Upcoming Events List Shortcode (The Events Calendar)

add_shortcode( 'wpide_upcoming_events', function ( $atts ) {
    if ( ! function_exists( 'tribe_get_events' ) ) {
        return '';
    }

    $atts = shortcode_atts( array( 'number' => 5, 'category' => '', 'featured' => '' ), $atts, 'wpide_upcoming_events' );
    $key  = 'wpide_tec_upcoming_' . md5( wp_json_encode( $atts ) ) . '_' . (int) get_option( 'wpide_tec_ver', 1 );
    $html = get_transient( $key );

    if ( false !== $html ) {
        return $html;
    }

    $args = array(
        'posts_per_page' => min( 20, max( 1, absint( $atts['number'] ) ) ),
        'start_date'     => 'now',
        'eventDisplay'   => 'list',
    );

    if ( '' !== $atts['category'] ) {
        $args['tax_query'] = array( array( 'taxonomy' => 'tribe_events_cat', 'field' => 'slug', 'terms' => sanitize_title( $atts['category'] ) ) ); // phpcs:ignore WordPress.DB.SlowDBQuery
    }
    if ( $atts['featured'] ) {
        $args['featured'] = true;
    }

    $events = tribe_get_events( $args );
    $html   = '';

    if ( $events ) {
        $html = '<ul class="wpide-upcoming-events">';
        foreach ( $events as $event ) {
            $venue = function_exists( 'tribe_get_venue' ) ? tribe_get_venue( $event->ID ) : '';
            $html .= sprintf(
                '<li><a href="%1$s">%2$s</a><br><small>%3$s%4$s</small></li>',
                esc_url( get_permalink( $event ) ),
                esc_html( get_the_title( $event ) ),
                esc_html( tribe_get_start_date( $event, ! tribe_event_is_all_day( $event->ID ) ) ),
                $venue ? ' · ' . esc_html( $venue ) : ''
            );
        }
        $html .= '</ul>';
    } else {
        $html = '<p class="wpide-upcoming-events-empty">' . esc_html__( 'No upcoming events right now.' ) . '</p>';
    }

    set_transient( $key, $html, 15 * MINUTE_IN_SECONDS );

    return $html;
} );

add_action( 'save_post_tribe_events', function () {
    update_option( 'wpide_tec_ver', (int) get_option( 'wpide_tec_ver', 1 ) + 1, false );
} );