Module: Zklib::AttendanceManagement

Included in:
Zklib
Defined in:
lib/zklib/attendance_management.rb

Instance Method Summary collapse

Instance Method Details

#clear_attendances ⇒ Object

Clear attendances



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# File 'lib/zklib/attendance_management.rb', line 4

def clear_attendances
  execute_cmd(
    command:        CMD_CLEAR_ATTLOG,
    command_string: '',
  ) do |opts|
    return puts "ERROR: #{options[:error]}" unless opts[:valid]

    data = opts[:data]
    if data.length > 7
      data.split("\u0000").pop
    else
      puts 'ERROR: Invalid clear attendances response'
    end
  end
end

#decode_attendance_data(options) ⇒ Object

Decode attendance data

param options

|_ data  Attendance data to decode



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# File 'lib/zklib/attendance_management.rb', line 24

def decode_attendance_data(options)
  data = options[:data]
  
  {
    uid:       data[0..3].split("\u0000").pop.to_i,
    id:        data[4..7].split("\u0000").pop.to_i,
    state:     BinData::Uint8le.read(data[28]).snapshot,
    timestamp: decode_time(seconds: BinData::Uint32le.read(data[29..-1]).snapshot),
  }
end

#get_attendance_count ⇒ Object

Get attendance list size



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# File 'lib/zklib/attendance_management.rb', line 36

def get_attendance_count
  return 0 if BinData::Uint16le.read(data_recv).snapshot != CMD_PREPARE_DATA

  BinData::Uint32le.read(data_recv[8..-1]).snapshot
end

#get_attendances ⇒ Object

Get attendance list from attendance machine



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# File 'lib/zklib/attendance_management.rb', line 43

def get_attendances
  header = create_header(
    command:        CMD_ATTLOG_RRQ,
    command_string: '',
    checksum:       0,
    session_id:     session_id,
    reply_id:       BinData::Uint16le.read(data_recv[6..-1]).snapshot,
  )

  # Send command
  socket = UDPSocket.new
  socket.bind('0.0.0.0', inport)
  socket.send(header, 0, ip, port)

  ### START Get response size ###
  self.data_recv = receive_nonblock(socket: socket)[0]

  return puts 'ERROR: Empty response' unless data_recv && data_recv.length > 0

  self.session_id = BinData::Uint16le.read(data_recv[3..-1]).snapshot
  total_bytes     = get_attendance_count

  # Stop if attendance list is empty
  if total_bytes <= 0
    socket.close

    return []
  end
  ### END Get response size ###

  ### START Get attendance list ###
  bytes_recv           = 0
  rem                  = nil
  offset               = 0
  attendance_data_size = 40
  trim_first           = 10
  trim_others          = 8
  attendances          = []

  while true
    data = receive_nonblock(socket: socket)[0]

    if bytes_recv == 0
      offset     = trim_first
      bytes_recv = 4
    else
      offset = trim_others
    end

    while(data.length - offset >= attendance_data_size)
      attendance_data  = data[offset..-1]
      offset          += attendance_data_size

      if rem && rem.length > 0
        attendance_data.prepend(rem)
        offset -= rem.length
        rem     = nil
      end

      attendances << decode_attendance_data(data: attendance_data)
      bytes_recv += attendance_data_size

      if bytes_recv == total_bytes
        socket.close

        return attendances
      end
    end

    rem = data[offset..-1]
  end
  ### END Get attendance list ###

  socket.close
end