SSE Login

tColors = {
  ["m_bg"] = colors.white,
  ["m_text"] = colors.black,
  ["t_bg"] = colors.blue,
  ["t_text"] = colors.white,
  ["b1_bg"] = colors.cyan,
  ["b2_bg"] = colors.cyan,
  ["b3_bg"] = colors.green,
  ["b_text"] = colors.white
}

tButton = {
  ["b1_x"] = 4,
  ["b1_y"] = 4,
  ["b1_w"] = 20,
  ["b1_h"] = 4,
  ["b1_text"] = "Username",
  ["b2_x"] = 4,
  ["b2_y"] = 10,
  ["b2_w"] = 20,
  ["b2_h"] = 4,
  ["b2_text"] = "Password",
  ["b3_x"] = 4,
  ["b3_y"] = 16,
  ["b3_w"] = 9,
  ["b3_h"] = 3,
  ["b3_text"] = "Login",
}

userInput = ""
passInput = ""
passInputN = ""
bRunning = true

function drawBox(x,y,w,h,cb,ct,text,ce,extra)
  term.setBackgroundColor(cb)
  term.setTextColor(ct)
  term.setCursorPos(x,y)
  for i=1,h do
    for i=1,w do
      write(" ")
    end
    term.setCursorPos(x,y+i)
  end
  if h == 2 or h == 4 or h == 6 or h == 8 or h == 10 then
    term.setCursorPos(x+(w/2)-(#text/2),y+(h/2)-1)
  else
    term.setCursorPos(x+(w/2)-(#text/2),y+(h/2))
  end
  print(text)
  term.setCursorPos(x+(w/2)-(#extra/2),y+(h/2)+1)
  term.setTextColor(ce)
  print(extra)
end

function dispSuccess()
  drawBox(tButton["b3_x"],tButton["b3_y"],17,tButton["b3_h"],colors.lime,tColors["b_text"],"Access Granted",tColors["b_text"],"")
  sleep(1)
  bRunning = false
end

function dispFailure()
  drawBox(tButton["b3_x"],tButton["b3_y"],17,tButton["b3_h"],colors.red,tColors["b_text"],"Access Denied",tColors["b_text"],"")
  sleep(1)
  drawBox(tButton["b3_x"],tButton["b3_y"],tButton["b3_w"],tButton["b3_h"],tColors["b3_bg"],tColors["b_text"],tButton["b3_text"],tColors["b_text"],"")
end

function redraw()
  term.setBackgroundColor(tColors["m_bg"])
  term.clear()
  term.setCursorPos(2,2)
  term.setBackgroundColor(tColors["t_bg"])
  term.clearLine()
  term.setCursorPos(2,2)
  term.setTextColor(tColors["t_text"])
  term.setBackgroundColor(tColors["t_bg"])
  print("Security System Example")
  drawBox(tButton["b1_x"],tButton["b1_y"],tButton["b1_w"],tButton["b1_h"],tColors["b1_bg"],tColors["b_text"],tButton["b1_text"],colors.lightGray,userInput)
  drawBox(tButton["b2_x"],tButton["b2_y"],tButton["b2_w"],tButton["b2_h"],tColors["b2_bg"],tColors["b_text"],tButton["b2_text"],colors.lightGray,passInputN)
  drawBox(tButton["b3_x"],tButton["b3_y"],tButton["b3_w"],tButton["b3_h"],tColors["b3_bg"],tColors["b_text"],tButton["b3_text"],colors.lightGray,"")
end

function checkCreds()
    local success = false
    if fs.exists("/sse/.users/."..userInput) then
      local userFile = fs.open("/sse/.users/."..userInput,"r")
      local userFile_pass = userFile.readLine()
      if userFile_pass == passInput then
        success = true
      end
      userFile.close()
    end
    if success == false then
        return false
    else
        return true
    end
end


redraw()
while bRunning do
  local event, button, X, Y = os.pullEvent()
  if event == "mouse_click" then
    if button == 1 then
      if X >= tButton["b1_x"] and X <= (tButton["b1_x"] + tButton["b1_w"] - 1) and Y >= tButton["b1_y"] and Y <= (tButton["b1_y"] + tButton["b1_h"] - 1) then
        term.setTextColor(colors.lightGray)
        term.setBackgroundColor(colors.gray)
        term.setCursorPos(tButton["b1_x"]+1,tButton["b1_y"]+tButton["b1_h"]-2)
        print("                  ")
        term.setCursorPos(tButton["b1_x"]+1,tButton["b1_y"]+tButton["b1_h"]-2)
        userInput = read()
        redraw()
      elseif X >= tButton["b2_x"] and X <= (tButton["b2_x"] + tButton["b2_w"] - 1) and Y >= tButton["b2_y"] and Y <= (tButton["b2_y"] + tButton["b2_h"] - 1) then
        passInputN = ""
        term.setTextColor(colors.lightGray)
        term.setBackgroundColor(colors.gray)
        term.setCursorPos(tButton["b2_x"]+1,tButton["b2_y"]+tButton["b2_h"]-2)
        print("                  ")
        term.setCursorPos(tButton["b2_x"]+1,tButton["b2_y"]+tButton["b2_h"]-2)
        passInput = read("*")
        for i=1,#passInput do
          passInputN = passInputN .. "*"
        end
        redraw()
      elseif X >= tButton["b3_x"] and X <= (tButton["b3_x"] + tButton["b3_w"] - 1) and Y >= tButton["b3_y"] and Y <= (tButton["b3_y"] + tButton["b3_h"] - 1) then
        local bReturned = checkCreds()
        if bReturned == true then
          dispSuccess()
        else
          dispFailure()
          redraw()
        end
      end
    end
  end
end

term.setBackgroundColor(colors.black)
term.clear()
term.setCursorPos(1,1)
term.setTextColor(colors.yellow)
print(os.version())