# Official Flutter SDK for [Stream Chat](https://getstream.io/chat/)

<p align="center">
  <a href="https://getstream.io/tutorials/ios-chat/"><img src="https://i.imgur.com/L4Mj8S2.png" alt="Flutter Chat" width="60%" /></a>
</p>

> The official Flutter components for Stream Chat, a service for
> building chat applications.

[![Pub](https://img.shields.io/pub/v/stream_chat_flutter.svg)](https://pub.dartlang.org/packages/stream_chat_flutter)
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<img align="right" src="https://getstream.imgix.net/images/ios-chat-tutorial/iphone_chat_art@1x.png?auto=format,enhance" width="50%" />

**Quick Links**

- [Register](https://getstream.io/chat/trial/) to get an API key for Stream Chat
- [Flutter Chat Tutorial](https://getstream.io/chat/flutter/tutorial/) 
- [Chat UI Kit](https://getstream.io/chat/ui-kit/)

## Flutter Chat Tutorial

The best place to start is the [Flutter Chat Tutorial](https://getstream.io/chat/flutter/tutorial/).
It teaches you how to use this SDK and also shows how to make frequently required changes.

## Example App

This repo includes a fully functional example app with setup instructions.
The example is available under the [example](https://github.com/GetStream/stream-chat-flutter/tree/master/example) folder.

## Add dependency

```yaml
dependencies:
 stream_chat_flutter: ^0.2.1
```

You should then run `flutter packages get`

### Android

All set ✅

### iOS

The library uses [flutter file picker plugin](https://github.com/miguelpruivo/flutter_file_picker) to pick
files from the os.
Follow [this wiki](https://github.com/miguelpruivo/flutter_file_picker/wiki/Setup#ios) to fulfill iOS requirements.

We also use [video_player](https://pub.dev/packages/video_player) to reproduce videos. Follow [this guide](https://pub.dev/packages/video_player#installation) to fulfill the requirements.

To pick images from the camera, we use the [image_picker](https://pub.dev/packages/image_picker) plugin.
Follow [these instructions](https://pub.dev/packages/image_picker#ios) to check the requirements.

## Docs

### Business logic components

We provide 3 Widgets dedicated to business logic and state management:

- [StreamChat](https://pub.dev/documentation/stream_chat_flutter/latest/stream_chat_flutter/StreamChat-class.html)
- [StreamChannel](https://pub.dev/documentation/stream_chat_flutter/latest/stream_chat_flutter/StreamChannel-class.html)
- [ChannelsBloc](https://pub.dev/documentation/stream_chat_flutter/0.2.0-alpha+2/stream_chat_flutter/ChannelsBloc-class.html)

### UI Components

These are the available Widgets that you can use to build your application UI.
Every widget uses the `StreamChat` or `StreamChannel` widgets to manage the state and communicate with Stream services.

- [ChannelHeader](https://pub.dev/documentation/stream_chat_flutter/latest/stream_chat_flutter/ChannelHeader-class.html)
- [ChannelImage](https://pub.dev/documentation/stream_chat_flutter/latest/stream_chat_flutter/ChannelImage-class.html)
- [ChannelListView](https://pub.dev/documentation/stream_chat_flutter/latest/stream_chat_flutter/ChannelListView-class.html)
- [ChannelName](https://pub.dev/documentation/stream_chat_flutter/latest/stream_chat_flutter/ChannelName-class.html)
- [ChannelPreview](https://pub.dev/documentation/stream_chat_flutter/latest/stream_chat_flutter/ChannelPreview-class.html)
- [MessageInput](https://pub.dev/documentation/stream_chat_flutter/latest/stream_chat_flutter/MessageInput-class.html)
- [MessageListView](https://pub.dev/documentation/stream_chat_flutter/latest/stream_chat_flutter/MessageListView-class.html)
- [MessageWidget](https://pub.dev/documentation/stream_chat_flutter/latest/stream_chat_flutter/MessageWidget-class.html)
- [StreamChatTheme](https://pub.dev/documentation/stream_chat_flutter/latest/stream_chat_flutter/StreamChatTheme-class.html)
- [ThreadHeader](https://pub.dev/documentation/stream_chat_flutter/latest/stream_chat_flutter/ThreadHeader-class.html)
- ...

### Customizing styles

The Flutter SDK comes with a fully designed set of widgets that you can customize to fit with your application style and typography.
Changing the theme of Chat widgets works in a very similar way that `MaterialApp` and `Theme` do.

Out of the box, all chat widgets use their default styling, and there are two ways to change the styling:

  1. Initialize the `StreamChatTheme` from your existing `MaterialApp` style
  ```dart
  class MyApp extends StatelessWidget {
    final Client client;

    MyApp(this.client);

    @override
    Widget build(BuildContext context) {
      final theme = ThemeData(
        primarySwatch: Colors.green,
      );

      return MaterialApp(
        theme: theme,
        builder: (context, child) => StreamChat(
         child: child,
         client: client,
         streamChatThemeData: StreamChatThemeData.fromTheme(theme),
        ),
        home: ChannelListPage(),
        );
    }
  }
  ```

  2. Construct a custom theme and provide all the customizations needed
  ```dart
  class MyApp extends StatelessWidget {
    final Client client;

    MyApp(this.client);

    @override
    Widget build(BuildContext context) {
      final theme = ThemeData(
        primarySwatch: Colors.green,
      );

      return MaterialApp(
        theme: theme,
        builder: (context, child) => StreamChat(
         child: child,
         client: client,
         streamChatThemeData: StreamChatThemeData.fromTheme(theme).copyWith(
            ownMessageTheme: MessageTheme(
            messageBackgroundColor: Colors.black,
            messageText: TextStyle(
              color: Colors.white,
            ),
            avatarTheme: AvatarTheme(
              borderRadius: BorderRadius.circular(8),
            ),
            ),
         ),
        ),
        home: ChannelListPage(),
        );
    }
  }
  ```
  
### Offline storage 

By default the library saves information about channels and messages in a SQLite DB.

Set the property `persistenceEnabled` to false if you don't want to use the offline storage.

## Contributing

We welcome code changes that improve this library or fix a problem,
please make sure to follow all best practices and add tests if applicable before submitting a Pull Request on Github.
We are pleased to merge your code into the official repository.
Make sure to sign our [Contributor License Agreement (CLA)](https://docs.google.com/forms/d/e/1FAIpQLScFKsKkAJI7mhCr7K9rEIOpqIDThrWxuvxnwUq2XkHyG154vQ/viewform) first.
See our license file for more details.
