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LuaIRC/util.lua

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2010-04-04 16:55:12 +02:00
local setmetatable = setmetatable
local char = string.char
local table = table
local assert = assert
local tostring = tostring
local type = type
module "irc"
--protocol parsing
function parse(line)
local colonsplit = line:find(":", 2)
local last
if colonsplit then
last = line:sub(colonsplit+1)
line = line:sub(1, colonsplit-2)
end
local prefix
if line:sub(1,1) == ":" then
local space = line:find(" ")
prefix = line:sub(2, space-1)
line = line:sub(space)
end
local params = {}
local it, state, init = line:gmatch("(%S+)")
local cmd = it(state, init)
for sub in it, state, init do
params[#params + 1] = sub
end
if last then params[#params + 1] = last end
return prefix, cmd, params
end
function parsePrefix(prefix)
local user = {}
if prefix then
user.nick, user.username, user.host = prefix:match("(.*)!(.*)@(.*)")
end
return user
end
--mIRC markup scheme (de-facto standard)
color = {
black = 1,
blue = 2,
green = 3,
red = 4,
lightred = 5,
purple = 6,
brown = 7,
yellow = 8,
lightgreen = 9,
navy = 10,
cyan = 11,
lightblue = 12,
violet = 13,
gray = 14,
lightgray = 15,
white = 16
}
local colByte = char(3)
setmetatable(color, {__call = function(_, text, colornum)
colornum = type(colornum) == "string" and assert(color[colornum], "Invalid color '"..colornum.."'") or colornum
return table.concat{colByte, tostring(colornum), text, colByte}
end})
local boldByte = char(2)
function bold(text)
return boldByte..text..boldByte
end
local underlineByte = char(31)
function underline(text)
return underlineByte..text..underlineByte
end