Hide/show GCal links according to stock (WooTickets) (2)

<?php
/**
* Custom tickets.php template re:
* http://tri.be/support/forums/topic/disable-add-to-google-calendar-and-ical-import-when-tickets-are-unavailable/
*/

global $woocommerce, $wooticket_stock;
$wooticket_stock = 0;

?>

<form action="<?php echo esc_url( add_query_arg( 'wootickets_process', 1, $woocommerce->cart->get_cart_url() ) ); ?>"
      class="cart" method="post"
      enctype='multipart/form-data'>
    <table width="100%" class="tribe-events-tickets">
        <?php

        $is_there_any_product         = false;
        $is_there_any_product_to_sell = false;

        $gmt_offset = ( get_option( 'gmt_offset' ) >= '0' ) ? ' +' . get_option( 'gmt_offset' ) : " " . get_option( 'gmt_offset' );
        $gmt_offset = str_replace( array( '.25', '.5', '.75' ), array( ':15', ':30', ':45' ), $gmt_offset );

        ob_start();
        foreach ( $tickets as $ticket ) {

            global $product;

            if ( class_exists( 'WC_Product_Simple' ) ) {
                $product = new WC_Product_Simple( $ticket->ID );
            } else {
                $product = new WC_Product( $ticket->ID );
            }

            $end_date = $ticket->end_date;
            if ( empty( $ticket->end_date ) ) {

                $event_end_date = tribe_get_end_date();

                if ( tribe_get_all_day( get_the_ID() ) )
                    $event_end_date = date( get_option( 'date_format' ) . ' ' . get_option( 'time_format' ), strtotime( TribeDateUtils::endOfDay( $event_end_date ) ) );

                $end_date = apply_filters( 'wootickets_default_end_date', $event_end_date, $ticket->ID );

                if ( method_exists( 'DateTime', 'createFromFormat' ) ) {
                    $end_date = DateTime::createFromFormat( get_option( 'date_format' ) . ' ' . get_option( 'time_format' ), $end_date );
                } else {
                    $end_date = new DateTime( date( get_option( 'date_format' ) . ' ' . get_option( 'time_format' ), strtotime( $end_date ) ) );
                }

                if ( !empty( $end_date ) )
                    $end_date = $end_date->format( 'Y-m-d g:i a' );
            }
            $end_date = strtotime( $end_date . $gmt_offset );

            $start_date = null;
            if ( !empty( $ticket->start_date ) )
                $start_date = strtotime( $ticket->start_date . $gmt_offset );
//              if ( !empty( $ticket->start_date ) ) {
//                  $start_date = DateTime::createFromFormat( get_option( 'date_format' ), $ticket->start_date );
//                  $start_date = strtotime( $start_date->format( 'Y-m-d' ) . $gmt_offset );
//              }


            if ( ( !$product->is_in_stock() ) || ( empty( $start_date ) || time() > $start_date ) && ( time() < $end_date ) ) {

                $is_there_any_product = true;

                echo sprintf( "<input type='hidden' name='product_id[]' value='%d'>", $ticket->ID );

                echo "<tr>";
                echo "<td width='75' class='woocommerce'>";


                if ( $product->is_in_stock() ) {

                    woocommerce_quantity_input( array( 'input_name'  => 'quantity_' . $ticket->ID,
                        'input_value' => 0,
                        'min_value'   => 0,
                        'max_value'   => $product->backorders_allowed() ? '' : $product->get_stock_quantity(), ) );

                    $is_there_any_product_to_sell = true;

                } else {
                    echo "<span class='tickets_nostock'>" . esc_html__( 'Out of stock!', 'tribe-wootickets' ) . "</span>";
                }
                echo "</td>";

                echo "<td nowrap='nowrap' class='tickets_name'>";
                echo $ticket->name;
                echo "</td>";

                echo "<td class='tickets_price'>";
                echo $product->get_price_html();
                echo "</td>";

                echo "<td class='tickets_description'>";
                echo $ticket->description;
                echo "</td>";

                $wooticket_stock += $ticket->stock;

                echo "</tr>";
            }

        }
        $contents = ob_get_clean();
        if ( $is_there_any_product ) {
            ?>
            <h2 class="tribe-events-tickets-title"><?php _e( 'Tickets', 'tribe-wootickets' );?></h2>
            <?php echo $contents; ?>
            <?php if ( $is_there_any_product_to_sell ) { ?>
                <tr>
                    <td colspan="4" class='woocommerce'>

                        <button type="submit"
                                class="button alt"><?php esc_html_e( 'Add to cart', 'tribe-wootickets' );?></button>
                    </td>
                </tr>
            <?php
            }
        }
        ?>

    </table>

</form>