Imported Upstream version 0.6.24+dfsg1
This commit is contained in:
Mario Fetka
307
lib/kohana/system/libraries/Calendar_Event.php
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307
lib/kohana/system/libraries/Calendar_Event.php
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<?php defined('SYSPATH') OR die('No direct access allowed.');
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/**
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* Calendar event observer class.
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*
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* $Id: Calendar_Event.php 4129 2009-03-27 17:47:03Z zombor $
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*
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* @package Calendar
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* @author Kohana Team
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* @copyright (c) 2007-2008 Kohana Team
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* @license http://kohanaphp.com/license.html
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*/
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class Calendar_Event_Core extends Event_Observer {
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// Boolean conditions
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protected $booleans = array
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(
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'current',
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'weekend',
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'first_day',
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'last_day',
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'last_occurrence',
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'easter',
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);
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// Rendering conditions
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protected $conditions = array();
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// Cell classes
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protected $classes = array();
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// Cell output
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protected $output = '';
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/**
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* Adds a condition to the event. The condition can be one of the following:
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*
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* timestamp - UNIX timestamp
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* day - day number (1-31)
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* week - week number (1-5)
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* month - month number (1-12)
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* year - year number (4 digits)
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* day_of_week - day of week (1-7)
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* current - active month (boolean) (only show data for the month being rendered)
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* weekend - weekend day (boolean)
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* first_day - first day of month (boolean)
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* last_day - last day of month (boolean)
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* occurrence - occurrence of the week day (1-5) (use with "day_of_week")
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* last_occurrence - last occurrence of week day (boolean) (use with "day_of_week")
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* easter - Easter day (boolean)
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* callback - callback test (boolean)
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*
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* To unset a condition, call condition with a value of NULL.
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*
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* @chainable
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* @param string condition key
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* @param mixed condition value
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* @return object
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*/
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public function condition($key, $value)
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{
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if ($value === NULL)
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{
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unset($this->conditions[$key]);
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}
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else
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{
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if ($key === 'callback')
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{
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// Do nothing
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}
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elseif (in_array($key, $this->booleans))
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{
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// Make the value boolean
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$value = (bool) $value;
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}
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else
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{
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// Make the value an int
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$value = (int) $value;
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}
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$this->conditions[$key] = $value;
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}
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return $this;
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}
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/**
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* Add a CSS class for this event. This can be called multiple times.
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*
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* @chainable
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* @param string CSS class name
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* @return object
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*/
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public function add_class($class)
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{
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$this->classes[$class] = $class;
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return $this;
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}
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/**
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* Remove a CSS class for this event. This can be called multiple times.
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*
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* @chainable
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* @param string CSS class name
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* @return object
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*/
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public function remove_class($class)
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{
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unset($this->classes[$class]);
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return $this;
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}
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/**
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* Set HTML output for this event.
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*
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* @chainable
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* @param string HTML output
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* @return object
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*/
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public function output($str)
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{
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$this->output = $str;
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return $this;
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}
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/**
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* Add a CSS class for this event. This can be called multiple times.
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*
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* @chainable
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* @param string CSS class name
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* @return object
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*/
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public function notify($data)
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{
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// Split the date and current status
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list ($month, $day, $year, $week, $current) = $data;
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// Get a timestamp for the day
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$timestamp = mktime(0, 0, 0, $month, $day, $year);
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// Date conditionals
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$condition = array
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(
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'timestamp' => (int) $timestamp,
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'day' => (int) date('j', $timestamp),
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'week' => (int) $week,
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'month' => (int) date('n', $timestamp),
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'year' => (int) date('Y', $timestamp),
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'day_of_week' => (int) date('w', $timestamp),
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'current' => (bool) $current,
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);
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// Tested conditions
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$tested = array();
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foreach ($condition as $key => $value)
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{
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// Timestamps need to be handled carefully
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if($key === 'timestamp' AND isset($this->conditions['timestamp']))
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{
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// This adds 23 hours, 59 minutes and 59 seconds to today's timestamp, as 24 hours
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// is classed as a new day
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$next_day = $timestamp + 86399;
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if($this->conditions['timestamp'] < $timestamp OR $this->conditions['timestamp'] > $next_day)
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return FALSE;
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}
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// Test basic conditions first
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elseif (isset($this->conditions[$key]) AND $this->conditions[$key] !== $value)
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return FALSE;
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// Condition has been tested
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$tested[$key] = TRUE;
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}
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if (isset($this->conditions['weekend']))
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{
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// Weekday vs Weekend
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$condition['weekend'] = ($condition['day_of_week'] === 0 OR $condition['day_of_week'] === 6);
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}
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if (isset($this->conditions['first_day']))
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{
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// First day of month
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$condition['first_day'] = ($condition['day'] === 1);
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}
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if (isset($this->conditions['last_day']))
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{
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// Last day of month
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$condition['last_day'] = ($condition['day'] === (int) date('t', $timestamp));
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}
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if (isset($this->conditions['occurrence']))
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{
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// Get the occurance of the current day
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$condition['occurrence'] = $this->day_occurrence($timestamp);
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}
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if (isset($this->conditions['last_occurrence']))
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{
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// Test if the next occurance of this date is next month
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$condition['last_occurrence'] = ((int) date('n', $timestamp + 604800) !== $condition['month']);
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}
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if (isset($this->conditions['easter']))
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{
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if ($condition['month'] === 3 OR $condition['month'] === 4)
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{
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// This algorithm is from Practical Astronomy With Your Calculator, 2nd Edition by Peter
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// Duffett-Smith. It was originally from Butcher's Ecclesiastical Calendar, published in
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// 1876. This algorithm has also been published in the 1922 book General Astronomy by
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// Spencer Jones; in The Journal of the British Astronomical Association (Vol.88, page
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// 91, December 1977); and in Astronomical Algorithms (1991) by Jean Meeus.
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$a = $condition['year'] % 19;
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$b = (int) ($condition['year'] / 100);
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$c = $condition['year'] % 100;
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$d = (int) ($b / 4);
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$e = $b % 4;
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$f = (int) (($b + 8) / 25);
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$g = (int) (($b - $f + 1) / 3);
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$h = (19 * $a + $b - $d - $g + 15) % 30;
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$i = (int) ($c / 4);
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$k = $c % 4;
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$l = (32 + 2 * $e + 2 * $i - $h - $k) % 7;
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$m = (int) (($a + 11 * $h + 22 * $l) / 451);
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$p = ($h + $l - 7 * $m + 114) % 31;
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$month = (int) (($h + $l - 7 * $m + 114) / 31);
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$day = $p + 1;
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$condition['easter'] = ($condition['month'] === $month AND $condition['day'] === $day);
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}
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else
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{
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// Easter can only happen in March or April
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$condition['easter'] = FALSE;
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}
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}
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if (isset($this->conditions['callback']))
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{
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// Use a callback to determine validity
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$condition['callback'] = call_user_func($this->conditions['callback'], $condition, $this);
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}
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$conditions = array_diff_key($this->conditions, $tested);
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foreach ($conditions as $key => $value)
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{
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if ($key === 'callback')
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{
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// Callbacks are tested on a TRUE/FALSE basis
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$value = TRUE;
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}
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// Test advanced conditions
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if ($condition[$key] !== $value)
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return FALSE;
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}
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$this->caller->add_data(array
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(
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'classes' => $this->classes,
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'output' => $this->output,
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));
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}
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/**
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* Find the week day occurrence for a specific timestamp. The occurrence is
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* relative to the current month. For example, the second Saturday of any
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* given month will return "2" as the occurrence. This is used in combination
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* with the "occurrence" condition.
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*
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* @param integer UNIX timestamp
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* @return integer
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*/
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protected function day_occurrence($timestamp)
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{
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// Get the current month for the timestamp
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$month = date('m', $timestamp);
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// Default occurrence is one
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$occurrence = 1;
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// Reduce the timestamp by one week for each loop. This has the added
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// benefit of preventing an infinite loop.
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while ($timestamp -= 604800)
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{
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if (date('m', $timestamp) !== $month)
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{
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// Once the timestamp has gone into the previous month, the
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// proper occurrence has been found.
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return $occurrence;
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}
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// Increment the occurrence
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$occurrence++;
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}
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}
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} // End Calendar Event
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