# Slack <--> Zulip bridge

This is a bridge between Slack and Zulip.

## Usage

### 1. Zulip endpoint
1. Create a generic Zulip bot, with a full name like `Slack Bot`.
2. (Important) Subscribe the bot user to the Zulip stream you'd like to bridge your Slack
   channel into.
3. In the `zulip` section of the configuration file, enter the bot's `zuliprc`
   details (`email`, `api_key`, and `site`).
4. In the same section, also enter the Zulip `stream` and `topic`.

### 2. Slack endpoint
1. Make sure Websocket isn't blocked in the computer where you run this bridge.
   Test it at https://www.websocket.org/echo.html.
2. Go to https://api.slack.com/apps?new_classic_app=1 and create a new classic app (note: must be a classic app). Choose a bot name that will be put into bridge_with_slack_config.py, e.g. "zulip_mirror". Make sure to install the app to the workspace. When successful, you should see a token that starts with "xoxb-..." (there is also a token that starts with "xoxp-...", we need the "xoxb-..." one).
3. (Important) Make sure the bot is subscribed to the channel. You can do this by typing e.g. `/invite @zulip_mirror` in the relevant channel.
4. In the `slack` section of the configuration file, enter the bot name (e.g. "zulip_mirror") and token, and the channel ID (note: must be ID, not name).

### Running the bridge

Run `python3 run-slack-bridge`