Automattic /
jetpack
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| 1 | <?php |
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| 2 | |||
| 3 | /** |
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| 4 | * Gets and renders iCal feeds for the Upcoming Events widget and shortcode |
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| 5 | */ |
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| 6 | |||
| 7 | class iCalendarReader { |
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| 8 | |||
| 9 | public $todo_count = 0; |
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| 10 | public $event_count = 0; |
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| 11 | public $cal = array(); |
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| 12 | public $_lastKeyWord = ''; |
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| 13 | public $timezone = null; |
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| 14 | |||
| 15 | /** |
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| 16 | * Class constructor |
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| 17 | * |
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| 18 | * @return void |
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| 19 | */ |
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| 20 | public function __construct() {} |
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| 21 | |||
| 22 | /** |
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| 23 | * Return an array of events |
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| 24 | * |
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| 25 | * @param string $url (default: '') |
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| 26 | * @return array | false on failure |
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| 27 | */ |
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| 28 | public function get_events( $url = '', $count = 5 ) { |
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| 29 | $count = (int) $count; |
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| 30 | $transient_id = 'icalendar_vcal_' . md5( $url ) . '_' . $count; |
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| 31 | |||
| 32 | $vcal = get_transient( $transient_id ); |
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| 33 | |||
| 34 | if ( ! empty( $vcal ) ) { |
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| 35 | if ( isset( $vcal['TIMEZONE'] ) ) |
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| 36 | $this->timezone = $this->timezone_from_string( $vcal['TIMEZONE'] ); |
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| 37 | |||
| 38 | if ( isset( $vcal['VEVENT'] ) ) { |
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| 39 | $vevent = $vcal['VEVENT']; |
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| 40 | |||
| 41 | if ( $count > 0 ) |
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| 42 | $vevent = array_slice( $vevent, 0, $count ); |
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| 43 | |||
| 44 | $this->cal['VEVENT'] = $vevent; |
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| 45 | |||
| 46 | return $this->cal['VEVENT']; |
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| 47 | } |
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| 48 | } |
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| 49 | |||
| 50 | if ( ! $this->parse( $url ) ) |
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| 51 | return false; |
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| 52 | |||
| 53 | $vcal = array(); |
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| 54 | |||
| 55 | if ( $this->timezone ) { |
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| 56 | $vcal['TIMEZONE'] = $this->timezone->getName(); |
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| 57 | } else { |
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| 58 | $this->timezone = $this->timezone_from_string( '' ); |
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| 59 | } |
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| 60 | |||
| 61 | if ( ! empty( $this->cal['VEVENT'] ) ) { |
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| 62 | $vevent = $this->cal['VEVENT']; |
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| 63 | |||
| 64 | // check for recurring events |
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| 65 | // $vevent = $this->add_recurring_events( $vevent ); |
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| 66 | |||
| 67 | // remove before caching - no sense in hanging onto the past |
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| 68 | $vevent = $this->filter_past_and_recurring_events( $vevent ); |
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| 69 | |||
| 70 | // order by soonest start date |
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| 71 | $vevent = $this->sort_by_recent( $vevent ); |
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| 72 | |||
| 73 | $vcal['VEVENT'] = $vevent; |
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| 74 | } |
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| 75 | |||
| 76 | set_transient( $transient_id, $vcal, HOUR_IN_SECONDS ); |
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| 77 | |||
| 78 | if ( !isset( $vcal['VEVENT'] ) ) |
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| 79 | return false; |
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| 80 | |||
| 81 | if ( $count > 0 ) |
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| 82 | return array_slice( $vcal['VEVENT'], 0, $count ); |
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| 83 | |||
| 84 | return $vcal['VEVENT']; |
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| 85 | } |
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| 86 | |||
| 87 | protected function filter_past_and_recurring_events( $events ) { |
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| 88 | $upcoming = array(); |
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| 89 | $set_recurring_events = array(); |
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| 90 | $recurrences = array(); |
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| 91 | /** |
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| 92 | * This filter allows any time to be passed in for testing or changing timezones, etc... |
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| 93 | * |
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| 94 | * @module widgets |
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| 95 | * |
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| 96 | * @since 3.4.0 |
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| 97 | * |
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| 98 | * @param object time() A time object. |
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| 99 | */ |
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| 100 | $current = apply_filters( 'ical_get_current_time', time() ); |
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| 101 | |||
| 102 | foreach ( $events as $event ) { |
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| 103 | |||
| 104 | $date_from_ics = strtotime( $event['DTSTART'] ); |
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| 105 | View Code Duplication | if ( isset( $event['DTEND'] ) ) { |
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| 106 | $duration = strtotime( $event['DTEND'] ) - strtotime( $event['DTSTART'] ); |
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| 107 | } else { |
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| 108 | $duration = 0; |
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| 109 | } |
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| 110 | |||
| 111 | if ( isset( $event['RRULE'] ) && $this->timezone->getName() && 8 != strlen( $event['DTSTART'] ) ) { |
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| 112 | try { |
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| 113 | $adjusted_time = new DateTime( $event['DTSTART'], new DateTimeZone('UTC') ); |
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| 114 | $adjusted_time->setTimeZone( new DateTimeZone( $this->timezone->getName() ) ); |
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| 115 | $event['DTSTART'] = $adjusted_time->format('Ymd\THis'); |
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| 116 | $date_from_ics = strtotime( $event['DTSTART'] ); |
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| 117 | |||
| 118 | $event['DTEND'] = date( 'Ymd\THis', strtotime( $event['DTSTART'] ) + $duration ); |
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| 119 | } catch ( Exception $e ) { |
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| 120 | // Invalid argument to DateTime |
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| 121 | } |
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| 122 | |||
| 123 | if ( isset( $event['EXDATE'] ) ) { |
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| 124 | $exdates = array(); |
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| 125 | foreach ( (array) $event['EXDATE'] as $exdate ) { |
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| 126 | try { |
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| 127 | $adjusted_time = new DateTime( $exdate, new DateTimeZone('UTC') ); |
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| 128 | $adjusted_time->setTimeZone( new DateTimeZone( $this->timezone->getName() ) ); |
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| 129 | if ( 8 == strlen( $event['DTSTART'] ) ) { |
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| 130 | $exdates[] = $adjusted_time->format( 'Ymd' ); |
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| 131 | } else { |
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| 132 | $exdates[] = $adjusted_time->format( 'Ymd\THis' ); |
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| 133 | } |
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| 134 | } catch ( Exception $e ) { |
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| 135 | // Invalid argument to DateTime |
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| 136 | } |
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| 137 | } |
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| 138 | $event['EXDATE'] = $exdates; |
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| 139 | } else { |
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| 140 | $event['EXDATE'] = array(); |
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| 141 | } |
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| 142 | } |
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| 143 | |||
| 144 | if ( ! isset( $event['DTSTART'] ) ) { |
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| 145 | continue; |
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| 146 | } |
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| 147 | |||
| 148 | // Process events with RRULE before other events |
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| 149 | $rrule = isset( $event['RRULE'] ) ? $event['RRULE'] : false ; |
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| 150 | $uid = $event['UID']; |
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| 151 | |||
| 152 | if ( $rrule && ! in_array( $uid, $set_recurring_events ) ) { |
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| 153 | |||
| 154 | // Break down the RRULE into digestible chunks |
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| 155 | $rrule_array = array(); |
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| 156 | |||
| 157 | foreach ( explode( ";", $event['RRULE'] ) as $rline ) { |
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| 158 | list( $rkey, $rvalue ) = explode( "=", $rline, 2 ); |
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| 159 | $rrule_array[$rkey] = $rvalue; |
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| 160 | } |
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| 161 | |||
| 162 | $interval = ( isset( $rrule_array['INTERVAL'] ) ) ? $rrule_array['INTERVAL'] : 1; |
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| 163 | $rrule_count = ( isset( $rrule_array['COUNT'] ) ) ? $rrule_array['COUNT'] : 0; |
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| 164 | $until = ( isset( $rrule_array['UNTIL'] ) ) ? strtotime( $rrule_array['UNTIL'] ) : strtotime( '+1 year', $current ); |
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| 165 | |||
| 166 | // Used to bound event checks |
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| 167 | $echo_limit = 10; |
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| 168 | $noop = false; |
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| 169 | |||
| 170 | // Set bydays for the event |
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| 171 | $weekdays = array( 'SU', 'MO', 'TU', 'WE', 'TH', 'FR', 'SA' ); |
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| 172 | $bydays = $weekdays; |
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| 173 | |||
| 174 | // Calculate a recent start date for incrementing depending on the frequency and interval |
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| 175 | switch ( $rrule_array['FREQ'] ) { |
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| 176 | |||
| 177 | case 'DAILY': |
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| 178 | $frequency = 'day'; |
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| 179 | $echo_limit = 10; |
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| 180 | |||
| 181 | if ( $date_from_ics >= $current ) { |
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| 182 | $recurring_event_date_start = date( 'Ymd\THis', strtotime( $event['DTSTART'] ) ); |
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| 183 | } else { |
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| 184 | // Interval and count |
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| 185 | $catchup = floor( ( $current - strtotime( $event['DTSTART'] ) ) / ( $interval * DAY_IN_SECONDS ) ); |
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| 186 | if ( $rrule_count && $catchup > 0 ) { |
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| 187 | if ( $catchup < $rrule_count ) { |
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| 188 | $rrule_count = $rrule_count - $catchup; |
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| 189 | $recurring_event_date_start = date( 'Ymd', strtotime( '+ ' . ( $interval * $catchup ) . ' days', strtotime( $event['DTSTART'] ) ) ) . date( '\THis', strtotime( $event['DTSTART'] ) ); |
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| 190 | } else { |
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| 191 | $noop = true; |
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| 192 | } |
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| 193 | View Code Duplication | } else { |
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| 194 | $recurring_event_date_start = date( 'Ymd', strtotime( '+ ' . ( $interval * $catchup ) . ' days', strtotime( $event['DTSTART'] ) ) ) . date( '\THis', strtotime( $event['DTSTART'] ) ); |
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| 195 | } |
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| 196 | } |
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| 197 | break; |
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| 198 | |||
| 199 | case 'WEEKLY': |
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| 200 | $frequency = 'week'; |
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| 201 | $echo_limit = 4; |
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| 202 | |||
| 203 | // BYDAY exception to current date |
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| 204 | $day = false; |
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| 205 | if ( ! isset( $rrule_array['BYDAY'] ) ) { |
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| 206 | $day = $rrule_array['BYDAY'] = strtoupper( substr( date( 'D', strtotime( $event['DTSTART'] ) ), 0, 2 ) ); |
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| 207 | } |
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| 208 | $bydays = explode( ',', $rrule_array['BYDAY'] ); |
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| 209 | |||
| 210 | if ( $date_from_ics >= $current ) { |
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| 211 | $recurring_event_date_start = date( 'Ymd\THis', strtotime( $event['DTSTART'] ) ); |
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| 212 | } else { |
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| 213 | // Interval and count |
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| 214 | $catchup = floor( ( $current - strtotime( $event['DTSTART'] ) ) / ( $interval * WEEK_IN_SECONDS ) ); |
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| 215 | if ( $rrule_count && $catchup > 0 ) { |
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| 216 | if ( ( $catchup * count( $bydays ) ) < $rrule_count ) { |
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| 217 | $rrule_count = $rrule_count - ( $catchup * count( $bydays ) ); // Estimate current event count |
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| 218 | $recurring_event_date_start = date( 'Ymd', strtotime( '+ ' . ( $interval * $catchup ) . ' weeks', strtotime( $event['DTSTART'] ) ) ) . date( '\THis', strtotime( $event['DTSTART'] ) ); |
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| 219 | } else { |
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| 220 | $noop = true; |
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| 221 | } |
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| 222 | View Code Duplication | } else { |
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| 223 | $recurring_event_date_start = date( 'Ymd', strtotime( '+ ' . ( $interval * $catchup ) . ' weeks', strtotime( $event['DTSTART'] ) ) ) . date( '\THis', strtotime( $event['DTSTART'] ) ); |
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| 224 | } |
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| 225 | } |
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| 226 | |||
| 227 | // Set to Sunday start |
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| 228 | if ( ! $noop && 'SU' !== strtoupper( substr( date( 'D', strtotime( $recurring_event_date_start ) ), 0, 2 ) ) ) { |
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| 229 | $recurring_event_date_start = date( 'Ymd', strtotime( "last Sunday", strtotime( $recurring_event_date_start ) ) ) . date( '\THis', strtotime( $event['DTSTART'] ) ); |
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| 230 | } |
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| 231 | break; |
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| 232 | |||
| 233 | case 'MONTHLY': |
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| 234 | $frequency = 'month'; |
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| 235 | $echo_limit = 1; |
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| 236 | |||
| 237 | if ( $date_from_ics >= $current ) { |
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| 238 | $recurring_event_date_start = date( 'Ymd\THis', strtotime( $event['DTSTART'] ) ); |
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| 239 | } else { |
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| 240 | // Describe the date in the month |
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| 241 | if ( isset( $rrule_array['BYDAY'] ) ) { |
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| 242 | $day_number = substr( $rrule_array['BYDAY'], 0, 1 ); |
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| 243 | $week_day = substr( $rrule_array['BYDAY'], 1 ); |
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| 244 | $day_cardinals = array( 1 => 'first', 2 => 'second', 3 => 'third', 4 => 'fourth', 5 => 'fifth' ); |
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| 245 | $weekdays = array( 'SU' => 'Sunday', 'MO' => 'Monday', 'TU' => 'Tuesday', 'WE' => 'Wednesday', 'TH' => 'Thursday', 'FR' => 'Friday', 'SA' => 'Saturday' ); |
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| 246 | $event_date_desc = "{$day_cardinals[$day_number]} {$weekdays[$week_day]} of "; |
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| 247 | } else { |
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| 248 | $event_date_desc = date( 'd ', strtotime( $event['DTSTART'] ) ); |
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| 249 | } |
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| 250 | |||
| 251 | // Interval only |
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| 252 | if ( $interval > 1 ) { |
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| 253 | $catchup = 0; |
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| 254 | $maybe = strtotime( $event['DTSTART'] ); |
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| 255 | while ( $maybe < $current ) { |
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| 256 | $maybe = strtotime( '+ ' . ( $interval * $catchup ) . ' months', strtotime( $event['DTSTART'] ) ); |
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| 257 | $catchup++; |
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| 258 | } |
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| 259 | $recurring_event_date_start = date( 'Ymd', strtotime( $event_date_desc . date( 'F Y', strtotime( '+ ' . ( $interval * ( $catchup - 1 ) ) . ' months', strtotime( $event['DTSTART'] ) ) ) ) ) . date( '\THis', strtotime( $event['DTSTART'] ) ); |
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| 260 | View Code Duplication | } else { |
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| 261 | $recurring_event_date_start = date( 'Ymd', strtotime( $event_date_desc . date( 'F Y', $current ) ) ) . date( '\THis', strtotime( $event['DTSTART'] ) ); |
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| 262 | } |
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| 263 | |||
| 264 | // Add one interval if necessary |
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| 265 | if ( strtotime( $recurring_event_date_start ) < $current ) { |
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| 266 | if ( $interval > 1 ) { |
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| 267 | $recurring_event_date_start = date( 'Ymd', strtotime( $event_date_desc . date( 'F Y', strtotime( '+ ' . ( $interval * $catchup ) . ' months', strtotime( $event['DTSTART'] ) ) ) ) ) . date( '\THis', strtotime( $event['DTSTART'] ) ); |
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| 268 | View Code Duplication | } else { |
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| 269 | try { |
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| 270 | $adjustment = new DateTime( date( 'Y-m-d', $current ) ); |
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| 271 | $adjustment->modify( 'first day of next month' ); |
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| 272 | $recurring_event_date_start = date( 'Ymd', strtotime( $event_date_desc . $adjustment->format( 'F Y' ) ) ) . date( '\THis', strtotime( $event['DTSTART'] ) ); |
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| 273 | } catch ( Exception $e ) { |
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| 274 | // Invalid argument to DateTime |
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| 275 | } |
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| 276 | } |
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| 277 | } |
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| 278 | } |
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| 279 | break; |
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| 280 | |||
| 281 | case 'YEARLY': |
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| 282 | $frequency = 'year'; |
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| 283 | $echo_limit = 1; |
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| 284 | |||
| 285 | if ( $date_from_ics >= $current ) { |
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| 286 | $recurring_event_date_start = date( "Ymd\THis", strtotime( $event['DTSTART'] ) ); |
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| 287 | } else { |
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| 288 | $recurring_event_date_start = date( 'Y', $current ) . date( "md\THis", strtotime( $event['DTSTART'] ) ); |
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| 289 | View Code Duplication | if ( strtotime( $recurring_event_date_start ) < $current ) { |
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| 290 | try { |
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| 291 | $next = new DateTime( date( 'Y-m-d', $current ) ); |
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| 292 | $next->modify( 'first day of next year' ); |
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| 293 | $recurring_event_date_start = $next->format( 'Y' ) . date ( 'md\THis', strtotime( $event['DTSTART'] ) ); |
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| 294 | } catch ( Exception $e ) { |
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| 295 | // Invalid argument to DateTime |
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| 296 | } |
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| 297 | } |
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| 298 | } |
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| 299 | break; |
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| 300 | |||
| 301 | default: |
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| 302 | $frequency = false; |
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| 303 | } |
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| 304 | |||
| 305 | if ( $frequency !== false && ! $noop ) { |
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| 306 | $count_counter = 1; |
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| 307 | |||
| 308 | // If no COUNT limit, go to 10 |
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| 309 | if ( empty( $rrule_count ) ) { |
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| 310 | $rrule_count = 10; |
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| 311 | } |
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| 312 | |||
| 313 | // Set up EXDATE handling for the event |
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| 314 | $exdates = ( isset( $event['EXDATE'] ) ) ? $event['EXDATE'] : array(); |
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| 315 | |||
| 316 | for ( $i = 1; $i <= $echo_limit; $i++ ) { |
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| 317 | |||
| 318 | // Weeks need a daily loop and must check for inclusion in BYDAYS |
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| 319 | if ( 'week' == $frequency ) { |
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| 320 | $byday_event_date_start = strtotime( $recurring_event_date_start ); |
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| 321 | |||
| 322 | foreach ( $weekdays as $day ) { |
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| 323 | |||
| 324 | $event_start_timestamp = $byday_event_date_start; |
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| 325 | $start_time = date( 'His', $event_start_timestamp ); |
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| 326 | $event_end_timestamp = $event_start_timestamp + $duration; |
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| 327 | $end_time = date( 'His', $event_end_timestamp ); |
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| 328 | View Code Duplication | if ( 8 == strlen( $event['DTSTART'] ) ) { |
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| 329 | $exdate_compare = date( 'Ymd', $event_start_timestamp ); |
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| 330 | } else { |
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| 331 | $exdate_compare = date( 'Ymd\THis', $event_start_timestamp ); |
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| 332 | } |
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| 333 | |||
| 334 | View Code Duplication | if ( in_array( $day, $bydays ) && $event_end_timestamp > $current && $event_start_timestamp < $until && $count_counter <= $rrule_count && $event_start_timestamp >= $date_from_ics && ! in_array( $exdate_compare, $exdates ) ) { |
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| 335 | if ( 8 == strlen( $event['DTSTART'] ) ) { |
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| 336 | $event['DTSTART'] = date( 'Ymd', $event_start_timestamp ); |
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| 337 | $event['DTEND'] = date( 'Ymd', $event_end_timestamp ); |
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| 338 | } else { |
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| 339 | $event['DTSTART'] = date( 'Ymd\THis', $event_start_timestamp ); |
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| 340 | $event['DTEND'] = date( 'Ymd\THis', $event_end_timestamp ); |
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| 341 | } |
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| 342 | if ( $this->timezone->getName() && 8 != strlen( $event['DTSTART'] ) ) { |
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| 343 | try { |
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| 344 | $adjusted_time = new DateTime( $event['DTSTART'], new DateTimeZone( $this->timezone->getName() ) ); |
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| 345 | $adjusted_time->setTimeZone( new DateTimeZone( 'UTC' ) ); |
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| 346 | $event['DTSTART'] = $adjusted_time->format('Ymd\THis'); |
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| 347 | |||
| 348 | $event['DTEND'] = date( 'Ymd\THis', strtotime( $event['DTSTART'] ) + $duration ); |
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| 349 | } catch ( Exception $e ) { |
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| 350 | // Invalid argument to DateTime |
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| 351 | } |
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| 352 | } |
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| 353 | $upcoming[] = $event; |
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| 354 | $count_counter++; |
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| 355 | } |
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| 356 | |||
| 357 | // Move forward one day |
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| 358 | $byday_event_date_start = strtotime( date( 'Ymd\T', strtotime( '+ 1 day', $event_start_timestamp ) ) . $start_time ); |
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| 359 | } |
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| 360 | |||
| 361 | // Restore first event timestamp |
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| 362 | $event_start_timestamp = strtotime( $recurring_event_date_start ); |
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| 363 | |||
| 364 | } else { |
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| 365 | |||
| 366 | $event_start_timestamp = strtotime( $recurring_event_date_start ); |
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| 367 | $start_time = date( 'His', $event_start_timestamp ); |
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| 368 | $event_end_timestamp = $event_start_timestamp + $duration; |
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| 369 | $end_time = date( 'His', $event_end_timestamp ); |
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| 370 | View Code Duplication | if ( 8 == strlen( $event['DTSTART'] ) ) { |
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| 371 | $exdate_compare = date( 'Ymd', $event_start_timestamp ); |
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| 372 | } else { |
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| 373 | $exdate_compare = date( 'Ymd\THis', $event_start_timestamp ); |
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| 374 | } |
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| 375 | |||
| 376 | View Code Duplication | if ( $event_end_timestamp > $current && $event_start_timestamp < $until && $count_counter <= $rrule_count && $event_start_timestamp >= $date_from_ics && ! in_array( $exdate_compare, $exdates ) ) { |
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| 377 | if ( 8 == strlen( $event['DTSTART'] ) ) { |
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| 378 | $event['DTSTART'] = date( 'Ymd', $event_start_timestamp ); |
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| 379 | $event['DTEND'] = date( 'Ymd', $event_end_timestamp ); |
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| 380 | } else { |
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| 381 | $event['DTSTART'] = date( 'Ymd\T', $event_start_timestamp ) . $start_time; |
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| 382 | $event['DTEND'] = date( 'Ymd\T', $event_end_timestamp ) . $end_time; |
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| 383 | } |
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| 384 | if ( $this->timezone->getName() && 8 != strlen( $event['DTSTART'] ) ) { |
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| 385 | try { |
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| 386 | $adjusted_time = new DateTime( $event['DTSTART'], new DateTimeZone( $this->timezone->getName() ) ); |
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| 387 | $adjusted_time->setTimeZone( new DateTimeZone( 'UTC' ) ); |
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| 388 | $event['DTSTART'] = $adjusted_time->format('Ymd\THis'); |
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| 389 | |||
| 390 | $event['DTEND'] = date( 'Ymd\THis', strtotime( $event['DTSTART'] ) + $duration ); |
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| 391 | } catch ( Exception $e ) { |
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| 392 | // Invalid argument to DateTime |
||
| 393 | } |
||
| 394 | } |
||
| 395 | $upcoming[] = $event; |
||
| 396 | $count_counter++; |
||
| 397 | } |
||
| 398 | } |
||
| 399 | |||
| 400 | // Set up next interval and reset $event['DTSTART'] and $event['DTEND'], keeping timestamps intact |
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| 401 | $next_start_timestamp = strtotime( "+ {$interval} {$frequency}s", $event_start_timestamp ); |
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| 402 | if ( 8 == strlen( $event['DTSTART'] ) ) { |
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| 403 | $event['DTSTART'] = date( 'Ymd', $next_start_timestamp ); |
||
| 404 | $event['DTEND'] = date( 'Ymd', strtotime( $event['DTSTART'] ) + $duration ); |
||
| 405 | View Code Duplication | } else { |
|
| 406 | $event['DTSTART'] = date( 'Ymd\THis', $next_start_timestamp ); |
||
| 407 | $event['DTEND'] = date( 'Ymd\THis', strtotime( $event['DTSTART'] ) + $duration ); |
||
| 408 | } |
||
| 409 | |||
| 410 | // Move recurring event date forward |
||
| 411 | $recurring_event_date_start = $event['DTSTART']; |
||
| 412 | } |
||
| 413 | $set_recurring_events[] = $uid; |
||
| 414 | |||
| 415 | } |
||
| 416 | |||
| 417 | View Code Duplication | } else { |
|
| 418 | // Process normal events |
||
| 419 | if ( strtotime( isset( $event['DTEND'] ) ? $event['DTEND'] : $event['DTSTART'] ) >= $current ) { |
||
| 420 | $upcoming[] = $event; |
||
| 421 | } |
||
| 422 | } |
||
| 423 | } |
||
| 424 | return $upcoming; |
||
| 425 | } |
||
| 426 | |||
| 427 | /** |
||
| 428 | * Parse events from an iCalendar feed |
||
| 429 | * |
||
| 430 | * @param string $url (default: '') |
||
| 431 | * @return array | false on failure |
||
| 432 | */ |
||
| 433 | public function parse( $url = '' ) { |
||
| 434 | $cache_group = 'icalendar_reader_parse'; |
||
| 435 | $disable_get_key = 'disable:' . md5( $url ); |
||
| 436 | |||
| 437 | // Check to see if previous attempts have failed |
||
| 438 | if ( false !== wp_cache_get( $disable_get_key, $cache_group ) ) |
||
| 439 | return false; |
||
| 440 | |||
| 441 | // rewrite webcal: URI schem to HTTP |
||
| 442 | $url = preg_replace('/^webcal/', 'http', $url ); |
||
|
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|||
| 443 | // try to fetch |
||
| 444 | $r = wp_remote_get( $url, array( 'timeout' => 3, 'sslverify' => false ) ); |
||
| 445 | if ( 200 !== wp_remote_retrieve_response_code( $r ) ) { |
||
| 446 | // We were unable to fetch any content, so don't try again for another 60 seconds |
||
| 447 | wp_cache_set( $disable_get_key, 1, $cache_group, 60 ); |
||
| 448 | return false; |
||
| 449 | } |
||
| 450 | |||
| 451 | $body = wp_remote_retrieve_body( $r ); |
||
| 452 | if ( empty( $body ) ) |
||
| 453 | return false; |
||
| 454 | |||
| 455 | $body = str_replace( "\r\n", "\n", $body ); |
||
| 456 | $lines = preg_split( "/\n(?=[A-Z])/", $body ); |
||
| 457 | |||
| 458 | if ( empty( $lines ) ) |
||
| 459 | return false; |
||
| 460 | |||
| 461 | if ( false === stristr( $lines[0], 'BEGIN:VCALENDAR' ) ) |
||
| 462 | return false; |
||
| 463 | |||
| 464 | foreach ( $lines as $line ) { |
||
| 465 | $add = $this->key_value_from_string( $line ); |
||
| 466 | if ( ! $add ) { |
||
| 467 | $this->add_component( $type, false, $line ); |
||
| 468 | continue; |
||
| 469 | } |
||
| 470 | list( $keyword, $value ) = $add; |
||
| 471 | |||
| 472 | switch ( $keyword ) { |
||
| 473 | case 'BEGIN': |
||
| 474 | case 'END': |
||
| 475 | switch ( $line ) { |
||
| 476 | case 'BEGIN:VTODO': |
||
| 477 | $this->todo_count++; |
||
| 478 | $type = 'VTODO'; |
||
| 479 | break; |
||
| 480 | case 'BEGIN:VEVENT': |
||
| 481 | $this->event_count++; |
||
| 482 | $type = 'VEVENT'; |
||
| 483 | break; |
||
| 484 | case 'BEGIN:VCALENDAR': |
||
| 485 | case 'BEGIN:DAYLIGHT': |
||
| 486 | case 'BEGIN:VTIMEZONE': |
||
| 487 | case 'BEGIN:STANDARD': |
||
| 488 | $type = $value; |
||
| 489 | break; |
||
| 490 | case 'END:VTODO': |
||
| 491 | case 'END:VEVENT': |
||
| 492 | case 'END:VCALENDAR': |
||
| 493 | case 'END:DAYLIGHT': |
||
| 494 | case 'END:VTIMEZONE': |
||
| 495 | case 'END:STANDARD': |
||
| 496 | $type = 'VCALENDAR'; |
||
| 497 | break; |
||
| 498 | } |
||
| 499 | break; |
||
| 500 | case 'TZID': |
||
| 501 | if ( 'VTIMEZONE' == $type && ! $this->timezone ) |
||
| 502 | $this->timezone = $this->timezone_from_string( $value ); |
||
| 503 | break; |
||
| 504 | case 'X-WR-TIMEZONE': |
||
| 505 | if ( ! $this->timezone ) |
||
| 506 | $this->timezone = $this->timezone_from_string( $value ); |
||
| 507 | break; |
||
| 508 | default: |
||
| 509 | $this->add_component( $type, $keyword, $value ); |
||
| 510 | break; |
||
| 511 | } |
||
| 512 | } |
||
| 513 | |||
| 514 | // Filter for RECURRENCE-IDs |
||
| 515 | $recurrences = array(); |
||
| 516 | if ( array_key_exists( 'VEVENT', $this->cal ) ) { |
||
| 517 | foreach ( $this->cal['VEVENT'] as $event ) { |
||
| 518 | if ( isset( $event['RECURRENCE-ID'] ) ) { |
||
| 519 | $recurrences[] = $event; |
||
| 520 | } |
||
| 521 | } |
||
| 522 | foreach ( $recurrences as $recurrence ) { |
||
| 523 | for ( $i = 0; $i < count( $this->cal['VEVENT'] ); $i++ ) { |
||
| 524 | if ( $this->cal['VEVENT'][ $i ]['UID'] == $recurrence['UID'] && ! isset( $this->cal['VEVENT'][ $i ]['RECURRENCE-ID'] ) ) { |
||
| 525 | $this->cal['VEVENT'][ $i ]['EXDATE'][] = $recurrence['RECURRENCE-ID']; |
||
| 526 | break; |
||
| 527 | } |
||
| 528 | } |
||
| 529 | } |
||
| 530 | } |
||
| 531 | |||
| 532 | return $this->cal; |
||
| 533 | } |
||
| 534 | |||
| 535 | /** |
||
| 536 | * Parse key:value from a string |
||
| 537 | * |
||
| 538 | * @param string $text (default: '') |
||
| 539 | * @return array |
||
| 540 | */ |
||
| 541 | public function key_value_from_string( $text = '' ) { |
||
| 542 | preg_match( '/([^:]+)(;[^:]+)?[:]([\w\W]*)/', $text, $matches ); |
||
| 543 | |||
| 544 | if ( 0 == count( $matches ) ) |
||
| 545 | return false; |
||
| 546 | |||
| 547 | return array( $matches[1], $matches[3] ); |
||
| 548 | } |
||
| 549 | |||
| 550 | /** |
||
| 551 | * Convert a timezone name into a timezone object. |
||
| 552 | * |
||
| 553 | * @param string $text Timezone name. Example: America/Chicago |
||
| 554 | * @return object|null A DateTimeZone object if the conversion was successful. |
||
| 555 | */ |
||
| 556 | private function timezone_from_string( $text ) { |
||
| 557 | try { |
||
| 558 | $timezone = new DateTimeZone( $text ); |
||
| 559 | } catch ( Exception $e ) { |
||
| 560 | $blog_timezone = get_option( 'timezone_string' ); |
||
| 561 | if ( ! $blog_timezone ) { |
||
| 562 | $blog_timezone = 'Etc/UTC'; |
||
| 563 | } |
||
| 564 | |||
| 565 | $timezone = new DateTimeZone( $blog_timezone ); |
||
| 566 | } |
||
| 567 | |||
| 568 | return $timezone; |
||
| 569 | } |
||
| 570 | |||
| 571 | /** |
||
| 572 | * Add a component to the calendar array |
||
| 573 | * |
||
| 574 | * @param string $component (default: '') |
||
| 575 | * @param string $keyword (default: '') |
||
| 576 | * @param string $value (default: '') |
||
| 577 | * @return void |
||
| 578 | */ |
||
| 579 | public function add_component( $component = '', $keyword = '', $value = '' ) { |
||
| 580 | if ( false == $keyword ) { |
||
| 581 | $keyword = $this->last_keyword; |
||
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|||
| 582 | switch ( $component ) { |
||
| 583 | case 'VEVENT': |
||
| 584 | $value = $this->cal[ $component ][ $this->event_count - 1 ][ $keyword ] . $value; |
||
|
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|||
| 585 | break; |
||
| 586 | case 'VTODO' : |
||
| 587 | $value = $this->cal[ $component ][ $this->todo_count - 1 ][ $keyword ] . $value; |
||
|
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|||
| 588 | break; |
||
| 589 | } |
||
| 590 | } |
||
| 591 | |||
| 592 | /* |
||
| 593 | * Some events have a specific timezone set in their start/end date, |
||
| 594 | * and it may or may not be different than the calendar timzeone. |
||
| 595 | * Valid formats include: |
||
| 596 | * DTSTART;TZID=Pacific Standard Time:20141219T180000 |
||
| 597 | * DTEND;TZID=Pacific Standard Time:20141219T200000 |
||
| 598 | * EXDATE:19960402T010000Z,19960403T010000Z,19960404T010000Z |
||
| 599 | * EXDATE;VALUE=DATE:2015050 |
||
| 600 | * EXDATE;TZID=America/New_York:20150424T170000 |
||
| 601 | * EXDATE;TZID=Pacific Standard Time:20120615T140000,20120629T140000,20120706T140000 |
||
| 602 | */ |
||
| 603 | |||
| 604 | // Always store EXDATE as an array |
||
| 605 | if ( stristr( $keyword, 'EXDATE' ) ) { |
||
| 606 | $value = explode( ',', $value ); |
||
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|||
| 607 | } |
||
| 608 | |||
| 609 | // Adjust DTSTART, DTEND, and EXDATE according to their TZID if set |
||
| 610 | if ( strpos( $keyword, ';' ) && ( stristr( $keyword, 'DTSTART' ) || stristr( $keyword, 'DTEND' ) || stristr( $keyword, 'EXDATE' ) || stristr( $keyword, 'RECURRENCE-ID' ) ) ) { |
||
| 611 | $keyword = explode( ';', $keyword ); |
||
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|||
| 612 | |||
| 613 | $tzid = false; |
||
| 614 | if ( 2 == count( $keyword ) ) { |
||
| 615 | $tparam = $keyword[1]; |
||
| 616 | |||
| 617 | if ( strpos( $tparam, "TZID" ) !== false ) { |
||
| 618 | $tzid = $this->timezone_from_string( str_replace( 'TZID=', '', $tparam ) ); |
||
| 619 | } |
||
| 620 | } |
||
| 621 | |||
| 622 | // Normalize all times to default UTC |
||
| 623 | if ( $tzid ) { |
||
| 624 | $adjusted_times = array(); |
||
| 625 | foreach ( (array) $value as $v ) { |
||
| 626 | try { |
||
| 627 | $adjusted_time = new DateTime( $v, $tzid ); |
||
| 628 | $adjusted_time->setTimeZone( new DateTimeZone( 'UTC' ) ); |
||
| 629 | $adjusted_times[] = $adjusted_time->format('Ymd\THis'); |
||
| 630 | } catch ( Exception $e ) { |
||
| 631 | // Invalid argument to DateTime |
||
| 632 | return; |
||
| 633 | } |
||
| 634 | } |
||
| 635 | $value = $adjusted_times; |
||
|
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|
|||
| 636 | } |
||
| 637 | |||
| 638 | // Format for adding to event |
||
| 639 | $keyword = $keyword[0]; |
||
|
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|
|||
| 640 | if ( 'EXDATE' != $keyword ) { |
||
| 641 | $value = implode( (array) $value ); |
||
|
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|
|||
| 642 | } |
||
| 643 | } |
||
| 644 | |||
| 645 | foreach ( (array) $value as $v ) { |
||
| 646 | switch ($component) { |
||
| 647 | View Code Duplication | case 'VTODO': |
|
| 648 | if ( 'EXDATE' == $keyword ) { |
||
| 649 | $this->cal[ $component ][ $this->todo_count - 1 ][ $keyword ][] = $v; |
||
| 650 | } else { |
||
| 651 | $this->cal[ $component ][ $this->todo_count - 1 ][ $keyword ] = $v; |
||
| 652 | } |
||
| 653 | break; |
||
| 654 | View Code Duplication | case 'VEVENT': |
|
| 655 | if ( 'EXDATE' == $keyword ) { |
||
| 656 | $this->cal[ $component ][ $this->event_count - 1 ][ $keyword ][] = $v; |
||
| 657 | } else { |
||
| 658 | $this->cal[ $component ][ $this->event_count - 1 ][ $keyword ] = $v; |
||
| 659 | } |
||
| 660 | break; |
||
| 661 | default: |
||
| 662 | $this->cal[ $component ][ $keyword ] = $v; |
||
| 663 | break; |
||
| 664 | } |
||
| 665 | } |
||
| 666 | $this->last_keyword = $keyword; |
||
| 667 | } |
||
| 668 | |||
| 669 | /** |
||
| 670 | * Escape strings with wp_kses, allow links |
||
| 671 | * |
||
| 672 | * @param string $string (default: '') |
||
| 673 | * @return string |
||
| 674 | */ |
||
| 675 | public function escape( $string = '' ) { |
||
| 676 | // Unfold content lines per RFC 5545 |
||
| 677 | $string = str_replace( "\n\t", '', $string ); |
||
|
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|
|||
| 678 | $string = str_replace( "\n ", '', $string ); |
||
|
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|
|||
| 679 | |||
| 680 | $allowed_html = array( |
||
| 681 | 'a' => array( |
||
| 682 | 'href' => array(), |
||
| 683 | 'title' => array() |
||
| 684 | ) |
||
| 685 | ); |
||
| 686 | |||
| 687 | $allowed_tags = ''; |
||
| 688 | foreach ( array_keys( $allowed_html ) as $tag ) { |
||
| 689 | $allowed_tags .= "<{$tag}>"; |
||
| 690 | } |
||
| 691 | |||
| 692 | // Running strip_tags() first with allowed tags to get rid of remaining gallery markup, etc |
||
| 693 | // because wp_kses() would only htmlentity'fy that. Then still running wp_kses(), for extra |
||
| 694 | // safety and good measure. |
||
| 695 | return wp_kses( strip_tags( $string, $allowed_tags ), $allowed_html ); |
||
| 696 | } |
||
| 697 | |||
| 698 | /** |
||
| 699 | * Render the events |
||
| 700 | * |
||
| 701 | * @param string $url (default: '') |
||
| 702 | * @param string $context (default: 'widget') or 'shortcode' |
||
| 703 | * @return mixed bool|string false on failure, rendered HTML string on success. |
||
| 704 | */ |
||
| 705 | public function render( $url = '', $args = array() ) { |
||
| 706 | |||
| 707 | $args = wp_parse_args( $args, array( |
||
|
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|
|||
| 708 | 'context' => 'widget', |
||
| 709 | 'number' => 5 |
||
| 710 | ) ); |
||
| 711 | |||
| 712 | $events = $this->get_events( $url, $args['number'] ); |
||
| 713 | |||
| 714 | if ( empty( $events ) ) |
||
| 715 | return false; |
||
| 716 | |||
| 717 | ob_start(); |
||
| 718 | |||
| 719 | if ( 'widget' == $args['context'] ) : ?> |
||
| 720 | <ul class="upcoming-events"> |
||
| 721 | <?php foreach ( $events as $event ) : ?> |
||
| 722 | <li> |
||
| 723 | <strong class="event-summary"><?php echo $this->escape( stripslashes( $event['SUMMARY'] ) ); ?></strong> |
||
| 724 | <span class="event-when"><?php echo $this->formatted_date( $event ); ?></span> |
||
| 725 | <?php if ( ! empty( $event['LOCATION'] ) ) : ?> |
||
| 726 | <span class="event-location"><?php echo $this->escape( stripslashes( $event['LOCATION'] ) ); ?></span> |
||
| 727 | <?php endif; ?> |
||
| 728 | <?php if ( ! empty( $event['DESCRIPTION'] ) ) : ?> |
||
| 729 | <span class="event-description"><?php echo wp_trim_words( $this->escape( stripcslashes( $event['DESCRIPTION'] ) ) ); ?></span> |
||
| 730 | <?php endif; ?> |
||
| 731 | </li> |
||
| 732 | <?php endforeach; ?> |
||
| 733 | </ul> |
||
| 734 | <?php endif; |
||
| 735 | |||
| 736 | if ( 'shortcode' == $args['context'] ) : ?> |
||
| 737 | <table class="upcoming-events"> |
||
| 738 | <thead> |
||
| 739 | <tr> |
||
| 740 | <th>Location</th> |
||
| 741 | <th>When</th> |
||
| 742 | <th>Summary</th> |
||
| 743 | <th>Description</th> |
||
| 744 | </tr> |
||
| 745 | </thead> |
||
| 746 | <tbody> |
||
| 747 | <?php foreach ( $events as $event ) : ?> |
||
| 748 | <tr> |
||
| 749 | <td><?php echo $this->escape( stripslashes( $event['LOCATION'] ) ); ?></td> |
||
| 750 | <td><?php echo $this->formatted_date( $event ); ?></td> |
||
| 751 | <td><?php echo $this->escape( stripslashes( $event['SUMMARY'] ) ); ?></td> |
||
| 752 | <td><?php echo wp_trim_words( $this->escape( stripcslashes( $event['DESCRIPTION'] ) ) ); ?></td> |
||
| 753 | </tr> |
||
| 754 | <?php endforeach; ?> |
||
| 755 | </tbody> |
||
| 756 | </table> |
||
| 757 | <?php endif; |
||
| 758 | |||
| 759 | $rendered = ob_get_clean(); |
||
| 760 | |||
| 761 | if ( empty( $rendered ) ) |
||
| 762 | return false; |
||
| 763 | |||
| 764 | return $rendered; |
||
| 765 | } |
||
| 766 | |||
| 767 | public function formatted_date( $event ) { |
||
| 768 | |||
| 769 | $date_format = get_option( 'date_format' ); |
||
| 770 | $time_format = get_option( 'time_format' ); |
||
| 771 | $start = strtotime( $event['DTSTART'] ); |
||
| 772 | $end = isset( $event['DTEND'] ) ? strtotime( $event['DTEND'] ) : false; |
||
| 773 | |||
| 774 | $all_day = ( 8 == strlen( $event['DTSTART'] ) ); |
||
| 775 | |||
| 776 | if ( !$all_day && $this->timezone ) { |
||
| 777 | try { |
||
| 778 | $start_time = new DateTime( $event['DTSTART'] ); |
||
| 779 | $timezone_offset = $this->timezone->getOffset( $start_time ); |
||
| 780 | $start += $timezone_offset; |
||
| 781 | |||
| 782 | if ( $end ) { |
||
| 783 | $end += $timezone_offset; |
||
| 784 | } |
||
| 785 | } catch ( Exception $e ) { |
||
| 786 | // Invalid argument to DateTime |
||
| 787 | } |
||
| 788 | } |
||
| 789 | $single_day = $end ? ( $end - $start ) <= DAY_IN_SECONDS : true; |
||
| 790 | |||
| 791 | /* Translators: Date and time */ |
||
| 792 | $date_with_time = __( '%1$s at %2$s' , 'jetpack' ); |
||
| 793 | /* Translators: Two dates with a separator */ |
||
| 794 | $two_dates = __( '%1$s – %2$s' , 'jetpack' ); |
||
| 795 | |||
| 796 | // we'll always have the start date. Maybe with time |
||
| 797 | View Code Duplication | if ( $all_day ) |
|
| 798 | $date = date_i18n( $date_format, $start ); |
||
| 799 | else |
||
| 800 | $date = sprintf( $date_with_time, date_i18n( $date_format, $start ), date_i18n( $time_format, $start ) ); |
||
| 801 | |||
| 802 | // single day, timed |
||
| 803 | if ( $single_day && ! $all_day && false !== $end ) |
||
| 804 | $date = sprintf( $two_dates, $date, date_i18n( $time_format, $end ) ); |
||
| 805 | |||
| 806 | // multi-day |
||
| 807 | if ( ! $single_day ) { |
||
| 808 | |||
| 809 | View Code Duplication | if ( $all_day ) { |
|
| 810 | // DTEND for multi-day events represents "until", not "including", so subtract one minute |
||
| 811 | $end_date = date_i18n( $date_format, $end - 60 ); |
||
| 812 | } else { |
||
| 813 | $end_date = sprintf( $date_with_time, date_i18n( $date_format, $end ), date_i18n( $time_format, $end ) ); |
||
| 814 | } |
||
| 815 | |||
| 816 | $date = sprintf( $two_dates, $date, $end_date ); |
||
| 817 | |||
| 818 | } |
||
| 819 | |||
| 820 | return $date; |
||
| 821 | } |
||
| 822 | |||
| 823 | protected function sort_by_recent( $list ) { |
||
| 824 | $dates = $sorted_list = array(); |
||
| 825 | |||
| 826 | foreach ( $list as $key => $row ) { |
||
| 827 | $date = $row['DTSTART']; |
||
| 828 | // pad some time onto an all day date |
||
| 829 | if ( 8 === strlen( $date ) ) |
||
| 830 | $date .= 'T000000Z'; |
||
| 831 | $dates[$key] = $date; |
||
| 832 | } |
||
| 833 | asort( $dates ); |
||
| 834 | foreach( $dates as $key => $value ) { |
||
| 835 | $sorted_list[$key] = $list[$key]; |
||
| 836 | } |
||
| 837 | unset($list); |
||
| 838 | return $sorted_list; |
||
| 839 | } |
||
| 840 | |||
| 841 | } |
||
| 842 | |||
| 843 | |||
| 844 | /** |
||
| 845 | * Wrapper function for iCalendarReader->get_events() |
||
| 846 | * |
||
| 847 | * @param string $url (default: '') |
||
| 848 | * @return array |
||
| 849 | */ |
||
| 850 | function icalendar_get_events( $url = '', $count = 5 ) { |
||
| 851 | // Find your calendar's address http://support.google.com/calendar/bin/answer.py?hl=en&answer=37103 |
||
| 852 | $ical = new iCalendarReader(); |
||
| 853 | return $ical->get_events( $url, $count ); |
||
| 854 | } |
||
| 855 | |||
| 856 | /** |
||
| 857 | * Wrapper function for iCalendarReader->render() |
||
| 858 | * |
||
| 859 | * @param string $url (default: '') |
||
| 860 | * @param string $context (default: 'widget') or 'shortcode' |
||
| 861 | * @return mixed bool|string false on failure, rendered HTML string on success. |
||
| 862 | */ |
||
| 863 | function icalendar_render_events( $url = '', $args = array() ) { |
||
| 864 | $ical = new iCalendarReader(); |
||
| 865 | return $ical->render( $url, $args ); |
||
| 866 | } |
||
| 867 |