsumer.
DelegatingStreamSink<T>
Simple delegating wrapper around a StreamSink.
DelegatingStreamSubscription<T>
Simple delegating wrapper around a StreamSubscription.
Device
The class that contains the information about a device
EmptyResponse
Model response for empty responses
ErrorResponse
Model response for StreamChatNetworkError data
ErrorResult
A result representing a thrown error.
Event
The class that contains the information about an event
EventChannel
The channel embedded in the event object
EventSinkBase<T>
An abstract class that implements EventSink in terms of onData, onError, and onClose methods.
EventType
This class defines some basic event types
Failed
Filter
Stream supports a limited set of filters for querying channels, users and members. The example below shows how to filter for channels of type messaging where the current user is a member
FutureGroup<T>
A collection of futures waits until all added Futures complete.
GetMessageResponse
Model response for StreamChatClient.getMessage api call
GetMessagesByIdResponse
Model response for Channel.getMessagesById api call
InProgress
InviteMembersResponse
Model response for Channel.inviteMembers api call
IOSinkBase
An abstract class that implements dart:io's IOSink's API in terms of onData, onError, onClose, and onFlush methods.
LazyStream<T>
A Stream wrapper that forwards to another Stream that's initialized lazily.
Level
Levels to control logging output. Logging can be enabled to include all levels above certain Level. Levels are ordered using an integer value Level.value. The predefined Level constants below are sorted as follows (in descending order): Level.SHOUT, Level.SEVERE, Level.WARNING, Level.INFO, Level.CONFIG, Level.FINE, Level.FINER, Level.FINEST, and Level.ALL.
ListDevicesResponse
Model response for StreamChatClient.getDevices api call
Logger
Use a Logger to log debug messages.
Member
The class that contains the information about the user membership in a channel
Message
The class that contains the information about a message
MultipartFile
A file to be uploaded as part of a MultipartRequest. This doesn't need to correspond to a physical file.
Mute
The class that contains the information about a muted user
NullStreamSink<T>
A StreamSink that discards all events.
OGAttachmentResponse
Model response for Client.enrichUrl api call.
Options
Every request can pass an Options object which will be merged with Dio.options
OwnUser
The class that defines the own user model.
PaginationParams
Pagination options.
PartialUpdateChannelResponse
Model response for Channel.updatePartial api call
PartialUpdateUserRequest
Request model for the client.partialUpdateUser api call.
Preparing
QueryBannedUsersResponse
Model response for StreamChatClient.queryBannedUsers api call
QueryChannelsResponse
Model response for StreamChatClient.queryChannels api call
QueryMembersResponse
Model response for StreamChatClient.queryChannels api call
QueryReactionsResponse
Model response for channel.getReactions api call
QueryRepliesResponse
Model response for Channel.getReplies api call
QueryUsersResponse
Model response for StreamChatClient.queryUsers api call
Reaction
The class that defines a reaction
Read
The class that defines a read event
RejectInviteResponse
Model response for Channel.rejectInvite api call
RemoveMembersResponse
Model response for Channel.removeMembers api call
RequestOptions
RestartableTimer
A non-periodic timer that can be restarted any number of times.
Result<T>
The result of a computation.
ResultFuture<T>
A Future wrapper that provides synchronous access to the result of the wrapped Future once it's completed.
SearchMessagesResponse
Model response for StreamChatClient.search api call
SendActionResponse
Model response for Channel.sendAction api call
SendFileResponse
Model response for Channel.sendFile api call
SendImageResponse
Model response for Channel.sendImage api call
SendMessageResponse
Model response for Channel.sendMessage api call
SendReactionResponse
Model response for Channel.sendReaction api call
SingleSubscriptionTransformer<S, T>
A transformer that converts a broadcast stream into a single-subscription stream.
SortOption<T>
Sorting options
StreamChatClient
The official Dart client for Stream Chat, a service for building chat applications. This library can be used on any Dart project and on both mobile and web apps with Flutter.
StreamCloser<T>
A StreamTransformer that allows the caller to forcibly close the transformed Stream.
StreamCompleter<T>
A single-subscription stream where the contents are provided later.
StreamGroup<T>
A collection of streams whose events are unified and sent through a central stream.
StreamQueue<T>
An asynchronous pull-based interface for accessing stream events.
StreamQueueTransaction<T>
A transaction on a StreamQueue, created by StreamQueue.startTransaction.
StreamSinkBase<T>
An abstract class that implements StreamSink in terms of onData, onError, and onClose methods.
StreamSinkCompleter<T>
A sink where the destination is provided later.
StreamSinkTransformer<S, T>
A StreamSinkTransformer transforms the events being passed to a sink.
StreamSplitter<T>
A class that splits a single source stream into an arbitrary number of (single-subscription) streams (called "branch") that emit the same events.
StreamZip<T>
A stream that combines the values of other streams.
SubscriptionStream<T>
A Stream adapter for a StreamSubscription.
Success
SyncResponse
Model response for StreamChatClient.sync api call
Throttle
Creates a throttled function that only invokes func at most once per every wait milliseconds. The throttled function comes with a Throttle.cancel method to cancel delayed func invocations and a Throttle.flush method to immediately invoke them. Provide leading and/or trailing to indicate whether func should be invoked on the leading and/or trailing edge of the wait timeout. The func is invoked with the last arguments provided to the throttled function. Subsequent calls to the throttled function return the result of the last func invocation.
TranslateMessageResponse
Model response for StreamChatClient.queryChannels api call
UpdateChannelResponse
Model response for Channel.update api call
UpdateMessageResponse
Model response for StreamChatClient.updateMessage api call
UpdateUsersResponse
Model response for StreamChatClient.updateUser api call
UploadState
Union class to hold various UploadState of a attachment.
User
Class that defines a Stream Chat User.
ValueResult<T>
A result representing a returned value.

Mixins

OptionsMixin

Extensions

ChatErrorCodeX
ChunkedStreamReaderByteStreamExt
Extensions for using ChunkedStreamReader with byte-streams.
IterableX
Useful extension functions for Iterable
LocationX
MapX
Useful extension functions for Map
RateLimit
Useful rate limiter extensions for Function class.
StreamExtensions
Utility extensions on Stream.
StreamSinkExtensions
Extensions on StreamSink to make stream transformations more fluent.
StringX
Useful extension functions for String
UploadStateX
Helper extension for UploadState

Functions

chatErrorCodeFromCode(int code) → ChatErrorCode?
collectBytes(Stream<List<int>> source) → Future<Uint8List>
Collects an asynchronous sequence of byte lists into a single list of bytes.
collectBytesCancelable(Stream<List<int>> source) → CancelableOperation<Uint8List>
Collects an asynchronous sequence of byte lists into a single list of bytes.
debounce(Function func, Duration wait, {bool leading = false, bool trailing = true, Duration? maxWait}) → Debounce
TopLevel lambda to create Debounce functions.
subscriptionTransformer<T>({Future handleCancel(StreamSubscription<T>)?, void handlePause(StreamSubscription<T>)?, void handleResume(StreamSubscription<T>)?}) → StreamTransformer<T, T>
Creates a StreamTransformer that modifies the behavior of subscriptions to a stream.
throttle(Function func, Duration wait, {bool leading = true, bool trailing = true}) → Throttle
TopLevel lambda to create Throttle functions.
typedStreamTransformer<S, T>(StreamTransformer transformer) → StreamTransformer<S, T>
Creates a wrapper that coerces the type of transformer.
@Deprecated('Use Stream.cast after binding a transformer instead')

Enums

ChatErrorCode
Complete list of errors that are returned by the API together with the description and API code.
ConnectionStatus
Used to notify the WS connection status
DioErrorType
ListFormat
ListFormat specifies the array format (a single parameter with multiple parameter or multiple parameters with the same name) and the separator for array items.
Location
MessageSendingStatus
Enum defining the status of a sending message
PushProvider
Provider used to send push notifications.
ResponseType
ResponseType indicates which transformation should be automatically applied to the response data by Dio.

Typedefs

LogHandlerFunction = void Function(LogRecord record)
Handler function used for logging records. Function requires a single LogRecord as the only parameter.
ProgressCallback = void Function(int count, int total)
Callback to listen the progress for sending/receiving data.
RequestEncoder = List<int> Function(String request, RequestOptions options)
ResponseDecoder = String Function(List<int> responseBytes, RequestOptions options, ResponseBody responseBody)
ValidateStatus = bool Function(int? status)

Exceptions / Errors

DioError
DioError describes the error info when request failed.
StreamChatError
StreamChatNetworkError
StreamWebSocketError