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local cqueues = require("cqueues")
local socket = require("cqueues.socket")
local fs = require("fs")
local fifo = require("fifo")
local mom = require("mom")
local function parse_message(data)
if string.match(data, "[\0\r\n]") then return nil, "illegal character" end
local pos = 1
local prefix
local command
local params = {}
if string.match(data, "^:") then
prefix, pos = string.match(data, "^:([^ ]+)()")
end
command, pos = string.match(data, "([^ ]+)()", pos)
while pos < #data do
local start, param
start, param, pos = string.match(data, "()([^ ]+)()", pos)
if not start then break end
if string.sub(param, 1, 1) == ":" then
table.insert(params, string.sub(data, start + 1))
break
else
table.insert(params, param)
end
end
return { params = params, command = command, prefix = prefix }
end
local function emit_message(message)
local out = {}
if message.prefix then
table.insert(out, message.prefix)
table.insert(out, " ")
end
table.insert(out, message.command)
for i, v in ipairs(message.params or {}) do
assert(not string.match(i, "[\0\r\n]"))
if i == #(message.params or {}) then
table.insert(out, " :")
table.insert(out, v)
else
assert(not string.match(v, "^:"))
table.insert(out, " ")
table.insert(out, v)
end
end
return table.concat(out)
end
local irc_handlers = {}
local function source_to_nick(source)
return string.match(source, "[^!@]*")
end
do -- test source_to_nick
assert(source_to_nick("a!username@host") == "a")
assert(source_to_nick("argh") == "argh")
assert(source_to_nick("man@host") == "man")
end
local function irc_dump(fifo, socket)
for data in fifo:iter() do
data = emit_message(data)
if not string.match(data, "[\r\n]") and #string <= 510 then
socket:write(data .. "\r\n")
end
end
end
function irc_handlers.PING(state, line)
fifo.put(state.queue, { command = "PONG", params = line.params })
end
function irc_handlers._001(state, line)
state.nick = line.params[1]
for k, v in pairs(state.config.channels) do
state.queue:put({ command = "JOIN", params = { k } })
end
end
function irc_handlers.JOIN(state, line)
local config = state.config
if not (line.prefix and source_to_nick(line.prefix) == state.nick) then
return
end
-- TODO several channels at once with commas
if not config.channels[line.params[1]] then
return
end
if not state.channels[line.params[1]] then
-- TODO validate the params at all
local ch_name = line.params[1]
local ch = {}
state.channels[ch_name] = ch
ch.command = config.channels[ch_name].command or config.command
ch.invoke = config.channels[ch_name].invoke or config.invoke
ch.mom_id, ch.tx_queue = state.mom:create(
ch.command,
ch_name,
state.rx_queue
)
end
end
function irc_handlers.PRIVMSG(state, line)
-- fifo.put(state.to_ed, line.params[2])
if not state.channels[line.params[1]] then
-- TODO
return
end
state.channels[line.params[1]].tx_queue:put(
line.params[2]
)
end
local function handle_ed_rx(state)
for line in state.rx_queue:iter() do
if line[2] == "line" then
state.queue:put({
command = "PRIVMSG",
params = {
line[1],
line[3],
}
})
elseif line[2] == "quit" then
state.queue:put({
command = "PART",
params = {
line[1],
}
})
-- we do a little trolling
state.loop:wrap(function()
cqueues.poll(10.0)
state.queue:put({
command = "JOIN",
params = {
line[1],
-- TODO config joins
-- (for keys etc)
},
})
end)
end
end
end
local function irc_connect(loop, host, config)
local state = {
-- IRC output queue (message objects)
queue = fifo.new(),
loop = loop,
nick = config.nick or "ed1bot",
command = config.command,
config = config,
-- global rx queue from various eds
rx_queue = fifo.new(),
-- active channels! we populate this when we get a join
-- that we allow (i.e. that has an entry in the config)
-- a channel has the fields:
-- - invoke, a list of patterns (as in config, but being
-- properly populated with defaults)
-- - mom_id, the id in the state's process mom
-- - tx_queue: to send messages to the ed queue
-- (note we don't have rx_queue: that is shared)
channels = {},
}
local sock = assert(socket.connect(host))
sock:starttls()
loop:wrap(function () irc_dump(state.queue, sock) end)
loop:wrap(function ()
for raw_line in sock:lines("*l") do -- TODO set line length
local line = parse_message(raw_line)
-- TODO assert line or something
if not line then
print("bad line! " .. raw_line)
line = { command = "BADLINE", params = { line } }
end
local command = (tonumber(line.command) and "_" or "") .. line.command
if irc_handlers[command] then
irc_handlers[command](state, line)
end
end
os.exit(0)
end)
loop:wrap(function ()
local f = fs.new(0)
for line in f:lines() do
fifo.put(state.queue, parse_message(line))
end
end)
state.mom = mom.new(loop)
loop:wrap(function () handle_ed_rx(state) end)
fifo.put(state.queue, { command = "NICK", params = { config.nick } })
fifo.put(state.queue, { command = "USER", params = { "ed1bot", "0", "*", ":)" } })
end
local main = cqueues.new()
if not arg[1] then
print("usage: edbot [CONFIG]")
os.exit(1)
end
main:wrap(function () irc_connect(main, { host = "localhost", port = 6697 }, dofile(arg[1])) end)
assert(main:loop())
return { parse_message = parse_message }
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