BuffAlert.lua

--[[Copyright © 2018, Rubenator
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_addon.name = 'BuffAlert'
_addon.author = 'Rubenator'
_addon.version = '0.1'
require("luau")

local buffs_to_watch = {["Mana Wall"]={buff_duration=5*60, alert_time=1*60}
					   }
local sound_path = "alert.wav"
local sound_in_addon_folder = true
local message = true

function warning(buff)
	if buffs_to_watch[buff] == nil then return end
	if buffs_to_watch[buff].canceled == nil or not buffs_to_watch[buff].canceled then
		local buff_data = buffs_to_watch[buff]
		local minutes = math.floor(buff_data.alert_time / 60)
		local seconds = buff_data.alert_time % 60
		local time_string = string.format("%d:%00d",minutes, seconds)
		--output log message?
		if message then
			windower.add_to_chat(4, buff.." will wear off in "..time_string..".")
		end
		--make sound?
		local path = sound_path
		if sound_in_addon_folder then
			path = windower.addon_path .. sound_path
		end
		if sound_path then
			print("playing sound ", path)
			windower.play_sound(path)
		end
		print("sound done")
	end
end

function get_buff_name(buff_id)
	if res.buffs[buff_id] and res.buffs[buff_id].en then
		return res.buffs[buff_id].en
	else
		return nil
	end
end

windower.register_event('gain buff', function(buff_id)
	local buff = get_buff_name(buff_id)	
	if buffs_to_watch[buff] ~= nil then
		buffs_to_watch[buff].canceled = false
		coroutine.schedule(function()
			warning(buff)
		end, buffs_to_watch[buff].buff_duration - buffs_to_watch[buff].alert_time)
	end
end)

windower.register_event('lose buff', function(buff_id)
	local buff = get_buff_name(buff_id)
	if buffs_to_watch[buff] ~= nil then
		buffs_to_watch[buff].canceled = true
	end
end)