// This file contains functions for manipulating a single reservation, called
// a "time_slot".

#include <iostream.h>
#include <stdio.h>
#include <string.h>
#include <time.h>
#include "debug.h"
#include "errors.h"
#include "time_slot.h"




time_slot::time_slot()
  {

#ifdef FBFC_DEBUG
cerr << "\ninside default constructor time_slot\n";
#endif
  slot_unique_id = 0;
  name[0] = '\0';
  start = 0;
  finish = 0;
  }




time_slot::time_slot(const time_slot_info new_info)
  {

#ifdef FBFC_DEBUG
cerr << "\ninside constructor time_slot\n";
cerr << "    slot_unique_id=" << new_info.slot_unique_id << endl;
cerr << "    name=" << new_info.name << endl;
cerr << "    start=" << new_info.start << endl;
cerr << "    finish=" << new_info.finish << endl;
#endif

  slot_unique_id = new_info.slot_unique_id;

  strcpy(name, new_info.name);

  start = new_info.start;
  finish = new_info.finish;
  if (finish < start)
    { 

    // no way to gracefully recover from an error in a constructor

    strcpy(fatal_err_function, "time_slot::time_slot");
    sprintf(fatal_err_msg, "time_in=%d time_out=%d", start, finish); 
    fatal_error();
    }
  }




time_slot::~time_slot()
  {

#ifdef FBFC_DEBUG
cerr << "\ninside destructor time_slot\n";
cerr << "    slot_unique_id=" << slot_unique_id << endl;
cerr << "    name=" << name << endl;
cerr << "    start=" << start << endl;
cerr << "    finish=" << finish << endl;
#endif
  }




time_slot_info time_slot::get()
  {
  time_slot_info info;

  info.slot_unique_id = slot_unique_id;
  strcpy(info.name, name);
  info.start = start;
  info.finish = finish;
  return info;
  }




int time_slot::update(const time_slot_info new_info)
  {
  int outcome = SUCCESSFUL;
  time_t t1, t2;

  // first, a little error checking

  if (new_info.start != 0)
    t1 = new_info.start;
  else
    t1 = start;
  if (new_info.finish != 0)
    t2 = new_info.finish;
  else
    t2 = finish;
  if (t2 < t1)
    { outcome = T_S_ERR_START_FINISH; }
  else
    {

    // load up the class with the new info values

    if (new_info.slot_unique_id != 0)
      slot_unique_id = new_info.slot_unique_id;

    if (new_info.name[0] != '\0')
      {
      strcpy(name, new_info.name);
      }

    if (new_info.start != 0)
      start = new_info.start;
    if (new_info.finish != 0)
      finish = new_info.finish;
    }
  return outcome;
  }