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The iCalDate class is well on it's way now.

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This commit is contained in:
Andrew McMillan 2006-12-12 00:41:23 +13:00
parent db108b48de
commit a69862189b
1 changed files with 108 additions and 0 deletions
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108
inc/RRule.php
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@ -163,6 +163,8 @@ class iCalDate {
$this->_dd -= $dim;
}
}
$this->_EpochFromParts();
$this->_TextFromEpoch();
}
@ -179,6 +181,111 @@ class iCalDate {
$this->_mo++;
$this->_dd -= $dim;
}
$this->_EpochFromParts();
$this->_TextFromEpoch();
}
/**
* Add duration
*/
function AddDuration( $duration ) {
list( $sign, $days, $time ) = preg_split( '/[PT]/', $duration );
$sign = ( $sign == "-" ? -1 : 1);
if ( preg_match( '/(\d)+(D|W)/', $days, $matches ) ) {
$days = intval($matches[1]);
if ( $matches[2] == 'W' ) $days *= 7;
$this->AddDays( $days * $sign );
}
if ( preg_match( '/(\d)+(H)/', $time, $matches ) ) $hh = $matches[1];
if ( preg_match( '/(\d)+(M)/', $time, $matches ) ) $mi = $matches[1];
if ( preg_match( '/(\d)+(S)/', $time, $matches ) ) $ss = $matches[1];
$this->_hh += ($hh * $sign);
$this->_mi += ($mi * $sign);
$this->_ss += ($ss * $sign);
if ( $this->_ss < 0 ) { $this->_mi -= (intval(abs($this->ss/60))+1); $this->_ss += ((intval(abs($this->mi/60))+1) * 60); }
if ( $this->_ss > 59) { $this->_mi += (intval(abs($this->ss/60))+1); $this->_ss -= ((intval(abs($this->mi/60))+1) * 60); }
if ( $this->_mi < 0 ) { $this->_hh -= (intval(abs($this->mi/60))+1); $this->_mi += ((intval(abs($this->mi/60))+1) * 60); }
if ( $this->_mi > 59) { $this->_hh += (intval(abs($this->mi/60))+1); $this->_mi -= ((intval(abs($this->mi/60))+1) * 60); }
if ( $this->_hh < 0 ) { $this->AddDays( -1 * (intval(abs($this->_hh/24))+1) ); $this->_hh += ((intval(abs($this->_hh/24))+1)*24); }
if ( $this->_hh > 23) { $this->AddDays( (intval(abs($this->_hh/24))+1) ); $this->_hh -= ((intval(abs($this->_hh/24))+1)*24); }
$this->_EpochFromParts();
$this->_TextFromEpoch();
}
/**
* Produce an iCalendar format DURATION for the difference between this an another iCalDate
*
* @param date $from The start of the period
* @return string The date difference, as an iCalendar duration format
*/
function DateDifference( $from ) {
if ( !is_object($from) ) {
$from = new iCalDate($from);
}
if ( $from->_epoch < $this->_epoch ) {
/** One way to simplify is to always go for positive differences */
return( "-". $from->DateDifference( &$self ) );
}
// if ( $from->_yy == $this->_yy && $from->_mo == $this->_mo ) {
/** Also somewhat simpler if we can use seconds */
$diff = $from->_epoch - $this->_epoch;
$result = "";
if ( $diff > 86400) {
$result = intval($diff / 86400);
$diff = $diff % 86400;
if ( $diff == 0 && (($result % 7) == 0) ) {
$result .= intval($result / 7) . "W";
return $result;
}
$result .= "D";
}
$result = "P".$result."T";
if ( $diff > 3600) {
$result .= intval($diff / 3600) . "H";
$diff = $diff % 3600;
}
if ( $diff > 60) {
$result .= intval($diff / 60) . "M";
$diff = $diff % 60;
}
if ( $diff > 0) {
$result .= intval($diff . "S";
}
return $result;
// }
/**
* From an intense reading of RFC2445 it appears that durations which are not expressible
* in Weeks/Days/Hours/Minutes/Seconds are invalid.
* ==> This code is not needed then :-)
$yy = $from->_yy - $this->_yy;
$mo = $from->_mo - $this->_mo;
$dd = $from->_dd - $this->_dd;
$hh = $from->_hh - $this->_hh;
$mi = $from->_mi - $this->_mi;
$ss = $from->_ss - $this->_ss;
if ( $ss < 0 ) { $mi -= 1; $ss += 60; }
if ( $mi < 0 ) { $hh -= 1; $mi += 60; }
if ( $hh < 0 ) { $dd -= 1; $hh += 24; }
if ( $dd < 0 ) { $mo -= 1; $dd += $this->DaysInMonth(); } // Which will use $this->_(mo|yy) - seemingly sensible
if ( $mo < 0 ) { $yy -= 1; $mo += 12; }
$result = "";
if ( $yy > 0) { $result .= $yy."Y"; }
if ( $mo > 0) { $result .= $mo."M"; }
if ( $dd > 0) { $result .= $dd."D"; }
$result .= "T";
if ( $hh > 0) { $result .= $hh."H"; }
if ( $mi > 0) { $result .= $mi."M"; }
if ( $ss > 0) { $result .= $ss."S"; }
return $result;
*/
}
}
@ -340,6 +447,7 @@ class RRule {
}
}
function GetNext( $after = false ) {
}