Add compatibility for WooCredits

[Valentina R]

Requested here.

FYI, the old code snippet does not work.

[Željan Topić]

I’ll look into this. Can’t remember sharing the code snippet for woocredits.

[Željan Topić]

Code snippet your shared should work. Otherwise, here's a simple snippet others can use if needed:

/**
 * Woo Credits integration class.
 * http://www.woocredits.com/
 */
class WCA_Woo_Download_Credits {
    function __construct() {
        add_action( 'woocommerce_product_options_general_product_data', array( $this, 'add_custom_general_fields' ) );
        add_action( 'woocommerce_process_product_meta', array($this, 'add_custom_general_fields_save' ) );
        add_action( 'wp_insert_post', array($this, 'product_custom_meta_data_save' ) );
        add_action( 'save_post', array($this, 'product_custom_meta_data_save' ) );
        add_action( 'admin_head', array( $this, 'show_options_at_all_times' ) );
    }

    /**
     * Add Woo Credits input to edit product screen.
     *
     * @return void
     */
    public function add_custom_general_fields() {
        global $woocommerce, $post;
        $product_id = $post->ID;
        $_product = wc_get_product( $product_id );
        if ( 'appointment' == $_product->product_type ) {
            echo '<div class="options_group woo-credit-price">';
            woocommerce_wp_text_input(
                array(
                    'id' => '_credits_amount',
                    'label' => __('Woo Credits Price ', 'your_gettext'),
                    'placeholder' => '',
                    'desc_tip' => 'true',
                    'description' => __('The credits price for this product.', 'your_gettext'),
                    'type' => 'text',
                )
            );
            echo '</div>';
        }
    }

    /**
     * Save option.
     *
     * @return void
     */
    public function add_custom_general_fields_save( $post_id ) {
        $woocommerce_credits_amount = $_POST['_credits_amount'];
        $_product = wc_get_product( $post_id );
        if ( !empty( $woocommerce_credits_amount ) && 'appointment' == $_product->get_type() ) {
            update_post_meta( $post_id, '_credits_amount', esc_attr( $woocommerce_credits_amount ) );
        }
    }

    /**
     * Save option.
     *
     * @return void
     */
    public function product_custom_meta_data_save( $post_id ) {
        if ( !isset($_POST['post_type']) || 'product' != $_POST['post_type'] ) {
            return;
        }
        $woocommerce_credits_amount = $_POST['_credits_amount'];
        $_product = wc_get_product( $post_id );
        if ( !empty( $woocommerce_credits_amount ) && 'appointment' == $_product->get_type() ) {
            update_post_meta( $post_id, '_credits_amount', esc_attr( $woocommerce_credits_amount ) );
        }
    }

    /**
     * Show Woo Credits input that is hidden by default.
     *
     * @return void
     */
    public function show_options_at_all_times() {
        echo '<style>
            .woocommerce_options_panel .wdc-hide.options_group.woo-credit-price {
                display: block!important;
            }
        </style>';
    }
}

new WCA_Woo_Download_Credits();