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<?php
/**
* @package SPLIB
* @version $Id: Week.php,v 1.1 2003/12/12 08:06:07 kevin Exp $
*/
/**
* Define include path and include required files
*/
@define('CALENDAR_PATH','DateTime/');
require_once(CALENDAR_PATH.'DateMath.php');
require_once(CALENDAR_PATH.'Calendar.php');
/**
* Represents a Week and builds Days<br />
* <b>Note:</b> days may be "empty" if the Week
* is the first of last of the month.<br />
* <b>Note:</b> requires the DateMath class be declared<br />
* <b>Note:</b> the timestamp for a Week will the same as the first
* day in that week.
* <code>
* $week = new Week(2003,8,1); // First week in August 2003
* $week->build();
* while ( $day = $week->fetch() ) {
* if ( $day->isEmpty() )
* echo ( ' ' );
* else
* echo ( $day->thisDay() );
* }
* </code>
* @package SPLIB
*/
class Week extends Calendar
{
/**
* Stores the numeric value of this week relative to others in the month
* @access private
* @var object
*/
var $thisWeek;
/**
* Stores an instance of DateMath
* @access private
* @var DateMath
*/
var $dateMath;
/**
* First day of the week
* @access private
* @var string
*/
var $firstDay;
/**
* The seven days of the week named
* @access private
* @var array
*/
var $weekDayNames;
/**
* Days of the week ordered with $firstDay at the beginning
* @access private
* @var array
*/
var $daysOfWeek = array();
/**
* Number of weeks in the month
* @access private
* @var array
*/
var $numWeeks;
/**
* Constructs Week
* @param int year e.g. 2003
* @param int month e.g. 5
* @param int week of month e.g. 3
* @param string first day of the week e.g. Monday (optional)
* @access public
*/
function Week($y,$m,$w,$firstDay='Monday')
{
Calendar::Calendar($y,$m);
$this->firstDay=$firstDay;
$this->weekDayNames = array(
'Monday', 'Tuesday', 'Wednesday', 'Thursday',
'Friday', 'Saturday', 'Sunday');
$this->dateMath = new DateMath($this->year,$this->month,1,0,0,0);
$this->setFirstDay();
$this->setNumWeeks();
if ( $w < 1 || $w > $this->numWeeks ) {
trigger_error('Week::Week week '.$w.' is invalid');
} else {
$this->thisWeek = $w;
}
}
/**
* Constructs $this->daysOfWeek based on $this->firstDay
* @return void
* @access private
*/
function setFirstDay()
{
$endDays = array();
$tmpDays = array();
$begin = false;
foreach ( $this->weekDayNames as $day ) {
if ( $begin == true ) {
$endDays[] = $day;
} else if ( $day == $this->firstDay ) {
$begin = true;
$endDays[] = $day;
} else {
$tmpDays[] = $day;
}
}
$this->daysOfWeek = array_merge($endDays, $tmpDays);
}
/**
* Constructs $this->daysOfMonth
* @return void
* @access private
*/
function setNumWeeks()
{
$daysInMonth = $this->dateMath->daysInMonth();
$start=0;
foreach ( $this->daysOfWeek as $dayOfWeek ) {
if ( $this->dateMath->firstDayInMonth() == $dayOfWeek ) {
break;
}
$start++;
}
$this->numWeeks = ceil(($daysInMonth + $start)/7);
}
/**
* Builds Day objects for this Week
* @param array of Day or Week objs representing selected dates (optional)
* @return boolean
* @access public
*/
function build($sDates = array())
{
require_once(CALENDAR_PATH.'Day.php');
foreach ( $this->daysOfWeek as $key => $dayOfWeek ) {
if ( $this->dateMath->firstDayInMonth() == $dayOfWeek ) {
$offset = $key;
break;
}
}
if ( $this->thisWeek == 1 ) {
$start = false;
$day = 1;
for ( $i=1;$i<=7;$i++ ) {
if ( !$start && $i > $offset ) {
$start = true;
}
if ( $start ) {
$this->children[$i] =
new Day($this->year, $this->month, $day);
$day++;
} else {
$this->children[$i] =
new Day($this->year, $this->month, 1);
$this->children[$i]->setEmpty();
}
$this->selectDay($sDates,$i);
}
} else if ( $this->thisWeek == $this->numWeeks ) {
$end = false;
for ( $i=1;$i<=7;$i++ ) {
$day = ($this->thisWeek - 1) * 7 + ($i-$offset);
if ( !$end && $this->dateMath->daysInMonth() < $day ) {
$end = true;
}
if ( ! $end ) {
$this->children[$i] =
new Day($this->year, $this->month, $day);
} else {
$this->children[$i] =
new Day($this->year, $this->month, 1);
$this->children[$i]->setEmpty();
}
$this->selectDay($sDates,$i);
}
} else {
// Does not take into account offset...
for ( $i=1;$i<=7;$i++ ) {
$day = ($this->thisWeek - 1) * 7 + ($i-$offset);
$this->children[$i] =
new Day($this->year, $this->month, $day);
$this->selectDay($sDates,$i);
}
}
return true;
}
/**
* Week::build() delegates Day selection to seperate method
* @param array of Day or Week objs representing selected dates (optional)
* @param int index of child object to test
* @return boolean
* @access private
*/
function selectDay($sDates,$index) {
foreach ( $sDates as $sDate ) {
if ( $this->year == $sDate->thisYear()
&& $this->month == $sDate->thisMonth()
&& $this->children[$index]->thisDay() == $sDate->thisDay() )
$this->children[$index]->setSelected();
}
}
/**
* Gets the numeric value of the previous week in the month
* or false if this is the first week of the month
* @return mixed
* @access public
*/
function lastWeek() {
$lastWeek = $this->thisWeek - 1;
return ( $lastWeek > 0 ? $lastWeek : false );
}
/**
* Gets the numeric value of the week in the month
* @return int
* @access public
*/
function thisWeek() {
return $this->thisWeek;
}
/**
* Gets the numeric value of the next week in the month
* or false if this is the last week of the month
* @return mixed
* @access public
*/
function nextWeek() {
$nextWeek = $this->thisWeek + 1;
return ( $nextWeek <= $this->numWeeks ? $nextWeek : false );
}
/**
* Returns a timestamp from the current date / time values<br />
* <b>Note:</b> overrides parent method as Week must determine
* the first day in the collection.<br />
* <b>Note:</b> calling this method also
* calls the build() method, if it has not already called.
* @return int Unix timestamp
* @access public
*/
function getTimestamp()
{
if ( !count ( $this->children ) > 0 )
$this->build();
$this->day = $this->children[1]->thisDay();
return mktime($this->hour, $this->minute ,$this->second,
$this->month ,$this->day ,$this->year);
}
}
?>
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