74 lines
2.3 KiB
Lua
74 lines
2.3 KiB
Lua
--
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-- censor.lua: black out certain users' messages
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--
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-- Copyright (c) 2016, Přemysl Eric Janouch <p@janouch.name>
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--
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-- Permission to use, copy, modify, and/or distribute this software for any
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-- purpose with or without fee is hereby granted.
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--
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-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
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-- SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
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-- OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
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-- CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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--
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local to_pattern = function (mask)
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if not mask:match ("!") then mask = mask .. "!*" end
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if not mask:match ("@") then mask = mask .. "@*" end
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-- That is, * acts like a wildcard, otherwise everything is escaped
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return "^" .. mask:gsub ("[%^%$%(%)%%%.%[%]%+%-%?]", "%%%0")
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:gsub ("%*", ".*") .. "$"
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end
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local patterns = {}
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local read_masks = function (v)
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patterns = {}
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local add = function (who, where)
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local channels = patterns[who] or {}
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table.insert (channels, where)
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patterns[who] = channels
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end
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for item in v:lower ():gmatch ("[^,]+") do
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local who, where = item:match ("^([^/]+)/*(.*)")
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if who then add (to_pattern (who), where == "" or where) end
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end
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end
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degesch.setup_config {
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masks = {
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type = "string_array",
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default = "\"\"",
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comment = "user masks (optionally \"/#channel\") to censor",
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on_change = read_masks
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},
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}
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local censor = function (line)
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-- Taking a shortcut to avoid lengthy message reassembly
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local start, text = line:match ("^(.- PRIVMSG .-:)(.*)$")
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local ctcp, rest = text:match ("^(\x01%g+ )(.*)")
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text = ctcp and ctcp .. "\x0301,01" .. rest or "\x0301,01" .. text
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return start .. text
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end
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degesch.hook_irc (function (hook, server, line)
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local msg = degesch.parse (line)
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if msg.command ~= "PRIVMSG" then return line end
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local channel = msg.params[1]:lower ()
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for who, where in pairs (patterns) do
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if msg.prefix:lower ():match (who) then
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for _, x in pairs (where) do
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if x == true or x == channel then
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return censor (line)
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end
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end
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end
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end
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return line
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end)
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