Signal Bot Framework

Python package to build your own Signal bots. To run the the bot you need to start the signal-cli-rest-api service and link your device with it. Please refer to that project for more details. The API server must run in json-rpc mode.

Getting Started

Please see https://github.com/filipre/signalbot-example for an example how to use the package and how to build a simple bot.

Classes and API

Documentation work in progress. Feel free to open an issue for questions.

The package provides methods to easily listen for incoming messages and responding or reacting on them. It also provides a class to develop new commands which then can be registered within the bot.

Signalbot

• bot.listen(group_id, internal_id): Listen for messages in a group chat. group_id must be prefixed with group.
• bot.listen(phone_number): Listen for messages in a user chat.
• bot.register(command): Register a new command
• bot.start(): Start the bot
• bot.send(receiver, text, listen=False): Send a new message
• bot.react(message, emoji): React to a message
• bot.start_typing(receiver): Start typing
• bot.stop_typing(receiver): Stop typing
• bot.scheduler: APScheduler > AsyncIOScheduler, see here
• bot.storage: In-memory or Redis stroage, see storage.py

Command

To implement your own commands, you need to inherent Command and overwrite following methods:

• setup(self): Start any task that requires to send messages already, optional
• describe(self): String to describe your command, optional
• handle(self, c: Context): Handle an incoming message. By default, any command will read any incoming message. Context can be used to easily reply (c.send(text)), react (c.react(emoji)) and to type in a group (c.start_typing() and c.stop_typing()). You can use the @triggered decorator to listen for specific commands or you can inspect c.message.text.

Unit Testing

In many cases, we can mock receiving and sending messages to speed up development time. To do so, you can use signalbot.utils.ChatTestCase which sets up a "skeleton" bot. Then, you can send messages using the @chat decorator in signalbot.utils like this:

class PingChatTest(ChatTestCase):
    def setUp(self):
        # initialize self.singal_bot
        super().setUp()
        # all that is left to do is to register the commands that you want to test
        self.signal_bot.register(PingCommand())

    @chat("ping", "ping")
    async def test_ping(self, query, replies, reactions):
        self.assertEqual(replies.call_count, 2)
        for recipient, message in replies.results():
            self.assertEqual(recipient, ChatTestCase.group_secret)
            self.assertEqual(message, "pong")

In signalbot.utils, check out ReceiveMessagesMock, SendMessagesMock and ReactMessageMock to learn more about their API.

Troubleshooting

• Check that you linked your account successfully
• Is the API server running in json-rpc mode?
• Can you receive messages using wscat (websockets) and send messages using curl (http)?
• Do you see incoming messages in the API logs?
• Do you see the "raw" messages in the bot's logs?
• Do you see "consumers" picking up jobs and handling incoming messages?
• Do you see the response in the bot's logs?

Local development and package

Section work in progress. Feel free to open an issue for questions.

poetry install
poetry run pre-commit install

Other Projects

There are a few other related projects similar to this one. You may want to check them out and see if it fits your needs.

Project	Description	Language
https://github.com/lwesterhof/semaphore	Bot Framework	Python
https://github.com/signalapp/libsignal-service-java	Signal Library	Java
https://github.com/AsamK/signal-cli	A CLI and D-Bus interface for Signal	Java
https://github.com/bbernhard/signal-cli-rest-api	REST API Wrapper for Signal CLI
https://github.com/aaronetz/signal-bot	Bot Framework	Java
https://github.com/signal-bot/signal-bot	Bot Framework	Python