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<?php
use Tribe__Date_Utils as Dates;
use Tribe__Utils__Array as Arr;
/**
* Class that implements the export to iCal functionality
* both for views and single events.
*/
class Tribe__Events__iCal {
/**
* The number of events that will be exported when generating the iCal feed.
*
* @since 4.4.0
*
* @var int
*/
protected $feed_default_export_count = 30;
/**
* The $post where the *.ics file is generated.
*
* @since 4.9.4
*
* @var null
*/
protected $post = null;
/**
* An array with all the events that are part of the *.ics file.
*
* @since 4.9.4
*
* @var array
*/
protected $events = [];
/**
* The type of iCal Feed (ical|outlook).
*
* @since 5.16.0
*
* @var string
*/
protected $type = 'ical';
/**
* Set all the filters and actions necessary for the operation of the iCal generator.
*
* @since 3.6.0
*/
public function hook() {
add_action( 'tribe_events_after_footer', [ $this, 'maybe_add_link' ], 10, 1 );
add_action( 'tribe_events_single_event_after_the_content', [ $this, 'single_event_links' ] );
add_action( 'template_redirect', [ $this, 'do_ical_template' ] );
add_filter( 'tribe_get_ical_link', [ $this, 'day_view_ical_link' ], 20, 1 );
add_action( 'wp_head', [ $this, 'set_feed_link' ], 2, 0 );
}
/**
* Outputs a <link> element for the iCal feed.
*
* @since 3.6.0
*/
public function set_feed_link() {
if ( ! current_theme_supports( 'automatic-feed-links' ) ) {
return;
}
$separator = _x( '»', 'feed link', 'the-events-calendar' );
$feed_title = sprintf( esc_html__( '%1$s %2$s iCal Feed', 'the-events-calendar' ), get_bloginfo( 'name' ), $separator );
printf(
'<link rel="alternate" type="text/calendar" title="%s" href="%s" />',
esc_attr( $feed_title ),
esc_url( tribe_get_ical_link() )
);
echo "\n";
}
/**
* Returns the URL for the iCal generator for lists of posts.
*
* @since 3.6.0
*
* @param string $type The type of iCal link to return, defaults to 'home'.
*
* @return string
*/
public function get_ical_link( $type = 'home' ) {
$tec = Tribe__Events__Main::instance();
return add_query_arg( [ 'ical' => 1 ], $tec->getLink( $type ) );
}
/**
* Make sure when we grab a month link it includes the correct month.
*
* @since 5.1.0
*
* @param string $event_date Date of the month we are getting the link for.
*
* @return string The iCal export URL for the Month view.
*/
public function month_view_ical_link( $event_date = null ) {
$tec = Tribe__Events__Main::instance();
// Default to current month if not set.
if ( empty( $event_date ) ) {
$event_date = Dates::build_date_object()->format( Dates::DBYEARMONTHTIMEFORMAT );
}
$url = $tec->getLink( 'month', $event_date );
return add_query_arg( [ 'ical' => 1 ], $url );
}
/**
* Make sure iCal link has the date in the URL instead of "today" on day view.
*
* @since 3.6.0
*
* @param string $link The URL of the iCal feed for day view.
*
* @return string
*/
public function day_view_ical_link( $link ) {
if ( tribe_is_day() ) {
if ( ! $wp_query = tribe_get_global_query_object() ) {
return;
}
$day = $wp_query->get( 'start_date' );
$link = trailingslashit( esc_url( trailingslashit( tribe_get_day_link( $day ) ) . '?ical=1' ) );
}
return $link;
}
/**
* Generates the markup for iCal and gCal single event links.
*
* @since 3.6.0
*/
public function single_event_links() {
// Don't show on password protected posts.
if ( is_single() && post_password_required() ) {
return;
}
$calendar_links = '<div class="tribe-events-cal-links">';
$calendar_links .= '<a class="tribe-events-gcal tribe-events-button" href="' . Tribe__Events__Main::instance()->esc_gcal_url( tribe_get_gcal_link() ) . '" target="_blank" rel="noopener noreferrer noindex" title="' . esc_attr__( 'Add to Google Calendar', 'the-events-calendar' ) . '">+ ' . esc_html__( 'Google Calendar', 'the-events-calendar' ) . '</a>';
$calendar_links .= '<a class="tribe-events-ical tribe-events-button" href="' . esc_url( tribe_get_single_ical_link() ) . '" title="' . esc_attr__( 'Download .ics file', 'the-events-calendar' ) . '" rel="noopener noreferrer noindex" >+ ' . esc_html__( 'Add to iCalendar', 'the-events-calendar' ) . '</a>';
$calendar_links .= '</div><!-- .tribe-events-cal-links -->';
/**
* Filters the HTML for the iCal and gCal single-event link buttons.
*
* This allows for complete customization of the calendar links output.
*
* @since 4.6.2
*
* @param string $calendar_links The HTML markup of the iCal and gCal single-event link buttons.
*/
echo apply_filters( 'tribe_events_ical_single_event_links', $calendar_links );
}
/**
* Generates the markup for the "iCal Import" link for the views.
*
* @since 3.6.0
*/
public function maybe_add_link() {
if ( ! $wp_query = tribe_get_global_query_object() ) {
return;
}
/**
* A filter to control whether the "iCal Import" link shows up or not.
*
* @since 4.6.2
*
* @param boolean $show Whether to show the "iCal Import" link; defaults to true.
*/
$show_ical = apply_filters( 'tribe_events_list_show_ical_link', true );
if ( ! $show_ical ) {
return;
}
if ( tribe_is_month() && ! tribe_events_month_has_events() ) {
return;
}
if ( ! tribe_is_month() && ( is_single() || empty( $wp_query->posts ) ) ) {
return;
}
$tec = Tribe__Events__Main::instance();
$view = $tec->displaying;
if ( defined( 'DOING_AJAX' ) && DOING_AJAX && isset( $wp_query->query_vars['eventDisplay'] ) ) {
$view = $wp_query->query_vars['eventDisplay'];
}
/**
* Allow the customization of the iCal export link "Export Events" text.
*
* @since 4.6.2
*
* @param string $text The default link text, which is "Export Events".
*/
$text = apply_filters( 'tribe_events_ical_export_text', esc_html__( 'Export Events', 'the-events-calendar' ) );
$title = esc_html__( 'Use this to share calendar data with Google Calendar, Apple iCal and other compatible apps', 'the-events-calendar' );
printf(
'<a class="tribe-events-ical tribe-events-button" rel="noindex nofollow" title="%1$s" href="%2$s">+ %3$s</a>',
$title,
esc_url( tribe_get_ical_link() ),
$text
);
}
/**
* Executes the iCal generator when the appropriate query_var or $_GET is set up.
*
* @since 3.6.0
*/
public function do_ical_template() {
// Bail if a relevant query string is not included.
// Otherwise, hijack to the iCal template.
if (
! get_query_var( 'ical' )
&& ! isset( $_GET['ical'] )
&& ! get_query_var( 'outlook-ical' )
&& ! isset( $_GET['outlook-ical'] )
) {
return;
}
// Change the type, if it's an Outlook export.
if (
get_query_var( 'outlook-ical' )
|| isset( $_GET['outlook-ical'] )
) {
$this->type = 'outlook';
}
/**
* Action fired before the creation of the feed is started, helpful to set up methods and other filters used
* on this class.
*
* @since 4.6.11
*/
do_action( 'tribe_events_ical_before' );
if ( ! $wp_query = tribe_get_global_query_object() ) {
return;
}
$event_ids = tribe_get_request_var( 'event_ids', false );
/**
* Allows filtering the event IDs after the `Tribe__Events__ICal` class
* tried to fetch them from the current request.
*
* @since 4.6.0
*
* @param array<int>|false $event_ids Either a list of requested event post IDs or `false`
* if the current request does not specify the event post
* IDs to fetch.
*/
$event_ids = apply_filters( 'tribe_ical_template_event_ids', $event_ids );
if ( false !== $event_ids ) {
$event_ids = Arr::list_to_array( $event_ids );
// Exit if there are no events, or the feed will still generate.
if ( empty( $event_ids ) ) {
die();
}
$events = array_map( 'tribe_get_event', $event_ids );
$this->generate_ical_feed( $events );
} elseif ( is_singular( Tribe__Events__Main::POSTTYPE ) ) {
$this->generate_ical_feed( $wp_query->post );
} else {
$this->generate_ical_feed();
}
die();
}
/**
* Checks access to an event's content, in the context for generating an iCal file.
*
* @since 6.1.3
*
* @param numeric|WP_Post $post The post to evaluate our access to.
*
* @return bool True if a post should be shown, false if it should be hidden or password protected.
*/
public static function has_access_to_see_event_content( $post ): bool {
// Can we see it at all?
if ( ! self::has_access_to_see_event_exists( $post ) ) {
return false;
}
// If password required, we hide the content from the feed.
return ! post_password_required( $post );
}
/**
* Checks access to an event, in the context for generating an iCal file.
*
* @since 6.1.3
*
* @param numeric|WP_Post $post The post to evaluate our access to.
*
* @return bool True if the post can be accessed, false if not.
*/
public static function has_access_to_see_event_exists( $post ): bool {
$post = get_post( $post );
if ( ! $post instanceof WP_Post ) {
return false;
}
// Most events.
if ( $post->post_status === 'publish' ) {
return true;
}
// If private, make sure they have access (and are logged in).
if ( $post->post_status === 'private' && current_user_can( 'read_post', $post->ID ) ) {
return true;
}
// Fallback to denied access unless explicitly approved above.
return false;
}
/**
* Generates the iCal file.
*
* @since 6.1.3 Adding access checks to the provided posts.
*
* @param int|null|array $post If you want the iCal file for a single event.
* @param boolean $echo Whether the content should be echoed or returned.
*
* @return string The complete iCal feed.
*/
public function generate_ical_feed( $post = null, $echo = true ) {
// If we are searching via a single numeric/post, turn into an array.
if ( ! empty( $post ) && ! is_array( $post ) ) {
$post = [ $post ];
}
// Gatekeep any externally handed events through permissions.
if ( is_array( $post ) ) {
$post = array_filter( $post, static function ( $event_id ) {
return self::has_access_to_see_event_exists( get_post( $event_id ) );
} );
if ( empty( $post ) ) {
if ( $echo ) {
die();
} else {
return '';
}
}
$post = array_map( 'get_post', $post );
}
// Now set up to do our search.
$this->post = $post;
$this->events = $this->get_event_posts();
$content = $this->get_content();
if ( $echo ) {
$this->set_headers();
tribe_exit( $content );
}
return $content;
}
/**
* Get an array with all the Events to be used to process the *.ics file.
*
* @since 4.9.4
*
* @return array|null An array of events or null.
*/
protected function get_event_posts() {
if ( $this->post ) {
return is_array( $this->post ) ? $this->post : [ $this->post ];
}
if ( tribe_is_month() ) {
return $this->get_month_view_events();
}
$list_view_slug = \Tribe\Events\Views\V2\Views\List_View::get_view_slug();
if ( tribe_is_organizer() ) {
return $this->get_events_list(
[
'organizer' => get_the_ID(),
'eventDisplay' => $list_view_slug,
]
);
}
if ( tribe_is_venue() ) {
return $this->get_events_list(
[
'venue' => get_the_ID(),
'eventDisplay' => tribe_get_request_var( 'tribe_event_display', $list_view_slug ),
]
);
}
if ( ! $wp_query = tribe_get_global_query_object() ) {
return [];
}
$args = $wp_query->query_vars;
if ( $list_view_slug === $args['eventDisplay'] ) {
// When producing a List view iCal feed the `eventDate` is misleading, so we remove it.
unset( $args['eventDate'] );
// If passed a date, only observe it if it's in the future.
if ( isset( $args['tribe-bar-date'] ) ) {
$set_date = Dates::build_date_object( $args['tribe-bar-date'] );
if ( $set_date < Dates::build_date_object() ) {
unset( $args['tribe-bar-date'] );
}
}
}
return $this->get_events_list( $args, $wp_query );
}
/**
* Gets all events in the current month, matching those presented in month view
* by default (and therefore potentially including some events from the tail end
* of the previous month and start of the following month).
*
* We build a fresh 'custom'-type query here rather than taking advantage of the
* main query since page spoofing can render the actual query and results
* inaccessible (and it cannot be recovered via a query reset).
*
* @since 3.6.0
*
* @return array Events in the month.
*/
private function get_month_view_events() {
if ( ! $wp_query = tribe_get_global_query_object() ) {
return [];
}
$event_date = $wp_query->get( 'eventDate' );
$month = empty( $event_date )
? tribe_get_month_view_date()
: $wp_query->get( 'eventDate' );
$args = [
'eventDisplay' => 'custom',
'start_date' => \Tribe\Events\Views\V2\Views\Month_View::calculate_first_cell_date( $month ),
'end_date' => \Tribe\Events\Views\V2\Views\Month_View::calculate_final_cell_date( $month ),
'posts_per_page' => -1,
'hide_upcoming' => true,
];
// Verify the Initial Category.
if ( $wp_query->get( Tribe__Events__Main::TAXONOMY, false ) !== false ) {
$args[ Tribe__Events__Main::TAXONOMY ] = $wp_query->get( Tribe__Events__Main::TAXONOMY );
}
/**
* Provides an opportunity to modify the query args used to build a list of events
* to export from month view.
*
* This could be useful where its desirable to limit the exported data set to only
* those events taking place in the specific month being viewed (rather than an exact
* match of the events shown in month view itself, which may include events from
* adjacent months).
*
* @since 3.10.1
*
* @var array $args The query arguments.
* @var string $month The month the query is for in YYYY-MM-DD format for the first day of the month.
*/
$args = (array) apply_filters( 'tribe_ical_feed_month_view_query_args', $args, $month );
return tribe_get_events( $args );
}
/**
* Set the headers before the file is delivered.
*
* @since 4.9.4
*/
protected function set_headers() {
header( 'HTTP/1.0 200 OK', true, 200 );
header( 'Content-type: text/calendar; charset=UTF-8' );
header(
'Content-Disposition: attachment; filename="' . $this->get_file_name() . '"'
);
}
/**
* Get the file name of the *.ics file.
*
* @since 4.9.4
* @since 5.16.0 - Add the iCal type to the filename so both ics and outlook ics are unique names.
*
* @return mixed The calendar name.
*/
protected function get_file_name() {
$event_ids = wp_list_pluck( $this->events, 'ID' );
$site = sanitize_title( get_bloginfo( 'name' ) );
$hash = substr( md5( $this->type . implode( $event_ids ) ), 0, 11 );
$filename = sprintf( '%s-%s.ics', $site, $hash );
/**
* Allows filtering the filename provided in the Content-Disposition header for iCal feeds.
*
* @since 4.9.4
*
* @var string $filename
* @var WP_Post|null $post
*/
return apply_filters( 'tribe_events_ical_feed_filename', $filename, $this->post );
}
/**
* Get the full content of the *.ics file.
*
* @since 4.9.4
*
* @return string The full content of the *.ics file.
*/
protected function get_content() {
$parts = [
$this->get_start(),
$this->get_timezones( $this->events ),
$this->get_body( $this->events ),
$this->get_end()
];
return implode( '', $parts );
}
/**
* Get the start of the .ics file.
*
* @since 4.9.4
* @since 5.16.0 - Add a check for iCal type to prevent Outlook ics from including X-WR-CALNAME.
*
* @return string The beginning of the iCal feed containing calendar information.
*/
protected function get_start() {
$blog_home = get_bloginfo( 'url' );
$blog_name = get_bloginfo( 'name' );
$content = "BEGIN:VCALENDAR\r\n";
$content .= "VERSION:2.0\r\n";
$content .= 'PRODID:-//' . $blog_name . ' - ECPv' . Tribe__Events__Main::VERSION . "//NONSGML v1.0//EN\r\n";
$content .= "CALSCALE:GREGORIAN\r\n";
$content .= "METHOD:PUBLISH\r\n";
/**
* Allows for customizing the value of the generated iCal file's "X-WR-CALNAME:" property.
*
* @since 4.9.4
*
* @param string $blog_name The value to use for "X-WR-CALNAME"; defaults to value of get_bloginfo( 'name' ).
*/
$x_wr_calname = apply_filters( 'tribe_ical_feed_calname', $blog_name );
if ( ! empty( $x_wr_calname ) && 'ical' === $this->type ) {
$content .= 'X-WR-CALNAME:' . $x_wr_calname . "\r\n";
}
$content .= 'X-ORIGINAL-URL:' . $blog_home . "\r\n";
$content .= "X-WR-CALDESC:" . sprintf( esc_html_x( 'Events for %s', 'iCal feed description', 'the-events-calendar' ), $blog_name ) . "\r\n";
/**
* Allows for customization of the various properties at the top of the generated iCal file.
*
* @since 4.9.4
*
* @param string $content Existing properties atop the file; starts at "BEGIN:VCALENDAR", ends at "X-WR-CALDESC".
*/
return apply_filters( 'tribe_ical_properties', $content );
}
/**
* Add the VTIMEZONE groups to the file.
*
* @since 4.9.4
* @since 6.10.2 Make sure that each time zone definition has its own group.
*
* @param array $events An array with all the events.
*
* @return string The string containing all the time zone information needed in the iCal feed/file.
*/
protected function get_timezones( $events = [] ) {
$timezones = $this->parse_timezones( $events );
if ( empty( $timezones ) ) {
return '';
}
$item = [];
foreach ( $timezones as $row ) {
/** @var DateTimeZone $timezone */
$timezone = $row['timezone'];
$ordered = [
'start' => wp_list_pluck( $row['events'], 'start_year' ),
'end' => wp_list_pluck( $row['events'], 'end_year' ),
];
sort( $ordered['start'] );
rsort( $ordered['end'] );
$ordered['start'] = array_values( $ordered['start'] );
$ordered['end'] = array_values( $ordered['end'] );
$start = reset( $ordered['start'] );
$end = reset( $ordered['end'] );
if ( empty( $start ) || empty( $end ) ) {
continue;
}
$transitions = $timezone->getTransitions( $start, $end );
if ( is_array( $transitions ) && count( $transitions ) === 1 ) {
$transitions[] = array_values( $transitions )[ 0 ];
}
$item[] = 'BEGIN:VTIMEZONE';
$id = $timezone->getName();
$item[] = 'TZID:' . $id;
$last_transition = null;
foreach ( $transitions as $i => $transition ) {
if ( $i === 0 ) {
$last_transition = $transition;
continue;
}
$type = 'STANDARD';
if ( $transition['isdst'] ) {
$type = 'DAYLIGHT';
}
$item[] = 'BEGIN:' . $type;
$item[] = 'TZOFFSETFROM:' . $this->format_offset( $last_transition['offset'] );
$item[] = 'TZOFFSETTO:' . $this->format_offset( $transition['offset'] );
$item[] = 'TZNAME:' . $transition['abbr'];
try {
$start = new DateTime( $transition['time'], $timezone );
$item[] = 'DTSTART:' . $start->format( "Ymd\THis" );
} catch ( Exception $e ) {
// @todo [BTRIA-610]: report this exception
}
$item[] = 'END:' . $type;
$last_transition = $transition;
}
$item[] = 'END:VTIMEZONE';
}
/**
* Allows customization of the "VTIMEZONE" items rendered inside an iCal export file.
*
* @since 4.9.4
*
* @param array $item The various iCal file format components of the time zones.
* @param array $timezones The various iCal time zone components.
*/
$item = apply_filters( 'tribe_ical_feed_vtimezone', $item, $timezones );
return implode( "\r\n", $item ) . "\r\n";
}
/**
* Create an array of arrays with unique time zones for all the events, every time zone has
* the following fields:
*
* - timezone - The Timezone Object.
* - events - List with all the events.
*
* @since 4.9.4
*
* @param $events array An array with all the events to parse the timezones.
*
* @return array An array with all time zones as keys, and array of events in the respective time zones as values.
*/
protected function parse_timezones( $events ) {
$data = [];
foreach ( $events as $event ) {
if ( ! $event instanceof WP_Post ) {
continue;
}
$timezone = $this->get_timezone( $event );
if ( ! isset( $data[ $timezone ] ) ) {
$data[ $timezone ] = [
'timezone' => Tribe__Events__Timezones::build_timezone_object( $timezone ),
'events' => [],
];
}
$data[ $timezone ]['events'][] = [
'event' => $event,
'start_year' => strtotime( 'first day of january', tribe_get_start_date( $event, false, 'U' ) ),
'end_year' => strtotime( 'last day of december', tribe_get_end_date( $event, false, 'U' ) ),
];
}
return $data;
}
/**
* Format the offset into hours and minutes from seconds.
*
* @since 4.9.4
*
* @param int $offset Offset to UTC in seconds.
*
* @return string The offset to UTC in hours and minutes in ±HHMM format.
*/
protected function format_offset( $offset ) {
$hours = intval( $offset / 60 / 60 );
$minutes = abs( $offset ) / 60 - intval( abs( $offset ) / 60 / 60 ) * 60;
$format = "+%02d%02d";
if ( $hours < 0 ) {
$format = "%03d%02d";
}
return sprintf( $format, $hours, $minutes );
}
/**
* Get the body with all the events of the .ics file.
*
* @since 4.9.4
* @since 5.1.6 - Utilize get_ical_output_for_an_event() to get the iCal output.
*
* @param array $posts The array of events to generate the iCal content for.
*
* @return string A string containing all the event information needed in the iCal feed/file.
*/
protected function get_body( $posts = [] ) {
$tec = Tribe__Events__Main::instance();
$events = '';
foreach ( $posts as $event_post ) {
$item = $this->get_ical_output_for_an_event( $event_post, $tec );
$events .= "BEGIN:VEVENT\r\n" . implode( "\r\n", $item ) . "\r\nEND:VEVENT\r\n";
}
return $events;
}
/**
* Sanitize organizer name.
*
* @since 6.2.2
*
* @param string $name The organizer name (post title).
*
* @return string The sanitized organizer name.
*/
private function sanitize_organizer_name( string $name ): string {
// Characters not allowed in organizer name: CTLs, DQUOTE, ";", ":", ","
$sanitized_name = rawurlencode( $name );
// Array of characters to allow in organizer name.
$chars = [ ' ', '&', '!', '?', "'", '*', '(', ')', '@', '#', '$', '%', '^', '+', '=', '{', '}', '[', ']', '|', '\\', '/', '<', '>', '`', '~' ];
$encoded_chars = array_map( 'rawurlencode', $chars );
// Since single quotes are allowed, let's convert any double quotes to single quotes.
$encoded_chars[] = rawurlencode( '"' );
$chars[] = "'";
return str_replace( $encoded_chars, $chars, $sanitized_name );
}
/**
* Get the iCal Output for the provided event object.
*
* @since 5.1.6
* @since 6.2.2 Sanitize organizer name using new method.
*
* @param \WP_Post $event_post The event post object.
* @param \Tribe__Events__Main $tec An instance of the main TEC Class.
*
* @return array An array of iCal output fields.
*/
public function get_ical_output_for_an_event( $event_post, Tribe__Events__Main $tec ) {
// Add fields to iCal output.
$item = [];
$access_to_content = self::has_access_to_see_event_content( $event_post );
$full_format = 'Ymd\THis';
$utc_format = 'Ymd\THis\Z';
$all_day = ( 'yes' === get_post_meta( $event_post->ID, '_EventAllDay', true ) );
$time = (object) [
'start' => tribe_get_start_date( $event_post->ID, false, 'U' ),
'end' => tribe_get_end_date( $event_post->ID, false, 'U' ),
'modified' => Tribe__Date_Utils::wp_strtotime( $event_post->post_modified ),
'created' => Tribe__Date_Utils::wp_strtotime( $event_post->post_date ),
];
$type = 'DATE-TIME';
$format = $full_format;
if ( $all_day ) {
$type = 'DATE';
$format = 'Ymd';
}
$tzoned = (object) [
'start' => Tribe__Date_Utils::build_date_object( $time->start )->format( $format ),
'end' => Tribe__Date_Utils::build_date_object( $time->end )->format( $format ),
'modified' => Tribe__Date_Utils::build_date_object( $time->modified )->format( $utc_format ),
'created' => Tribe__Date_Utils::build_date_object( $time->created )->format( $utc_format ),
];
$dtstart = $tzoned->start;
$dtend = $tzoned->end;
if ( 'DATE' === $type ) {
// For all day events dtend should always be +1 day.
if ( $all_day ) {
$dtend = Tribe__Date_Utils::build_date_object( strtotime( '+1 day', strtotime( $dtend ) ) )->format( $format );
}
$item['DTSTART'] = 'DTSTART;VALUE=' . $type . ':' . $dtstart;
$item['DTEND'] = 'DTEND;VALUE=' . $type . ':' . $dtend;
} else {
// Are we using the site-wide timezone or the local event timezone?
$timezone_name = $this->get_timezone( $event_post );
$timezone = Tribe__Events__Timezones::build_timezone_object( $timezone_name );
$item['DTSTART'] = 'DTSTART;TZID=' . $timezone->getName() . ':' . $dtstart;
$item['DTEND'] = 'DTEND;TZID=' . $timezone->getName() . ':' . $dtend;
}
$item['DTSTAMP'] = 'DTSTAMP:' . Tribe__Date_Utils::build_date_object()->format( $full_format );
$item['CREATED'] = 'CREATED:' . $tzoned->created;
$item['LAST-MODIFIED'] = 'LAST-MODIFIED:' . $tzoned->modified;
$item['UID'] = 'UID:' . $event_post->ID . '-' . $time->start . '-' . $time->end . '@' . wp_parse_url( home_url( '/' ), PHP_URL_HOST );
$item['SUMMARY'] = 'SUMMARY:' . $this->replace( wp_strip_all_tags( $event_post->post_title ) );
if ( $access_to_content ) {
/**
* Allows filtering the event description in the iCal feed.
*
* @since 4.9.4
*
* @param string $content The event description (post content).
*/
$content = apply_filters( 'the_content', tribe( 'editor.utils' )->exclude_tribe_blocks( $event_post->post_content ) );
} else {
$content = _x( 'Content is protected.', 'Description in iCal content for events with hidden/protected content.', 'the-events-calendar' );
/**
* Filters the password protected description for iCal event descriptions that are displayed in the output.
*
* @since 6.1.3
*
* @param string $content The replaced message that will display in the ical event description.
*/
$content = apply_filters( 'tec_events_ical_protected_content_description', $content );
}
$item['DESCRIPTION'] = 'DESCRIPTION:' . $this->replace( wp_strip_all_tags( str_replace( '</p>', '</p> ', $content ) ) );
$item['URL'] = 'URL:' . get_permalink( $event_post->ID );
// Add location if available.
$location = \Tribe__Events__Venue::get_address_full_string( $event_post->ID );
if ( ! empty( $location ) ) {
$str_location = $this->replace( $location, [ ',', "\n" ], [ '\,', '\n' ] );
$item['LOCATION'] = 'LOCATION:' . $str_location;
}
// Add categories if available.
$event_cats = wp_get_object_terms( $event_post->ID, Tribe__Events__Main::TAXONOMY, [ 'fields' => 'names' ] );
if ( ! is_wp_error( $event_cats ) && ! empty( $event_cats ) ) {
$item['CATEGORIES'] = 'CATEGORIES:' . $this->html_decode( join( ',', (array) $event_cats ) );
}
// Add featured image if available.
if ( has_post_thumbnail( $event_post->ID ) && $access_to_content ) {
$thumbnail_id = get_post_thumbnail_id( $event_post->ID );
$thumbnail_url = wp_get_attachment_url( $thumbnail_id );
$thumbnail_mime_type = get_post_mime_type( $thumbnail_id );
/**
* Allow for customization of an individual iCal-exported event's thumbnail.
*
* @since 4.6.2
*
* @param string $string This thumbnail's iCal-formatted "ATTACH;" string with the thumbnail mime type and URL.
* @param int $post_id The ID of the event this thumbnail belongs to.
*/
$item['ATTACH'] = apply_filters( 'tribe_ical_feed_item_thumbnail', sprintf( 'ATTACH;FMTTYPE=%s:%s', $thumbnail_mime_type, $thumbnail_url ), $event_post->ID );
}
// Add organizer if available.
$organizer_email = tribe_get_organizer_email( $event_post->ID, false );
if ( $organizer_email ) {
$organizer_id = tribe_get_organizer_id( $event_post->ID );
$organizer = get_post( $organizer_id );
if ( $organizer_id ) {
$sanitized_name = $this->sanitize_organizer_name( $organizer->post_title );
$item['ORGANIZER'] = sprintf( 'ORGANIZER;CN="%s":MAILTO:%s', $sanitized_name, $organizer_email );
} else {
$item['ORGANIZER'] = sprintf( 'ORGANIZER:MAILTO:%s', $organizer_email );
}
}
/**
* Allow for customization of an individual "VEVENT" item to be rendered inside an iCal export file.
*
* @since 4.6.2
*
* @param array $item The various iCal file format components of this specific event item.
* @param object $event_post The WP_Post of this event.
*/
return apply_filters( 'tribe_ical_feed_item', $item, $event_post );
}
/**
* Replace the text and encode the text before doing the replacement.
*
* @since 4.9.4
*
* @param string $text The text to be replaced.
* @param array $search What elements to search to replace.
* @param array $replacement New values used to replace.
*
* @return mixed
*/
protected function replace( $text = '', $search = [], $replacement = [] ) {
$search = empty( $search ) ? [ ',', "\n", "\r" ] : $search;
$replacement = empty( $replacement ) ? [ '\,', '\n', '' ] : $replacement;
return str_replace( $search, $replacement, $this->html_decode( $text ) );
}
/**
* Apply html_entity_decode on a string using ENT_QUOTES style.
*
* @since 4.9.4
*
* @param string $text The text to be encoded.
*
* @return string The encoded text.
*/
protected function html_decode( $text = '' ) {
return html_entity_decode( $text, ENT_QUOTES );
}
/**
* Return the time zone name associated with the event.
*
* @since 4.9.4
*
* @param WP_Post $event The event post.
*
* @return string The time zone string of the event in the format of 'America/New_York'.
*/
protected function get_timezone( $event ) {
return Tribe__Events__Timezones::EVENT_TIMEZONE === Tribe__Events__Timezones::mode()
? Tribe__Events__Timezones::get_event_timezone_string( $event->ID )
: Tribe__Events__Timezones::wp_timezone_string();
}
/**
* Return the end of the .ics file.
*
* @since 4.9.4
*
* @return string
*/
protected function get_end() {
return 'END:VCALENDAR';
}
/**
* Get a list of events, the function makes sure it uses the default values used on the main events page,
* so if is called from a different location like a page or post (shortcode) it will retain the original values
* to generate the events feed.
*
* @since 4.6.11
*
* @param array $args The WP_Query arguments.
* @param mixed $query A WP_Query object or null if none.
*
* @return array
*/
protected function get_events_list( $args = [], $query = null ) {
/**
* Filter the arguments used to construct the call to get the list of events.
*
* @since 4.6.11
*
* @param array $args Arguments used in WP_Query call.
*/
$args = apply_filters( 'tribe_events_ical_events_list_args', $args );
/**
* Filter the Query object used to get the list of events used to populate the feed.
*
* @since 4.6.11
*
* @param mixed $query a WP_Query or null.
*/
$query = apply_filters( 'tribe_events_ical_events_list_query', $query );
$count = $this->feed_posts_per_page();
$query_posts_per_page = 0;
if ( $query instanceof WP_Query ) {
$query_posts_per_page = $query->get( 'posts_per_page' );
}
$list = [];
// When `posts_per_page` is set to `-1` we can slice.
if ( $query_posts_per_page >= 0 && $count > $query_posts_per_page ) {
$args['posts_per_page'] = $count;
$events_query = tribe_get_events( wp_parse_args( $args, [ 'posts_per_page' => $this->feed_posts_per_page() ] ), true );
$list = $events_query->get_posts();
} elseif ( $query instanceof WP_Query ) {
$list = array_slice( $query->posts, 0, $count );
}
return $list;
}
/**
* Get the number of posts per page to be used in the iCal feed, make sure it passes the value via the filter
* tribe_ical_feed_posts_per_page and validates the number is greater than 0.
*
* @since 4.6.11
*
* @return int
*/
public function feed_posts_per_page() {
/**
* Filters the number of upcoming events the iCal feed should export.
*
* This filter allows developers to override the pagination setting and the default value
* to export a number of events that's inferior or superior to the one shown on the page.
* The minimum value is 1.
*
* @since 4.6.11
*
* @param int $count The number of upcoming events that should be exported in the
* feed, defaults to 30.
*/
$count = apply_filters( 'tribe_ical_feed_posts_per_page', $this->feed_default_export_count );
return is_numeric( $count ) && is_int( $count ) && $count > 0
? $count
: $this->feed_default_export_count;
}
/**
* Gets the number of events that should be exported when generating the iCal feed.
*
* @since 4.3.3
*
* @return int
*/
public function get_feed_default_export_count() {
return $this->feed_default_export_count;
}
/**
* Sets the number of events that should be exported when generating the iCal feed.
*
* @since 4.3.3
*
* @param int $count
*/
public function set_feed_default_export_count( $count ) {
$this->feed_default_export_count = $count;
}
}