/* 
File:	 phone.cp
Author:	R. P. Futrelle
Date:	 8/1/98
Notice:	Copyright 1998 by R. P. Futrelle and the College of Computer Science,
		Northeastern University
Class:  COM1204, Object-Oriented Design, Summer 1998.
Proj:	 PS2.µ Metrowerks Code Warrior Mac. Done in IDE version 2.0.1.
Purpose: Phone class methods defined.
						

Modification history:
8/1/98:	RPF. Started.

*/

#include "includes.h"

int Phone::next_id = 0;

Phone::
Phone(int num)
	: p_number(num), pickup_timer(new Timer), hangup_timer(new Timer),
		answered(false), dialing(false), me(false), 
		picked_up(false), sound(false) {
	id = next_id++;
	}

bool Phone::
is_state(bool A, bool D, bool M, bool P, bool S) {
	return((answered == A) && (dialing == D) && (me == M) && 
					(picked_up == P) && (sound == S));
	}

void Phone::
set_state(bool A, bool D, bool M, bool P, bool S) {
	answered = A;
	dialing = D;
	me = M;
	picked_up = P;
	sound = S;
	}
	
void Phone::
run() {
	do_states();
	}
	
void Phone::
do_states() {
// Succesively check states and respond to messages

// State: Quiescent = FFFFF = false, false, false, false, false
	if(is_state(false, false, false, false, false))
		{
		if(!pickup_timer->is_on()) pickup_timer->start(5,12);
		if(pickup_timer->rang()) {
			pickup_timer->shut_off();
			pickup_ph();
			set_state(false, false, true, true, false);	// picked up
			cout << "picked up phone: " << id <<  " at " << sys->time << endl;
			return;
			}
		}

// State: Picked Up = FFTTF = false, false, true, true, false
	if(is_state(false, false, true, true, false))
		{
		if(!hangup_timer->is_on()) hangup_timer->start(3,6);
		if(hangup_timer->rang()) {
			hangup_timer->shut_off();
			hangup_ph();
			set_state(false, false, false, false, false);	// hung up
			cout << "hung up phone: " << id << " at " << sys->time << endl;
		return;
		}
	}
	}

// note that in messages from phones, the source number for the phone 
// is not given, since the switch knows which phone is which. 
//		(this will be different for cell phones)

void Phone::
pickup_ph() {
	// create a pickup packet and place in the  
	// packet slot of the wire in connector out
	connector->out->packet = new Packet(pickup, null_string, -1, -1, -1); 
} 

void Phone::
hangup_ph() {
	// similar to pickup
	// create a hangup packet and place in the  
	// packet slot of the wire in connector out
	connector->out->packet = new Packet(hangup, null_string, -1, -1, -1); 
}