Class: Presence::Tracker

Inherits:
Object
  • Object
show all
Defined in:
lib/presence/listeners/tracker.rb

Overview

Scanner listener that tracks all MACs found by the scanner. This listener is intended to be used when scanning in a loop. The tracker will maintain a list of MAC addresses on the network and detect when a new client connects or when a connected client disconnects.

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Tracker

Returns a new instance of Tracker.



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# File 'lib/presence/listeners/tracker.rb', line 11

def initialize
  @mac_history = {}
  @current_list = Presence::MACList.new
end

Instance Method Details

#dispatch(event, *args) ⇒ Object 



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# File 'lib/presence/listeners/tracker.rb', line 41

def dispatch(event, *args)
  @scanner.dispatch(event, *args)
end

#listener_registered(l, scanner) ⇒ Object 



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# File 'lib/presence/listeners/tracker.rb', line 16

def listener_registered(l, scanner)
  @scanner ||= scanner
  @scanner.register_listener(@current_list) if l == self
end

#mac_found(ip, mac) ⇒ Object 



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# File 'lib/presence/listeners/tracker.rb', line 21

def mac_found(ip, mac)
  if @mac_history[mac].nil?
    dispatch(:mac_connected, mac, ip)
  elsif @mac_history[mac] != ip
    old_ip = @mac_history[mac]
    dispatch(:mac_changed, mac, old_ip, ip)
  end
  @mac_history[mac] = ip
end

#scan_finished(ip_prefix, range) ⇒ Object 



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# File 'lib/presence/listeners/tracker.rb', line 31

def scan_finished(ip_prefix, range)
  macs_left = @mac_history.keys - @current_list.macs_found.keys
  macs_left.each do |mac|
    old_ip = @mac_history[mac]
    dispatch(:mac_disconnected, mac, old_ip)
    @mac_history.delete(mac)
  end
  @current_list.macs_found.clear
end