keystoneText.lua

-- init
aura_env.nicknames = {}

for _, entry in pairs(aura_env.config.nicknames) do
    aura_env.nicknames[entry.challengeMapId] = entry.nickname
end

aura_env.getKeystoneInfoFromItemLink = function(itemLink)
    -- Return the map ID and level of the specified keystone 'itemLink'.  If
    -- 'itemLink' is not a keystone item link, return 'nil'.

    if itemLink == nil then
        return
    end

    local mapId, level = select(3, itemLink:find("|Hkeystone:180653:(%d+):(%d+):"))

    if mapId == nil then
        local bonusIds = select(3, itemLink:find("|Hitem:180653:(.+)"))
        if bonusIds == nil then
            return
        end

        local _
        mapId, _, level = select(15, strsplit(":", bonusIds))

        if mapId == nil then
            return
        end
    end

    return tonumber(mapId), tonumber(level)
end

-- trigger: BAG_UPDATE_DELAYED, CHALLENGE_MODE_START, CHALLENGE_MODE_COMPLETED, WA_DEFERRED_KEYSTONE_CHECK, ITEM_CHANGED, OPTIONS
function(event, ...)
    local aura_env = aura_env

    if event == "CHALLENGE_MODE_COMPLETED" then
        -- The keystone changes after this event is fired. Schedule an update.

        C_Timer.After(1, function() WeakAuras.ScanEvents("WA_DEFERRED_KEYSTONE_CHECK") end)
        return false
    elseif event == "ITEM_CHANGED" then
        -- Parse the keystone info, if any, from the new item link.

        local newItemLink = select(2, ...)
        local mapId, level = aura_env.getKeystoneInfoFromItemLink(newItemLink)

        if mapId == nil then
            return false
        end

        aura_env.keystoneMapId, aura_env.keystoneLevel = mapId, level

        return true
    else
        local previousKeystoneMapId = aura_env.keystoneMapId
        local previousKeystoneLevel = aura_env.keystoneLevel

        aura_env.keystoneMapId = C_MythicPlus.GetOwnedKeystoneChallengeMapID()
        aura_env.keystoneLevel = C_MythicPlus.GetOwnedKeystoneLevel()

        return (aura_env.keystoneMapId ~= nil
                and (event == "OPTIONS"
                        or aura_env.keystoneMapId ~= previousKeystoneMapId
                        or aura_env.keystoneLevel ~= previousKeystoneLevel))
    end
end

-- untrigger
function()
    return aura_env.keystoneMapId == nil
end

-- name
function()
    local name = aura_env.nicknames[aura_env.keystoneMapId]

    if name == nil or name == "" then
        name = C_ChallengeMode.GetMapUIInfo(aura_env.keystoneMapId)
    end

    return name .. " (" .. aura_env.keystoneLevel .. ")"
end

-- icon
function()
    return select(4, C_ChallengeMode.GetMapUIInfo(aura_env.keystoneMapId))
end