-- Source https://stackoverflow.com/a/11130774
function scandir(directory)
    local directory = directory or ""
		local i, t, popen = 0, {}, io.popen
		local pfile = popen('ls "'..directory..'"')
		for filename in pfile:lines() do
				i = i + 1
				t[i] = filename
		end
		pfile:close()
		return t
end

function getFormattedLessonNames(directory)
    local t = scandir(directory)
    for i=1, #t do
				t[i] = colorTextBackground(COLOR.Black,"\n#" .. i .. " " .. colorText(COLOR.HighBlue,string.gsub(t[i],".lua","")))
    end
		return t
end

function lesson(number)
  number = tonumber(number)
  local t = scandir(dir.."/heonian-content/lessons/")
  if t[number] then
    dofile("heonian-content/lessons/"..t[number])
  else
    print("lesson not found")
  end
end

function lessonPause()
  print("\nInput anything to continue")
  io.read()
  print(scrollTerminalUp(4))
end