Aperture Science OS System - App Menu 01

os.pullEvent = os.pullEventRaw
--Client Program Manager
--this program allows the user to see all download applications, management using inbuilt tools, start programs, etc
--this program is for minecraft 1.16.5, cc tweaked

local AppAmount = 0
local w, h = term.getSize()
local AppName = {}
local AppFile = {}
local nOption = 0

function CenterText(y,text)
  local x = math.floor((w - string.len(text)) /2)
  term.setCursorPos(x,y)
  term.clearLine()
  term.write(text)
end


function GetApps()
local file = fs.open("AppList","r")
local Items = file.readLine(1)
for i = 1, Items do
  AppName[i] = file.readLine(i*2)
  AppFile[i] = file.readLine(i*2+1)
end
file.close()
end

function AppList()

end

local function drawMenu()
term.clear()
if nOption == 0 then
  term.setCursorPos(w-11,1)
  term.write("Exit")
end
for i = 1, #AppName do
  if nOption == i then
    term.setCursorPos(w-11,1)
    CenterText(1,AppName[i].." - "..AppFile[i])
  end
end
end

term.clear()
local function drawFrontend()
CenterText( math.floor(h/2) - 3, "")
CenterText( math.floor(h/2) + 3, ((nOption == 0) and "[ Exit ]") or "Exit" )
for i = 1, #AppName do
  CenterText( math.floor(h/2) + i+4, ((nOption == i) and "[ "..AppName[i].." ]") or AppName[i] )
end
end

GetApps()
drawMenu()
drawFrontend()

while true do
  local event, key = os.pullEvent("key")
  if key == keys.w or key == keys.up then
    nOption = nOption - 1
  elseif key == keys.s or key == keys.down then
    nOption = nOption + 1
  end
if nOption < 0 then
  nOption = #AppName
elseif nOption > #AppName then
  nOption = 0
end
drawMenu()
drawFrontend()
if key == keys.enter then
  break
end

end

if nOption > 0 then
  if nOption == 1 then
    if fs.exists("ApertureDL_AppStore") == nil or fs.exists("ApertureOS_AppStore") == false then
      term.clearLine()
      local x, y = term.getCursorPos()
      term.setCursorPos((w - string.len("Downloading.....done!")/2), y)
      textutils.slowWrite("Downloading...done!")
      shell.run("C_Pastebin","run","SJ9gjJ6H")
      sleep(3)
      shell.run("ApertureDL_AppStore")
    else
      shell.run("ApertureDL_AppStore")
    end
  elseif nOption == 2 then
    shell.run("ApertureOS_SettingsMenu")
  else
    shell.run(AppFile[nOption])
  end
elseif nOption == 0 then
  shell.run("ApertureOS_Base")
else

end