apps/nekos/helpers/login.lua

return function(a,u)
  local helper = { App = a, Conns = {}, User = u }
  function helper:connect(e,c,t) self.Conns[#self.Conns+1]=self.App:connect(e,c,t or self) end
  function helper:destroy() for i,conn in ipairs(self.Conns) do self.App:disconnect(conn) end end
  function helper:build()
    self.Input = { Value = "", Index = 0, Line = 2 }
    self.User()
    term.setCursorBlink(true)
    term.setTextColor(system:getTextColor())
    term.setBackgroundColor(system:getBackgroundColor())
    term.setCursorPos(1,1)
    term.clear()
    term.write("Username > ")
    term.write(self.User.Username)
    self:connect("char",self.handleInput)
    self:connect("paste",self.handleInput)
    self:connect("key",self.handleKeyPressed)
    self:connect("timer",self.handleTimer)
    self.Timer = os.startTimer(0.25)
  end

  function helper:draw()
    term.setCursorPos(1,self.Input.Line)
    term.clearLine()
    term.write("Password > ")
    local x,_ = term.getCursorPos()
    term.write(string.gsub(self.Input.Value,".","*"))
    term.setCursorPos(x+self.Input.Index,self.Input.Line)
  end

  function helper:handleTimer(c)
    if c ~= self.Timer then return end
    shell.switchTab(1)
    self.Timer = os.startTimer(0.25)
  end

  function helper:handleInput(c)
    if not c then return
    elseif type(c) == "number" then
      local p = self.Input.Index + c
      self.Input.Value = string.sub(self.Input.Value,1,p-1)..string.sub(self.Input.Value,p+1,-1)
      if c <= 0 then self:moveCursor(c-1) end
    else
      self.Input.Value = string.sub(self.Input.Value,1,self.Input.Index)..c..string.sub(self.Input.Value,self.Input.Index+1,-1)
      self:moveCursor(string.len(c))
    end
  end

  function helper:processInput()
    self.Input.Index = 0
    self:draw()
    term.setCursorBlink(false)
    term.setCursorPos(1,self.Input.Line+1)
    if md5:hash(self.Input.Value) == self.User.Password then
      self.App:activate("menu")
      return
    end
    term.write("Incorrect Password.")
    self.Input.Value = ""
    term.setCursorBlink(true)
  end

  function helper:moveCursor(c)
    self.Input.Index = self.Input.Index + c
    local l = string.len(self.Input.Value)
    if self.Input.Index < 0 then self.Input.Index = 0
    elseif self.Input.Index > l then self.Input.Index = l
    end
  end

  function helper:handleKeyPressed(key, held)
    if key == keys.backspace then self:handleInput(0)
    elseif key == keys.delete then self:handleInput(1)
    elseif not held then
      if key == keys.enter then self:processInput()
      elseif key == keys.left then self:moveCursor(-1)
      elseif key == keys.right then self:moveCursor(1)
      end
    end
  end

  return helper
end