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-rw-r--r--plugins/xC/slack.lua147
1 files changed, 147 insertions, 0 deletions
diff --git a/plugins/xC/slack.lua b/plugins/xC/slack.lua
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+--
+-- slack.lua: try to fix up UX when using the Slack IRC gateway
+--
+-- Copyright (c) 2017, Přemysl Eric Janouch <p@janouch.name>
+--
+-- Permission to use, copy, modify, and/or distribute this software for any
+-- purpose with or without fee is hereby granted.
+--
+-- 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
+
+-- This is a reverse list of Slack's automatic emoji, noseless forms
+local unemojify, emoji, emoji_default = false, {}, {
+ heart = "<3",
+ broken_heart = "</3",
+ sunglasses = "8)",
+ anguished = "D:",
+ cry = ":'(",
+ monkey_face = ":o)",
+ kiss = ":*",
+ smiley = "=)",
+ smile = ":D",
+ wink = ";)",
+ laughing = ":>",
+ neutral_face = ":|",
+ open_mouth = ":o",
+ angry = ">:(",
+ slightly_smiling_face = ":)",
+ disappointed = ":(",
+ confused = ":/",
+ stuck_out_tongue = ":p",
+ stuck_out_tongue_winking_eye = ";p",
+}
+local load_emoji = function (extra)
+ emoji = {}
+ for k, v in pairs (emoji_default) do emoji[k] = v end
+ for k, v in extra:gmatch "([^,]+) ([^,]+)" do emoji[k] = v end
+end
+
+xC.setup_config {
+ servers = {
+ type = "string_array",
+ default = "\"\"",
+ comment = "list of server names that are Slack IRC gateways",
+ on_change = read_servers
+ },
+ unemojify = {
+ type = "boolean",
+ default = "true",
+ comment = "convert emoji to normal ASCII emoticons",
+ on_change = function (v) unemojify = v end
+ },
+ extra_emoji = {
+ type = "string_array",
+ default = "\"grinning :)),joy :'),innocent o:),persevere >_<\"",
+ comment = "overrides or extra emoji for unemojify",
+ on_change = function (v) load_emoji (v) end
+ }
+}
+
+-- 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
+xC.hook_irc (function (hook, server, line)
+ local msg, us = xC.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)
+
+-- Unfuck emoji and :nick!nick@irc.tinyspeck.com MODE #channel +v nick : active
+xC.hook_irc (function (hook, server, line)
+ if not servers[server.name] then return line end
+ if unemojify then
+ local start, text = line:match ("^(.- PRIVMSG .- :)(.*)$")
+ if start then return start .. text:gsub (":([a-z_]+):", function (name)
+ if emoji[name] then return emoji[name] end
+ return ":" .. name .. ":"
+ end) end
+ end
+ return line:gsub ("^(:%S+ MODE .+) : .*", "%1")
+end)
+
+-- The gateway simply ignores the NAMES command altogether
+xC.hook_input (function (hook, buffer, input)
+ if not buffer.channel or not servers[buffer.server.name]
+ or not input:match "^/names%s*$" then return input end
+
+ local users = buffer.channel.users
+ table.sort (users, function (a, b)
+ if a.prefixes > b.prefixes then return true end
+ if a.prefixes < b.prefixes then return false end
+ return a.user.nickname < b.user.nickname
+ end)
+
+ local names = "Users on " .. buffer.channel.name .. ":"
+ for i, chan_user in ipairs (users) do
+ names = names .. " " .. chan_user.prefixes .. chan_user.user.nickname
+ end
+ buffer:log (names)
+end)
+
+xC.hook_completion (function (hook, data, word)
+ local chan = xC.current_buffer.channel
+ local server = xC.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 = {}
+ local try = function (name)
+ if data.location == 0 then name = name .. ":" end
+ if name:sub (1, #needle):lower () == needle then
+ table.insert (t, "@" .. name)
+ end
+ end
+ for _, chan_user in ipairs (chan.users) do
+ try (chan_user.user.nickname)
+ end
+ for _, special in ipairs { "channel", "here" } do
+ try (special)
+ end
+ return t
+end)