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icalendar-reader.php
1094 lines
| 1 | <?php // phpcs:ignore WordPress.Files.FileName.InvalidClassFileName |
| 2 | /** |
| 3 | * Get and render iCal feeds. |
| 4 | * Used by the Upcoming Events widget and the [upcomingevents] shortcode. |
| 5 | * |
| 6 | * @package automattic/jetpack |
| 7 | */ |
| 8 | |
| 9 | // phpcs:disable Universal.Files.SeparateFunctionsFromOO.Mixed -- TODO: Move classes to appropriately-named class files. |
| 10 | |
| 11 | /** |
| 12 | * Calendar utilities class. |
| 13 | * |
| 14 | * phpcs:disable PEAR.NamingConventions.ValidClassName.StartWithCapital |
| 15 | */ |
| 16 | class iCalendarReader { |
| 17 | // phpcs:enable PEAR.NamingConventions.ValidClassName.StartWithCapital |
| 18 | // phpcs:disable WordPress.DateTime.RestrictedFunctions.date_date -- we manually handle timezones all over the file. |
| 19 | // @todo Verify that we're manually handling timezones *correctly*. We probably need more `DateTime` with `$this->timezone` and maybe `wp_date()` and less `strtotime()` and `date()` and `date_i18n()`. |
| 20 | /** |
| 21 | * Count To Do events in calendar. |
| 22 | * |
| 23 | * @var int |
| 24 | */ |
| 25 | public $todo_count = 0; |
| 26 | |
| 27 | /** |
| 28 | * How many events can be found in calendar. |
| 29 | * |
| 30 | * @var int |
| 31 | */ |
| 32 | public $event_count = 0; |
| 33 | |
| 34 | /** |
| 35 | * Details about our calendar. |
| 36 | * |
| 37 | * @var array |
| 38 | */ |
| 39 | public $cal = array(); |
| 40 | |
| 41 | /** |
| 42 | * Timezone parsed from the iCalendar feed, if any. |
| 43 | * |
| 44 | * @var null|DateTimeZone |
| 45 | */ |
| 46 | public $timezone = null; |
| 47 | |
| 48 | /** |
| 49 | * Last iCalendar keyword parsed. |
| 50 | * |
| 51 | * @var string |
| 52 | */ |
| 53 | public $last_keyword; |
| 54 | |
| 55 | /** |
| 56 | * Class constructor |
| 57 | * |
| 58 | * @return void |
| 59 | */ |
| 60 | public function __construct() {} |
| 61 | |
| 62 | /** |
| 63 | * Return an array of events |
| 64 | * |
| 65 | * @param string $url (default: '') URL of the iCal feed. |
| 66 | * @param int $count Count the number of events. |
| 67 | * |
| 68 | * @return array | false on failure |
| 69 | */ |
| 70 | public function get_events( $url = '', $count = 5 ) { |
| 71 | $count = (int) $count; |
| 72 | $transient_id = 'icalendar_vcal_' . md5( $url ) . '_' . $count; |
| 73 | |
| 74 | $vcal = get_transient( $transient_id ); |
| 75 | if ( ! empty( $vcal ) ) { |
| 76 | if ( isset( $vcal['TIMEZONE'] ) ) { |
| 77 | $this->timezone = $this->timezone_from_string( $vcal['TIMEZONE'] ); |
| 78 | } |
| 79 | |
| 80 | if ( isset( $vcal['VEVENT'] ) ) { |
| 81 | $vevent = $vcal['VEVENT']; |
| 82 | |
| 83 | if ( $count > 0 ) { |
| 84 | $vevent = array_slice( $vevent, 0, $count ); |
| 85 | } |
| 86 | |
| 87 | $this->cal['VEVENT'] = $vevent; |
| 88 | |
| 89 | return $this->cal['VEVENT']; |
| 90 | } |
| 91 | } |
| 92 | |
| 93 | if ( ! $this->parse( $url ) ) { |
| 94 | return false; |
| 95 | } |
| 96 | |
| 97 | $vcal = array(); |
| 98 | |
| 99 | if ( $this->timezone ) { |
| 100 | $vcal['TIMEZONE'] = $this->timezone->getName(); |
| 101 | } else { |
| 102 | $this->timezone = $this->timezone_from_string( '' ); |
| 103 | } |
| 104 | |
| 105 | if ( ! empty( $this->cal['VEVENT'] ) ) { |
| 106 | $vevent = $this->cal['VEVENT']; |
| 107 | |
| 108 | // check for recurring events. |
| 109 | // $vevent = $this->add_recurring_events( $vevent );. |
| 110 | |
| 111 | // remove before caching - no sense in hanging onto the past. |
| 112 | $vevent = $this->filter_past_and_recurring_events( $vevent ); |
| 113 | |
| 114 | // order by soonest start date. |
| 115 | $vevent = $this->sort_by_recent( $vevent ); |
| 116 | |
| 117 | $vcal['VEVENT'] = $vevent; |
| 118 | } |
| 119 | |
| 120 | set_transient( $transient_id, $vcal, HOUR_IN_SECONDS ); |
| 121 | |
| 122 | if ( ! isset( $vcal['VEVENT'] ) ) { |
| 123 | return false; |
| 124 | } |
| 125 | |
| 126 | if ( $count > 0 ) { |
| 127 | return array_slice( $vcal['VEVENT'], 0, $count ); |
| 128 | } |
| 129 | |
| 130 | return $vcal['VEVENT']; |
| 131 | } |
| 132 | |
| 133 | /** |
| 134 | * Adjust event's time based on site's timezone. |
| 135 | * |
| 136 | * @param array $events Array of events. |
| 137 | * |
| 138 | * @return array |
| 139 | */ |
| 140 | public function apply_timezone_offset( $events ) { |
| 141 | if ( ! $events ) { |
| 142 | return $events; |
| 143 | } |
| 144 | |
| 145 | // get timezone offset from the timezone name. |
| 146 | $timezone = wp_timezone(); |
| 147 | |
| 148 | $offsetted_events = array(); |
| 149 | |
| 150 | foreach ( $events as $event ) { |
| 151 | // Don't handle all-day events. |
| 152 | if ( 8 < strlen( $event['DTSTART'] ) ) { |
| 153 | $start_time = preg_replace( '/Z$/', '', $event['DTSTART'] ); |
| 154 | $start_time = new DateTime( $start_time, $this->timezone ); |
| 155 | $start_time->setTimeZone( $timezone ); |
| 156 | $event['DTSTART'] = $start_time->format( 'YmdHis\Z' ); |
| 157 | if ( isset( $event['DTEND'] ) ) { |
| 158 | $end_time = preg_replace( '/Z$/', '', $event['DTEND'] ); |
| 159 | $end_time = new DateTime( $end_time, $this->timezone ); |
| 160 | $end_time->setTimeZone( $timezone ); |
| 161 | $event['DTEND'] = $end_time->format( 'YmdHis\Z' ); |
| 162 | } |
| 163 | } |
| 164 | |
| 165 | $offsetted_events[] = $event; |
| 166 | } |
| 167 | |
| 168 | return $offsetted_events; |
| 169 | } |
| 170 | |
| 171 | /** |
| 172 | * Reorganize events into an array of events with standardized data. |
| 173 | * |
| 174 | * @param array $events Array of events. |
| 175 | * |
| 176 | * @return array |
| 177 | */ |
| 178 | protected function filter_past_and_recurring_events( $events ) { |
| 179 | $upcoming = array(); |
| 180 | $set_recurring_events = array(); |
| 181 | /** |
| 182 | * This filter allows any time to be passed in for testing or changing timezones, etc... |
| 183 | * |
| 184 | * @module widgets |
| 185 | * |
| 186 | * @since 3.4.0 |
| 187 | * |
| 188 | * @param object time() A time object. |
| 189 | */ |
| 190 | $current = apply_filters( 'ical_get_current_time', time() ); |
| 191 | |
| 192 | foreach ( $events as $event ) { |
| 193 | |
| 194 | $date_from_ics = strtotime( $event['DTSTART'] ); |
| 195 | if ( isset( $event['DTEND'] ) ) { |
| 196 | $duration = strtotime( $event['DTEND'] ) - strtotime( $event['DTSTART'] ); |
| 197 | } else { |
| 198 | $duration = 0; |
| 199 | } |
| 200 | |
| 201 | if ( isset( $event['RRULE'] ) && $this->timezone->getName() && 8 !== strlen( $event['DTSTART'] ) ) { |
| 202 | try { |
| 203 | $adjusted_time = new DateTime( $event['DTSTART'], new DateTimeZone( 'UTC' ) ); |
| 204 | $adjusted_time->setTimeZone( new DateTimeZone( $this->timezone->getName() ) ); |
| 205 | $event['DTSTART'] = $adjusted_time->format( 'Ymd\THis' ); |
| 206 | $date_from_ics = strtotime( $event['DTSTART'] ); |
| 207 | |
| 208 | $event['DTEND'] = date( 'Ymd\THis', strtotime( $event['DTSTART'] ) + $duration ); |
| 209 | } catch ( Exception $e ) { // phpcs:ignore Generic.CodeAnalysis.EmptyStatement.DetectedCatch |
| 210 | // Invalid argument to DateTime. |
| 211 | } |
| 212 | |
| 213 | if ( isset( $event['EXDATE'] ) ) { |
| 214 | $exdates = array(); |
| 215 | foreach ( (array) $event['EXDATE'] as $exdate ) { |
| 216 | try { |
| 217 | $adjusted_time = new DateTime( $exdate, new DateTimeZone( 'UTC' ) ); |
| 218 | $adjusted_time->setTimeZone( new DateTimeZone( $this->timezone->getName() ) ); |
| 219 | if ( 8 === strlen( $event['DTSTART'] ) ) { |
| 220 | $exdates[] = $adjusted_time->format( 'Ymd' ); |
| 221 | } else { |
| 222 | $exdates[] = $adjusted_time->format( 'Ymd\THis' ); |
| 223 | } |
| 224 | } catch ( Exception $e ) { // phpcs:ignore Generic.CodeAnalysis.EmptyStatement.DetectedCatch |
| 225 | // Invalid argument to DateTime. |
| 226 | } |
| 227 | } |
| 228 | $event['EXDATE'] = $exdates; |
| 229 | } else { |
| 230 | $event['EXDATE'] = array(); |
| 231 | } |
| 232 | } |
| 233 | |
| 234 | if ( ! isset( $event['DTSTART'] ) ) { |
| 235 | continue; |
| 236 | } |
| 237 | |
| 238 | // Process events with RRULE before other events. |
| 239 | $rrule = $event['RRULE'] ?? false; |
| 240 | $uid = $event['UID'] ?? false; |
| 241 | |
| 242 | if ( $rrule && $uid && ! in_array( $uid, $set_recurring_events, true ) ) { |
| 243 | |
| 244 | // Break down the RRULE into digestible chunks. |
| 245 | $rrule_array = array(); |
| 246 | |
| 247 | foreach ( explode( ';', $event['RRULE'] ) as $rline ) { |
| 248 | list( $rkey, $rvalue ) = explode( '=', $rline, 2 ); |
| 249 | $rrule_array[ $rkey ] = $rvalue; |
| 250 | } |
| 251 | |
| 252 | $interval = $rrule_array['INTERVAL'] ?? 1; |
| 253 | $rrule_count = $rrule_array['COUNT'] ?? 0; |
| 254 | $until = ( isset( $rrule_array['UNTIL'] ) ) ? strtotime( $rrule_array['UNTIL'] ) : strtotime( '+1 year', $current ); |
| 255 | |
| 256 | // Used to bound event checks. |
| 257 | $echo_limit = 10; |
| 258 | $noop = false; |
| 259 | |
| 260 | // Set bydays for the event. |
| 261 | $weekdays = array( 'SU', 'MO', 'TU', 'WE', 'TH', 'FR', 'SA' ); |
| 262 | $bydays = $weekdays; |
| 263 | |
| 264 | // Calculate a recent start date for incrementing depending on the frequency and interval. |
| 265 | switch ( $rrule_array['FREQ'] ) { |
| 266 | |
| 267 | case 'DAILY': |
| 268 | $frequency = 'day'; |
| 269 | $echo_limit = 10; |
| 270 | |
| 271 | if ( $date_from_ics >= $current ) { |
| 272 | $recurring_event_date_start = date( 'Ymd\THis', strtotime( $event['DTSTART'] ) ); |
| 273 | } else { |
| 274 | // Interval and count. |
| 275 | $catchup = floor( ( $current - strtotime( $event['DTSTART'] ) ) / ( $interval * DAY_IN_SECONDS ) ); |
| 276 | if ( $rrule_count && $catchup > 0 ) { |
| 277 | if ( $catchup < $rrule_count ) { |
| 278 | $rrule_count -= $catchup; |
| 279 | $recurring_event_date_start = date( |
| 280 | 'Ymd', |
| 281 | strtotime( |
| 282 | '+ ' . ( $interval * $catchup ) . ' days', |
| 283 | strtotime( $event['DTSTART'] ) |
| 284 | ) |
| 285 | ) . date( |
| 286 | '\THis', |
| 287 | strtotime( $event['DTSTART'] ) |
| 288 | ); |
| 289 | } else { |
| 290 | $noop = true; |
| 291 | } |
| 292 | } else { |
| 293 | $recurring_event_date_start = date( |
| 294 | 'Ymd', |
| 295 | strtotime( |
| 296 | '+ ' . ( $interval * $catchup ) . ' days', |
| 297 | strtotime( $event['DTSTART'] ) |
| 298 | ) |
| 299 | ) . date( |
| 300 | '\THis', |
| 301 | strtotime( $event['DTSTART'] ) |
| 302 | ); |
| 303 | } |
| 304 | } |
| 305 | break; |
| 306 | |
| 307 | case 'WEEKLY': |
| 308 | $frequency = 'week'; |
| 309 | $echo_limit = 4; |
| 310 | |
| 311 | // BYDAY exception to current date. |
| 312 | $day = false; |
| 313 | if ( ! isset( $rrule_array['BYDAY'] ) ) { |
| 314 | $rrule_array['BYDAY'] = strtoupper( substr( date( 'D', strtotime( $event['DTSTART'] ) ), 0, 2 ) ); |
| 315 | $day = $rrule_array['BYDAY']; |
| 316 | } |
| 317 | $bydays = explode( ',', $rrule_array['BYDAY'] ); |
| 318 | |
| 319 | if ( $date_from_ics >= $current ) { |
| 320 | $recurring_event_date_start = date( 'Ymd\THis', strtotime( $event['DTSTART'] ) ); |
| 321 | } else { |
| 322 | // Interval and count. |
| 323 | $catchup = floor( ( $current - strtotime( $event['DTSTART'] ) ) / ( $interval * WEEK_IN_SECONDS ) ); |
| 324 | if ( $rrule_count && $catchup > 0 ) { |
| 325 | if ( ( $catchup * count( $bydays ) ) < $rrule_count ) { |
| 326 | $rrule_count -= $catchup * count( $bydays ); // Estimate current event count. |
| 327 | $recurring_event_date_start = date( 'Ymd', strtotime( '+ ' . ( $interval * $catchup ) . ' weeks', strtotime( $event['DTSTART'] ) ) ) . date( '\THis', strtotime( $event['DTSTART'] ) ); |
| 328 | } else { |
| 329 | $noop = true; |
| 330 | } |
| 331 | } else { |
| 332 | $recurring_event_date_start = date( 'Ymd', strtotime( '+ ' . ( $interval * $catchup ) . ' weeks', strtotime( $event['DTSTART'] ) ) ) . date( '\THis', strtotime( $event['DTSTART'] ) ); |
| 333 | } |
| 334 | } |
| 335 | |
| 336 | // Set to Sunday start. |
| 337 | if ( ! $noop && 'SU' !== strtoupper( substr( date( 'D', strtotime( $recurring_event_date_start ) ), 0, 2 ) ) ) { |
| 338 | $recurring_event_date_start = date( 'Ymd', strtotime( 'last Sunday', strtotime( $recurring_event_date_start ) ) ) . date( '\THis', strtotime( $event['DTSTART'] ) ); |
| 339 | } |
| 340 | break; |
| 341 | |
| 342 | case 'MONTHLY': |
| 343 | $frequency = 'month'; |
| 344 | $echo_limit = 1; |
| 345 | |
| 346 | if ( $date_from_ics >= $current ) { |
| 347 | $recurring_event_date_start = date( 'Ymd\THis', strtotime( $event['DTSTART'] ) ); |
| 348 | } else { |
| 349 | // Describe the date in the month. |
| 350 | if ( isset( $rrule_array['BYDAY'] ) |
| 351 | && preg_match( '/^(-?\d)([A-Z]{2})/', $rrule_array['BYDAY'], $matches ) |
| 352 | ) { |
| 353 | $day_number = $matches[1]; |
| 354 | $week_day = $matches[2]; |
| 355 | |
| 356 | $day_cardinals = array( |
| 357 | -3 => 'third to last', |
| 358 | -2 => 'second to last', |
| 359 | -1 => 'last', |
| 360 | 1 => 'first', |
| 361 | 2 => 'second', |
| 362 | 3 => 'third', |
| 363 | 4 => 'fourth', |
| 364 | 5 => 'fifth', |
| 365 | ); |
| 366 | $weekdays = array( |
| 367 | 'SU' => 'Sunday', |
| 368 | 'MO' => 'Monday', |
| 369 | 'TU' => 'Tuesday', |
| 370 | 'WE' => 'Wednesday', |
| 371 | 'TH' => 'Thursday', |
| 372 | 'FR' => 'Friday', |
| 373 | 'SA' => 'Saturday', |
| 374 | ); |
| 375 | |
| 376 | $day_cardinal = $day_cardinals[ $day_number ] ?? ''; |
| 377 | $weekday = $weekdays[ $week_day ] ?? ''; |
| 378 | $event_date_desc = "$day_cardinal $weekday of "; |
| 379 | } else { |
| 380 | $event_date_desc = date( 'd ', strtotime( $event['DTSTART'] ) ); |
| 381 | } |
| 382 | |
| 383 | // Interval only. |
| 384 | if ( $interval > 1 ) { |
| 385 | $catchup = 0; |
| 386 | $maybe = strtotime( $event['DTSTART'] ); |
| 387 | while ( $maybe < $current ) { |
| 388 | $maybe = strtotime( '+ ' . ( $interval * $catchup ) . ' months', strtotime( $event['DTSTART'] ) ); |
| 389 | ++$catchup; |
| 390 | } |
| 391 | $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'] ) ); |
| 392 | } else { |
| 393 | $recurring_event_date_start = date( 'Ymd', strtotime( $event_date_desc . date( 'F Y', $current ) ) ) . date( '\THis', strtotime( $event['DTSTART'] ) ); |
| 394 | } |
| 395 | |
| 396 | // Add one interval if necessary. |
| 397 | if ( strtotime( $recurring_event_date_start ) < $current ) { |
| 398 | if ( $interval > 1 ) { |
| 399 | $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'] ) ); |
| 400 | } else { |
| 401 | try { |
| 402 | $adjustment = new DateTime( date( 'Y-m-d', $current ) ); |
| 403 | $adjustment->modify( 'first day of next month' ); |
| 404 | $recurring_event_date_start = date( 'Ymd', strtotime( $event_date_desc . $adjustment->format( 'F Y' ) ) ) . date( '\THis', strtotime( $event['DTSTART'] ) ); |
| 405 | } catch ( Exception $e ) { // phpcs:ignore Generic.CodeAnalysis.EmptyStatement.DetectedCatch |
| 406 | // Invalid argument to DateTime. |
| 407 | } |
| 408 | } |
| 409 | } |
| 410 | } |
| 411 | break; |
| 412 | |
| 413 | case 'YEARLY': |
| 414 | $frequency = 'year'; |
| 415 | $echo_limit = 1; |
| 416 | |
| 417 | if ( $date_from_ics >= $current ) { |
| 418 | $recurring_event_date_start = date( 'Ymd\THis', strtotime( $event['DTSTART'] ) ); |
| 419 | } else { |
| 420 | $recurring_event_date_start = date( 'Y', $current ) . date( 'md\THis', strtotime( $event['DTSTART'] ) ); |
| 421 | if ( strtotime( $recurring_event_date_start ) < $current ) { |
| 422 | try { |
| 423 | $next = new DateTime( date( 'Y-m-d', $current ) ); |
| 424 | $next->modify( 'first day of next year' ); |
| 425 | $recurring_event_date_start = $next->format( 'Y' ) . date( 'md\THis', strtotime( $event['DTSTART'] ) ); |
| 426 | } catch ( Exception $e ) { // phpcs:ignore Generic.CodeAnalysis.EmptyStatement.DetectedCatch |
| 427 | // Invalid argument to DateTime. |
| 428 | } |
| 429 | } |
| 430 | } |
| 431 | break; |
| 432 | |
| 433 | default: |
| 434 | $frequency = false; |
| 435 | } |
| 436 | |
| 437 | if ( false !== $frequency && ! $noop ) { |
| 438 | $count_counter = 1; |
| 439 | |
| 440 | // If no COUNT limit, go to 10. |
| 441 | if ( empty( $rrule_count ) ) { |
| 442 | $rrule_count = 10; |
| 443 | } |
| 444 | |
| 445 | // Set up EXDATE handling for the event. |
| 446 | $exdates = $event['EXDATE'] ?? array(); |
| 447 | |
| 448 | for ( $i = 1; $i <= $echo_limit; $i++ ) { |
| 449 | |
| 450 | // Weeks need a daily loop and must check for inclusion in BYDAYS. |
| 451 | if ( 'week' === $frequency ) { |
| 452 | $byday_event_date_start = strtotime( $recurring_event_date_start ); |
| 453 | |
| 454 | foreach ( $weekdays as $day ) { |
| 455 | |
| 456 | $event_start_timestamp = $byday_event_date_start; |
| 457 | $start_time = date( 'His', $event_start_timestamp ); |
| 458 | $event_end_timestamp = $event_start_timestamp + $duration; |
| 459 | $end_time = date( 'His', $event_end_timestamp ); |
| 460 | if ( 8 === strlen( $event['DTSTART'] ) ) { |
| 461 | $exdate_compare = date( 'Ymd', $event_start_timestamp ); |
| 462 | } else { |
| 463 | $exdate_compare = date( 'Ymd\THis', $event_start_timestamp ); |
| 464 | } |
| 465 | |
| 466 | if ( |
| 467 | in_array( $day, $bydays, true ) |
| 468 | && $event_end_timestamp > $current |
| 469 | && $event_start_timestamp < $until |
| 470 | && $count_counter <= $rrule_count |
| 471 | && $event_start_timestamp >= $date_from_ics |
| 472 | && ! in_array( $exdate_compare, $exdates, true ) |
| 473 | ) { |
| 474 | if ( 8 === strlen( $event['DTSTART'] ) ) { |
| 475 | $event['DTSTART'] = date( 'Ymd', $event_start_timestamp ); |
| 476 | $event['DTEND'] = date( 'Ymd', $event_end_timestamp ); |
| 477 | } else { |
| 478 | $event['DTSTART'] = date( 'Ymd\THis', $event_start_timestamp ); |
| 479 | $event['DTEND'] = date( 'Ymd\THis', $event_end_timestamp ); |
| 480 | } |
| 481 | if ( $this->timezone->getName() && 8 !== strlen( $event['DTSTART'] ) ) { |
| 482 | try { |
| 483 | $adjusted_time = new DateTime( $event['DTSTART'], new DateTimeZone( $this->timezone->getName() ) ); |
| 484 | $adjusted_time->setTimeZone( new DateTimeZone( 'UTC' ) ); |
| 485 | $event['DTSTART'] = $adjusted_time->format( 'Ymd\THis' ); |
| 486 | |
| 487 | $event['DTEND'] = date( 'Ymd\THis', strtotime( $event['DTSTART'] ) + $duration ); |
| 488 | } catch ( Exception $e ) { // phpcs:ignore Generic.CodeAnalysis.EmptyStatement.DetectedCatch |
| 489 | // Invalid argument to DateTime. |
| 490 | } |
| 491 | } |
| 492 | $upcoming[] = $event; |
| 493 | ++$count_counter; |
| 494 | } |
| 495 | |
| 496 | // Move forward one day. |
| 497 | $byday_event_date_start = strtotime( date( 'Ymd\T', strtotime( '+ 1 day', $event_start_timestamp ) ) . $start_time ); |
| 498 | } |
| 499 | |
| 500 | // Restore first event timestamp. |
| 501 | $event_start_timestamp = strtotime( $recurring_event_date_start ); |
| 502 | |
| 503 | } else { |
| 504 | |
| 505 | $event_start_timestamp = strtotime( $recurring_event_date_start ); |
| 506 | $start_time = date( 'His', $event_start_timestamp ); |
| 507 | $event_end_timestamp = $event_start_timestamp + $duration; |
| 508 | $end_time = date( 'His', $event_end_timestamp ); |
| 509 | if ( 8 === strlen( $event['DTSTART'] ) ) { |
| 510 | $exdate_compare = date( 'Ymd', $event_start_timestamp ); |
| 511 | } else { |
| 512 | $exdate_compare = date( 'Ymd\THis', $event_start_timestamp ); |
| 513 | } |
| 514 | |
| 515 | if ( |
| 516 | $event_end_timestamp > $current |
| 517 | && $event_start_timestamp < $until |
| 518 | && $count_counter <= $rrule_count |
| 519 | && $event_start_timestamp >= $date_from_ics |
| 520 | && ! in_array( $exdate_compare, $exdates, true ) |
| 521 | ) { |
| 522 | if ( 8 === strlen( $event['DTSTART'] ) ) { |
| 523 | $event['DTSTART'] = date( 'Ymd', $event_start_timestamp ); |
| 524 | $event['DTEND'] = date( 'Ymd', $event_end_timestamp ); |
| 525 | } else { |
| 526 | $event['DTSTART'] = date( 'Ymd\T', $event_start_timestamp ) . $start_time; |
| 527 | $event['DTEND'] = date( 'Ymd\T', $event_end_timestamp ) . $end_time; |
| 528 | } |
| 529 | if ( $this->timezone->getName() && 8 !== strlen( $event['DTSTART'] ) ) { |
| 530 | try { |
| 531 | $adjusted_time = new DateTime( $event['DTSTART'], new DateTimeZone( $this->timezone->getName() ) ); |
| 532 | $adjusted_time->setTimeZone( new DateTimeZone( 'UTC' ) ); |
| 533 | $event['DTSTART'] = $adjusted_time->format( 'Ymd\THis' ); |
| 534 | |
| 535 | $event['DTEND'] = date( 'Ymd\THis', strtotime( $event['DTSTART'] ) + $duration ); |
| 536 | } catch ( Exception $e ) { // phpcs:ignore Generic.CodeAnalysis.EmptyStatement.DetectedCatch |
| 537 | // Invalid argument to DateTime. |
| 538 | } |
| 539 | } |
| 540 | $upcoming[] = $event; |
| 541 | ++$count_counter; |
| 542 | } |
| 543 | } |
| 544 | |
| 545 | // Set up next interval and reset $event['DTSTART'] and $event['DTEND'], keeping timestamps intact. |
| 546 | $next_start_timestamp = strtotime( "+ {$interval} {$frequency}s", $event_start_timestamp ); |
| 547 | if ( 8 === strlen( $event['DTSTART'] ) ) { |
| 548 | $event['DTSTART'] = date( 'Ymd', $next_start_timestamp ); |
| 549 | $event['DTEND'] = date( 'Ymd', strtotime( $event['DTSTART'] ) + $duration ); |
| 550 | } else { |
| 551 | $event['DTSTART'] = date( 'Ymd\THis', $next_start_timestamp ); |
| 552 | $event['DTEND'] = date( 'Ymd\THis', strtotime( $event['DTSTART'] ) + $duration ); |
| 553 | } |
| 554 | |
| 555 | // Move recurring event date forward. |
| 556 | $recurring_event_date_start = $event['DTSTART']; |
| 557 | } |
| 558 | $set_recurring_events[] = $uid; |
| 559 | |
| 560 | } |
| 561 | } elseif ( strtotime( $event['DTEND'] ?? $event['DTSTART'] ) >= $current ) { // Process normal events. |
| 562 | $upcoming[] = $event; |
| 563 | } |
| 564 | } |
| 565 | return $upcoming; |
| 566 | } |
| 567 | |
| 568 | /** |
| 569 | * Parse events from an iCalendar feed |
| 570 | * |
| 571 | * @param string $url (default: ''). |
| 572 | * @return array | false on failure |
| 573 | */ |
| 574 | public function parse( $url = '' ) { |
| 575 | $cache_group = 'icalendar_reader_parse'; |
| 576 | $disable_get_key = 'disable:' . md5( $url ); |
| 577 | |
| 578 | // Check to see if previous attempts have failed. |
| 579 | if ( false !== wp_cache_get( $disable_get_key, $cache_group ) ) { |
| 580 | return false; |
| 581 | } |
| 582 | |
| 583 | // rewrite webcal: URI scheme to HTTP. |
| 584 | $url = preg_replace( '/^webcal/', 'http', $url ); |
| 585 | // try to fetch. |
| 586 | $r = wp_safe_remote_get( |
| 587 | $url, |
| 588 | array( |
| 589 | 'timeout' => 3, |
| 590 | 'sslverify' => false, |
| 591 | ) |
| 592 | ); |
| 593 | if ( 200 !== wp_remote_retrieve_response_code( $r ) ) { |
| 594 | // We were unable to fetch any content, so don't try again for another 60 seconds. |
| 595 | wp_cache_set( $disable_get_key, 1, $cache_group, 60 ); |
| 596 | return false; |
| 597 | } |
| 598 | |
| 599 | $body = wp_remote_retrieve_body( $r ); |
| 600 | if ( empty( $body ) ) { |
| 601 | return false; |
| 602 | } |
| 603 | |
| 604 | $body = str_replace( "\r\n", "\n", $body ); |
| 605 | $lines = preg_split( "/\n(?=[A-Z])/", $body ); |
| 606 | |
| 607 | if ( empty( $lines ) ) { |
| 608 | return false; |
| 609 | } |
| 610 | |
| 611 | if ( false === stristr( $lines[0], 'BEGIN:VCALENDAR' ) ) { |
| 612 | return false; |
| 613 | } |
| 614 | |
| 615 | $type = ''; |
| 616 | foreach ( $lines as $line ) { |
| 617 | $add = $this->key_value_from_string( $line ); |
| 618 | if ( ! $add ) { |
| 619 | $this->add_component( $type, false, $line ); |
| 620 | continue; |
| 621 | } |
| 622 | list( $keyword, $value ) = $add; |
| 623 | |
| 624 | switch ( $keyword ) { |
| 625 | case 'BEGIN': |
| 626 | case 'END': |
| 627 | switch ( $line ) { |
| 628 | case 'BEGIN:VTODO': |
| 629 | ++$this->todo_count; |
| 630 | $type = 'VTODO'; |
| 631 | break; |
| 632 | case 'BEGIN:VEVENT': |
| 633 | ++$this->event_count; |
| 634 | $type = 'VEVENT'; |
| 635 | break; |
| 636 | case 'BEGIN:VCALENDAR': |
| 637 | case 'BEGIN:DAYLIGHT': |
| 638 | case 'BEGIN:VTIMEZONE': |
| 639 | case 'BEGIN:STANDARD': |
| 640 | $type = $value; |
| 641 | break; |
| 642 | case 'END:VTODO': |
| 643 | case 'END:VEVENT': |
| 644 | case 'END:VCALENDAR': |
| 645 | case 'END:DAYLIGHT': |
| 646 | case 'END:VTIMEZONE': |
| 647 | case 'END:STANDARD': |
| 648 | $type = 'VCALENDAR'; |
| 649 | break; |
| 650 | } |
| 651 | break; |
| 652 | case 'TZID': |
| 653 | if ( |
| 654 | 'VTIMEZONE' === $type |
| 655 | && ! $this->timezone |
| 656 | ) { |
| 657 | $this->timezone = $this->timezone_from_string( $value ); |
| 658 | } |
| 659 | break; |
| 660 | case 'X-WR-TIMEZONE': |
| 661 | if ( ! $this->timezone ) { |
| 662 | $this->timezone = $this->timezone_from_string( $value ); |
| 663 | } |
| 664 | break; |
| 665 | default: |
| 666 | $this->add_component( $type, $keyword, $value ); |
| 667 | break; |
| 668 | } |
| 669 | } |
| 670 | |
| 671 | // Filter for RECURRENCE-IDs. |
| 672 | $recurrences = array(); |
| 673 | if ( array_key_exists( 'VEVENT', $this->cal ) ) { |
| 674 | foreach ( $this->cal['VEVENT'] as $event ) { |
| 675 | if ( isset( $event['RECURRENCE-ID'] ) ) { |
| 676 | $recurrences[] = $event; |
| 677 | } |
| 678 | } |
| 679 | foreach ( $recurrences as $recurrence ) { |
| 680 | $count_vevent = count( $this->cal['VEVENT'] ); |
| 681 | for ( $i = 0; $i < $count_vevent; $i++ ) { |
| 682 | if ( |
| 683 | $this->cal['VEVENT'][ $i ]['UID'] === $recurrence['UID'] |
| 684 | && ! isset( $this->cal['VEVENT'][ $i ]['RECURRENCE-ID'] ) |
| 685 | ) { |
| 686 | $this->cal['VEVENT'][ $i ]['EXDATE'][] = $recurrence['RECURRENCE-ID']; |
| 687 | break; |
| 688 | } |
| 689 | } |
| 690 | } |
| 691 | } |
| 692 | |
| 693 | return $this->cal; |
| 694 | } |
| 695 | |
| 696 | /** |
| 697 | * Parse key:value from a string |
| 698 | * |
| 699 | * @param string $text (default: ''). |
| 700 | * @return array |
| 701 | */ |
| 702 | public function key_value_from_string( $text = '' ) { |
| 703 | preg_match( '/([^:]+)(;[^:]+)?[:]([\w\W]*)/', $text, $matches ); |
| 704 | |
| 705 | if ( 0 === count( $matches ) ) { |
| 706 | return false; |
| 707 | } |
| 708 | |
| 709 | return array( $matches[1], $matches[3] ); |
| 710 | } |
| 711 | |
| 712 | /** |
| 713 | * Convert a timezone name into a timezone object. |
| 714 | * |
| 715 | * @param string $text Timezone name. Example: America/Chicago. |
| 716 | * @return object|null A DateTimeZone object if the conversion was successful. |
| 717 | */ |
| 718 | private function timezone_from_string( $text ) { |
| 719 | try { |
| 720 | $timezone = new DateTimeZone( $text ); |
| 721 | } catch ( Exception $e ) { |
| 722 | $blog_timezone = get_option( 'timezone_string' ); |
| 723 | if ( ! $blog_timezone ) { |
| 724 | $blog_timezone = 'Etc/UTC'; |
| 725 | } |
| 726 | |
| 727 | $timezone = new DateTimeZone( $blog_timezone ); |
| 728 | } |
| 729 | |
| 730 | return $timezone; |
| 731 | } |
| 732 | |
| 733 | /** |
| 734 | * Add a component to the calendar array |
| 735 | * |
| 736 | * @param string $component (default: ''). |
| 737 | * @param bool|string $keyword (default: ''). |
| 738 | * @param string $value (default: ''). |
| 739 | * @return void |
| 740 | */ |
| 741 | public function add_component( $component = '', $keyword = '', $value = '' ) { |
| 742 | if ( ! $keyword ) { |
| 743 | $keyword = $this->last_keyword; |
| 744 | switch ( $component ) { |
| 745 | case 'VEVENT': |
| 746 | $value = $this->cal[ $component ][ $this->event_count - 1 ][ $keyword ] . $value; |
| 747 | break; |
| 748 | case 'VTODO': |
| 749 | $value = $this->cal[ $component ][ $this->todo_count - 1 ][ $keyword ] . $value; |
| 750 | break; |
| 751 | } |
| 752 | } |
| 753 | |
| 754 | /* |
| 755 | * Some events have a specific timezone set in their start/end date, |
| 756 | * and it may or may not be different than the calendar timzeone. |
| 757 | * Valid formats include: |
| 758 | * DTSTART;TZID=Pacific Standard Time:20141219T180000 |
| 759 | * DTEND;TZID=Pacific Standard Time:20141219T200000 |
| 760 | * EXDATE:19960402T010000Z,19960403T010000Z,19960404T010000Z |
| 761 | * EXDATE;VALUE=DATE:2015050 |
| 762 | * EXDATE;TZID=America/New_York:20150424T170000 |
| 763 | * EXDATE;TZID=Pacific Standard Time:20120615T140000,20120629T140000,20120706T140000 |
| 764 | */ |
| 765 | |
| 766 | // Always store EXDATE as an array. |
| 767 | if ( stristr( $keyword, 'EXDATE' ) ) { |
| 768 | $value = explode( ',', $value ); |
| 769 | } |
| 770 | |
| 771 | // Adjust DTSTART, DTEND, and EXDATE according to their TZID if set. |
| 772 | if ( strpos( $keyword, ';' ) && ( stristr( $keyword, 'DTSTART' ) || stristr( $keyword, 'DTEND' ) || stristr( $keyword, 'EXDATE' ) || stristr( $keyword, 'RECURRENCE-ID' ) ) ) { |
| 773 | $keyword = explode( ';', $keyword ); |
| 774 | |
| 775 | $tzid = false; |
| 776 | if ( 2 === count( $keyword ) ) { |
| 777 | $tparam = $keyword[1]; |
| 778 | |
| 779 | if ( str_contains( $tparam, 'TZID' ) ) { |
| 780 | $tzid = $this->timezone_from_string( str_replace( 'TZID=', '', $tparam ) ); |
| 781 | } |
| 782 | } |
| 783 | |
| 784 | // Normalize all times to default UTC. |
| 785 | if ( $tzid ) { |
| 786 | $adjusted_times = array(); |
| 787 | foreach ( (array) $value as $v ) { |
| 788 | try { |
| 789 | $adjusted_time = new DateTime( $v, $tzid ); |
| 790 | $adjusted_time->setTimeZone( new DateTimeZone( 'UTC' ) ); |
| 791 | $adjusted_times[] = $adjusted_time->format( 'Ymd\THis' ); |
| 792 | } catch ( Exception $e ) { |
| 793 | // Invalid argument to DateTime. |
| 794 | return; |
| 795 | } |
| 796 | } |
| 797 | $value = $adjusted_times; |
| 798 | } |
| 799 | |
| 800 | // Format for adding to event. |
| 801 | $keyword = $keyword[0]; |
| 802 | if ( 'EXDATE' !== $keyword ) { |
| 803 | $value = implode( (array) $value ); |
| 804 | } |
| 805 | } |
| 806 | |
| 807 | foreach ( (array) $value as $v ) { |
| 808 | switch ( $component ) { |
| 809 | case 'VTODO': |
| 810 | if ( 'EXDATE' === $keyword ) { |
| 811 | $this->cal[ $component ][ $this->todo_count - 1 ][ $keyword ][] = $v; |
| 812 | } else { |
| 813 | $this->cal[ $component ][ $this->todo_count - 1 ][ $keyword ] = $v; |
| 814 | } |
| 815 | break; |
| 816 | case 'VEVENT': |
| 817 | if ( 'EXDATE' === $keyword ) { |
| 818 | $this->cal[ $component ][ $this->event_count - 1 ][ $keyword ][] = $v; |
| 819 | } else { |
| 820 | $this->cal[ $component ][ $this->event_count - 1 ][ $keyword ] = $v; |
| 821 | } |
| 822 | break; |
| 823 | default: |
| 824 | $this->cal[ $component ][ $keyword ] = $v; |
| 825 | break; |
| 826 | } |
| 827 | } |
| 828 | $this->last_keyword = $keyword; |
| 829 | } |
| 830 | |
| 831 | /** |
| 832 | * Escape strings with wp_kses, allow links |
| 833 | * |
| 834 | * @param string $string (default: '') The string to escape. |
| 835 | * @return string |
| 836 | */ |
| 837 | public function escape( $string = '' ) { |
| 838 | // Unfold content lines per RFC 5545. |
| 839 | $string = str_replace( "\n\t", '', $string ); |
| 840 | $string = str_replace( "\n ", '', $string ); |
| 841 | |
| 842 | $allowed_html = array( |
| 843 | 'a' => array( |
| 844 | 'href' => array(), |
| 845 | 'title' => array(), |
| 846 | ), |
| 847 | ); |
| 848 | |
| 849 | $allowed_tags = ''; |
| 850 | foreach ( array_keys( $allowed_html ) as $tag ) { |
| 851 | $allowed_tags .= "<{$tag}>"; |
| 852 | } |
| 853 | |
| 854 | // Running strip_tags() first with allowed tags to get rid of remaining gallery markup, etc |
| 855 | // because wp_kses() would only htmlentity'fy that. Then still running wp_kses(), for extra |
| 856 | // safety and good measure. |
| 857 | return wp_kses( strip_tags( $string, $allowed_tags ), $allowed_html ); |
| 858 | } |
| 859 | |
| 860 | /** |
| 861 | * Render the events |
| 862 | * |
| 863 | * @param string $url (default: '') URL of the iCal feed. |
| 864 | * @param array $args Event options. |
| 865 | * |
| 866 | * @return mixed bool|string false on failure, rendered HTML string on success. |
| 867 | */ |
| 868 | public function render( $url = '', $args = array() ) { |
| 869 | |
| 870 | $args = wp_parse_args( |
| 871 | $args, |
| 872 | array( |
| 873 | 'context' => 'widget', |
| 874 | 'number' => 5, |
| 875 | ) |
| 876 | ); |
| 877 | |
| 878 | $events = $this->get_events( $url, $args['number'] ); |
| 879 | $events = $this->apply_timezone_offset( $events ); |
| 880 | |
| 881 | if ( empty( $events ) ) { |
| 882 | return false; |
| 883 | } |
| 884 | |
| 885 | ob_start(); |
| 886 | |
| 887 | if ( 'widget' === $args['context'] ) : ?> |
| 888 | <ul class="upcoming-events"> |
| 889 | <?php foreach ( $events as $event ) : ?> |
| 890 | <li> |
| 891 | <strong class="event-summary"> |
| 892 | <?php |
| 893 | echo $this->escape( stripslashes( $event['SUMMARY'] ) ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- this method is built to escape. |
| 894 | ?> |
| 895 | </strong> |
| 896 | <span class="event-when"><?php echo esc_html( $this->formatted_date( $event ) ); ?></span> |
| 897 | <?php if ( ! empty( $event['LOCATION'] ) ) : ?> |
| 898 | <span class="event-location"> |
| 899 | <?php |
| 900 | echo $this->escape( stripslashes( $event['LOCATION'] ) ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- this method is built to escape. |
| 901 | ?> |
| 902 | </span> |
| 903 | <?php endif; ?> |
| 904 | <?php if ( ! empty( $event['DESCRIPTION'] ) ) : ?> |
| 905 | <span class="event-description"> |
| 906 | <?php |
| 907 | echo wp_trim_words( $this->escape( stripcslashes( $event['DESCRIPTION'] ) ) ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- this method is built to escape. |
| 908 | ?> |
| 909 | </span> |
| 910 | <?php endif; ?> |
| 911 | </li> |
| 912 | <?php endforeach; ?> |
| 913 | </ul> |
| 914 | <?php |
| 915 | endif; |
| 916 | |
| 917 | if ( 'shortcode' === $args['context'] ) : |
| 918 | ?> |
| 919 | <table class="upcoming-events"> |
| 920 | <thead> |
| 921 | <tr> |
| 922 | <th><?php esc_html_e( 'Location', 'jetpack' ); ?></th> |
| 923 | <th><?php esc_html_e( 'When', 'jetpack' ); ?></th> |
| 924 | <th><?php esc_html_e( 'Summary', 'jetpack' ); ?></th> |
| 925 | <th><?php esc_html_e( 'Description', 'jetpack' ); ?></th> |
| 926 | </tr> |
| 927 | </thead> |
| 928 | <tbody> |
| 929 | <?php foreach ( $events as $event ) : ?> |
| 930 | <tr> |
| 931 | <td> |
| 932 | <?php |
| 933 | echo empty( $event['LOCATION'] ) |
| 934 | ? ' ' |
| 935 | : $this->escape( stripslashes( $event['LOCATION'] ) ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- this method is built to escape. |
| 936 | ?> |
| 937 | </td> |
| 938 | <td><?php echo esc_html( $this->formatted_date( $event ) ); ?></td> |
| 939 | <td> |
| 940 | <?php |
| 941 | echo empty( $event['SUMMARY'] ) |
| 942 | ? ' ' |
| 943 | : $this->escape( stripslashes( $event['SUMMARY'] ) ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- this method is built to escape. |
| 944 | ?> |
| 945 | </td> |
| 946 | <td> |
| 947 | <?php |
| 948 | echo empty( $event['DESCRIPTION'] ) |
| 949 | ? ' ' |
| 950 | : wp_trim_words( $this->escape( stripcslashes( $event['DESCRIPTION'] ) ) ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped -- this method is built to escape. |
| 951 | ?> |
| 952 | </td> |
| 953 | </tr> |
| 954 | <?php endforeach; ?> |
| 955 | </tbody> |
| 956 | </table> |
| 957 | <?php |
| 958 | endif; |
| 959 | |
| 960 | $rendered = ob_get_clean(); |
| 961 | |
| 962 | if ( empty( $rendered ) ) { |
| 963 | return false; |
| 964 | } |
| 965 | |
| 966 | return $rendered; |
| 967 | } |
| 968 | |
| 969 | /** |
| 970 | * Return a localized string with information about the event's date and time, |
| 971 | * or starting date and end date. |
| 972 | * |
| 973 | * @param array $event Info about the event. |
| 974 | * |
| 975 | * @return string |
| 976 | */ |
| 977 | public function formatted_date( $event ) { |
| 978 | $date_format = get_option( 'date_format' ); |
| 979 | $time_format = get_option( 'time_format' ); |
| 980 | $start = strtotime( $event['DTSTART'] ); |
| 981 | $end = isset( $event['DTEND'] ) ? strtotime( $event['DTEND'] ) : false; |
| 982 | |
| 983 | $all_day = ( 8 === strlen( $event['DTSTART'] ) ); |
| 984 | |
| 985 | if ( ! $all_day && $this->timezone ) { |
| 986 | try { |
| 987 | $timezone_offset = $this->timezone->getOffset( new DateTime( $event['DTSTART'] ) ); |
| 988 | $start += $timezone_offset; |
| 989 | |
| 990 | if ( $end ) { |
| 991 | $end += $timezone_offset; |
| 992 | } |
| 993 | } catch ( Exception $e ) { |
| 994 | // Invalid argument to DateTime. |
| 995 | return ''; |
| 996 | } |
| 997 | } |
| 998 | $single_day = $end ? ( $end - $start ) <= DAY_IN_SECONDS : true; |
| 999 | |
| 1000 | /* translators: Date and time */ |
| 1001 | $date_with_time = __( '%1$s at %2$s', 'jetpack' ); |
| 1002 | /* translators: Two dates with a separator */ |
| 1003 | $two_dates = __( '%1$s – %2$s', 'jetpack' ); |
| 1004 | |
| 1005 | // we'll always have the start date. Maybe with time. |
| 1006 | if ( $all_day ) { |
| 1007 | $date = date_i18n( $date_format, $start ); |
| 1008 | } else { |
| 1009 | $date = sprintf( |
| 1010 | $date_with_time, |
| 1011 | date_i18n( $date_format, $start ), |
| 1012 | date_i18n( $time_format, $start ) |
| 1013 | ); |
| 1014 | } |
| 1015 | |
| 1016 | // single day, timed. |
| 1017 | if ( $single_day && ! $all_day && false !== $end ) { |
| 1018 | $date = sprintf( $two_dates, $date, date_i18n( $time_format, $end ) ); |
| 1019 | } |
| 1020 | |
| 1021 | // multi-day. |
| 1022 | if ( ! $single_day ) { |
| 1023 | |
| 1024 | if ( $all_day ) { |
| 1025 | // DTEND for multi-day events represents "until", not "including", so subtract one minute. |
| 1026 | $end_date = date_i18n( $date_format, $end - 60 ); |
| 1027 | } else { |
| 1028 | $end_date = sprintf( $date_with_time, date_i18n( $date_format, $end ), date_i18n( $time_format, $end ) ); |
| 1029 | } |
| 1030 | |
| 1031 | $date = sprintf( $two_dates, $date, $end_date ); |
| 1032 | |
| 1033 | } |
| 1034 | |
| 1035 | return $date; |
| 1036 | } |
| 1037 | |
| 1038 | /** |
| 1039 | * Sort list of events by event date. |
| 1040 | * |
| 1041 | * @param array $list List of events. |
| 1042 | * |
| 1043 | * @return array |
| 1044 | */ |
| 1045 | protected function sort_by_recent( $list ) { |
| 1046 | $dates = array(); |
| 1047 | $sorted_list = array(); |
| 1048 | |
| 1049 | foreach ( $list as $key => $row ) { |
| 1050 | $date = $row['DTSTART']; |
| 1051 | // pad some time onto an all day date. |
| 1052 | if ( 8 === strlen( $date ) ) { |
| 1053 | $date .= 'T000000Z'; |
| 1054 | } |
| 1055 | $dates[ $key ] = $date; |
| 1056 | } |
| 1057 | asort( $dates ); |
| 1058 | foreach ( $dates as $key => $value ) { |
| 1059 | $sorted_list[ $key ] = $list[ $key ]; |
| 1060 | } |
| 1061 | unset( $list ); |
| 1062 | return $sorted_list; |
| 1063 | } |
| 1064 | |
| 1065 | // phpcs:enable WordPress.DateTime.RestrictedFunctions.date_date |
| 1066 | } |
| 1067 | |
| 1068 | /** |
| 1069 | * Wrapper function for iCalendarReader->get_events() |
| 1070 | * |
| 1071 | * @param string $url (default: ''). |
| 1072 | * @param int $count Number of events to fetch. |
| 1073 | * @return array |
| 1074 | */ |
| 1075 | function icalendar_get_events( $url = '', $count = 5 ) { |
| 1076 | /* |
| 1077 | * Find your calendar's address |
| 1078 | * https://support.google.com/calendar/bin/answer.py?hl=en&answer=37103 |
| 1079 | */ |
| 1080 | return ( new iCalendarReader() )->get_events( $url, $count ); |
| 1081 | } |
| 1082 | |
| 1083 | /** |
| 1084 | * Wrapper function for iCalendarReader->render() |
| 1085 | * |
| 1086 | * @param string $url (default: ''). |
| 1087 | * @param array $args Options when rendering events. |
| 1088 | * |
| 1089 | * @return mixed bool|string false on failure, rendered HTML string on success. |
| 1090 | */ |
| 1091 | function icalendar_render_events( $url = '', $args = array() ) { |
| 1092 | return ( new iCalendarReader() )->render( $url, $args ); |
| 1093 | } |
| 1094 |