desktop

--Minif OS
--By Minif

--Functions and Variables
osRunning = true
osUserBGImageExists = false
osUserAdmin = false

function osDrawWindow(name)
  paintutils.drawFilledBox(3,3,osScreenSizeX-2,osScreenSizeY-2,colors.white)
  paintutils.drawBox(3,3,osScreenSizeX-2,5,colors.lightGray)
  term.setBackgroundColor(colors.white)
  term.setTextColor(colors.black)
  term.setCursorPos(4,4)
  term.write(name)
end

function osConfirm(name,message,detail)
  osDrawWindow(name)
  term.setCursorPos(4,7)
  term.write(message)
  term.setCursorPos(4,8)
  term.write(detail)
  paintutils.drawBox(4,11,osScreenSizeX-3,11,colors.green)
  term.setCursorPos(5,11)
  term.write("Yes")
  paintutils.drawBox(4,13,osScreenSizeX-3,13,colors.red)
  term.setCursorPos(5,13)
  term.write("No")
  local choice = false
  while true do
    osPEvent, osPB, osPX, osPY = os.pullEvent("mouse_click")
    if osPX >= 3 and osPX <=osScreenSizeX-2 then
      if osPY == 11 then
        choice = true
        return true
      else if osPY == 13 then
        return false
      end
      end
    end
  end
  return choice
end

function osLoadPrefs()
  local pref = fs.open("/system/user/"..osEnteredUser.."/config", "r")
  local readFile = pref.readLine()
  if fs.exists(readFile) and not (fs.isDir(readFile)) then
    os_UserBGImage = paintutils.loadImage(readFile)
    osUserBGImageExists = true
  end
  local readLine = pref.readLine()
  if readLine == "true" then
    osUserAdmin = true
  end
  pref.close()
end

--Drawing
function osDrawDesktop()
  osFillBG(colors.cyan)
  if osUserBGImageExists then
    paintutils.drawImage(os_UserBGImage,1,2)
  else
    if osBGImageExists then
      paintutils.drawImage(os_BGImage,1,1)
    end
  end
end

function osDrawMenu()
  paintutils.drawBox(1,1,osScreenSizeX,1,colors.blue)
  term.setBackgroundColor(colors.lightBlue)
  term.setTextColor(colors.black)
  term.setCursorPos(1,1)
  term.write("M >")
  term.setCursorPos(5,1)
  term.write("File >")
  term.setCursorPos(12,1)
  term.write("System >")
end

function osDrawAll()
  term.setCursorBlink(false)
  osLoadPrefs()
  osDrawDesktop()
  osDrawMenu()
end

function osDrawPerm(prog)
  paintutils.drawFilledBox(3,3,osScreenSizeX-2,osScreenSizeY-2,colors.white)
  paintutils.drawBox(3,3,osScreenSizeX-2,5,colors.lightGray)
  term.setCursorPos(4,4)
  term.setBackgroundColor(colors.white)
  term.setTextColor(colors.red)
  term.write("Permissions Error")
  term.setCursorPos(4,7)
  term.setTextColor(colors.black)
  term.write("You do not have permission")
  term.setCursorPos(4,8)
  term.write("To access the program: "..prog)
  term.setCursorPos(4,10)
  term.write("Press any key to exit.")
  while true do
    local event = os.pullEvent()
    if event == "mouse_click" or event == "key" then
      return
    end
  end
end

--Menu Routines
function osMenuM()
  term.setBackgroundColor(colors.gray)
  term.setTextColor(colors.white)
  term.setCursorPos(1,1)
  term.write("M v")
  term.setCursorPos(1,2)
  term.write("Info     ")
  term.setCursorPos(1,3)
  term.write("Log Out  ")
  term.setCursorPos(1,4)
  term.write("Shut Down")
  osPEvent, osPB, osPX, osPY = os.pullEvent("mouse_click")
  if osPEvent == "mouse_click" then
    if osPB == 1 and osPY == 3 and osPX<=9 then
      osRunning = false
    else if osPB == 1 and osPY == 4 and osPX<=9 then
      os.shutdown()
    else if osPB == 1 and osPY == 2 and osPX<=9 then
      if fs.exists("system/tools/about") then
        shell.run("system/tools/about")
      else
        osBSOD("Critical file missing.","/system/tools/about is missing, and is needed to run.","Please re-install this file")
      end
    end
    end
    end
  end
end

function osMenuFile()
  term.setBackgroundColor(colors.gray)
  term.setTextColor(colors.white)
  term.setCursorPos(5,1)
  term.write("File v")
  term.setCursorPos(5,2)
  term.write("Write ")
  term.setCursorPos(5,3)
  term.write("Paint ")
  term.setCursorPos(5,4)
  term.write("Search")
  term.setCursorPos(5,5)
  term.write("build ")

  osPEvent, osPB, osPX, osPY = os.pullEvent("mouse_click")
  if osPB == 1 and osPY == 2 and osPX >= 5 and osPX <= 10 then
    if fs.exists("system/tools/medit") then
      shell.run("system/tools/medit")
    else
      osBSOD("Critical file missing.","/system/tools/medit is missing, and is needed to run.","Please re-install this file")
    end
  else if osPB == 1 and osPY == 3 and osPX >= 5 and osPX <=10 then
    if fs.exists("system/tools/mpaint") then
      shell.run("system/tools/mpaint")
    else
      osBSOD("Critical file missing.","/system/tools/mpaint is missing, and is needed to run.","Please re-install this file")
    end
  else if osPB == 1 and osPY == 5 and osPX >= 5 and osPX <= 10 then
    if fs.exists("run") then
      shell.run("run")
    end
  else if osPB == 1 and osPY == 4 and osPX >= 5 and osPX <= 10 then
    if fs.exists("system/tools/look") then
      shell.run("system/tools/look")
    else
      osBSOD("Critical file missing.","/system/tools/look is missing, and is needed to run.","Please re-install this file")
    end
  end
  end
  end
  end
end

function osMenuSystem()
  term.setBackgroundColor(colors.gray)
  term.setTextColor(colors.white)
  term.setCursorPos(12,1)
  term.write("System v")
  term.setCursorPos(12,2)
  term.write("Shell      ")
  term.setCursorPos(12,3)
  term.write("Settings   ")
  term.setCursorPos(12,4)
  term.write("Run Program")

  osPEvent, osPB, osPX, osPY = os.pullEvent("mouse_click")
  if osPB == 1 and osPY == 2 and osPX >= 12 and osPX <= 22 then
    if osUserAdmin then
      osFillBG(colors.black)
      term.setBackgroundColor(colors.black)
      term.setTextColor(colors.white)
      print("Enter 'exit' to return to MinifOS")
      shell.run("shell")
      return
    else
      osDrawPerm("Shell")
    end
  else if osPB == 1 and osPY == 3 and osPX >= 12 and osPX <=22 then
    if fs.exists("system/tools/settings") then
      shell.run("system/tools/settings")
      return
    else
      osBSOD("Critical file missing.","/system/tools/settings is missing, and is needed to run.","Please re-install this file")
    end
  else if osPB == 1 and osPY == 4 and osPX >= 12 and osPX <= 22 then
    if fs.exists("system/tools/run") then
      shell.run("system/tools/run")
    else
      osBSOD("Critical file missing.","/system/tools/run is missing, and is needed to run.","Please re-install this file")
    end
  end
  end
  end
end

--Input Events
local function handleClick(button,x,y)
  if button == 1 and y == 1 and x <= 3 then
    osMenuM()
    osDrawAll()
  end
  if button == 1 and y == 1 and x >= 5 and x <=10 then
    osMenuFile()
    osDrawAll()
  end
  if button == 1 and y == 1 and x >= 12 and x <=19 then
    osMenuSystem()
    osDrawAll()
  end
end

local function menuInput()
  osPEvent, osP1, osP2, osP3, osP4, osP5 = os.pullEvent()
  if osPEvent == "mouse_click" then
    handleClick(osP1,osP2,osP3)
  end
end

--Execution

osLoadPrefs()
osDrawAll()
while osRunning do
  menuInput()
end