[3733] | 1 | <?php |
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| 2 | /** |
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| 3 | * Class for parsing RRule and getting us the dates |
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| 4 | * |
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| 5 | * @package awl |
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| 6 | * @subpackage caldav |
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| 7 | * @author Andrew McMillan <andrew@mcmillan.net.nz> |
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| 8 | * @copyright Morphoss Ltd |
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| 9 | * @license http://gnu.org/copyleft/gpl.html GNU GPL v2 or later |
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| 10 | */ |
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| 11 | |
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| 12 | if ( !class_exists('DateTime') ) return; |
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| 13 | |
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| 14 | $rrule_expand_limit = array( |
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| 15 | 'YEARLY' => array( 'bymonth' => 'expand', 'byweekno' => 'expand', 'byyearday' => 'expand', 'bymonthday' => 'expand', |
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| 16 | 'byday' => 'expand', 'byhour' => 'expand', 'byminute' => 'expand', 'bysecond' => 'expand' ), |
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| 17 | 'MONTHLY' => array( 'bymonth' => 'limit', 'bymonthday' => 'expand', |
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| 18 | 'byday' => 'expand', 'byhour' => 'expand', 'byminute' => 'expand', 'bysecond' => 'expand' ), |
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| 19 | 'WEEKLY' => array( 'bymonth' => 'limit', |
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| 20 | 'byday' => 'expand', 'byhour' => 'expand', 'byminute' => 'expand', 'bysecond' => 'expand' ), |
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| 21 | 'DAILY' => array( 'bymonth' => 'limit', 'bymonthday' => 'limit', |
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| 22 | 'byday' => 'limit', 'byhour' => 'expand', 'byminute' => 'expand', 'bysecond' => 'expand' ), |
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| 23 | 'HOURLY' => array( 'bymonth' => 'limit', 'bymonthday' => 'limit', |
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| 24 | 'byday' => 'limit', 'byhour' => 'limit', 'byminute' => 'expand', 'bysecond' => 'expand' ), |
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| 25 | 'MINUTELY'=> array( 'bymonth' => 'limit', 'bymonthday' => 'limit', |
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| 26 | 'byday' => 'limit', 'byhour' => 'limit', 'byminute' => 'limit', 'bysecond' => 'expand' ), |
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| 27 | 'SECONDLY'=> array( 'bymonth' => 'limit', 'bymonthday' => 'limit', |
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| 28 | 'byday' => 'limit', 'byhour' => 'limit', 'byminute' => 'limit', 'bysecond' => 'limit' ), |
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| 29 | ); |
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| 30 | |
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| 31 | $rrule_day_numbers = array( 'SU' => 0, 'MO' => 1, 'TU' => 2, 'WE' => 3, 'TH' => 4, 'FR' => 5, 'SA' => 6 ); |
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| 32 | |
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| 33 | $GLOBALS['debug_rrule'] = false; |
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| 34 | // $GLOBALS['debug_rrule'] = true; |
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| 35 | |
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| 36 | /** |
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| 37 | * Wrap the DateTimeZone class to allow parsing some iCalendar TZID strangenesses |
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| 38 | */ |
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| 39 | class RepeatRuleTimeZone extends DateTimeZone { |
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| 40 | private $tz_defined; |
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| 41 | |
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| 42 | public function __construct($dtz = null) { |
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| 43 | $this->tz_defined = false; |
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| 44 | if ( !isset($dtz) ) return; |
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| 45 | |
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| 46 | $dtz = olson_from_tzstring($dtz); |
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| 47 | |
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| 48 | try { |
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| 49 | parent::__construct($dtz); |
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| 50 | $this->tz_defined = $dtz; |
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| 51 | } |
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| 52 | catch (Exception $e) { |
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| 53 | $original = $dtz; |
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| 54 | |
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| 55 | if ( !isset($dtz) ) { |
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| 56 | dbg_error_log( 'ERROR', 'Could not parse timezone "%s" - will use floating time', $original ); |
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| 57 | $dtz = new DateTimeZone('UTC'); |
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| 58 | $this->tz_defined = false; |
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| 59 | } |
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| 60 | } |
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| 61 | } |
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| 62 | |
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| 63 | function tzid() { |
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| 64 | if ( $this->tz_defined === false ) return false; |
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| 65 | $tzid = $this->getName(); |
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| 66 | if ( $tzid != 'UTC' ) return $tzid; |
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| 67 | return $this->tz_defined; |
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| 68 | } |
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| 69 | } |
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| 70 | |
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| 71 | |
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| 72 | /** |
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| 73 | * Wrap the DateTime class to make it friendlier to passing in random strings from iCalendar |
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| 74 | * objects, and especially the random stuff used to identify timezones. We also add some |
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| 75 | * utility methods and stuff too, in order to simplify some of the operations we need to do |
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| 76 | * with dates. |
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| 77 | */ |
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| 78 | class RepeatRuleDateTime extends DateTime { |
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| 79 | // public static $Format = 'Y-m-d H:i:s'; |
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| 80 | public static $Format = 'c'; |
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| 81 | private $tzid; |
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| 82 | private $is_date; |
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| 83 | |
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| 84 | public function __construct($date = null, $dtz = null) { |
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| 85 | $this->is_date = false; |
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| 86 | if ( !isset($date) ) return; |
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| 87 | |
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| 88 | if ( preg_match('{;?VALUE=DATE[:;]}', $date, $matches) ) $this->is_date = true; |
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| 89 | elseif ( preg_match('{:([12]\d{3}) (0[1-9]|1[012]) (0[1-9]|[12]\d|3[01]Z?) $}x', $date, $matches) ) $this->is_date = true; |
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| 90 | if (preg_match('/;?TZID=([^:]+).*:(\d{8}(T\d{6})?)(Z)?/', $date, $matches) ) { |
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| 91 | if ( isset($matches[4]) && $matches[4] == 'Z' ) { |
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| 92 | $dtz = new RepeatRuleTimeZone('UTC'); |
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| 93 | $this->tzid = 'UTC'; |
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| 94 | } |
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| 95 | else if ( isset($matches[1]) && $matches[1] != '' ) { |
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| 96 | $dtz = new RepeatRuleTimeZone($matches[1]); |
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| 97 | $this->tzid = $dtz->tzid(); |
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| 98 | } |
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| 99 | else { |
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| 100 | $dtz = new RepeatRuleTimeZone('UTC'); |
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| 101 | $this->tzid = null; |
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| 102 | } |
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| 103 | } |
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| 104 | elseif( $dtz === null || $dtz == '' ) { |
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| 105 | $dtz = new RepeatRuleTimeZone('UTC'); |
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| 106 | if ( preg_match('/(\d{8}(T\d{6})?)Z/', $date, $matches) ) { |
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| 107 | if ( strlen($matches[1]) == 8 ) $this->is_date = true; |
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| 108 | $this->tzid = 'UTC'; |
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| 109 | } |
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| 110 | else { |
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| 111 | $this->tzid = null; |
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| 112 | } |
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| 113 | } |
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| 114 | elseif ( is_string($dtz) ) { |
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| 115 | $dtz = new RepeatRuleTimeZone($dtz); |
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| 116 | $this->tzid = $dtz->tzid(); |
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| 117 | } |
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| 118 | else { |
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| 119 | $this->tzid = $dtz->getName(); |
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| 120 | } |
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| 121 | |
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| 122 | parent::__construct($date, $dtz); |
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| 123 | |
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| 124 | return $this; |
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| 125 | } |
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| 126 | |
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| 127 | |
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| 128 | public function __toString() { |
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| 129 | return (string)parent::format(self::$Format) . ' ' . parent::getTimeZone()->getName(); |
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| 130 | } |
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| 131 | |
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| 132 | |
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| 133 | public function AsDate() { |
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| 134 | return $this->format('Ymd'); |
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| 135 | } |
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| 136 | |
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| 137 | |
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| 138 | public function modify( $interval ) { |
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| 139 | if ( preg_match('{^(-)?P((\d+)W)?((\d+)D)?T?((\d+)H)?((\d+)M)?((\d+)S)?$}', $interval, $matches) ) { |
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| 140 | $minus = $matches[1]; |
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| 141 | $interval = ''; |
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| 142 | if ( isset($matches[2]) && $matches[2] != '' ) $interval .= $minus . $matches[3] . ' weeks '; |
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| 143 | if ( isset($matches[4]) && $matches[4] != '' ) $interval .= $minus . $matches[5] . ' days '; |
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| 144 | if ( isset($matches[6]) && $matches[6] != '' ) $interval .= $minus . $matches[7] . ' hours '; |
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| 145 | if ( isset($matches[8]) && $matches[8] != '' ) $interval .= $minus . $matches[9] . ' minutes '; |
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| 146 | if (isset($matches[10]) &&$matches[10] != '' ) $interval .= $minus . $matches[11] . ' seconds '; |
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| 147 | } |
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| 148 | // printf( "Modify '%s' by: >>%s<<\n", $this->__toString(), $interval ); |
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| 149 | // print_r($this); |
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| 150 | if ( !isset($interval) || $interval == '' ) $interval = '1 day'; |
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| 151 | parent::modify($interval); |
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| 152 | return $this->__toString(); |
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| 153 | } |
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| 154 | |
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| 155 | |
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| 156 | public function UTC() { |
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| 157 | $gmt = clone($this); |
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| 158 | if ( isset($this->tzid) && $this->tzid != 'UTC' ) { |
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| 159 | $dtz = parent::getTimezone(); |
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| 160 | $offset = 0 - $dtz->getOffset($gmt); |
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| 161 | $gmt->modify( $offset . ' seconds' ); |
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| 162 | } |
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| 163 | if ( $this->is_date ) return $gmt->format('Ymd'); |
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| 164 | return $gmt->format('Ymd\THis\Z'); |
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| 165 | } |
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| 166 | |
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| 167 | |
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| 168 | public function RFC5545() { |
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| 169 | $result = ''; |
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| 170 | if ( isset($this->tzid) && $this->tzid != 'UTC' ) { |
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| 171 | $result = ';TZID='.$this->tzid; |
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| 172 | } |
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| 173 | if ( $this->is_date ) { |
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| 174 | $result .= ';VALUE=DATE:' . $this->format('Ymd'); |
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| 175 | } |
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| 176 | else { |
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| 177 | $result .= ':' . $this->format('Ymd\THis'); |
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| 178 | if ( isset($this->tzid) && $this->tzid == 'UTC' ) { |
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| 179 | $result .= 'Z'; |
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| 180 | } |
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| 181 | } |
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| 182 | return $result; |
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| 183 | } |
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| 184 | |
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| 185 | |
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| 186 | public function RFC5545Duration( $end_stamp ) { |
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| 187 | return sprintf( 'PT%dM', intval(($end_stamp->epoch() - $this->epoch()) / 60) ); |
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| 188 | } |
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| 189 | |
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| 190 | |
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| 191 | public function setTimeZone( $tz ) { |
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| 192 | if ( is_string($tz) ) { |
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| 193 | $tz = new RepeatRuleTimeZone($tz); |
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| 194 | $this->tzid = $tz->tzid(); |
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| 195 | } |
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| 196 | parent::setTimeZone( $tz ); |
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| 197 | return $this; |
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| 198 | } |
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| 199 | |
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| 200 | |
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| 201 | function setDate( $year=null, $month=null, $day=null ) { |
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| 202 | if ( !isset($year) ) $year = parent::format('Y'); |
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| 203 | if ( !isset($month) ) $month = parent::format('m'); |
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| 204 | if ( !isset($day) ) $day = parent::format('d'); |
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| 205 | parent::setDate( $year , $month , $day ); |
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| 206 | return $this; |
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| 207 | } |
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| 208 | |
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| 209 | function year() { |
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| 210 | return parent::format('Y'); |
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| 211 | } |
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| 212 | |
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| 213 | function month() { |
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| 214 | return parent::format('m'); |
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| 215 | } |
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| 216 | |
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| 217 | function day() { |
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| 218 | return parent::format('d'); |
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| 219 | } |
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| 220 | |
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| 221 | function hour() { |
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| 222 | return parent::format('H'); |
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| 223 | } |
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| 224 | |
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| 225 | function minute() { |
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| 226 | return parent::format('i'); |
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| 227 | } |
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| 228 | |
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| 229 | function second() { |
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| 230 | return parent::format('s'); |
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| 231 | } |
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| 232 | |
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| 233 | function epoch() { |
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| 234 | return parent::format('U'); |
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| 235 | } |
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| 236 | } |
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| 237 | |
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| 238 | |
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| 239 | class RepeatRule { |
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| 240 | |
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| 241 | private $base; |
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| 242 | private $until; |
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| 243 | private $freq; |
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| 244 | private $count; |
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| 245 | private $interval; |
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| 246 | private $bysecond; |
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| 247 | private $byminute; |
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| 248 | private $byhour; |
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| 249 | private $bymonthday; |
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| 250 | private $byyearday; |
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| 251 | private $byweekno; |
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| 252 | private $byday; |
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| 253 | private $bymonth; |
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| 254 | private $bysetpos; |
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| 255 | private $wkst; |
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| 256 | |
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| 257 | private $instances; |
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| 258 | private $position; |
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| 259 | private $finished; |
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| 260 | private $current_base; |
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| 261 | |
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| 262 | |
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| 263 | public function __construct( $basedate, $rrule ) { |
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| 264 | $this->base = ( is_object($basedate) ? $basedate : new RepeatRuleDateTime($basedate) ); |
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| 265 | |
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| 266 | if ( $GLOBALS['debug_rrule'] ) { |
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| 267 | printf( "Constructing RRULE based on: '%s', rrule: '%s'\n", $basedate, $rrule ); |
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| 268 | } |
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| 269 | |
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| 270 | if ( preg_match('{FREQ=([A-Z]+)(;|$)}', $rrule, $m) ) $this->freq = $m[1]; |
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| 271 | if ( preg_match('{UNTIL=([0-9TZ]+)(;|$)}', $rrule, $m) ) $this->until = new RepeatRuleDateTime($m[1]); |
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| 272 | if ( preg_match('{COUNT=([0-9]+)(;|$)}', $rrule, $m) ) $this->count = $m[1]; |
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| 273 | if ( preg_match('{INTERVAL=([0-9]+)(;|$)}', $rrule, $m) ) $this->interval = $m[1]; |
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| 274 | if ( preg_match('{WKST=(MO|TU|WE|TH|FR|SA|SU)(;|$)}', $rrule, $m) ) $this->wkst = $m[1]; |
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| 275 | |
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| 276 | if ( preg_match('{BYDAY=(([+-]?[0-9]{0,2}(MO|TU|WE|TH|FR|SA|SU),?)+)(;|$)}', $rrule, $m) ) $this->byday = explode(',',$m[1]); |
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| 277 | |
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| 278 | if ( preg_match('{BYYEARDAY=([0-9,+-]+)(;|$)}', $rrule, $m) ) $this->byyearday = explode(',',$m[1]); |
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| 279 | if ( preg_match('{BYWEEKNO=([0-9,+-]+)(;|$)}', $rrule, $m) ) $this->byweekno = explode(',',$m[1]); |
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| 280 | if ( preg_match('{BYMONTHDAY=([0-9,+-]+)(;|$)}', $rrule, $m) ) $this->bymonthday = explode(',',$m[1]); |
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| 281 | if ( preg_match('{BYMONTH=(([+-]?[0-1]?[0-9],?)+)(;|$)}', $rrule, $m) ) $this->bymonth = explode(',',$m[1]); |
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| 282 | if ( preg_match('{BYSETPOS=(([+-]?[0-9]{1,3},?)+)(;|$)}', $rrule, $m) ) $this->bysetpos = explode(',',$m[1]); |
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| 283 | |
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| 284 | if ( preg_match('{BYSECOND=([0-9,]+)(;|$)}', $rrule, $m) ) $this->bysecond = explode(',',$m[1]); |
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| 285 | if ( preg_match('{BYMINUTE=([0-9,]+)(;|$)}', $rrule, $m) ) $this->byminute = explode(',',$m[1]); |
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| 286 | if ( preg_match('{BYHOUR=([0-9,]+)(;|$)}', $rrule, $m) ) $this->byhour = explode(',',$m[1]); |
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| 287 | |
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| 288 | if ( !isset($this->interval) ) $this->interval = 1; |
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| 289 | switch( $this->freq ) { |
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| 290 | case 'SECONDLY': $this->freq_name = 'second'; break; |
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| 291 | case 'MINUTELY': $this->freq_name = 'minute'; break; |
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| 292 | case 'HOURLY': $this->freq_name = 'hour'; break; |
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| 293 | case 'DAILY': $this->freq_name = 'day'; break; |
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| 294 | case 'WEEKLY': $this->freq_name = 'week'; break; |
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| 295 | case 'MONTHLY': $this->freq_name = 'month'; break; |
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| 296 | case 'YEARLY': $this->freq_name = 'year'; break; |
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| 297 | default: |
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| 298 | /** need to handle the error, but FREQ is mandatory so unlikely */ |
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| 299 | } |
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| 300 | $this->frequency_string = sprintf('+%d %s', $this->interval, $this->freq_name ); |
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| 301 | if ( $GLOBALS['debug_rrule'] ) printf( "Frequency modify string is: '%s', base is: '%s'\n", $this->frequency_string, $this->base->format('c') ); |
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| 302 | $this->Start(); |
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| 303 | } |
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| 304 | |
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| 305 | |
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| 306 | public function set_timezone( $tzstring ) { |
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| 307 | $this->base->setTimezone(new DateTimeZone($tzstring)); |
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| 308 | } |
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| 309 | |
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| 310 | |
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| 311 | public function Start() { |
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| 312 | $this->instances = array(); |
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| 313 | $this->GetMoreInstances(); |
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| 314 | $this->rewind(); |
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| 315 | $this->finished = false; |
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| 316 | } |
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| 317 | |
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| 318 | |
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| 319 | public function rewind() { |
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| 320 | $this->position = -1; |
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| 321 | } |
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| 322 | |
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| 323 | |
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| 324 | public function next() { |
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| 325 | $this->position++; |
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| 326 | return $this->current(); |
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| 327 | } |
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| 328 | |
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| 329 | |
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| 330 | public function current() { |
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| 331 | if ( !$this->valid() ) return null; |
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| 332 | if ( !isset($this->instances[$this->position]) ) $this->GetMoreInstances(); |
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| 333 | if ( !$this->valid() ) return null; |
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| 334 | if ( $GLOBALS['debug_rrule'] ) printf( "Returning date from position %d: %s (%s)\n", $this->position, $this->instances[$this->position]->format('c'), $this->instances[$this->position]->UTC() ); |
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| 335 | return $this->instances[$this->position]; |
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| 336 | } |
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| 337 | |
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| 338 | |
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| 339 | public function key() { |
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| 340 | if ( !$this->valid() ) return null; |
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| 341 | if ( !isset($this->instances[$this->position]) ) $this->GetMoreInstances(); |
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| 342 | if ( !isset($this->keys[$this->position]) ) { |
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| 343 | $this->keys[$this->position] = $this->instances[$this->position]; |
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| 344 | } |
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| 345 | return $this->keys[$this->position]; |
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| 346 | } |
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| 347 | |
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| 348 | |
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| 349 | public function valid() { |
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| 350 | if ( isset($this->instances[$this->position]) || !$this->finished ) return true; |
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| 351 | return false; |
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| 352 | } |
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| 353 | |
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| 354 | |
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| 355 | private function GetMoreInstances() { |
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| 356 | global $rrule_expand_limit; |
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| 357 | |
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| 358 | if ( $this->finished ) return; |
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| 359 | $got_more = false; |
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| 360 | $loop_limit = 10; |
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| 361 | $loops = 0; |
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| 362 | while( !$this->finished && !$got_more && $loops++ < $loop_limit ) { |
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| 363 | if ( !isset($this->current_base) ) { |
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| 364 | $this->current_base = clone($this->base); |
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| 365 | } |
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| 366 | else { |
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| 367 | $this->current_base->modify( $this->frequency_string ); |
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| 368 | } |
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| 369 | if ( $GLOBALS['debug_rrule'] ) printf( "Getting more instances from: '%s' - %d\n", $this->current_base->format('c'), count($this->instances) ); |
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| 370 | $this->current_set = array( clone($this->current_base) ); |
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| 371 | foreach( $rrule_expand_limit[$this->freq] AS $bytype => $action ) { |
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| 372 | if ( isset($this->{$bytype}) ) $this->{$action.'_'.$bytype}(); |
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| 373 | if ( !isset($this->current_set[0]) ) break; |
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| 374 | } |
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| 375 | sort($this->current_set); |
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| 376 | if ( isset($this->bysetpos) ) $this->limit_bysetpos(); |
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| 377 | |
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| 378 | $position = count($this->instances) - 1; |
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| 379 | if ( $GLOBALS['debug_rrule'] ) printf( "Inserting %d from current_set into position %d\n", count($this->current_set), $position + 1 ); |
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| 380 | foreach( $this->current_set AS $k => $instance ) { |
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| 381 | if ( $instance < $this->base ) continue; |
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| 382 | if ( isset($this->until) && $instance > $this->until ) { |
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| 383 | $this->finished = true; |
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| 384 | return; |
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| 385 | } |
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| 386 | if ( !isset($this->instances[$position]) || $instance != $this->instances[$position] ) { |
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| 387 | $got_more = true; |
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| 388 | $position++; |
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| 389 | $this->instances[$position] = $instance; |
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| 390 | if ( $GLOBALS['debug_rrule'] ) printf( "Added date %s into position %d in current set\n", $instance->format('c'), $position ); |
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| 391 | if ( isset($this->count) && ($position + 1) >= $this->count ) $this->finished = true; |
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| 392 | } |
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| 393 | } |
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| 394 | } |
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| 395 | } |
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| 396 | |
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| 397 | |
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| 398 | static public function date_mask( $date, $y, $mo, $d, $h, $mi, $s ) { |
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| 399 | $date_parts = explode(',',$date->format('Y,m,d,H,i,s')); |
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| 400 | |
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| 401 | $tz = $date->getTimezone(); |
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| 402 | if ( isset($y) || isset($mo) || isset($d) ) { |
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| 403 | if ( isset($y) ) $date_parts[0] = $y; |
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| 404 | if ( isset($mo) ) $date_parts[1] = $mo; |
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| 405 | if ( isset($d) ) $date_parts[2] = $d; |
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| 406 | $date->setDate( $date_parts[0], $date_parts[1], $date_parts[2] ); |
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| 407 | } |
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| 408 | if ( isset($h) || isset($mi) || isset($s) ) { |
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| 409 | if ( isset($h) ) $date_parts[3] = $h; |
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| 410 | if ( isset($mi) ) $date_parts[4] = $mi; |
---|
| 411 | if ( isset($s) ) $date_parts[5] = $s; |
---|
| 412 | $date->setTime( $date_parts[3], $date_parts[4], $date_parts[5] ); |
---|
| 413 | } |
---|
| 414 | return $date; |
---|
| 415 | } |
---|
| 416 | |
---|
| 417 | |
---|
| 418 | private function expand_bymonth() { |
---|
| 419 | $instances = $this->current_set; |
---|
| 420 | $this->current_set = array(); |
---|
| 421 | foreach( $instances AS $k => $instance ) { |
---|
| 422 | foreach( $this->bymonth AS $k => $month ) { |
---|
| 423 | $expanded = $this->date_mask( clone($instance), null, $month, null, null, null, null); |
---|
| 424 | if ( $GLOBALS['debug_rrule'] ) printf( "Expanded BYMONTH $month into date %s\n", $expanded->format('c') ); |
---|
| 425 | $this->current_set[] = $expanded; |
---|
| 426 | } |
---|
| 427 | } |
---|
| 428 | } |
---|
| 429 | |
---|
| 430 | private function expand_bymonthday() { |
---|
| 431 | $instances = $this->current_set; |
---|
| 432 | $this->current_set = array(); |
---|
| 433 | foreach( $instances AS $k => $instance ) { |
---|
| 434 | foreach( $this->bymonthday AS $k => $monthday ) { |
---|
| 435 | $this->current_set[] = $this->date_mask( clone($instance), null, null, $monthday, null, null, null); |
---|
| 436 | } |
---|
| 437 | } |
---|
| 438 | } |
---|
| 439 | |
---|
| 440 | |
---|
| 441 | private function expand_byday_in_week( $day_in_week ) { |
---|
| 442 | global $rrule_day_numbers; |
---|
| 443 | |
---|
| 444 | /** |
---|
| 445 | * @TODO: This should really allow for WKST, since if we start a series |
---|
| 446 | * on (eg.) TH and interval > 1, a MO, TU, FR repeat will not be in the |
---|
| 447 | * same week with this code. |
---|
| 448 | */ |
---|
| 449 | $dow_of_instance = $day_in_week->format('w'); // 0 == Sunday |
---|
| 450 | foreach( $this->byday AS $k => $weekday ) { |
---|
| 451 | $dow = $rrule_day_numbers[$weekday]; |
---|
| 452 | $offset = $dow - $dow_of_instance; |
---|
| 453 | if ( $offset < 0 ) $offset += 7; |
---|
| 454 | $expanded = clone($day_in_week); |
---|
| 455 | $expanded->modify( sprintf('+%d day', $offset) ); |
---|
| 456 | $this->current_set[] = $expanded; |
---|
| 457 | if ( $GLOBALS['debug_rrule'] ) printf( "Expanded BYDAY(W) $weekday into date %s\n", $expanded->format('c') ); |
---|
| 458 | } |
---|
| 459 | } |
---|
| 460 | |
---|
| 461 | |
---|
| 462 | private function expand_byday_in_month( $day_in_month ) { |
---|
| 463 | global $rrule_day_numbers; |
---|
| 464 | |
---|
| 465 | $first_of_month = $this->date_mask( clone($day_in_month), null, null, 1, null, null, null); |
---|
| 466 | $dow_of_first = $first_of_month->format('w'); // 0 == Sunday |
---|
| 467 | $days_in_month = cal_days_in_month(CAL_GREGORIAN, $first_of_month->format('m'), $first_of_month->format('Y')); |
---|
| 468 | foreach( $this->byday AS $k => $weekday ) { |
---|
| 469 | if ( preg_match('{([+-])?(\d)?(MO|TU|WE|TH|FR|SA|SU)}', $weekday, $matches ) ) { |
---|
| 470 | $dow = $rrule_day_numbers[$matches[3]]; |
---|
| 471 | $first_dom = 1 + $dow - $dow_of_first; if ( $first_dom < 1 ) $first_dom +=7; // e.g. 1st=WE, dow=MO => 1+1-3=-1 => MO is 6th, etc. |
---|
| 472 | $whichweek = intval($matches[2]); |
---|
| 473 | if ( $GLOBALS['debug_rrule'] ) printf( "Expanding BYDAY(M) $weekday in month of %s\n", $instance->format('c') ); |
---|
| 474 | if ( $whichweek > 0 ) { |
---|
| 475 | $whichweek--; |
---|
| 476 | $monthday = $first_dom; |
---|
| 477 | if ( $matches[1] == '-' ) { |
---|
| 478 | $monthday += 35; |
---|
| 479 | while( $monthday > $days_in_month ) $monthday -= 7; |
---|
| 480 | $monthday -= (7 * $whichweek); |
---|
| 481 | } |
---|
| 482 | else { |
---|
| 483 | $monthday += (7 * $whichweek); |
---|
| 484 | } |
---|
| 485 | if ( $monthday > 0 && $monthday <= $days_in_month ) { |
---|
| 486 | $expanded = $this->date_mask( clone($day_in_month), null, null, $monthday, null, null, null); |
---|
| 487 | if ( $GLOBALS['debug_rrule'] ) printf( "Expanded BYDAY(M) $weekday now $monthday into date %s\n", $expanded->format('c') ); |
---|
| 488 | $this->current_set[] = $expanded; |
---|
| 489 | } |
---|
| 490 | } |
---|
| 491 | else { |
---|
| 492 | for( $monthday = $first_dom; $monthday <= $days_in_month; $monthday += 7 ) { |
---|
| 493 | $expanded = $this->date_mask( clone($day_in_month), null, null, $monthday, null, null, null); |
---|
| 494 | if ( $GLOBALS['debug_rrule'] ) printf( "Expanded BYDAY(M) $weekday now $monthday into date %s\n", $expanded->format('c') ); |
---|
| 495 | $this->current_set[] = $expanded; |
---|
| 496 | } |
---|
| 497 | } |
---|
| 498 | } |
---|
| 499 | } |
---|
| 500 | } |
---|
| 501 | |
---|
| 502 | |
---|
| 503 | private function expand_byday_in_year( $day_in_year ) { |
---|
| 504 | global $rrule_day_numbers; |
---|
| 505 | |
---|
| 506 | $first_of_year = $this->date_mask( clone($day_in_year), null, 1, 1, null, null, null); |
---|
| 507 | $dow_of_first = $first_of_year->format('w'); // 0 == Sunday |
---|
| 508 | $days_in_year = 337 + cal_days_in_month(CAL_GREGORIAN, 2, $first_of_year->format('Y')); |
---|
| 509 | foreach( $this->byday AS $k => $weekday ) { |
---|
| 510 | if ( preg_match('{([+-])?(\d)?(MO|TU|WE|TH|FR|SA|SU)}', $weekday, $matches ) ) { |
---|
| 511 | $expanded = clone($first_of_year); |
---|
| 512 | $dow = $rrule_day_numbers[$matches[3]]; |
---|
| 513 | $first_doy = 1 + $dow - $dow_of_first; if ( $first_doy < 1 ) $first_doy +=7; // e.g. 1st=WE, dow=MO => 1+1-3=-1 => MO is 6th, etc. |
---|
| 514 | $whichweek = intval($matches[2]); |
---|
| 515 | if ( $GLOBALS['debug_rrule'] ) printf( "Expanding BYDAY(Y) $weekday from date %s\n", $instance->format('c') ); |
---|
| 516 | if ( $whichweek > 0 ) { |
---|
| 517 | $whichweek--; |
---|
| 518 | $yearday = $first_doy; |
---|
| 519 | if ( $matches[1] == '-' ) { |
---|
| 520 | $yearday += 371; |
---|
| 521 | while( $yearday > $days_in_year ) $yearday -= 7; |
---|
| 522 | $yearday -= (7 * $whichweek); |
---|
| 523 | } |
---|
| 524 | else { |
---|
| 525 | $yearday += (7 * $whichweek); |
---|
| 526 | } |
---|
| 527 | if ( $yearday > 0 && $yearday <= $days_in_year ) { |
---|
| 528 | $expanded->modify(sprintf('+%d day', $yearday - 1)); |
---|
| 529 | if ( $GLOBALS['debug_rrule'] ) printf( "Expanded BYDAY(Y) $weekday now $yearday into date %s\n", $expanded->format('c') ); |
---|
| 530 | $this->current_set[] = $expanded; |
---|
| 531 | } |
---|
| 532 | } |
---|
| 533 | else { |
---|
| 534 | $expanded->modify(sprintf('+%d day', $first_doy - 1)); |
---|
| 535 | for( $yearday = $first_doy; $yearday <= $days_in_year; $yearday += 7 ) { |
---|
| 536 | if ( $GLOBALS['debug_rrule'] ) printf( "Expanded BYDAY(Y) $weekday now $yearday into date %s\n", $expanded->format('c') ); |
---|
| 537 | $this->current_set[] = clone($expanded); |
---|
| 538 | $expanded->modify('+1 week'); |
---|
| 539 | } |
---|
| 540 | } |
---|
| 541 | } |
---|
| 542 | } |
---|
| 543 | } |
---|
| 544 | |
---|
| 545 | |
---|
| 546 | private function expand_byday() { |
---|
| 547 | if ( !isset($this->current_set[0]) ) return; |
---|
| 548 | if ( $this->freq == 'MONTHLY' || $this->freq == 'YEARLY' ) { |
---|
| 549 | if ( isset($this->bymonthday) || isset($this->byyearday) ) { |
---|
| 550 | $this->limit_byday(); /** Per RFC5545 3.3.10 from note 1&2 to table */ |
---|
| 551 | return; |
---|
| 552 | } |
---|
| 553 | } |
---|
| 554 | $instances = $this->current_set; |
---|
| 555 | $this->current_set = array(); |
---|
| 556 | foreach( $instances AS $k => $instance ) { |
---|
| 557 | if ( $this->freq == 'MONTHLY' ) { |
---|
| 558 | $this->expand_byday_in_month($instance); |
---|
| 559 | } |
---|
| 560 | else if ( $this->freq == 'WEEKLY' ) { |
---|
| 561 | $this->expand_byday_in_week($instance); |
---|
| 562 | } |
---|
| 563 | else { // YEARLY |
---|
| 564 | if ( isset($this->bymonth) ) { |
---|
| 565 | $this->expand_byday_in_month($instance); |
---|
| 566 | } |
---|
| 567 | else if ( isset($this->byweekno) ) { |
---|
| 568 | $this->expand_byday_in_week($instance); |
---|
| 569 | } |
---|
| 570 | else { |
---|
| 571 | $this->expand_byday_in_year($instance); |
---|
| 572 | } |
---|
| 573 | } |
---|
| 574 | |
---|
| 575 | } |
---|
| 576 | } |
---|
| 577 | |
---|
| 578 | private function expand_byhour() { |
---|
| 579 | $instances = $this->current_set; |
---|
| 580 | $this->current_set = array(); |
---|
| 581 | foreach( $instances AS $k => $instance ) { |
---|
| 582 | foreach( $this->bymonth AS $k => $month ) { |
---|
| 583 | $this->current_set[] = $this->date_mask( clone($instance), null, null, null, $hour, null, null); |
---|
| 584 | } |
---|
| 585 | } |
---|
| 586 | } |
---|
| 587 | |
---|
| 588 | private function expand_byminute() { |
---|
| 589 | $instances = $this->current_set; |
---|
| 590 | $this->current_set = array(); |
---|
| 591 | foreach( $instances AS $k => $instance ) { |
---|
| 592 | foreach( $this->bymonth AS $k => $month ) { |
---|
| 593 | $this->current_set[] = $this->date_mask( clone($instance), null, null, null, null, $minute, null); |
---|
| 594 | } |
---|
| 595 | } |
---|
| 596 | } |
---|
| 597 | |
---|
| 598 | private function expand_bysecond() { |
---|
| 599 | $instances = $this->current_set; |
---|
| 600 | $this->current_set = array(); |
---|
| 601 | foreach( $instances AS $k => $instance ) { |
---|
| 602 | foreach( $this->bymonth AS $k => $second ) { |
---|
| 603 | $this->current_set[] = $this->date_mask( clone($instance), null, null, null, null, null, $second); |
---|
| 604 | } |
---|
| 605 | } |
---|
| 606 | } |
---|
| 607 | |
---|
| 608 | |
---|
| 609 | private function limit_generally( $fmt_char, $element_name ) { |
---|
| 610 | $instances = $this->current_set; |
---|
| 611 | $this->current_set = array(); |
---|
| 612 | foreach( $instances AS $k => $instance ) { |
---|
| 613 | foreach( $this->{$element_name} AS $k => $element_value ) { |
---|
| 614 | if ( $GLOBALS['debug_rrule'] ) printf( "Limiting '$fmt_char' on '%s' => '%s' ?=? '%s' ? %s\n", $instance->format('c'), $instance->format($fmt_char), $element_value, ($instance->format($fmt_char) == $element_value ? 'Yes' : 'No') ); |
---|
| 615 | if ( $instance->format($fmt_char) == $element_value ) $this->current_set[] = $instance; |
---|
| 616 | } |
---|
| 617 | } |
---|
| 618 | } |
---|
| 619 | |
---|
| 620 | private function limit_byday() { |
---|
| 621 | global $rrule_day_numbers; |
---|
| 622 | |
---|
| 623 | $fmt_char = 'w'; |
---|
| 624 | $instances = $this->current_set; |
---|
| 625 | $this->current_set = array(); |
---|
| 626 | foreach( $this->byday AS $k => $weekday ) { |
---|
| 627 | $dow = $rrule_day_numbers[$weekday]; |
---|
| 628 | foreach( $instances AS $k => $instance ) { |
---|
| 629 | if ( $GLOBALS['debug_rrule'] ) printf( "Limiting '$fmt_char' on '%s' => '%s' ?=? '%s' (%d) ? %s\n", $instance->format('c'), $instance->format($fmt_char), $weekday, $dow, ($instance->format($fmt_char) == $dow ? 'Yes' : 'No') ); |
---|
| 630 | if ( $instance->format($fmt_char) == $dow ) $this->current_set[] = $instance; |
---|
| 631 | } |
---|
| 632 | } |
---|
| 633 | } |
---|
| 634 | |
---|
| 635 | private function limit_bymonth() { $this->limit_generally( 'm', 'bymonth' ); } |
---|
| 636 | private function limit_byyearday() { $this->limit_generally( 'z', 'byyearday' ); } |
---|
| 637 | private function limit_bymonthday() { $this->limit_generally( 'd', 'bymonthday' ); } |
---|
| 638 | private function limit_byhour() { $this->limit_generally( 'H', 'byhour' ); } |
---|
| 639 | private function limit_byminute() { $this->limit_generally( 'i', 'byminute' ); } |
---|
| 640 | private function limit_bysecond() { $this->limit_generally( 's', 'bysecond' ); } |
---|
| 641 | |
---|
| 642 | |
---|
| 643 | private function limit_bysetpos( ) { |
---|
| 644 | $instances = $this->current_set; |
---|
| 645 | $count = count($instances); |
---|
| 646 | $this->current_set = array(); |
---|
| 647 | foreach( $this->bysetpos AS $k => $element_value ) { |
---|
| 648 | if ( $GLOBALS['debug_rrule'] ) printf( "Limiting bysetpos %s of %d instances\n", $element_value, $count ); |
---|
| 649 | if ( $element_value > 0 ) { |
---|
| 650 | $this->current_set[] = $instances[$element_value - 1]; |
---|
| 651 | } |
---|
| 652 | else if ( $element_value < 0 ) { |
---|
| 653 | $this->current_set[] = $instances[$count + $element_value]; |
---|
| 654 | } |
---|
| 655 | } |
---|
| 656 | } |
---|
| 657 | |
---|
| 658 | |
---|
| 659 | } |
---|
| 660 | |
---|
| 661 | |
---|
| 662 | require_once("vComponent.php"); |
---|
| 663 | |
---|
| 664 | /** |
---|
| 665 | * Expand the event instances for an RDATE or EXDATE property |
---|
| 666 | * |
---|
| 667 | * @param string $property RDATE or EXDATE, depending... |
---|
| 668 | * @param array $component A vComponent which is a VEVENT, VTODO or VJOURNAL |
---|
| 669 | * @param array $range_end A date after which we care less about expansion |
---|
| 670 | * |
---|
| 671 | * @return array An array keyed on the UTC dates, referring to the component |
---|
| 672 | */ |
---|
| 673 | function rdate_expand( $dtstart, $property, $component, $range_end = null ) { |
---|
| 674 | $properties = $component->GetProperties($property); |
---|
| 675 | $expansion = array(); |
---|
| 676 | foreach( $properties AS $p ) { |
---|
| 677 | $timezone = $p->GetParameterValue('TZID'); |
---|
| 678 | $rdate = $p->Value(); |
---|
| 679 | $rdates = explode( ',', $rdate ); |
---|
| 680 | foreach( $rdates AS $k => $v ) { |
---|
| 681 | $rdate = new RepeatRuleDateTime( $v, $timezone); |
---|
| 682 | $expansion[$rdate->UTC()] = $component; |
---|
| 683 | if ( $rdate > $range_end ) break; |
---|
| 684 | } |
---|
| 685 | } |
---|
| 686 | return $expansion; |
---|
| 687 | } |
---|
| 688 | |
---|
| 689 | |
---|
| 690 | /** |
---|
| 691 | * Expand the event instances for an RRULE property |
---|
| 692 | * |
---|
| 693 | * @param object $dtstart A RepeatRuleDateTime which is the master dtstart |
---|
| 694 | * @param string $property RDATE or EXDATE, depending... |
---|
| 695 | * @param array $component A vComponent which is a VEVENT, VTODO or VJOURNAL |
---|
| 696 | * @param array $range_end A date after which we care less about expansion |
---|
| 697 | * |
---|
| 698 | * @return array An array keyed on the UTC dates, referring to the component |
---|
| 699 | */ |
---|
| 700 | function rrule_expand( $dtstart, $property, $component, $range_end ) { |
---|
| 701 | $expansion = array(); |
---|
| 702 | |
---|
| 703 | $recur = $component->GetProperty($property); |
---|
| 704 | if ( !isset($recur) ) return $expansion; |
---|
| 705 | $recur = $recur->Value(); |
---|
| 706 | |
---|
| 707 | $this_start = $component->GetProperty('DTSTART'); |
---|
| 708 | if ( isset($this_start) ) { |
---|
| 709 | $timezone = $this_start->GetParameterValue('TZID'); |
---|
| 710 | $this_start = new RepeatRuleDateTime($this_start->Value(),$timezone); |
---|
| 711 | } |
---|
| 712 | else { |
---|
| 713 | $this_start = clone($dtstart); |
---|
| 714 | } |
---|
| 715 | |
---|
| 716 | // print_r( $this_start ); |
---|
| 717 | // printf( "RRULE: %s\n", $recur ); |
---|
| 718 | $rule = new RepeatRule( $this_start, $recur ); |
---|
| 719 | $i = 0; |
---|
| 720 | $result_limit = 1000; |
---|
| 721 | while( $date = $rule->next() ) { |
---|
| 722 | // printf( "[%3d] %s\n", $i, $date->UTC() ); |
---|
| 723 | $expansion[$date->UTC()] = $component; |
---|
| 724 | if ( $i++ >= $result_limit || $date > $range_end ) break; |
---|
| 725 | } |
---|
| 726 | // print_r( $expansion ); |
---|
| 727 | return $expansion; |
---|
| 728 | } |
---|
| 729 | |
---|
| 730 | |
---|
| 731 | /** |
---|
| 732 | * Expand the event instances for an iCalendar VEVENT (or VTODO) |
---|
| 733 | * |
---|
| 734 | * @param object $vResource A vComponent which is a VCALENDAR containing components needing expansion |
---|
| 735 | * @param object $range_start A RepeatRuleDateTime which is the beginning of the range for events, default -6 weeks |
---|
| 736 | * @param object $range_end A RepeatRuleDateTime which is the end of the range for events, default +6 weeks |
---|
| 737 | * |
---|
| 738 | * @return vComponent The original vComponent, with the instances of the internal components expanded. |
---|
| 739 | */ |
---|
| 740 | function expand_event_instances( $vResource, $range_start = null, $range_end = null ) { |
---|
| 741 | $components = $vResource->GetComponents(); |
---|
| 742 | |
---|
| 743 | if ( !isset($range_start) ) { $range_start = new RepeatRuleDateTime(); $range_start->modify('-6 weeks'); } |
---|
| 744 | if ( !isset($range_end) ) { $range_end = clone($range_start); $range_end->modify('+6 months'); } |
---|
| 745 | |
---|
| 746 | $new_components = array(); |
---|
| 747 | $result_limit = 1000; |
---|
| 748 | $instances = array(); |
---|
| 749 | $expand = false; |
---|
| 750 | $dtstart = null; |
---|
| 751 | foreach( $components AS $k => $comp ) { |
---|
| 752 | if ( $comp->GetType() != 'VEVENT' && $comp->GetType() != 'VTODO' && $comp->GetType() != 'VJOURNAL' ) { |
---|
| 753 | $new_components[] = $comp; |
---|
| 754 | continue; |
---|
| 755 | } |
---|
| 756 | if ( !isset($dtstart) ) { |
---|
| 757 | $dtstart = $comp->GetProperty('DTSTART'); |
---|
| 758 | $tzid = $dtstart->GetParameterValue('TZID'); |
---|
| 759 | $dtstart = new RepeatRuleDateTime( $dtstart->Value(), $tzid ); |
---|
| 760 | $instances[$dtstart->UTC()] = $comp; |
---|
| 761 | } |
---|
| 762 | $p = $comp->GetProperty('RECURRENCE-ID'); |
---|
| 763 | if ( isset($p) && $p->Value() != '' ) { |
---|
| 764 | $range = $p->GetParameterValue('RANGE'); |
---|
| 765 | $recur_tzid = $p->GetParameterValue('TZID'); |
---|
| 766 | $recur_utc = new RepeatRuleDateTime($p->Value(),$recur_tzid); |
---|
| 767 | $recur_utc = $recur_utc->UTC(); |
---|
| 768 | if ( isset($range) && $range == 'THISANDFUTURE' ) { |
---|
| 769 | foreach( $instances AS $k => $v ) { |
---|
| 770 | if ( $k >= $recur_utc ) unset($instances[$k]); |
---|
| 771 | } |
---|
| 772 | } |
---|
| 773 | else { |
---|
| 774 | unset($instances[$recur_utc]); |
---|
| 775 | } |
---|
| 776 | $instances[] = $comp; |
---|
| 777 | } |
---|
| 778 | $instances = array_merge( $instances, rrule_expand($dtstart, 'RRULE', $comp, $range_end) ); |
---|
| 779 | $instances = array_merge( $instances, rdate_expand($dtstart, 'RDATE', $comp, $range_end) ); |
---|
| 780 | foreach ( rdate_expand($dtstart, 'EXDATE', $comp, $range_end) AS $k => $v ) { |
---|
| 781 | unset($instances[$k]); |
---|
| 782 | } |
---|
| 783 | } |
---|
| 784 | |
---|
| 785 | $last_duration = null; |
---|
| 786 | $in_range = false; |
---|
| 787 | $new_components = array(); |
---|
| 788 | $start_utc = $range_start->UTC(); |
---|
| 789 | $end_utc = $range_end->UTC(); |
---|
| 790 | foreach( $instances AS $utc => $comp ) { |
---|
| 791 | if ( $utc > $end_utc ) break; |
---|
| 792 | |
---|
| 793 | $end_type = ($comp->GetType() == 'VTODO' ? 'DUE' : 'DTEND'); |
---|
| 794 | $duration = $comp->GetProperty('DURATION'); |
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| 795 | if ( !isset($duration) || $duration->Value() == '' ) { |
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| 796 | $instance_start = $comp->GetProperty('DTSTART'); |
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| 797 | $dtsrt = new RepeatRuleDateTime( $instance_start->Value(), $instance_start->GetParameterValue('TZID')); |
---|
| 798 | $instance_end = $comp->GetProperty($end_type); |
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| 799 | $dtend = new RepeatRuleDateTime( $instance_end->Value(), $instance_end->GetParameterValue('TZID')); |
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| 800 | $duration = $dtstart->RFC5545Duration( $dtend ); |
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| 801 | } |
---|
| 802 | else { |
---|
| 803 | $duration = $duration->Value(); |
---|
| 804 | } |
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| 805 | |
---|
| 806 | if ( $utc < $start_utc ) { |
---|
| 807 | if ( isset($last_duration) && $duration == $last_duration) { |
---|
| 808 | if ( $utc < $early_start ) continue; |
---|
| 809 | } |
---|
| 810 | else { |
---|
| 811 | $latest_start = clone($range_start); |
---|
| 812 | $latest_start->modify('-'.$duration); |
---|
| 813 | $early_start = $latest_start->UTC(); |
---|
| 814 | $last_duration = $duration; |
---|
| 815 | if ( $utc < $early_start ) continue; |
---|
| 816 | } |
---|
| 817 | } |
---|
| 818 | $component = clone($comp); |
---|
| 819 | $component->ClearProperties( array('DTSTART'=> true, 'DUE' => true, 'DTEND' => true) ); |
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| 820 | $component->AddProperty('DTSTART', $utc ); |
---|
| 821 | $component->AddProperty('DURATION', $duration ); |
---|
| 822 | $new_components[] = $component; |
---|
| 823 | $in_range = true; |
---|
| 824 | } |
---|
| 825 | |
---|
| 826 | if ( $in_range ) { |
---|
| 827 | $vResource->SetComponents($new_components); |
---|
| 828 | } |
---|
| 829 | else { |
---|
| 830 | $vResource->SetComponents(array()); |
---|
| 831 | } |
---|
| 832 | |
---|
| 833 | return $vResource; |
---|
| 834 | } |
---|