Change the behaviour of service code detection
- Parse service codes if they are sent as `!code` or `nick: !code` in channels and private messages (where `!code` is an example code prefix and service code, and `nick` is the bot's nick). If the service code is not provided at the start of the message body, it will be treated as a message without a service code and passed to the target handler. - If a target handler is defined, both messages in the form `nick: message` in a channel and `message` in a private message will be sent to the handler. The `nick:` at the start of `nick: message` will no longer be filtered out. The default name of the target handler is `target`, as in `itte_handlers.target(cxt, msg)`. This can be changed in the config by setting a new `itte_config.target_handler` value.
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itte.lua
71
itte.lua
@ -251,16 +251,31 @@ function itte.get_commands(svr)
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resp = "QUIT :",
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},
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target_private = {
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-- Like privmsg but targets bot nick in a direct message without a
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-- service code.
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-- Escape magic character "-"
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check = "PRIVMSG(.*)" .. string.gsub(svr.nick, "-", "%%-") .. "(.*):",
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resp = nil,
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},
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target_private_code = {
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-- Like privmsg but targets bot nick in a direct message
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-- Escape magic character "-"
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check = "PRIVMSG(.*)" .. string.gsub(svr.nick, "-", "%%-") .. ":",
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resp = "PRIVMSG ",
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check = "PRIVMSG(.*)" .. string.gsub(svr.nick, "-", "%%-") .. "(.*):" ..
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string.gsub(svr.nick, "-", "%%-") .. "(.*)" .. svr.code_prefix,
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resp = nil,
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},
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target_public = {
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-- Like privmsg but targets bot nick in a channel
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-- Like privmsg but targets bot nick in a channel without a service code.
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-- Escape magic character "-"
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check = "PRIVMSG(.*)#(.*):" .. string.gsub(svr.nick, "-", "%%-"),
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resp = "PRIVMSG ",
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resp = nil,
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},
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target_public_code = {
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-- Like privmsg but targets bot nick in a channel
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-- Escape magic character "-"
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check = "PRIVMSG(.*)#(.*):" .. string.gsub(svr.nick, "-", "%%-") ..
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"(.*)" .. svr.code_prefix,
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resp = nil,
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},
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user = {
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check = "NOTICE",
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@ -610,18 +625,16 @@ function itte.parse_privmsg(cxt, str, mode)
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-- Separator marks the start of the message body
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body_sep, _ = string.find(str, ":", 2)
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-- Message in the format `[nick]: [body]`
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-- Message in the format `[body]` (private message) or `[nick]: [body]`
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if mode == "target" then
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msg = {
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sender = string.sub(str, string.find(str, "!") + 2,
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string.find(str, "@") - 1),
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-- Escape magic character "-" in the nick
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recipient = string.sub(str, string.find(str, "PRIVMSG") + 8,
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string.find(str, ":" .. string.gsub(cxt.nick, "-", "%%-")) - 2),
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string.find(str, " :") - 1),
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reply_to = string.sub(str, string.find(str, "!") + 2,
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string.find(str, "@") - 1),
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body = string.gsub(string.sub(str, body_sep + 2 +
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string.len(cxt.nick)), "^%s", ""),
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body = string.sub(str, body_sep + 1),
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}
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-- Reply to sender by default (private message), or reply in a channel if
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-- original message recipient is a channel.
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@ -635,19 +648,31 @@ function itte.parse_privmsg(cxt, str, mode)
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", " .. itte.config.debugs.privmsg[7] .. ": " .. msg.body ..
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" }", itte.config.debug)
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-- Message in the format `[code] [params]`
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-- Message in the format `[code] [params]` or `[nick] [code] [params]`
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else
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-- Set the code prefix position variable to a number out of range of the
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-- service code parsing buffer, then get the position. Check for the colon
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-- separator at exactly the start of the message body, i.e. `[code]`, or
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-- the space char for `[nick] [code]`.
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local code_full = ""
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-- Service code found with specified prefix
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if util.is_substr(str, ":" .. cxt.code_prefix) then
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code_full = string.sub(str, string.find(str, ":" ..
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cxt.code_prefix) + 1 + string.len(cxt.code_prefix))
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local cp_pos = body_sep + string.len(cxt.nick) + 4
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local co_sep, _ = string.find(str, ":" .. cxt.code_prefix)
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if co_sep == body_sep then
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cp_pos = string.find(str, ":" .. cxt.code_prefix)
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elseif string.find(str, " " .. cxt.code_prefix) ~= nil then
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cp_pos = string.find(str, " " .. cxt.code_prefix)
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end
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-- Only parse service code if it is near the start of the message body,
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-- within a small buffer in position to allow some variation in style, e.g.
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-- `[nick]: [code]`, `[nick] [code]`, etc.
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if cp_pos <= body_sep + string.len(cxt.nick) + 3 then
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code_full = string.sub(str, cp_pos + 1 + string.len(cxt.code_prefix))
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end
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msg = {
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sender = string.sub(str, string.find(str, "!") + 2,
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string.find(str, "@") - 1),
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recipient = string.sub(str, string.find(str, "PRIVMSG") + 8,
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string.find(str, ":" .. cxt.code_prefix) - 2),
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string.find(str, " :") - 1),
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reply_to = string.sub(str, string.find(str, "!") + 2,
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string.find(str, "@") - 1),
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body = string.sub(str, body_sep + 1),
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@ -656,7 +681,6 @@ function itte.parse_privmsg(cxt, str, mode)
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msg.code = string.sub(code_full, 0, string.find(code_full, " ") - 1)
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msg.code_params = util.split_str(string.sub(code_full,
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string.find(code_full, " ") + 1))
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else
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msg.code = code_full
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msg.code_params = {}
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@ -666,7 +690,6 @@ function itte.parse_privmsg(cxt, str, mode)
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if util.is_substr(msg.recipient, "#") then
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msg.reply_to = msg.recipient
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end
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-- Redact debug output for admin-only handlers to avoid logging passwords.
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local body = msg.body
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local code_params = table.concat(msg.code_params, " ")
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@ -937,8 +960,12 @@ function itte.listen(name, str)
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local channel, names = itte.parse_names(cxt, str)
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cxt.chan_meta[channel:sub(2)] = { users = names }
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-- Respond to service code
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elseif util.is_substr(str, cxt.cmds.privmsg.check) then
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-- Respond to service code, checking for `[code]` and `[nick]: [code]`.
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-- Code prefix cannot be the last character in the data string.
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elseif (util.is_substr(str, cxt.cmds.privmsg.check) or
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(util.is_substr(str, cxt.cmds.target_public_code.check)) or
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(util.is_substr(str, cxt.cmds.target_private_code.check))) and
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(str:sub(string.len(str)) ~= cxt.code_prefix) then
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local msg = itte.parse_privmsg(cxt, str)
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-- Check for the service in the admin handlers table and redact the debug
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-- output for admin handlers.
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@ -960,6 +987,12 @@ function itte.listen(name, str)
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-- Check the handlers table
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elseif util.has_key(itte.handlers, msg.code) then
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itte.handlers[msg.code](cxt, msg)
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-- If there is no service code found near the start of the message body,
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-- respond as a direct address and pass the message to the target handler
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-- if it exists.
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elseif (util.has_key(itte.handlers, itte.config.target_handler)) and
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(msg.code == "") then
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itte.handlers[itte.config.target_handler](cxt, msg)
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else
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-- Only hint with unknown code error in private messages as there may be
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-- prefix collision in channels.
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