--ROBLOX LAUNCHER

--Find the current version file
function FindRbxPlayer()
    function scandir(directory,mode) --Return array with all results of "dir /b /mode"
        local i, t, popen = 0, {}, io.popen
        for filename in popen('dir "'..directory..'" /b '.. mode):lines() do
            i = i + 1
            t[i] = filename
        end
        return t
    end

    for
        --looks in all folders in versions
        i,v in pairs (scandir("%appdata%/../Local/Roblox/Versions","/ad")) -- /ad mode finds all folders
    do
        --looks in each folder for robloxplayerbeta and returns the version
        for k,x in pairs (scandir("%appdata%/../Local/Roblox/Versions/"..v,"/a-d")) do -- /a-d mode finds all non-folders
            if x=="RobloxPlayerBeta.exe" then
                return v
            end
        end
    end
end

--sets the current version to the found version
local CURRENTVERSION=FindRbxPlayer()
--These are here just because
local presets= { ["kk"]=157005930, ["cf"]=101554146,["piggy"]=155856024,["mc"]=170222579, ["ap"]=1600503;
                ["aph"]=99015795}
function LaunchGame()
    print("Paste a place ID here.")
    local input=io.stdin:read()--accept user input
    if
        input=="RESET" --allow resetting to find new version in case of update
    then
        CURRENTVERSION=FindRbxPlayer()
        LaunchGame()
    end
    local ID=( presets[input] or input)--Did you shortcut?
    presets["last"]=input
    print("Launching game, please wait..")
    --launches a game with the given ID
    os.execute("%appdata%/../Local/Roblox/Versions/"..CURRENTVERSION.."/RobloxPlayerBeta.exe --id "..ID)
    print("Game closed.")
    LaunchGame() --allows you to paste another ID
end
LaunchGame()