Scripting interface for customisation

[Southclaws]

What do you want

Inspired by the days of mIRC and other clients. This would provide users a way to do things like modify messages prior to sending, add AFK messages ("gone fishing.") and other cool things by triggering events in a small VM.

The two contenders for this would be:

• https://github.com/d5/tengo an embeddable script language for Go with dynamic types and Go-like sytax.
• https://github.com/robertkrimen/otto a JavaScript parser and interpreter written natively in Go. Probably more familiar to users given it's an established language.

(or why not both!?)

Why

I thought of this while playing with the colour feature. While cool, the colour feature doesn't seem like something that should be available by default while at the same time it's trivial to implement - simply replace [yellow] with \033[33m.

This could also lead to some other simple features, nothing too automated as we don't want to give users too much of a chance to get banned with bot-like messages but simple afk messages when @'d would be useful along with fun /shrug like commands to insert common emoticons ( ͡° ͜ʖ ͡°)

[Bios-Marcel]

Initially implemented with https://github.com/Bios-Marcel/cordless/pull/29.

Currently there is just one method called onMessageSend. I plan to add more soon.

We might still add a second language. At least for the sake of not accidentaly coupling to tight!