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Add the ability to get a iCalendar format feed from any calendar #349

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Add the ability to get a iCalendar format feed from any calendar #349

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44f5da2
Add functionality to render a calendar into .ics when appending ?ics=…
randohinn Feb 13, 2022
a5703ad
Change to use the event uid so there is a uid for the GCAL Pro addon …
randohinn Feb 13, 2022
407c104
Fix end timestamp and prevent duplicates for multi-day events.
randohinn Feb 13, 2022
5b86498
Work on getting some fields to be more standards-compatible.
randohinn Feb 13, 2022
03d2450
Proper newlines
randohinn Mar 24, 2022
42aba84
Merge branch 'hinn-calendarfeeds' of https://github.com/randohinn/Sim…
randohinn Mar 24, 2022
e1e13eb
Merge branch 'main' into hinn-calendarfeeds
rosinghal Mar 14, 2023
f45a59a
Merge branch 'main' into hinn-calendarfeeds
rosinghal Mar 20, 2023
bf9effa
Merge branch 'main' into hinn-calendarfeeds
rosinghal Mar 31, 2023
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65 changes: 60 additions & 5 deletions includes/functions/shared.php
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Original file line number Diff line number Diff line change
Expand Up @@ -112,6 +112,62 @@ function simcal_get_calendar( $object ) {
$objects = \SimpleCalendar\plugin()->objects;
return $objects instanceof \SimpleCalendar\Objects ? $objects->get_calendar( $object ) : null;
}
/**
* Formats strings to ical standard
*
* @param string $s
*
* @return string
*/
function format_ical_string( $s ) {
$r = wordwrap(
preg_replace(
array( '/,/', '/;/', '/[\r\n]/' ),
array( '\,', '\;', '\n' ),
$s
), 73, "\n", TRUE
);

// Indent all lines but first:
$r = preg_replace( '/\n/', "\n ", $r );

return $r;
}


/**
* Compose and return a ics feed from the calendar
* @param string|int|object|WP_Post $object
* @return void
*
*/
function simcal_draw_calendar_ics($post) {
$calendar = simcal_get_calendar($post);
$events = $calendar->events;
header('Content-Type:text/calendar');
$ics = "BEGIN:VCALENDAR\r\nVERSION:2.0\r\nPRODID:-//Wordpress/Simple-Calendar\r\n";

foreach($events as $eventarr) {
$event = $eventarr[0];
if(strpos($ics, $event->uid) == false) {
$ics .= "BEGIN:VEVENT\r\n";
$ics .="UID:" . $event->uid . "\r\n";
$ics .="DTSTAMP:" . $event->start_dt->format('Ymd\THis') . "\r\n";
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I noticed that the timings are not matching, maybe because of timezone

Screenshot 2023-03-20 at 8 37 03 AM

(purple is ICS export and yellow is Google calendar)

$ics .= "ORGANIZER;CN=" . $event->source . ":MAILTO:".$event->source."\r\n";
$ics .= "DTSTART:" . $event->start_dt->format('Ymd\THis') . "\r\n";
$ics .= "DTEND:" . $event->end_dt->format('Ymd\THis') . "\r\n";
$ics.= "SUMMARY:" . format_ical_string($event->title) . "\r\n";
$ics .= "DESCRIPTION:" . format_ical_string($event->description) . "\r\n";
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It would nice to check if the description is present, if not we can skip adding the description.

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Same for LOCATION and GEO.

$ics .= "LOCATION:" . $event->start_location["name"] .';' . $event->start_location["address"] ."\r\n";
$ics .= "GEO:" . $event->start_location["lat"] . ';' . $event->start_location["lng"] . "\r\n";
$ics .= "END:VEVENT\r\n";
}

}

$ics .= 'END:VCALENDAR';
die($ics);
}

/**
* Get a calendar view.
Expand Down Expand Up @@ -140,7 +196,6 @@ function simcal_get_calendar_view( $id = 0, $name = '' ) {
function simcal_print_calendar( $object ) {

$calendar = simcal_get_calendar( $object );

if ( $calendar instanceof \SimpleCalendar\Abstracts\Calendar ) {
$calendar->html();
}
Expand Down Expand Up @@ -287,11 +342,11 @@ function simcal_default_event_template() {

$content = '<strong>' . '[title]' . '</strong>';
$content .= "\n\n";
$content .= '[when]' . "\n";
$content .= '[when]' . "\r\n";
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What are these changes for?

$content .= '[location]';
$content .= "\n";
$content .= "\r\n";
$content .= '<div>' . '[description]' . '</div>';
$content .= "\n" . '[link newwindow="yes"]' . __( 'See more details', 'google-calendar-events' ) . '[/link]';
$content .= "\r\n" . '[link newwindow="yes"]' . __( 'See more details', 'google-calendar-events' ) . '[/link]';

return apply_filters( 'simcal_default_event_template', $content );
}
Expand Down Expand Up @@ -485,4 +540,4 @@ function simcal_delete_feed_transients( $id = '' ) {
}

return delete_transient( '_simple-calendar_feed_ids' );
}
}
9 changes: 9 additions & 0 deletions includes/main.php
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Original file line number Diff line number Diff line change
Expand Up @@ -180,6 +180,13 @@ public function load_admin() {
}
}

public function simcal_ics_action() {
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Please fix the formatting, a tab is missing.

global $post;
if(isset($post) && $post->post_type == "calendar" && isset($_GET["ics"]) && $_GET["ics"] == true) {
simcal_draw_calendar_ics($post);
}
}

/**
* Init plugin when WordPress initializes.
*
Expand All @@ -198,6 +205,8 @@ public function init() {

// Upon init action hook.
do_action( 'simcal_init' );

add_action('template_redirect',array($this, 'simcal_ics_action'), 10 );
}

/**
Expand Down