Añadir atributos de producto en paginas woocommerce (ocultando los atributos de variaciones fuera de stock)

add-attribute-products.php

/**
 * @snippet       Añadir atributos de producto en las paginas woocommerce (ocultando los atributos de variaciones fuera de stock)
 * @author        https://fsxperts.com/how-to-show-product-attributes-on-category-page/
 * @author        https://stackoverflow.com/questions/30855309/how-to-check-product-have-variation-in-woocommerce
 */
add_action('woocommerce_after_shop_loop_item_title','mostrar_atributos_disponibles');

/**
 * @snippet       // Add product attributes in summary (single product page). Entre el precio y descripcion corta
 * @author        https://stackoverflow.com/questions/13374883/get-custom-product-attributes-in-woocommerce
 */
add_action( 'woocommerce_single_product_summary', 'mostrar_atributos_disponibles', 15 ); 


function mostrar_atributos_disponibles() 
{
    global $product;
    
    $product_attributes = array( 'pa_color', 'pa_medida', 'pa_peso', 'pa_origen' );
    $attr_output = array();

    //Mostrar los tallos por paquete
    $tallos  = $product->get_meta( '_qty_args' );
    
    if ( !empty( $tallos ) && isset( $tallos['qty_min']) && $product->get_id() != 5297 )   
    {
        echo '<div class="product-attributes"><strong>Tallos por paquete: </strong>'. $tallos['qty_min'] .'</div>';
    }     
    // variable products
    // special product id 5297: Cajas de rosas completas
    if ( $product->is_type('variable')  && $product->get_id() != 5297 ) 
    {    
        // Medidas
        $taxonomy = 'pa_medida';
        $medidas_array = [];
        // Loop through available variation Ids for the variable product
        foreach( $product->get_children() as $child_id ) 
        {
            $variation = wc_get_product( $child_id ); // Get the WC_Product_Variation object
            
            if( $variation->is_purchasable() && $variation->is_in_stock() ) 
            {
                $term_name = $variation->get_attribute( $taxonomy );
                $medidas_array[$term_name] = $term_name;
            }
        }
        
        if( !empty( $medidas_array[$term_name] ) ) 
        {        
            echo '<span class="attribute-size"><strong>Medidas</strong>: ' . implode( ', ', $medidas_array ) . '</span>';
        }
        //Colores
        $taxonomy = 'pa_color';
        if( taxonomy_exists($taxonomy) ) 
        {
            $label_name = get_taxonomy( $taxonomy )->labels->singular_name;
            $value = $product->get_attribute($taxonomy);
            
            if( !empty($value) )
            {
                // Storing attributes for output
                $attr_output[] = '<span class="'.$taxonomy.'"><strong>'.$label_name.'</strong>: '.$value.'</span>';
            }
        }
        
        //Origen
        $taxonomy = 'pa_origen';
        if( taxonomy_exists($taxonomy) ) 
        {
            $label_name = get_taxonomy( $taxonomy )->labels->singular_name;
            $value = $product->get_attribute($taxonomy);    
            //Si el producto no tiene medida asignada no muestra nada
            if( !empty($value) ) 
            {
                // Storing attributes for output
                $attr_output[] = '<span class="'.$taxonomy.'"><strong>'.$label_name.'</strong>: '.$value.'</span>';
            }
        }
    }
    else 
    {
        // Loop through the array of simple product attributes
        foreach( $product_attributes as $attribute ) 
        {
            if( taxonomy_exists( $attribute ) ) 
            {
                $label_name = get_taxonomy( $attribute )->labels->singular_name;
                $value = $product->get_attribute($attribute);
                
                if( !empty($value) )
                {
                    // Storing attributes for output
                    $attr_output[] = '<span class="'.$attribute.'"><strong>'.$label_name.'</strong>: '.$value.'</span>';
                }
            }
        }
    }

    //Caso especial de productos variables preservados. para mostrar la medida
    if( $product->is_type('variable') && has_term( 'preservadas', 'product_cat' ) )
    {
        // Loop through the array of simple product attributes
        if( taxonomy_exists( 'pa_medida' ) ) 
        {
            $label_name = get_taxonomy( 'pa_medida' )->labels->singular_name;
            $value = $product->get_attribute( 'pa_medida' );
            
            if( !empty( $value ) ) 
            {
                // Storing attributes for output
                $attr_output[] = '<span class="pa_medida"><strong>'.$label_name.'</strong>: '.$value.'</span>';
            }
        }
    }
    
    // Output attribute name / value pairs separate by a "<br>"
    echo '<div class="product-attributes">'.implode( '<br>', $attr_output ).'</div>';
}