WooCommerce 根据自定义字段中的静态日期自动定期更改简单和可变产品的价格

Question

我的问题基于另一个问题“Set Product sale price conditionally based on custom fields in Woocommerce”的答案（LoicTheAztec 和 Xandl）中提供的代码。虽然基础代码是基于该问题的答案，但我对其进行了进一步开发以满足稍微复杂的要求。

问题：如何根据自定义字段中的静态日期自动定期更改简单和可变产品的价格？

给出更多的解释；我正在尝试根据在自定义字段“wooct_time_start”中输入的静态日期创建自动降价到 WooCommerce 产品的正常价格。

下面的代码 sn-p 适用于简单的产品，当前设置为将价格更改为“wooct_time_start”日期/时间之前的“$remaining_days”数，但我似乎无法获得代码的后半部分使用可变产品，这就是我需要帮助的地方？

add_filter('woocommerce_product_get_price', 'conditional_product_sale_price', 20, 6);
add_filter('woocommerce_product_get_sale_price', 'conditional_product_sale_price', 20, 6);
add_filter('woocommerce_product_variation_get_price', 'conditional_product_sale_price', 20, 6);
add_filter('woocommerce_product_variation_get_sale_price', 'conditional_product_sale_price', 20, 6);
add_filter('woocommerce_variation_prices_price', 'conditional_product_sale_price', 20, 6);
add_filter('woocommerce_variation_prices_sale_price', 'conditional_product_sale_price', 20, 6);

function conditional_product_sale_price($price, $product){
    
    if($product->is_type('simple')){

        $date = get_post_meta($product->get_id(), 'wooct_time_start', true);

        if(!empty($date)){
            $date_time = (int) strtotime($date);
            $now_time = (int) strtotime("now");
            $remaining_days = floor(($date_time - $now_time) / 86400);
    
            if($remaining_days <= 30){
                $price = $remaining_days;
            }elseif($remaining_days >= 31 && $remaining_days <= 60){
                $price = $remaining_days;
            }elseif($remaining_days >= 61 && $remaining_days <= 90){
                $price = $remaining_days;
            }elseif($remaining_days >= 91 && $remaining_days <= 120){
                $price = $remaining_days;
            }elseif($remaining_days >= 121 && $remaining_days <= 150){
                $price = $remaining_days;
            }elseif($remaining_days > 150){
                $price = $remaining_days;
            }
        }
        
        return $price;
            
    }if($product->is_type('variable')){

            $children_ids = $product->get_children();
            $date = get_post_meta($product->get_id(), 'wooct_time_start', true);
            
            foreach( $children_ids as $child_id ){

                $variation = wc_get_product($child_id);
                $var_price = $variation->get_price();
                
                if(!empty($date)){
                    $date_time = (int) strtotime($date);
                    $now_time = (int) strtotime("now");
                    $remaining_days = floor(($date_time - $now_time) / 86400);
                    
                    if($remaining_days <= 30){
                        $var_price = $remaining_days;
                    }elseif($remaining_days >= 31 && $remaining_days <= 60){
                        $var_price = $remaining_days;
                    }elseif($remaining_days >= 61 && $remaining_days <= 90){
                        $var_price = $remaining_days;
                    }elseif($remaining_days >= 91 && $remaining_days <= 120){
                        $var_price = $remaining_days;
                    }elseif($remaining_days >= 121 && $remaining_days <= 150){
                        $var_price = $remaining_days;
                    }elseif($remaining_days > 150){
                        $var_price = $remaining_days;
                    }
                }
                
                return $price;
                
            }
    }   
}

我尝试了对代码的各种迭代，但没有成功：

• 更改行的位置$date = get_post_meta($product->get_id(), 'wooct_time_start', true);
• 将行 $var_price = $variation->get_price(); 更改为 $var_price = $product->get_price();
• 由于存储了瞬态，我已经使用了与 woocommerce_get_variation_prices_hash 相关的代码，但我仍然不知道它与我的代码有什么直接关系，尽管在线研究了几个小时。

更新：

我已经能够使用文章“Change product prices via a hook in WooCommerce 3+”中提供的答案创建以下更新代码。

这个新代码还有一个问题 - 它似乎没有成功更新任何“变体”的价格。但是，它适用于“简单”和“可变”产品！

如果有人能够让这个新代码也与“变体”一起使用，那么这将回答这个问题。

function product_life_cycle_main_function($price, $product){

        $date = get_post_meta($product->get_id(), 'wooct_time_start', true);

        if(!empty($date)){
            $date_time = (int) strtotime($date);
            $now_time = (int) strtotime("now");
            $remaining_days = floor(($date_time - $now_time) / 86400);
    
            if($remaining_days <= 30){
                $price = $remaining_days;
            }elseif($remaining_days >= 31 && $remaining_days <= 60){
                $price = $remaining_days;
            }elseif($remaining_days >= 61 && $remaining_days <= 90){
                $price = $remaining_days;
            }elseif($remaining_days >= 91 && $remaining_days <= 120){
                $price = $remaining_days;
            }elseif($remaining_days >= 121 && $remaining_days <= 150){
                $price = $remaining_days;
            }elseif($remaining_days > 150){
                $price = $remaining_days;
            }
        }
        return $price;
}

add_filter('woocommerce_product_get_price', 'product_life_cycle_custom_price', 99, 2);
add_filter('woocommerce_product_get_regular_price', 'product_life_cycle_custom_price', 99, 2);
add_filter('woocommerce_product_variation_get_regular_price', 'product_life_cycle_custom_price', 99, 2);
add_filter('woocommerce_product_variation_get_price', 'product_life_cycle_custom_price', 99, 2);
    function product_life_cycle_custom_price($price, $product) {
        return product_life_cycle_main_function($price, $product);
    }

add_filter('woocommerce_variation_prices_price', 'product_life_cycle_custom_variable_price', 99, 3);
add_filter('woocommerce_variation_prices_regular_price', 'product_life_cycle_custom_variable_price', 99, 3);
    function product_life_cycle_custom_variable_price($price, $variation, $product) {
        wc_delete_product_transients($variation->get_id());
        return product_life_cycle_main_function($price, $product);
    }

add_filter('woocommerce_get_variation_prices_hash', 'product_life_cycle_variation_prices_hash', 99, 3);
    function product_life_cycle_variation_prices_hash($price_hash, $product, $for_display) {
        $price_hash[] = product_life_cycle_main_function($price, $product);
        return $price_hash;
    }

Answer 1

我建议重写获取数据的逻辑，使其更加健壮。如果产品不是简单的、可变的或变化的，则接受的答案中描述的检查失败，但可以使其更通用。以下是如何做到这一点的示例：

function product_life_cycle_main_function($price, $product){
    // Determine the product ID to use
    // - Parent product ID for variations
    // - Product ID for all other products
    $meta_product_id = $product->is_type('variation') ? $product->get_parent_id() : $product->get_id();

    // The above can also be simplified as follows:
    // - If the product has a parent, take the meta from the parent
    // - If the product doesn't have a parent, take the meta from the product
    //
    // This check would also work with other product types, such as bundled products, subscriptions, etc
    //$meta_product_id = ($product->get_parent_id() > 0) ? $product->get_parent_id() : $product->get_id();

    $date = get_post_meta($meta_product_id, 'wooct_time_start', true);

    // Rest of the code...

    return $price;
}

Answer 2

使用Diego 提供的建议，我能够添加以下内容以使代码正常工作：

function product_life_cycle_main_function($price, $product){
    
    $product_id = ($product->get_parent_id() > 0) ? $product->get_parent_id() : $product->get_id();
    
    $date = get_post_meta($product_id, 'wooct_time_start', true);

        if(!empty($date)){
            $date_time = (int) strtotime($date);
            $now_time = (int) strtotime("now");
            $remaining_days = floor(($date_time - $now_time) / 86400);
    
            if($remaining_days <= 30){
                $price = $remaining_days;
            }elseif($remaining_days >= 31 && $remaining_days <= 60){
                $price = $remaining_days;
            }elseif($remaining_days >= 61 && $remaining_days <= 90){
                $price = $remaining_days;
            }elseif($remaining_days >= 91 && $remaining_days <= 120){
                $price = $remaining_days;
            }elseif($remaining_days >= 121 && $remaining_days <= 150){
                $price = $remaining_days;
            }elseif($remaining_days > 150){
                $price = $remaining_days;
            }
        }
        
        return $price;
        
}

add_filter('woocommerce_product_get_price', 'product_life_cycle_custom_price', 99, 2);
add_filter('woocommerce_product_get_regular_price', 'product_life_cycle_custom_price', 99, 2);
add_filter('woocommerce_product_variation_get_regular_price', 'product_life_cycle_custom_price', 99, 2);
add_filter('woocommerce_product_variation_get_price', 'product_life_cycle_custom_price', 99, 2);
    function product_life_cycle_custom_price($price, $product) {
        return product_life_cycle_main_function($price, $product);
    }

add_filter('woocommerce_variation_prices_price', 'product_life_cycle_custom_variable_price', 99, 3);
add_filter('woocommerce_variation_prices_regular_price', 'product_life_cycle_custom_variable_price', 99, 3);
    function product_life_cycle_custom_variable_price($price, $variation, $product) {
        wc_delete_product_transients($variation->get_id());
        return product_life_cycle_main_function($price, $product);
    }

add_filter('woocommerce_get_variation_prices_hash', 'product_life_cycle_variation_prices_hash', 99, 3);
    function product_life_cycle_variation_prices_hash($price_hash, $product, $for_display) {
        global $price;
        $price_hash[] = product_life_cycle_main_function($price, $product);
        return $price_hash;
    }