| .. | ||
| commute_bot | ||
| converter | ||
| define_bot | ||
| encrypt_bot | ||
| followup | ||
| foursquare | ||
| giphy | ||
| git_hub_comment | ||
| github | ||
| github_issues | ||
| help | ||
| howdoi_bot | ||
| john | ||
| thesaurus | ||
| tictactoe-bot | ||
| virtual_fs | ||
| wikipedia | ||
| xkcd | ||
| yoda_bot | ||
| __init__.py | ||
| readme.md | ||
Contrib Bots:
This is the documentation for an experimental new system for writing bots that react to messages.
This directory contains library code for running Zulip bots that react to messages sent by users.
This document explains how to run the code, and it also talks about the architecture for creating bots.
Design Goals
The goal is to have a common framework for hosting a bot that reacts to messages in any of the following settings:
-
Run as a long-running process using
call_on_each_event. -
Run via a simple web service that can be deployed to PAAS providers and handles outgoing webhook requests from Zulip.
-
Embedded into the Zulip server (so that no hosting is required), which would be done for high quality, reusable bots; we would have a nice "bot store" sort of UI for browsing and activating them.
-
Run locally by our technically inclined users for bots that require account specific authentication, for example: a gmail bot that lets one send emails directly through Zulip.
Running Bots
Here is an example of running the "follow-up" bot from inside a Zulip repo (and in your remote instance):
cd ~/zulip/contrib_bots
./run.py bots/followup/followup.py --config-file ~/.zuliprc-prod
Once the bot code starts running, you will see a
message explaining how to use the bot, as well as
some log messages. You can use the --quiet option
to suppress these messages.
The bot code will run continuously until you end the program with control-C (or otherwise).
Zulip Configuration
For this document we assume you have some prior experience
with using the Zulip API, but here is a quick review of
what a .zuliprc files looks like. You can connect to the
API as your own human user, or you can go into the Zulip settings
page to create a user-owned bot.
[api]
email=someuser@example.com
key=<your api key>
site=https://zulip.somewhere.com
When you run your bot, make sure to point it to the correct location
of your .zuliprc.
Third Party Configuration
If your bot interacts with a non-Zulip service, you may have to configure keys or usernames or URLs or similar information to hit the other service.
Do NOT put third party configuration information in your
.zuliprc file. Do not put third party configuration
information anywhere in your Zulip directory. Instead,
create a separate configuration file for the third party's
configuration in your home directory.
Any bots that require this will have instructions on exactly how to create or access this information.
Python Dependencies
If your module requires Python modules that are not either part of the standard Python library or the Zulip API distribution, we ask that you put a comment at the top of your bot explaining how to install the dependencies/modules.
Right now we don't support any kind of automatic build environment for bots, so it's currently up to the users of the bots to manage their dependencies. This may change in the future.
Architecture
In order to make bot development easy, we separate out boilerplate code (loading up the Client API, etc.) from bot-specific code (actions of the bot/what the bot does).
All of the boilerplate code lives in ../run.py. The
runner code does things like find where it can import
the Zulip API, instantiate a client with correct
credentials, set up the logging level, find the
library code for the specific bot, etc.
Then, for bot-specific logic, you will find .py files
in the lib directory (i.e. the same directory as the
document you are reading now).
Each bot library simply needs to do the following:
- Define a class that supports the methods
usage,triage_message, andhandle_message. - Set
handler_classto be the name of that class.
(We make this a two-step process to reduce code repetition and to add abstraction.)
Portability
Creating a handler class for each bot allows your bot
code to be more portable. For example, if you want to
use your bot code in some other kind of bot platform, then
if all of your bots conform to the handler_class protocol,
you can write simple adapter code to use them elsewhere.
Another future direction to consider is that Zulip will eventually support running certain types of bots on the server side, to essentially implement post-send hooks and things of those nature.
Conforming to the handler_class protocol will make
it easier for Zulip admins to integrate custom bots.
In particular, run.py already passes in instances
of a restricted variant of the Client class to your
library code, which helps you ensure that your bot
does only things that would be acceptable for running
in a server-side environment.
Other approaches
If you are not interested in running your bots on the server, then you can still use the full Zulip API and run them locally. The hope, though, is that this architecture will make writing simple bots a quick/easy process.