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-rw-r--r--plugins/degesch/slack.lua71
1 files changed, 71 insertions, 0 deletions
diff --git a/plugins/degesch/slack.lua b/plugins/degesch/slack.lua
new file mode 100644
index 0000000..79f5d88
--- /dev/null
+++ b/plugins/degesch/slack.lua
@@ -0,0 +1,71 @@
+--
+-- slack.lua: try to fix up UX when using the Slack IRC gateway
+--
+-- Copyright (c) 2017, Přemysl Janouch <p.janouch@gmail.com>
+--
+-- Permission to use, copy, modify, and/or distribute this software for any
+-- purpose with or without fee is hereby granted, provided that the above
+-- copyright notice and this permission notice appear in all copies.
+--
+-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+-- WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+-- MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
+-- SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+-- WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
+-- OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+-- CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+--
+
+local servers = {}
+local read_servers = function (v)
+ servers = {}
+ for name in v:lower ():gmatch "[^,]+" do
+ servers[name] = true
+ end
+end
+
+degesch.setup_config {
+ servers = {
+ type = "string_array",
+ default = "\"\"",
+ comment = "list of server names that are Slack IRC gateways",
+ on_change = read_servers
+ }
+}
+
+-- We can handle external messages about what we've supposedly sent just fine,
+-- so let's get rid of that "[username] some message sent from the web UI" crap
+degesch.hook_irc (function (hook, server, line)
+ local msg, us = degesch.parse (line), server.user
+ if not servers[server.name] or msg.command ~= "PRIVMSG" or not us
+ or msg.params[1]:lower () ~= us.nickname:lower () then return line end
+
+ -- Taking a shortcut to avoid lengthy message reassembly
+ local quoted_nick = us.nickname:gsub ("[%^%$%(%)%%%.%[%]%*%+%-%?]", "%%%0")
+ local text = line:match ("^.- PRIVMSG .- :%[" .. quoted_nick .. "%] (.*)$")
+ if not text then return line end
+ return ":" .. us.nickname .. "!" .. server.irc_user_host .. " PRIVMSG "
+ .. msg.prefix:match "^[^!@]*" .. " :" .. text
+end)
+
+degesch.hook_completion (function (hook, data, word)
+ local chan = degesch.current_buffer.channel
+ local server = degesch.current_buffer.server
+ if not chan or not servers[server.name] then return end
+
+ -- In /commands there is typically no desire at all to add the at sign
+ if data.location == 1 and data.words[1]:match "^/" then return end
+
+ -- Handle both when the at sign is already there and when it is not
+ local needle = word:gsub ("^@", ""):lower ()
+
+ local t = {}
+ for i, chan_user in ipairs (chan.users) do
+ local nick = chan_user.user.nickname
+ if data.location == 0 then nick = nick .. ":" end
+ if nick:sub (1, #needle):lower () == needle then
+ table.insert (t, "@" .. nick)
+ end
+ end
+ return t
+end)