Isaac - the smallish DSL for writing IRC bots
Features
-
Wraps parsing of incoming messages and raw IRC commands in simple constructs.
-
Hides all the ugly regular expressions of matching IRC commands. Leaves only the essentials for you to match.
-
Takes care of dull stuff such as replying to PING-messages and avoiding excess flood.
Getting started
An Isaac-bot needs a few basics:
require 'isaac'
configure do |c|
c.nick = "AwesomeBot"
c.server = "irc.freenode.net"
c.port = 6667
# if SSL is required set this to true
c.use_ssl = false
end
That’s it. Run ruby bot.rb
and it will connect to the specified server.
Connecting
After the bot has connected to the IRC server you might want to join some channels:
on :connect do
join "#awesome_channel", "#WesternBar"
end
Responding to messages
Joining a channel and sitting idle is not much fun. Let’s repeat everything being said in these channels:
on :channel do
msg channel,
end
Notice the channel
and message
variables. Additionally nick
and match
is available for channel-events. nick
being the sender of the message, match
being an array of captures from the regular expression:
on :channel, /^quote this: (.*)/ do
msg channel, "Quote: '#{match[0]}' by #{nick}"
end
If you want to match private messages use the on :private event:
on :private, /^login (\S+) (\S+)/ do
username = match[0]
password = match[1]
# do something to authorize or whatevz.
msg nick, "Login successful!"
end
You can also pass the RegExp captures as block arguments:
on :channel, /catch this: (.*) and this: (.*)/ do |first, last|
# `first` will contain the first regexp capture,
# `last` the second.
end
Defining helpers
Helpers should not be defined in the top level, but instead using the helpers
-constructor:
helpers do
def rain_check(meeting)
msg nick, "Can I have a rain check on the #{meeting}?"
end
end
on :private, /date/ do
rain_check("romantic date")
end
Errors, errors, errors
Errors, as specified by RFC 1459, can be reacted upon as well. If you e.g. try to send a message to a non-existant nick you will get error 401: “No such nick/channel”.
on :error, 401 do
# Do something.
end
Available variables: nick
and channel
.
Contribute
The source is hosted at GitHub: github.com/ichverstehe/isaac
License
The MIT. Google it.