File Navigator

local tArg = {...}
local UserKeys = {}

function Nav(Dir)
App.Clear()
App.newText("path",Dir,3,1)
App.newButton("return","<-","tsk."..fs.getDir(Dir),1,1)
local list = fs.list(Dir)
for i = 1, #list do
    local text
    if fs.isDir(list[i]) then
        text = "/"..list[i]
    else
        text = list[i]
    end
    App.newButton("path"..i,text,"tsk."..fs.combine(Dir,list[i]),2, i + 2)
end
end

function getKeys()
local file = fs.open(fs.combine("os/System/Users",settings.get("active_user"),"UserKeys.txt")),"r")
UserKeys = textutils.unserialize(file.readAll())
file.close()
end

function CheckKeys(file)
local Pass = Sec.CheckAccess(file)
if Pass == true then
    shell.run("edit",file)
else
    App.Clear()
    App.newButton("error","missing file key","tsk."..fs.getDir(file),1,5)
end
end

getKeys()
if tArg[1] == "start" then
    Nav("os/System")
else
   if fs.isDir(tArg[1]) then
        Nav(tArg[1])
   else
       CheckKeys(tArg[1])
   end
end