# Python Twitch API

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This is a full implementation of the Twitch Helix API, EventSub and Chat in python 3.7+.


## Installation

Install using pip:

```pip install twitchAPI```

## Documentation and Support

A full API documentation can be found [on readthedocs.org](https://pytwitchapi.readthedocs.io/en/stable/index.html).

For support please join the [Twitch API discord server](https://discord.gg/tu2Dmc7gpd)

## Usage

### Basic API calls

Setting up an Instance of the Twitch API and get your User ID:

```python
from twitchAPI.twitch import Twitch
from twitchAPI.helper import first
import asyncio

async def twitch_example():
    # initialize the twitch instance, this will by default also create a app authentication for you
    twitch = await Twitch('app_id', 'app_secret')
    # call the API for the data of your twitch user
    # this returns a async generator that can be used to iterate over all results
    # but we are just interested in the first result
    # using the first helper makes this easy.
    user = await first(twitch.get_users(logins='your_twitch_user'))
    # print the ID of your user or do whatever else you want with it
    print(user.id)

# run this example
asyncio.run(twitch_example())
```

### Authentication

The Twitch API knows 2 different authentications. App and User Authentication.
Which one you need (or if one at all) depends on what calls you want to use.

It's always good to get at least App authentication even for calls where you don't need it since the rate limits are way better for authenticated calls.

**Please read the docs for more details and examples on how to set and use Authentication!**

#### App Authentication

App authentication is super simple, just do the following:

```python
from twitchAPI.twitch import Twitch
twitch = await Twitch('my_app_id', 'my_app_secret')
```

### User Authentication

To get a user auth token, the user has to explicitly click "Authorize" on the twitch website. You can use various online services to generate a token or use my build in Authenticator.
For my Authenticator you have to add the following URL as a "OAuth Redirect URL": ```http://localhost:17563```
You can set that [here in your twitch dev dashboard](https://dev.twitch.tv/console).


```python
from twitchAPI.twitch import Twitch
from twitchAPI.oauth import UserAuthenticator
from twitchAPI.type import AuthScope

twitch = await Twitch('my_app_id', 'my_app_secret')

target_scope = [AuthScope.BITS_READ]
auth = UserAuthenticator(twitch, target_scope, force_verify=False)
# this will open your default browser and prompt you with the twitch verification website
token, refresh_token = await auth.authenticate()
# add User authentication
await twitch.set_user_authentication(token, target_scope, refresh_token)
```

You can reuse this token and use the refresh_token to renew it:

```python
from twitchAPI.oauth import refresh_access_token
new_token, new_refresh_token = await refresh_access_token('refresh_token', 'client_id', 'client_secret')
```

### AuthToken refresh callback

Optionally you can set a callback for both user access token refresh and app access token refresh.

```python
from twitchAPI.twitch import Twitch

async def user_refresh(token: str, refresh_token: str):
    print(f'my new user token is: {token}')

async def app_refresh(token: str):
    print(f'my new app token is: {token}')

twitch = await Twitch('my_app_id', 'my_app_secret')
twitch.app_auth_refresh_callback = app_refresh
twitch.user_auth_refresh_callback = user_refresh
```

## EventSub

EventSub lets you listen for events that happen on Twitch.

The EventSub client runs in its own thread, calling the given callback function whenever an event happens.

There are multiple EventSub transports available, used for different use cases.

See here for more info about EventSub in general and the different Transports, including code examples: [on readthedocs](https://pytwitchapi.readthedocs.io/en/stable/modules/twitchAPI.eventsub.html)


## Chat

A simple twitch chat bot.
Chat bots can join channels, listen to chat and reply to messages, commands, subscriptions and many more.

A more detailed documentation can be found [here on readthedocs](https://pytwitchapi.readthedocs.io/en/stable/modules/twitchAPI.chat.html)

### Example code for a simple bot

```python
from twitchAPI.twitch import Twitch
from twitchAPI.oauth import UserAuthenticator
from twitchAPI.type import AuthScope, ChatEvent
from twitchAPI.chat import Chat, EventData, ChatMessage, ChatSub, ChatCommand
import asyncio

APP_ID = 'my_app_id'
APP_SECRET = 'my_app_secret'
USER_SCOPE = [AuthScope.CHAT_READ, AuthScope.CHAT_EDIT]
TARGET_CHANNEL = 'teekeks42'


# this will be called when the event READY is triggered, which will be on bot start
async def on_ready(ready_event: EventData):
    print('Bot is ready for work, joining channels')
    # join our target channel, if you want to join multiple, either call join for each individually
    # or even better pass a list of channels as the argument
    await ready_event.chat.join_room(TARGET_CHANNEL)
    # you can do other bot initialization things in here


# this will be called whenever a message in a channel was send by either the bot OR another user
async def on_message(msg: ChatMessage):
    print(f'in {msg.room.name}, {msg.user.name} said: {msg.text}')


# this will be called whenever someone subscribes to a channel
async def on_sub(sub: ChatSub):
    print(f'New subscription in {sub.room.name}:\\n'
          f'  Type: {sub.sub_plan}\\n'
          f'  Message: {sub.sub_message}')


# this will be called whenever the !reply command is issued
async def test_command(cmd: ChatCommand):
    if len(cmd.parameter) == 0:
        await cmd.reply('you did not tell me what to reply with')
    else:
        await cmd.reply(f'{cmd.user.name}: {cmd.parameter}')


# this is where we set up the bot
async def run():
    # set up twitch api instance and add user authentication with some scopes
    twitch = await Twitch(APP_ID, APP_SECRET)
    auth = UserAuthenticator(twitch, USER_SCOPE)
    token, refresh_token = await auth.authenticate()
    await twitch.set_user_authentication(token, USER_SCOPE, refresh_token)

    # create chat instance
    chat = await Chat(twitch)

    # register the handlers for the events you want

    # listen to when the bot is done starting up and ready to join channels
    chat.register_event(ChatEvent.READY, on_ready)
    # listen to chat messages
    chat.register_event(ChatEvent.MESSAGE, on_message)
    # listen to channel subscriptions
    chat.register_event(ChatEvent.SUB, on_sub)
    # there are more events, you can view them all in this documentation

    # you can directly register commands and their handlers, this will register the !reply command
    chat.register_command('reply', test_command)


    # we are done with our setup, lets start this bot up!
    chat.start()

    # lets run till we press enter in the console
    try:
        input('press ENTER to stop\n')
    finally:
        # now we can close the chat bot and the twitch api client
        chat.stop()
        await twitch.close()


# lets run our setup
asyncio.run(run())
```
