WordPress文创产品柔性定价插件开发指南

引言：文创产品的定价挑战

在文创产品销售领域，定价策略往往比普通商品更加复杂。一件手工艺品、数字艺术品或文创衍生品的价值不仅取决于成本，还受到设计独特性、创作者知名度、限量程度、市场需求等多种因素影响。传统的固定定价模式难以适应这种多样性，因此开发一个能够实现柔性定价的WordPress插件变得尤为重要。

本文将详细介绍如何开发一个功能完整的WordPress文创产品柔性定价插件，帮助文创创作者和商家根据多种因素动态调整产品价格。

插件架构设计

1.1 插件基础结构

首先，我们创建插件的基本文件结构：

wp-content/plugins/flexible-pricing/
├── flexible-pricing.php          # 主插件文件
├── includes/
│   ├── class-price-calculator.php # 价格计算核心类
│   ├── class-admin-settings.php   # 后台设置类
│   └── class-frontend-display.php # 前端显示类
├── assets/
│   ├── css/
│   │   └── admin-style.css       # 后台样式
│   └── js/
│       └── frontend-script.js    # 前端脚本
└── templates/
    └── price-display.php         # 价格显示模板

1.2 主插件文件

<?php
/**
 * Plugin Name: 文创产品柔性定价
 * Plugin URI:  https://example.com/flexible-pricing
 * Description: 为WordPress文创产品提供灵活的定价解决方案
 * Version:     1.0.0
 * Author:      文创开发者
 * License:     GPL v2 or later
 * Text Domain: flexible-pricing
 */

// 防止直接访问
if (!defined('ABSPATH')) {
    exit;
}

// 定义插件常量
define('FLEXIBLE_PRICING_VERSION', '1.0.0');
define('FLEXIBLE_PRICING_PLUGIN_DIR', plugin_dir_path(__FILE__));
define('FLEXIBLE_PRICING_PLUGIN_URL', plugin_dir_url(__FILE__));

// 自动加载类文件
spl_autoload_register(function ($class) {
    $prefix = 'FlexiblePricing\';
    $base_dir = FLEXIBLE_PRICING_PLUGIN_DIR . 'includes/';
    
    $len = strlen($prefix);
    if (strncmp($prefix, $class, $len) !== 0) {
        return;
    }
    
    $relative_class = substr($class, $len);
    $file = $base_dir . str_replace('\', '/', $relative_class) . '.php';
    
    if (file_exists($file)) {
        require $file;
    }
});

// 初始化插件
add_action('plugins_loaded', 'flexible_pricing_init');

function flexible_pricing_init() {
    // 检查WooCommerce是否激活（如果依赖WooCommerce）
    if (!class_exists('WooCommerce')) {
        add_action('admin_notices', function() {
            echo '<div class="notice notice-error"><p>';
            echo __('文创产品柔性定价插件需要WooCommerce支持。', 'flexible-pricing');
            echo '</p></div>';
        });
        return;
    }
    
    // 初始化核心类
    $price_calculator = new FlexiblePricingPriceCalculator();
    $admin_settings = new FlexiblePricingAdminSettings();
    $frontend_display = new FlexiblePricingFrontendDisplay();
    
    // 注册激活和停用钩子
    register_activation_hook(__FILE__, 'flexible_pricing_activate');
    register_deactivation_hook(__FILE__, 'flexible_pricing_deactivate');
}

function flexible_pricing_activate() {
    // 创建必要的数据库表
    global $wpdb;
    $charset_collate = $wpdb->get_charset_collate();
    $table_name = $wpdb->prefix . 'flexible_pricing_rules';
    
    $sql = "CREATE TABLE IF NOT EXISTS $table_name (
        id mediumint(9) NOT NULL AUTO_INCREMENT,
        product_id bigint(20) NOT NULL,
        rule_type varchar(50) NOT NULL,
        rule_condition text NOT NULL,
        adjustment_type varchar(20) NOT NULL,
        adjustment_value decimal(10,2) NOT NULL,
        priority int(11) DEFAULT 0,
        is_active tinyint(1) DEFAULT 1,
        created_at datetime DEFAULT CURRENT_TIMESTAMP,
        PRIMARY KEY (id),
        KEY product_id (product_id)
    ) $charset_collate;";
    
    require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
    dbDelta($sql);
    
    // 添加默认选项
    add_option('flexible_pricing_version', FLEXIBLE_PRICING_VERSION);
}

function flexible_pricing_deactivate() {
    // 清理临时数据
    wp_clear_scheduled_hook('flexible_pricing_daily_tasks');
}

价格计算引擎开发

2.1 价格计算核心类

<?php
namespace FlexiblePricing;

/**
 * 价格计算引擎
 * 处理所有定价规则和计算逻辑
 */
class PriceCalculator {
    
    private $rules = [];
    
    public function __construct() {
        add_filter('woocommerce_product_get_price', [$this, 'calculate_flexible_price'], 10, 2);
        add_filter('woocommerce_product_variation_get_price', [$this, 'calculate_flexible_price'], 10, 2);
    }
    
    /**
     * 计算柔性价格
     * @param float $price 原始价格
     * @param WC_Product $product 产品对象
     * @return float 计算后的价格
     */
    public function calculate_flexible_price($price, $product) {
        // 获取产品ID
        $product_id = $product->get_id();
        
        // 获取适用的定价规则
        $rules = $this->get_applicable_rules($product_id);
        
        // 如果没有规则，返回原价
        if (empty($rules)) {
            return $price;
        }
        
        // 按优先级排序
        usort($rules, function($a, $b) {
            return $b['priority'] - $a['priority'];
        });
        
        // 应用规则
        $final_price = $price;
        foreach ($rules as $rule) {
            if ($this->check_rule_condition($rule, $product)) {
                $final_price = $this->apply_price_adjustment($final_price, $rule);
            }
        }
        
        return max(0, $final_price); // 确保价格不为负
    }
    
    /**
     * 获取适用的定价规则
     * @param int $product_id 产品ID
     * @return array 规则数组
     */
    private function get_applicable_rules($product_id) {
        global $wpdb;
        $table_name = $wpdb->prefix . 'flexible_pricing_rules';
        
        $rules = $wpdb->get_results(
            $wpdb->prepare(
                "SELECT * FROM $table_name 
                 WHERE (product_id = %d OR product_id = 0) 
                 AND is_active = 1 
                 ORDER BY priority DESC",
                $product_id
            ),
            ARRAY_A
        );
        
        return $rules;
    }
    
    /**
     * 检查规则条件
     * @param array $rule 规则数据
     * @param WC_Product $product 产品对象
     * @return bool 是否满足条件
     */
    private function check_rule_condition($rule, $product) {
        $condition = json_decode($rule['rule_condition'], true);
        
        if (!$condition) {
            return false;
        }
        
        // 检查用户角色条件
        if (isset($condition['user_role'])) {
            $user = wp_get_current_user();
            if (!in_array($condition['user_role'], $user->roles)) {
                return false;
            }
        }
        
        // 检查购买数量条件
        if (isset($condition['min_quantity'])) {
            $cart = WC()->cart;
            if ($cart) {
                $quantity = $this->get_cart_item_quantity($product->get_id());
                if ($quantity < $condition['min_quantity']) {
                    return false;
                }
            }
        }
        
        // 检查日期范围条件
        if (isset($condition['date_range'])) {
            $current_time = current_time('timestamp');
            $start_time = strtotime($condition['date_range']['start']);
            $end_time = strtotime($condition['date_range']['end']);
            
            if ($current_time < $start_time || $current_time > $end_time) {
                return false;
            }
        }
        
        return true;
    }
    
    /**
     * 应用价格调整
     * @param float $price 当前价格
     * @param array $rule 规则数据
     * @return float 调整后的价格
     */
    private function apply_price_adjustment($price, $rule) {
        $adjustment_type = $rule['adjustment_type'];
        $adjustment_value = floatval($rule['adjustment_value']);
        
        switch ($adjustment_type) {
            case 'fixed_increase':
                return $price + $adjustment_value;
                
            case 'fixed_decrease':
                return $price - $adjustment_value;
                
            case 'percentage_increase':
                return $price * (1 + $adjustment_value / 100);
                
            case 'percentage_decrease':
                return $price * (1 - $adjustment_value / 100);
                
            case 'fixed_price':
                return $adjustment_value;
                
            default:
                return $price;
        }
    }
    
    /**
     * 获取购物车中商品数量
     * @param int $product_id 产品ID
     * @return int 数量
     */
    private function get_cart_item_quantity($product_id) {
        $cart = WC()->cart;
        if (!$cart) {
            return 0;
        }
        
        foreach ($cart->get_cart() as $cart_item) {
            if ($cart_item['product_id'] == $product_id) {
                return $cart_item['quantity'];
            }
        }
        
        return 0;
    }
}

后台管理界面

3.1 定价规则管理

<?php
namespace FlexiblePricing;

/**
 * 后台管理设置
 */
class AdminSettings {
    
    public function __construct() {
        add_action('admin_menu', [$this, 'add_admin_menu']);
        add_action('admin_enqueue_scripts', [$this, 'enqueue_admin_scripts']);
        add_action('add_meta_boxes', [$this, 'add_product_meta_box']);
        add_action('save_post_product', [$this, 'save_product_pricing_rules']);
    }
    
    /**
     * 添加管理菜单
     */
    public function add_admin_menu() {
        add_submenu_page(
            'woocommerce',
            __('柔性定价规则', 'flexible-pricing'),
            __('柔性定价', 'flexible-pricing'),
            'manage_options',
            'flexible-pricing-rules',
            [$this, 'render_rules_page']
        );
    }
    
    /**
     * 渲染规则管理页面
     */
    public function render_rules_page() {
        ?>
        <div class="wrap">
            <h1><?php echo esc_html__('文创产品柔性定价规则', 'flexible-pricing'); ?></h1>
            
            <div id="flexible-pricing-rules-app">
                <!-- Vue.js应用容器 -->
                <div class="card">
                    <h2><?php echo esc_html__('添加新规则', 'flexible-pricing'); ?></h2>
                    
                    <form method="post" action="<?php echo admin_url('admin-post.php'); ?>">
                        <input type="hidden" name="action" value="save_flexible_pricing_rule">
                        <?php wp_nonce_field('save_flexible_pricing_rule'); ?>
                        
                        <table class="form-table">
                            <tr>
                                <th scope="row">
                                    <label for="product_id"><?php echo esc_html__('适用产品', 'flexible-pricing'); ?></label>
                                </th>
                                <td>
                                    <select name="product_id" id="product_id" class="regular-text">
                                        <option value="0"><?php echo esc_html__('所有产品', 'flexible-pricing'); ?></option>
                                        <?php
                                        $products = wc_get_products(['limit' => -1]);
                                        foreach ($products as $product) {
                                            echo '<option value="' . esc_attr($product->get_id()) . '">';
                                            echo esc_html($product->get_name());
                                            echo '</option>';
                                        }
                                        ?>
                                    </select>
                                </td>
                            </tr>
                            
                            <tr>
                                <th scope="row">
                                    <label for="rule_type"><?php echo esc_html__('规则类型', 'flexible-pricing'); ?></label>
                                </th>
                                <td>
                                    <select name="rule_type" id="rule_type" class="regular-text">
                                        <option value="user_role"><?php echo esc_html__('用户角色', 'flexible-pricing'); ?></option>
                                        <option value="quantity"><?php echo esc_html__('购买数量', 'flexible-pricing'); ?></option>
                                        <option value="date_range"><?php echo esc_html__('日期范围', 'flexible-pricing'); ?></option>
                                        <option value="custom"><?php echo esc_html__('自定义条件', 'flexible-pricing'); ?></option>
                                    </select>
                                </td>
                            </tr>
                            
                            <tr>
                                <th scope="row">
                                    <label for="adjustment_type"><?php echo esc_html__('调整类型', 'flexible-pricing'); ?></label>
                                </th>
                                <td>
                                    <select name="adjustment_type" id="adjustment_type" class="regular-text">
                                        <option value="percentage_increase"><?php echo esc_html__('百分比增加', 'flexible-pricing'); ?></option>
                                        <option value="percentage_decrease"><?php echo esc_html__('百分比减少', 'flexible-pricing'); ?></option>
                                        <option value="fixed_increase"><?php echo esc_html__('固定金额增加', 'flexible-pricing'); ?></option>
                                        <option value="fixed_decrease"><?php echo esc_html__('固定金额减少', 'flexible-pricing'); ?></option>
                                        <option value="fixed_price"><?php echo esc_html__('固定价格', 'flexible-pricing'); ?></option>
                                    </select>
                                </td>
                            </tr>
                            
                            <tr>
                                <th scope="row">
                                    <label for="adjustment_value"><?php echo esc_html__('调整值', 'flexible-pricing'); ?></label>
                                </th>
                                <td>
                                    <input type="number" 
                                           name="adjustment_value" 
                                           id="adjustment_value" 
                                           step="0.01" 
                                           class="regular-text"
                                           required>
                                </td>
                            </tr>
                            
                            <tr>
                                <th scope="row">
                                    <label for="priority"><?php echo esc_html__('优先级', 'flexible-pricing'); ?></label>
                                </th>
                                <td>
                                    <input type="number" 
                                           name="priority" 
                                           id="priority" 
                                           value="0" 
                                           class="small-text">
                                    <p class="description"><?php echo esc_html__('数字越大优先级越高', 'flexible-pricing'); ?></p>
                                </td>
                            </tr>
                        </table>
                        
                        <?php submit_button(__('保存规则', 'flexible-pricing')); ?>
                    </form>
                </div>
                
                <!-- 现有规则列表 -->
                <div class="card">
                    <h2><?php echo esc_html__('现有定价规则', 'flexible-pricing'); ?></h2>
                    <?php $this->render_rules_table(); ?>
                </div>
            </div>
        </div>
        <?php
    }
    
    /**
     * 渲染规则表格
     */
    private function render_rules_table() {
        global $wpdb;
        $table_name = $wpdb->prefix . 'flexible_pricing_rules';
        $rules = $wpdb->get_results("SELECT * FROM $table_name ORDER BY priority DESC, id DESC");
        
        if (empty($rules)) {
            echo '<p>' . esc_html__('暂无定价规则。', 'flexible-pricing') . '</p>';
            return;
        }
        
        echo '<table class="wp-list-table widefat fixed striped">';
        echo '<thead>';
        echo '<tr>';
        echo '<th>' . esc_html__('ID', 'flexible-pricing') . '</th>';
        echo '<th>' . esc_html__('产品', 'flexible-pricing') . '</th>';
        echo '<th>' . esc_html__('规则类型', 'flexible-pricing') . '</th>';
        echo '<th>' . esc_html__('调整方式', 'flexible-pricing') . '</th>';
        echo '<th>' . esc_html__('调整值', 'flexible-pricing') . '</th>';
        echo '<th>' . esc_html__('优先级', 'flexible-pricing') . '</th>';
        echo '<th>' . esc_html__('操作', 'flexible-pricing') . '</th>';
        echo '</tr>';
        echo '</thead>';
        echo '<tbody>';
        
        foreach ($rules as $rule) {
            $product_name = $rule->product_id == 0 
                ? __('所有产品', 'flexible-pricing') 
                : get_the_title($rule->product_id);
            
            echo '<tr>';
            echo '<td>' . esc_html($rule->id) . '</td>';
            echo '<td>' . esc_html($product_name) . '</td>';
            echo '<td>' . esc_html($this->get_rule_type_label($rule->rule_type)) . '</td>';
            echo '<td>' . esc_html($this->get_adjustment_type_label($rule->adjustment_type)) . '</td>';
            echo '<td>' . esc_html($rule->adjustment_value) . '</td>';
            echo '<td>' . esc_html($rule->priority) . '</td>';
            echo '<td>';
            echo '<a href="' . esc_url(wp_nonce_url(
                admin_url('admin-post.php?action=delete_flexible_pricing_rule&rule_id=' . $rule->id),
                'delete_flexible_pricing_rule'

        )) . '" class="button button-small" onclick="return confirm('' . esc_js(__('确定要删除此规则吗？', 'flexible-pricing')) . '')">' . __('删除', 'flexible-pricing') . '</a>';
        echo '</td>';
        echo '</tr>';
    }
    
    echo '</tbody>';
    echo '</table>';
}

/**
 * 获取规则类型标签
 */
private function get_rule_type_label($type) {
    $labels = [
        'user_role' => __('用户角色', 'flexible-pricing'),
        'quantity' => __('购买数量', 'flexible-pricing'),
        'date_range' => __('日期范围', 'flexible-pricing'),
        'custom' => __('自定义', 'flexible-pricing')
    ];
    
    return $labels[$type] ?? $type;
}

/**
 * 获取调整类型标签
 */
private function get_adjustment_type_label($type) {
    $labels = [
        'percentage_increase' => __('百分比增加', 'flexible-pricing'),
        'percentage_decrease' => __('百分比减少', 'flexible-pricing'),
        'fixed_increase' => __('固定增加', 'flexible-pricing'),
        'fixed_decrease' => __('固定减少', 'flexible-pricing'),
        'fixed_price' => __('固定价格', 'flexible-pricing')
    ];
    
    return $labels[$type] ?? $type;
}

/**
 * 添加产品编辑页面的定价规则元框
 */
public function add_product_meta_box() {
    add_meta_box(
        'flexible_pricing_rules',
        __('柔性定价规则', 'flexible-pricing'),
        [$this, 'render_product_pricing_meta_box'],
        'product',
        'side',
        'high'
    );
}

/**
 * 渲染产品定价规则元框
 */
public function render_product_pricing_meta_box($post) {
    $product_id = $post->ID;
    $rules = $this->get_product_rules($product_id);
    
    echo '<div class="flexible-pricing-product-rules">';
    
    if (empty($rules)) {
        echo '<p>' . __('暂无特定定价规则。', 'flexible-pricing') . '</p>';
    } else {
        echo '<ul>';
        foreach ($rules as $rule) {
            echo '<li>' . esc_html($this->format_rule_description($rule)) . '</li>';
        }
        echo '</ul>';
    }
    
    echo '<p>';
    echo '<a href="' . admin_url('admin.php?page=flexible-pricing-rules&product_id=' . $product_id) . '" class="button">';
    echo __('管理定价规则', 'flexible-pricing');
    echo '</a>';
    echo '</p>';
    
    echo '</div>';
}

/**
 * 保存产品定价规则
 */
public function save_product_pricing_rules($post_id) {
    if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) {
        return;
    }
    
    if (!current_user_can('edit_product', $post_id)) {
        return;
    }
    
    // 这里可以添加保存产品特定规则的逻辑
}

/**
 * 获取产品规则
 */
private function get_product_rules($product_id) {
    global $wpdb;
    $table_name = $wpdb->prefix . 'flexible_pricing_rules';
    
    return $wpdb->get_results(
        $wpdb->prepare(
            "SELECT * FROM $table_name WHERE product_id = %d AND is_active = 1",
            $product_id
        )
    );
}

/**
 * 格式化规则描述
 */
private function format_rule_description($rule) {
    $condition = json_decode($rule->rule_condition, true);
    $description = '';
    
    switch ($rule->rule_type) {
        case 'user_role':
            $description = sprintf(
                __('用户角色: %s', 'flexible-pricing'),
                $condition['user_role'] ?? ''
            );
            break;
        case 'quantity':
            $description = sprintf(
                __('购买数量 ≥ %d', 'flexible-pricing'),
                $condition['min_quantity'] ?? 0
            );
            break;
        case 'date_range':
            $description = sprintf(
                __('日期范围: %s 至 %s', 'flexible-pricing'),
                $condition['date_range']['start'] ?? '',
                $condition['date_range']['end'] ?? ''
            );
            break;
    }
    
    $adjustment = $this->format_adjustment_description($rule);
    return $description . ' → ' . $adjustment;
}

/**
 * 格式化调整描述
 */
private function format_adjustment_description($rule) {
    switch ($rule->adjustment_type) {
        case 'percentage_increase':
            return sprintf(__('价格增加 %s%%', 'flexible-pricing'), $rule->adjustment_value);
        case 'percentage_decrease':
            return sprintf(__('价格减少 %s%%', 'flexible-pricing'), $rule->adjustment_value);
        case 'fixed_increase':
            return sprintf(__('价格增加 %s元', 'flexible-pricing'), $rule->adjustment_value);
        case 'fixed_decrease':
            return sprintf(__('价格减少 %s元', 'flexible-pricing'), $rule->adjustment_value);
        case 'fixed_price':
            return sprintf(__('固定价格 %s元', 'flexible-pricing'), $rule->adjustment_value);
        default:
            return $rule->adjustment_type;
    }
}

/**
 * 加载后台脚本和样式
 */
public function enqueue_admin_scripts($hook) {
    if ($hook === 'woocommerce_page_flexible-pricing-rules' || $hook === 'post.php') {
        wp_enqueue_style(
            'flexible-pricing-admin',
            FLEXIBLE_PRICING_PLUGIN_URL . 'assets/css/admin-style.css',
            [],
            FLEXIBLE_PRICING_VERSION
        );
        
        wp_enqueue_script(
            'flexible-pricing-admin',
            FLEXIBLE_PRICING_PLUGIN_URL . 'assets/js/admin-script.js',
            ['jquery', 'jquery-ui-datepicker'],
            FLEXIBLE_PRICING_VERSION,
            true
        );
        
        wp_localize_script('flexible-pricing-admin', 'flexiblePricingAdmin', [
            'ajax_url' => admin_url('admin-ajax.php'),
            'nonce' => wp_create_nonce('flexible_pricing_admin_nonce'),
            'i18n' => [
                'confirm_delete' => __('确定要删除此规则吗？', 'flexible-pricing'),
                'saving' => __('保存中...', 'flexible-pricing'),
                'saved' => __('保存成功！', 'flexible-pricing')
            ]
        ]);
    }
}

}

## 前端价格显示与交互

### 4.1 前端显示类

<?php
namespace FlexiblePricing;

/**

• 前端显示处理
  */

class FrontendDisplay {

public function __construct() {
    add_action('woocommerce_before_add_to_cart_button', [$this, 'display_price_calculator']);
    add_action('wp_enqueue_scripts', [$this, 'enqueue_frontend_scripts']);
    add_action('wp_ajax_calculate_dynamic_price', [$this, 'ajax_calculate_dynamic_price']);
    add_action('wp_ajax_nopriv_calculate_dynamic_price', [$this, 'ajax_calculate_dynamic_price']);
    add_filter('woocommerce_get_price_html', [$this, 'display_dynamic_price_range'], 10, 2);
}

/**
 * 显示价格计算器
 */
public function display_price_calculator() {
    global $product;
    
    if (!$product || !$product->is_type('simple')) {
        return;
    }
    
    // 获取产品的基础价格
    $base_price = $product->get_price();
    $product_id = $product->get_id();
    
    // 获取可用的定价规则
    $rules = $this->get_available_rules_for_display($product_id);
    
    if (empty($rules)) {
        return;
    }
    
    // 加载模板
    include FLEXIBLE_PRICING_PLUGIN_DIR . 'templates/price-display.php';
}

/**
 * 获取用于显示的规则
 */
private function get_available_rules_for_display($product_id) {
    global $wpdb;
    $table_name = $wpdb->prefix . 'flexible_pricing_rules';
    
    $rules = $wpdb->get_results(
        $wpdb->prepare(
            "SELECT * FROM $table_name 
             WHERE (product_id = %d OR product_id = 0) 
             AND is_active = 1 
             AND rule_type IN ('quantity', 'user_role')
             ORDER BY priority DESC",
            $product_id
        ),
        ARRAY_A
    );
    
    return $rules;
}

/**
 * 显示动态价格范围
 */
public function display_dynamic_price_range($price_html, $product) {
    if (is_admin() || !$product->is_type('simple')) {
        return $price_html;
    }
    
    $product_id = $product->get_id();
    $base_price = $product->get_price();
    
    // 获取可能的最低价格
    $min_price = $this->calculate_minimum_possible_price($product_id, $base_price);
    
    if ($min_price < $base_price) {
        $price_html = sprintf(
            '<span class="price"><del>%s</del> <ins>%s起</ins></span>',
            wc_price($base_price),
            wc_price($min_price)
        );
    }
    
    return $price_html;
}

/**
 * 计算最低可能价格
 */
private function calculate_minimum_possible_price($product_id, $base_price) {
    global $wpdb;
    $table_name = $wpdb->prefix . 'flexible_pricing_rules';
    
    // 获取所有降价规则
    $rules = $wpdb->get_results(
        $wpdb->prepare(
            "SELECT * FROM $table_name 
             WHERE (product_id = %d OR product_id = 0) 
             AND is_active = 1 
             AND adjustment_type IN ('percentage_decrease', 'fixed_decrease', 'fixed_price')
             ORDER BY priority DESC",
            $product_id
        )
    );
    
    $min_price = $base_price;
    
    foreach ($rules as $rule) {
        $price_calculator = new PriceCalculator();
        $adjusted_price = $price_calculator->apply_price_adjustment($min_price, (array)$rule);
        $min_price = min($min_price, $adjusted_price);
    }
    
    return $min_price;
}

/**
 * AJAX计算动态价格
 */
public function ajax_calculate_dynamic_price() {
    check_ajax_referer('flexible_pricing_nonce', 'nonce');
    
    $product_id = intval($_POST['product_id']);
    $quantity = intval($_POST['quantity']);
    $user_id = get_current_user_id();
    
    // 获取产品
    $product = wc_get_product($product_id);
    if (!$product) {
        wp_send_json_error(['message' => __('产品不存在', 'flexible-pricing')]);
    }
    
    // 模拟购物车数量
    if ($quantity > 0) {
        WC()->cart = new WC_Cart();
        WC()->cart->add_to_cart($product_id, $quantity);
    }
    
    // 计算价格
    $price_calculator = new PriceCalculator();
    $final_price = $price_calculator->calculate_flexible_price(
        $product->get_price(),
        $product
    );
    
    // 清理模拟的购物车
    if ($quantity > 0) {
        WC()->cart->empty_cart();
    }
    
    wp_send_json_success([
        'price' => $final_price,
        'price_display' => wc_price($final_price),
        'savings' => $product->get_price() - $final_price,
        'savings_display' => wc_price($product->get_price() - $final_price)
    ]);
}

/**
 * 加载前端脚本
 */
public function enqueue_frontend_scripts() {
    if (!is_product()) {
        return;
    }
    
    wp_enqueue_script(
        'flexible-pricing-frontend',
        FLEXIBLE_PRICING_PLUGIN_URL . 'assets/js/frontend-script.js',
        ['jquery'],
        FLEXIBLE_PRICING_VERSION,
        true
    );
    
    wp_localize_script('flexible-pricing-frontend', 'flexiblePricing', [
        'ajax_url' => admin_url('admin-ajax.php'),
        'nonce' => wp_create_nonce('flexible_pricing_nonce'),
        'i18n' => [
            'calculating' => __('计算中...', 'flexible-pricing'),
            'quantity' => __('数量', 'flexible-pricing'),
            'final_price' => __('最终价格', 'flexible-pricing'),
            'you_save' => __('您节省了', 'flexible-pricing')
        ]
    ]);
    
    wp_enqueue_style(
        'flexible-pricing-frontend',
        FLEXIBLE_PRICING_PLUGIN_URL . 'assets/css/frontend-style.css',
        [],
        FLEXIBLE_PRICING_VERSION
    );
}

}

### 4.2 前端价格显示模板

<?php
/**

• 价格显示模板文件
• 路径: templates/price-display.php
  */

?>
<div class="flexible-pricing-calculator" data-product-id="<?php echo esc_attr($product_id); ?>">

<h3><?php _e('价格计算器', 'flexible-pricing'); ?></h3>

<div class="pricing-options">
    <?php if (is_user_logged_in()): ?>
        <?php 
        $user = wp_get_current_user();
        $user_roles = $user->roles;
        ?>
        <div class="user-role-info">
            <p><?php printf(__('当前用户角色: %s', 'flexible-pricing'), implode(', ', $user_roles)); ?></p>
        </div>
    <?php endif; ?>
    
    <div class="quantity-selector">
        <label for="quantity"><?php _e('购买数量:', 'flexible-pricing'); ?></label>
        <input type="number" 
               id="flexible-pricing-quantity" 
               name="quantity" 
               value="1" 
               min="1" 
               max="99"
               class="input-text qty text">
        <button type="button" class="button calculate-price">
            <?php _e('计算价格', 'flexible-pricing'); ?>
        </button>
    </div>
    
    <?php if (!empty($rules)): ?>
    <div class="pricing-rules-info">
        <h4><?php _e('可用定价规则:', 'flexible-pricing'); ?></h4>
        <ul>
            <?php 
            $price_calculator = new FlexiblePricingPriceCalculator();
            foreach ($rules as $rule): 
                if ($price_calculator->check_rule_condition($rule, $product)):
            ?>
            <li>
                <?php 
                $condition = json_decode($rule['rule_condition'], true);
                switch ($rule['rule_type']) {
                    case 'quantity':
                        printf(__('购买 %d 件以上可享受优惠', 'flexible-pricing'), 
                               $condition['min_quantity'] ?? 0);
                        break;
                    case 'user_role':
                        printf(__('%s 会员专享价', 'flexible-pricing'), 
                               $condition['user_role'] ?? '');
                        break;
                }
                ?>
            </li>
            <?php 
                endif;
            endforeach; 
            ?>
        </ul>
    </div>
    <?php endif; ?>
    
    <div class="price-result" style="display: none;">
        <div class="final-price">
            <strong><?php _e('最终价格:', 'flexible-pricing'); ?></strong>
            <span class="price-amount"></span>
        </div>
        <div class="price-savings">
            <strong><?php _e('节省金额:', 'flexible-pricing'); ?></strong>
            <span class="savings-amount"></span>
        </div>
    </div>
</div>

</div>

## 高级功能扩展

### 5.1 批量定价规则导入

<?php
/**

• 批量定价规则导入类
• 扩展功能：支持从CSV文件导入定价规则
  */

namespace FlexiblePricingExtensions;

class BulkImport {

public function __construct() {
    add_action('admin_menu', [$this, 'add_import_page']);
    add_action('admin_post_import_pricing_rules', [$this, 'handle_import']);
}

/**
 * 添加导入页面
 */
public function add_import_page() {
    add_submenu_page(
        'woocommerce',
        __('批量导入定价规则', 'flexible-pricing'),
        __('批量导入', 'flexible-pricing'),
        'manage_options',
        'flexible-pricing-import',
        [$this, 'render_import_page']
    );
}

/**
 * 渲染导入页面
 */
public function render_import_page() {
    ?>
    <div class="wrap">
        <h1><?php _e('批量导入定价规则', 'flexible-pricing'); ?></h1>
        
        <div class="card">
            <h2><?php _e('导入说明', 'flexible-pricing'); ?></h2>
            <p><?php _e('请上传CSV文件，文件格式如下：', 'flexible-pricing'); ?></p>
            
            <table class="widefat">
                <thead>
                    <tr>
                        <th>product_id</th>
                        <th>rule_type</th>
                        <th>rule_condition</th>
                        <th>adjustment_type</th>
                        <th>adjustment_value</th>
                        <th>priority</th>
                    </tr>
                </thead>