GetCooldownLeft

GetCooldownLeft.lua

--[[
  Returns the true cooldown of an ability or item, correcting for https://github.com/Stanzilla/WoWUIBugs/issues/47

  Credit to Eliote and Arkoniel in the WoW Addons discord
]]

local function GetCooldownLeft(start, duration)
    if start < GetTime() then
        local cdEndTime = start + duration
        local cdLeftDuration = cdEndTime - GetTime()
        
        return cdLeftDuration
    end
    local time = time()
    local startupTime = time - GetTime()    
    local cdTime = (2 ^ 32) / 1000 - start
    local cdStartTime = startupTime - cdTime
    local cdEndTime = cdStartTime + duration
    local cdLeftDuration = cdEndTime - time
    
    return cdLeftDuration
end