<?php
/**
 * Date Functions
 *
 * Display functions (template-tags) for use in WordPress templates.
 */


use Tribe__Date_Utils as Dates;
use Tribe__Timezones as Timezones;

if ( ! function_exists( 'tribe_get_display_end_date' ) ) {
	/**
	 * End Date formatted for display
	 *
	 * Returns the event end date that observes the end of day cutoff
	 *
	 * @category Events
	 * @see      http://php.net/manual/en/function.date.php
	 *
	 * @param int|WP_Post $event        The event (optional).
	 * @param bool        $display_time If true shows date and time, if false only shows date.
	 * @param string      $date_format  Allows date and time formatting using standard php syntax.
	 * @param string      $timezone     Timezone in which to present the date/time (or default behaviour if not set).
	 *
	 * @return string|null Date
	 */
	function tribe_get_display_end_date( $event = null, $display_time = true, $date_format = '', $timezone = null ) {
		$timestamp = tribe_get_end_date( $event, true, 'U', $timezone );
		$beginning_of_day = tribe_beginning_of_day( date( Tribe__Date_Utils::DBDATETIMEFORMAT, (int) $timestamp ) );

		if ( tribe_event_is_multiday( $event ) && $timestamp < strtotime( $beginning_of_day ) ) {
			$timestamp -= DAY_IN_SECONDS;
		}

		$formatted_date = tribe_format_date( $timestamp, $display_time, $date_format );

		/**
		 * Filters the displayed end date of an event, which factors in the EOD cutoff.
		 *
		 * @since 4.5.10
		 *
		 * @see tribe_get_display_end_date()
		 *
		 * @param string      $formatted_date Formatted date for the last day of the event.
		 * @param int         $timestamp      Timestamp calculated for the last day of the event.
		 * @param mixed       $event          The event.
		 * @param bool        $display_time   If true shows date and time, if false only shows date.
		 * @param string      $date_format    Allows date and time formatting using standard php syntax.
		 * @param string|null $timezone       Timezone in which to present the date/time (or default behaviour if not set).
		 *
		 */
		return apply_filters( 'tribe_get_display_end_date', $formatted_date, $timestamp, $event, $display_time, $date_format, $timezone );
	}
}

if ( ! function_exists( 'tribe_event_is_on_date' ) ) {
	/**
	 * Given a date and an event, returns true or false if the event is happening on that date
	 * This function properly adjusts for the EOD cutoff and multi-day events
	 *
	 * @param null $date
	 * @param null $event
	 *
	 * @return mixed|void
	 */
	function tribe_event_is_on_date( $date = null, $event = null ) {

		if ( null === $date ) {
			$date = current_time( 'mysql' );
		}

		if ( null === $event ) {
			global $post;
			$event = $post;
			if ( empty( $event ) ) {
				_doing_it_wrong( __FUNCTION__, esc_html__( 'The function needs to be passed an $event or used in the loop.', 'the-events-calendar' ), '3.10' );
				return false;
			}
		}

		$start_of_day     = tribe_beginning_of_day( $date, 'U' );
		$end_of_day       = tribe_end_of_day( $date, 'U' );
		$event_start      = tribe_get_start_date( $event, null, 'U' );
		$event_end        = tribe_get_end_date( $event, null, 'U' );

		// kludge
		if ( ! empty( $event->_end_date_fixed ) ) {
			// @todo [BTRIA-613]: remove this once we can have all day events without a start / end time.
			$event_end = date_create( date( Tribe__Date_Utils::DBDATETIMEFORMAT, $event_end ) );
			$event_end->modify( '+1 day' );
			$event_end    = $event_end->format( 'U' );
		}

		/*
		* Note:
		* events that start exactly on the EOD cutoff will count on the following day
		* events that end exactly on the EOD cutoff will count on the previous day
		*/

		$event_is_on_date = Tribe__Date_Utils::range_coincides( $start_of_day, $end_of_day, $event_start, $event_end );

		return apply_filters( 'tribe_event_is_on_date', $event_is_on_date, $date, $event );
	}
}

if ( ! function_exists( 'tribe_events_timezone_choice' ) ) {
	/**
	 * Event-specific wrapper for wp_timezone_choice().
	 *
	 * @since 4.6.5
	 *
	 * @param string $selected_zone
	 * @param string $locale (optional)
	 *
	 * @return string
	 */
	function tribe_events_timezone_choice( $selected_zone, $locale = null ) {
		/**
		 * Opportunity to modify the timezone <option>s used within the timezone picker.
		 *
		 * @since 4.6.5
		 *
		 * @param string $html
		 * @param string $selected_zone
		 * @param string $locale
		 */
		return apply_filters(
			'tribe_events_timezone_choice',
			wp_timezone_choice( $selected_zone, $locale ),
			$selected_zone,
			$locale
		);
	}
}

if ( ! function_exists( 'tribe_event_ends_on' ) ) {
	/**
	 * Checks whether the specified event ends on date or not.
	 *
	 * The method is aware of timezone settings and will mark an event as ending on a date depending on that.
	 * E.g. an America/Los_Angeles, 2019-04-10, 2pm to 7pm event ends on the same day if using the
	 * America/Los_Angeles timezone but ends on the following day (4am of 2019-04-11) in the Paris timezone.
	 * The method id day based, hours and minutes, if provided in the date, are not considered.
	 *
	 * @since 4.9
	 *
	 * @param WP_Post|int $event The event post object; the `EventEndDate` property must be set.
	 * @param mixed      $date  The date to compare the event end date with; it can be an object, string or timestamp.
	 *
	 * @return bool Whether the specified date is the last day of the event, timezone-wise, or not.
	 */
	function tribe_event_ends_on( $event, $date ) {
		$post = get_post( $event );

		if ( ! $post instanceof WP_Post ) {
			return false;
		}

		$event_end_date = get_post_meta( $post->ID, '_EventEndDate', true );

		if ( empty( $event_end_date ) ) {
			return false;
		}

		$use_site_timezone = Timezones::is_mode( 'site' );
		$timezone = $use_site_timezone
			? Timezones::build_timezone_object()
			: Timezones::build_timezone_object( get_post_meta( $event->ID, '_EventTimezone', true ) );
		$end_date = Dates::build_date_object( $event->EventEndDate, $timezone )->format( 'Y-m-d' );
		$formatted_date = Dates::build_date_object( $date, $timezone )->format( 'Y-m-d' );

		return $formatted_date === $end_date;
	}
}
