<?php
/**
* My Calendar API - get events outside of My Calendar UI
*
* @category Events
* @package My Calendar
* @author Joe Dolson
* @license GPLv2 or later
* @link https://www.joedolson.com/my-calendar/
*/
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
/**
* Main API function
*/
function my_calendar_api() {
if ( isset( $_REQUEST['my-calendar-api'] ) || isset( $_REQUEST['mc-api'] ) ) {
if ( 'true' === mc_get_option( 'api_enabled' ) ) {
/**
* Filter to test access to the event API. Default 'true'.
*
* @hook mc_api_key
*
* @param {bool} $api_key Return true to allow access. Use filter to control or limit access.
*
* @return {bool}
*/
$api_key = apply_filters( 'mc_api_key', true );
if ( $api_key ) {
$request = map_deep( wp_unslash( $_REQUEST ), 'sanitize_text_field' );
$format = ( isset( $request['my-calendar-api'] ) ) ? $request['my-calendar-api'] : 'json';
$format = ( isset( $request['mc-api'] ) ) ? $request['mc-api'] : $format;
$from = ( isset( $request['from'] ) ) ? $request['from'] : current_time( 'Y-m-d' );
$range = '+ 7 days';
/**
* Default date for API 'to' parameter. Default '+ 7 days'.
*
* @hook mc_api_auto_date
*
* @param {string} $time A time string convertable using strtotime.
*
* @return {string}
*/
$adjust = apply_filters( 'mc_api_auto_date', $range );
$to = ( isset( $request['to'] ) ) ? $request['to'] : mc_date( 'Y-m-d', strtotime( $adjust ) );
$category = ( isset( $request['mcat'] ) ) ? $request['mcat'] : '';
$ltype = ( isset( $request['ltype'] ) ) ? $request['ltype'] : '';
$lvalue = ( isset( $request['lvalue'] ) ) ? $request['lvalue'] : '';
$author = ( isset( $request['author'] ) ) ? $request['author'] : '';
$host = ( isset( $request['host'] ) ) ? $request['host'] : '';
$search = ( isset( $request['search'] ) ) ? $request['search'] : '';
$args = array(
'from' => $from,
'to' => $to,
'category' => $category,
'ltype' => $ltype,
'lvalue' => $lvalue,
'author' => $author,
'host' => $host,
'search' => $search,
'source' => 'api',
);
/**
* Filter arguments submitted to the API.
*
* @hook mc_filter_api_args
*
* @param {array} $args Keys: ['from', 'to', 'category', 'ltype', 'lvalue', 'author', 'host', 'search'].
* @param {array} $request $_REQUEST parameters, sanitized.
*
* @return {array}
*/
$args = apply_filters( 'mc_filter_api_args', $args, $request );
$data = my_calendar_events( $args );
$output = mc_format_api( $data, $format );
echo wp_kses_post( $output );
}
die;
} else {
esc_html_e( 'The My Calendar API is not enabled.', 'my-calendar' );
}
}
}
/**
* Check which format the API should return
*
* @param array $data Array of event objects.
* @param string $format Format to return.
*/
function mc_format_api( $data, $format ) {
switch ( $format ) {
case 'json':
mc_api_format_json( $data );
break;
case 'csv':
mc_api_format_csv( $data );
break;
case 'ical':
mc_api_format_ical( $data );
break;
}
}
/**
* JSON formatted events
*
* @param array $data array of event objects.
*/
function mc_api_format_json( $data ) {
wp_send_json( $data );
}
/**
* CSV formatted events
*
* @param array $data array of event objects.
*/
function mc_api_format_csv( $data ) {
if ( ob_get_contents() ) {
ob_clean();
}
ob_start();
$keyed = false;
// Create a stream opening it with read / write mode.
$stream = fopen( 'php://output', 'w' );
// Iterate over the data, writing each line to the text stream.
foreach ( $data as $key => $val ) {
foreach ( $val as $v ) {
$values = get_object_vars( $v );
unset( $values['categories'] );
unset( $values['location'] );
$values['UID'] = $values['uid'];
// If this is an import from Pro, insert locations into DB.
if ( ! ( isset( $_GET['file'] ) && 'false' === $_GET['file'] ) ) {
$values['event_category'] = $values['category_name'];
unset( $values['uid'] );
unset( $values['site_id'] );
unset( $values['ts_occur_end'] );
unset( $values['ts_occur_begin'] );
unset( $values['category_term'] );
unset( $values['category_id'] );
unset( $values['category_name'] );
unset( $values['event_group'] );
unset( $values['event_location'] );
unset( $values['event_post'] );
unset( $values['occur_event_id'] );
unset( $values['occur_group_id'] );
unset( $values['event_id'] );
}
foreach ( $values as $key => $text ) {
$values[ $key ] = str_replace( array( "\r\n", "\r", "\n" ), '<br class="mc-export" />', trim( wp_kses_stripslashes( $text ) ) );
}
if ( ! $keyed ) {
$keys = array_keys( $values );
fputcsv( $stream, $keys );
$keyed = true;
}
fputcsv( $stream, $values );
}
}
// Echo the content as a file. Use content-type headers if for download.
if ( ! ( isset( $_GET['file'] ) && 'false' === $_GET['file'] ) ) {
// If accessing remotely as content.
header( 'Content-type: text/csv' );
header( 'Content-Disposition: attachment; filename=my-calendar.csv' );
}
header( 'Pragma: no-cache' );
header( 'Expires: 0' );
echo stream_get_contents( $stream );
// Close the stream.
fclose( $stream );
ob_end_flush();
die;
}
/**
* Export single event as iCal file
*/
function mc_export_vcal() {
if ( isset( $_GET['vcal'] ) ) {
$vcal = absint( $_GET['vcal'] );
print wp_kses_post( my_calendar_send_vcal( $vcal ) );
die;
}
}
/**
* Send iCal event to browser
*
* @param integer $event_id Event ID.
*
* @return string headers & text for iCal event.
*/
function my_calendar_send_vcal( $event_id ) {
$sitename = sanitize_title( get_bloginfo( 'name' ) );
header( 'Content-Type: text/calendar' );
header( 'Cache-control: private' );
header( 'Pragma: private' );
header( 'Expires: Thu, 11 Nov 1977 05:40:00 GMT' ); // That's my birthday. :).
header( "Content-Disposition: inline; filename=my-calendar-$event_id-$sitename.ics" );
$output = mc_generate_vcal( $event_id );
return $output;
}
/**
* Generate iCal formatted event for one event
*
* @param int $event_id Event ID or false to get active event.
*
* @return string text for iCal
*/
function mc_generate_vcal( $event_id ) {
$output = '';
$mc_id = ( isset( $_GET['vcal'] ) ) ? absint( str_replace( 'mc_', '', wp_unslash( $_GET['vcal'] ) ) ) : $event_id;
if ( $mc_id ) {
$event = mc_get_event( $mc_id );
$output = mc_generate_ical( array( $event ) );
}
return $output;
}
/**
* Generate an iCal subscription export with most recently added events by category.
*/
function mc_ics_subscribe() {
// get event category.
if ( isset( $_GET['mcat'] ) ) {
$cat_id = (int) $_GET['mcat'];
} else {
$cat_id = false;
}
$events = mc_get_new_events( $cat_id );
mc_api_format_ical( $events );
}
/**
* Generate Google subscribe feed data.
*/
function mc_ics_subscribe_google() {
mc_ics_subscribe( 'google' );
}
/**
* Generate Outlook subscribe feed data.
*/
function mc_ics_subscribe_outlook() {
mc_ics_subscribe( 'outlook' );
}
/**
* Generate ICS export of current period of events
*/
function my_calendar_ical() {
$p = ( isset( $_GET['span'] ) ) ? 'year' : false;
$y = ( isset( $_GET['yr'] ) ) ? absint( $_GET['yr'] ) : mc_date( 'Y' );
$m = ( isset( $_GET['month'] ) ) ? absint( $_GET['month'] ) : mc_date( 'n' );
$ny = ( isset( $_GET['nyr'] ) ) ? absint( $_GET['nyr'] ) : $y;
$nm = ( isset( $_GET['nmonth'] ) ) ? absint( $_GET['nmonth'] ) : $m;
$cat = ( isset( $_GET['mcat'] ) ) ? intval( $_GET['mcat'] ) : '';
if ( $p ) {
$from = "$y-1-1";
$to = "$y-12-31";
} else {
$d = mc_date( 't', mktime( 0, 0, 0, $m, 1, $y ), false );
$from = "$y-$m-1";
$to = "$ny-$nm-$d";
}
/**
* Filter iCal download 'from' date.
*
* @hook mc_ical_download_from
*
* @param {string} $from Date string.
* @param {string} $p Date span.
*
* @return {string}
*/
$from = apply_filters( 'mc_ical_download_from', $from, $p );
/**
* Filter iCal download 'to' date.
*
* @hook mc_ical_download_to
*
* @param {string} $from Date string.
* @param {string} $p Date span.
*
* @return {string}
*/
$to = apply_filters( 'mc_ical_download_to', $to, $p );
$site = ( ! isset( $_GET['site'] ) ) ? get_current_blog_id() : intval( $_GET['site'] );
$args = array(
'from' => $from,
'to' => $to,
'category' => $cat,
'ltype' => '',
'lvalue' => '',
'author' => null,
'host' => null,
'search' => '',
'source' => 'calendar',
'site' => $site,
);
/**
* Filter calendar arguments for iCal output.
*
* @hook mc_ical_attributes
*
* @param {array} $args Array of calendar query args.
* @param {array} $get GET parameters, sanitized.
*
* @return {array}
*/
$args = apply_filters( 'mc_ical_attributes', $args, map_deep( $_GET, 'sanitize_text_field' ) );
// Load search result from $_SESSION array.
if ( isset( $_GET['searched'] ) && $_GET['searched'] && isset( $_SESSION['MC_SEARCH_RESULT'] ) ) {
$data = mc_get_searched_events();
} else {
$data = my_calendar_events( $args );
}
mc_api_format_ical( $data );
}
/**
* Output iCal formatted events
*
* @param array $data array of event objects.
*/
function mc_api_format_ical( $data ) {
$events = mc_flatten_array( $data );
$output = mc_generate_ical( $events );
if ( ! ( isset( $_GET['sync'] ) && 'true' === $_GET['sync'] ) ) {
$sitename = sanitize_title( get_bloginfo( 'name' ) );
header( 'Content-Type: text/calendar; charset=UTF-8' );
header( 'Pragma: no-cache' );
header( 'Expires: 0' );
header( "Content-Disposition: inline; filename=my-calendar-$sitename.ics" );
}
echo wp_kses_post( $output );
}
/**
* Translate a My Calendar recurrence pattern into an ical RRULE.
*
* @param object $event Event object.
*
* @return string
*/
function mc_generate_rrule( $event ) {
$rrule = '';
$by = '';
$repeat = $event->event_repeats;
$month = mc_date( 'm', strtotime( $event->event_begin ), false );
$day = mc_date( 'd', strtotime( $event->event_begin ), false );
$numday = mc_recur_date( mc_date( 'Y-m-d', strtotime( $event->event_begin ), false ) );
$recurs = str_split( $event->event_recur, 1 );
$recur = $recurs[0];
$every = ( isset( $recurs[1] ) ) ? str_replace( $recurs[0], '', $event->event_recur ) : 1;
switch ( $recur ) {
case 'S':
$rrule = '';
break;
case 'D':
$rrule = 'FREQ=DAILY';
break;
case 'E':
$rrule = 'FREQ=DAILY;BYDAY=MO,TU,WE,TH,FR';
break;
case 'W':
$rrule = 'FREQ=WEEKLY';
break;
case 'B':
$rrule = 'FREQ=WEEKLY'; // interval = 2.
break;
case 'M':
$by = 'BYMONTHDAY=' . $day;
$rrule = 'FREQ=MONTHLY';
break;
case 'U':
$fifth = $event->event_fifth_week;
if ( '1' === $fifth && 5 === $numday['num'] ) {
$by = 'BYDAY=-1' . strtoupper( substr( $numday['day'], 0, 2 ) );
} else {
$by = 'BYDAY=' . $numday['num'] . strtoupper( substr( $numday['day'], 0, 2 ) );
}
$rrule = 'FREQ=MONTHLY'; // Calculate which day/week the first date is for BYDAY= pattern.
break;
case 'Y':
$by = 'BYMONTH=' . $month . ';BYDAY=' . $day;
$rrule = 'FREQ=YEARLY';
break;
}
$interval = ( '1' !== $every ) ? 'INTERVAL=' . $every : '';
if ( is_numeric( $repeat ) ) {
$until = 'COUNT=' . $repeat;
} else {
$until = 'UNTIL=' . mc_date( 'Ymd\THis', strtotime( $repeat ), false ) . 'Z';
}
$rrule = ( '' !== $rrule ) ? "$rrule;$by;$interval;$until" : '';
$rrule = str_replace( array( ';;;', ';;' ), ';', $rrule );
return $rrule;
}
/**
* Generate alert parameters for an iCal event.
*
* @param array $alarm Parameters for describing an alarm.
*
* @return string iCal alert block.
*/
function mc_generate_alert_ical( $alarm ) {
$defaults = array(
'TRIGGER' => '-PT30M',
'REPEAT' => '0',
'DURATION' => '',
'ACTION' => 'DISPLAY',
'DESCRIPTION' => '{title}',
);
$values = array_merge( $defaults, $alarm );
$alert = PHP_EOL . 'BEGIN:VALARM' . PHP_EOL;
$alert .= "TRIGGER:$values[TRIGGER]\n";
$alert .= ( '0' !== $values['REPEAT'] ) ? "REPEAT:$values[REPEAT]\n" : '';
$alert .= ( '' !== $values['DURATION'] ) ? "REPEAT:$values[DURATION]\n" : '';
$alert .= "ACTION:$values[ACTION]\n";
$alert .= "DESCRIPTION:$values[DESCRIPTION]\n";
$alert .= 'END:VALARM';
return $alert;
}
/**
* Get events via the REST API.
*/
function my_calendar_rest_events() {
register_rest_route(
'my-calendar/v1',
'/events/',
array(
'methods' => 'GET',
'callback' => 'my_calendar_rest_route',
'args' => array(
'from' => array(
'default' => current_time( 'Y-m-d' ),
),
'to' => array(
'default' => mc_date( 'Y-m-d', strtotime( '+ 7 days' ) ),
),
'category' => array(),
'author' => array(),
'host' => array(),
'search' => array(),
'ltype' => array(),
'lvalue' => array(),
),
'permission_callback' => '__return_true',
)
);
}
add_action( 'rest_api_init', 'my_calendar_rest_events' );
/**
* Convert REST query into My Calendar event query.
*
* @param WP_REST_Request $request Request object.
*/
function my_calendar_rest_route( WP_REST_Request $request ) {
$parameters = $request->get_params();
$from = sanitize_text_field( $parameters['from'] );
$to = sanitize_text_field( $parameters['to'] );
$category = isset( $parameters['category'] ) ? absint( $parameters['category'] ) : '';
$ltype = isset( $parameters['ltype'] ) ? sanitize_text_field( $parameters['ltype'] ) : '';
$lvalue = isset( $parameters['lvalue'] ) ? sanitize_text_field( $parameters['lvalue'] ) : '';
$author = isset( $parameters['author'] ) ? sanitize_text_field( $parameters['author'] ) : '';
$host = isset( $parameters['host'] ) ? sanitize_text_field( $parameters['host'] ) : '';
$search = isset( $parameters['search'] ) ? sanitize_text_field( $parameters['search'] ) : '';
$args = array(
'from' => $from,
'to' => $to,
'category' => $category,
'ltype' => $ltype,
'lvalue' => $lvalue,
'author' => $author,
'host' => $host,
'search' => $search,
'source' => 'api',
);
$events = my_calendar_events( $args );
return $events;
}