Ariana v.1

--[[
  This os named Ariana v.1 is made
  by Awesomesause200 you are allowed to edit this
  code but you cannot
  redistribute without my prior allowance
]]--
--for printing functions
w,h = term.getSize()
--version
osName = "Ariana v.1"
--Username and passwords
Usernames = {"Someone","guest"}
Passwords = {"Someone","guest"}
--Access to Computer
Access = false
--Colors for stuff
BGC = colors.black
TC = colors.white
TC2 = colors.blue
TC3 = colors.lightGray
BarColor = colors.blue
ContextMenuColor1 = colors.lightBlue
ContextMenuTextColor1 = colors.black
--printing functions
--Some learned from nitrofingers
function printCentered(str,ypos)
  term.setCursorPos(w/2 - #str/2,ypos)
  term.write(str)
end

function printRight(str,ypos)
  term.setCursorPos(w-#str,ypos)
  term.write(str)
end

function pr(str,x,y)
  term.setCursorPos(x,y)
  term.write(str)
end
--Extra functions
function Reset(x,y)
  term.clear()
  term.setCursorPos(x,y)
end

function setColor(Backgroundcolor,Textcolor)
  term.setBackgroundColor(Backgroundcolor)
  term.setTextColor(Textcolor)
end

function drawHeaderForLogin()
  setColor(BGC,TC)
  term.clear()
  paintutils.drawLine(1,1,w,1,BarColor)
  printCentered("- welcome to "..osName.."-",1)
end

function LoginScreen()
  setColor(BGC,TC2)
  printCentered("Username: ",h/2-1)
  printCentered("Password: ",h/2+1)
  printRight("Guest account:",h-2)
  printRight("User = guest ",h-1)
  printRight("Pass = guest ",h)
  term.setCursorPos(w/2 + 4,h/2-1)
  User = read()
  term.setCursorPos(w/2 + 4,h/2+1)
  Pass = read()
  for i = 1,#Usernames do
      if Usernames[i] == User then
          if Passwords[i] == Pass then
              Access = true
          end
      end
  end
end

function contextMenu()
  setColor(ContextMenuColor1,ContextMenuTextColor1)
    term.setCursorPos(1,2)
      print("Shutdown       ")
      print("               ")
      print("Restart        ")
      print("               ")
      print("Logoff         ")

    e,m,x,y = os.pullEvent("mouse_click")

      if m == 1 and x > 1 and x < 16 and y == 2 then
        os.shutdown()
      elseif m == 1 and x > 1 and x < 16 and y == 4 then
        os.reboot()
      elseif m == 1 and x > 1 and x < 16 and y == 6 then
        shell.run(shell.getRunningProgram())
      else
        term.clear()
        mainScreen()
      end
end

function drawHeaderForMain()
  setColor(BGC,TC3)
  Reset(1,1)
  paintutils.drawLine(1,1,w,1,BarColor)
  printCentered("-"..osName.."-",1)
  pr("-os-",1,1)
end

function mainScreen()
  drawHeaderForMain()
  parallel.waitForAny(
  function()
    while true do
      term.setCursorPos(w-8,1)
        print(textutils.formatTime(os.time()))
      sleep(1)
      term.setCursorPos(w-8,1)
        print("        ")
    end
  end,
  function()
    e,m,x,y = os.pullEvent("mouse_click")
  end
  )
      if m == 1 and x > 1 and x < 5 and y == 1 then
        contextMenu()
      elseif m == 2 then
        term.setCursorPos(x,y)
          print("Edit ariana v.1")
        y = y+1
        term.setCursorPos(x,y)
          print("               ")
        y = y+1
        term.setCursorPos(x,y)
          print("Explore files  ")
        y = y-2
      else
        mainScreen()
      end

        newe,newm,newx,newy = os.pullEvent("mouse_click")

      if newm == 1 and newx >= x and newx <= x+16 and newy == y then
        shell.run("edit "..shell.getRunningProgram())
        shell.run(shell.getRunningProgram())
      elseif newm == 1 and newx >= x and newx <= x+16 and newy == y+2 then
        shell.run("Browser")
        term.clear()
        mainScreen()
      else
        term.clear()
        mainScreen()
      end
end

--Code starts here
drawHeaderForLogin()
LoginScreen()

if Access == true then
  mainScreen()
end