!! / !bang?

[asottile]

1:05 MetaBytez: Do you have a command !! that just repeats the last bot command 
Kappa
1:05 MetaBytez: Or maybe !bang

[Preocts]

Would you two be open to me taking a stab at this one?

[asottile]

iirc this is hard / not really feasible since every message is dispatched independently and asynchronously

[Preocts]

I was poking around and the add_alias() function caught my muse. Would appear if an alias !bang and !! were made of the most recent command successfully found that you'd have part of the desired outcome. I may have missed some I/O but it looked to me like commands are only held in memory so this call felt very inexpensive.

twitch-chat-bot/bot/data.py

Lines 113 to 116 in 50341c3

	def add_alias(cmd: str, *aliases: str) -> None:
	for alias in aliases:
	COMMANDS[alias] = COMMANDS[cmd]
	SECRET_CMDS.add(alias)

How to handle keeping message permissions from being skipped, that all commands are stripped of extra bangs, and the command pattern doesn't presently match !! were where I stopped.

twitch-chat-bot/bot/data.py

Line 144 in 50341c3

command = f'!{cmd_match["cmd"].lstrip("!").lower()}'

twitch-chat-bot/bot/data.py

Line 18 in 50341c3

COMMAND_PATTERN_RE = re.compile(r'!+\w+')

(either way, neat implementation and I learned a few things digging through it which was my primary goal!)

[asottile]

the aliasing system is for command names and probably wouldn't work or help for command values -- it's also meant to be ~immutable after process startup