在制造业和项目管理中，智能排产是一个关键环节，它能够优化资源分配、提高生产效率。本教程将指导您如何在WordPress中开发一个小批量定制插件，实现智能排产功能。我们将创建一个完整的插件，包含前端表单、排产算法和结果展示。

在开始编码之前，我们先规划插件的基本结构：

1. 数据库表设计 - 存储订单和排产信息
2. 管理界面 - 后台管理订单和排产设置
3. 前端表单 - 用户提交定制订单
4. 排产算法 - 核心智能排产逻辑
5. 结果展示 - 显示排产计划和甘特图

首先，在WordPress的wp-content/plugins目录下创建新文件夹smart-production-scheduler，并创建以下文件：

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<?php
/**
 * Plugin Name: 智能排产系统
 * Plugin URI: https://yourwebsite.com/
 * Description: 小批量定制产品的智能排产插件
 * Version: 1.0.0
 * Author: 您的名称
 * License: GPL v2 or later
 */

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

// 定义插件常量
define('SPS_VERSION', '1.0.0');
define('SPS_PLUGIN_DIR', plugin_dir_path(__FILE__));
define('SPS_PLUGIN_URL', plugin_dir_url(__FILE__));

// 初始化插件
require_once SPS_PLUGIN_DIR . 'includes/class-database.php';
require_once SPS_PLUGIN_DIR . 'includes/class-scheduler.php';
require_once SPS_PLUGIN_DIR . 'includes/class-frontend.php';
require_once SPS_PLUGIN_DIR . 'includes/class-admin.php';

// 激活和停用钩子
register_activation_hook(__FILE__, array('SPS_Database', 'create_tables'));
register_deactivation_hook(__FILE__, array('SPS_Database', 'drop_tables'));

// 初始化插件类
class Smart_Production_Scheduler {
    
    private static $instance = null;
    
    public static function get_instance() {
        if (null === self::$instance) {
            self::$instance = new self();
        }
        return self::$instance;
    }
    
    private function __construct() {
        $this->init_hooks();
    }
    
    private function init_hooks() {
        add_action('init', array($this, 'load_textdomain'));
        
        // 初始化各个模块
        SPS_Database::init();
        SPS_Scheduler::init();
        SPS_Frontend::init();
        SPS_Admin::init();
    }
    
    public function load_textdomain() {
        load_plugin_textdomain('smart-production-scheduler', false, dirname(plugin_basename(__FILE__)) . '/languages/');
    }
}

// 启动插件
Smart_Production_Scheduler::get_instance();
?>

在includes/class-database.php中创建数据库表：

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<?php
/**
 * 数据库处理类
 */
class SPS_Database {
    
    public static function init() {
        // 数据库初始化代码
    }
    
    /**
     * 创建插件所需的数据库表
     */
    public static function create_tables() {
        global $wpdb;
        
        $charset_collate = $wpdb->get_charset_collate();
        
        // 订单表
        $orders_table = $wpdb->prefix . 'sps_orders';
        $orders_sql = "CREATE TABLE IF NOT EXISTS $orders_table (
            id INT(11) NOT NULL AUTO_INCREMENT,
            customer_name VARCHAR(100) NOT NULL,
            product_type VARCHAR(50) NOT NULL,
            quantity INT(11) NOT NULL,
            production_time INT(11) NOT NULL COMMENT '生产所需时间（小时）',
            priority INT(11) DEFAULT 5 COMMENT '优先级，1-10，1为最高',
            due_date DATE NOT NULL COMMENT '交货日期',
            status VARCHAR(20) DEFAULT 'pending' COMMENT '订单状态',
            created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
            PRIMARY KEY (id)
        ) $charset_collate;";
        
        // 排产计划表
        $schedule_table = $wpdb->prefix . 'sps_schedule';
        $schedule_sql = "CREATE TABLE IF NOT EXISTS $schedule_table (
            id INT(11) NOT NULL AUTO_INCREMENT,
            order_id INT(11) NOT NULL,
            machine_id INT(11) NOT NULL COMMENT '机器ID',
            start_time DATETIME NOT NULL,
            end_time DATETIME NOT NULL,
            completed TINYINT(1) DEFAULT 0 COMMENT '是否完成',
            created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
            PRIMARY KEY (id),
            FOREIGN KEY (order_id) REFERENCES $orders_table(id) ON DELETE CASCADE
        ) $charset_collate;";
        
        // 机器资源表
        $machines_table = $wpdb->prefix . 'sps_machines';
        $machines_sql = "CREATE TABLE IF NOT EXISTS $machines_table (
            id INT(11) NOT NULL AUTO_INCREMENT,
            machine_name VARCHAR(100) NOT NULL,
            capacity INT(11) NOT NULL COMMENT '每小时产能',
            status VARCHAR(20) DEFAULT 'available' COMMENT '机器状态',
            maintenance_schedule TEXT COMMENT '维护计划',
            PRIMARY KEY (id)
        ) $charset_collate;";
        
        require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
        dbDelta($orders_sql);
        dbDelta($schedule_sql);
        dbDelta($machines_sql);
        
        // 插入示例机器数据
        self::insert_sample_machines();
    }
    
    /**
     * 插入示例机器数据
     */
    private static function insert_sample_machines() {
        global $wpdb;
        $table = $wpdb->prefix . 'sps_machines';
        
        $machines = array(
            array('machine_name' => 'CNC机床1', 'capacity' => 10),
            array('machine_name' => 'CNC机床2', 'capacity' => 8),
            array('machine_name' => '3D打印机1', 'capacity' => 5),
            array('machine_name' => '激光切割机', 'capacity' => 12),
        );
        
        foreach ($machines as $machine) {
            $wpdb->insert($table, $machine);
        }
    }
    
    /**
     * 删除数据库表（插件停用时）
     */
    public static function drop_tables() {
        global $wpdb;
        
        $tables = array(
            $wpdb->prefix . 'sps_schedule',
            $wpdb->prefix . 'sps_orders',
            $wpdb->prefix . 'sps_machines',
        );
        
        foreach ($tables as $table) {
            $wpdb->query("DROP TABLE IF EXISTS $table");
        }
    }
}
?>

在includes/class-scheduler.php中实现核心排产算法：

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<?php
/**
 * 智能排产算法类
 */
class SPS_Scheduler {
    
    public static function init() {
        add_action('sps_generate_schedule', array(__CLASS__, 'generate_schedule'));
    }
    
    /**
     * 智能排产主函数
     * @param array $orders 订单数组
     * @param array $machines 机器数组
     * @return array 排产结果
     */
    public static function intelligent_scheduling($orders, $machines) {
        // 按优先级和交货日期排序订单
        usort($orders, function($a, $b) {
            if ($a['priority'] == $b['priority']) {
                return strtotime($a['due_date']) - strtotime($b['due_date']);
            }
            return $a['priority'] - $b['priority'];
        });
        
        $schedule = array();
        $machine_availability = array();
        
        // 初始化机器可用时间
        foreach ($machines as $machine) {
            $machine_availability[$machine['id']] = current_time('mysql');
        }
        
        // 为每个订单分配机器
        foreach ($orders as $order) {
            $best_machine = self::find_best_machine($order, $machines, $machine_availability);
            
            if ($best_machine) {
                $start_time = $machine_availability[$best_machine['id']];
                $end_time = self::calculate_end_time($start_time, $order['production_time']);
                
                $schedule[] = array(
                    'order_id' => $order['id'],
                    'machine_id' => $best_machine['id'],
                    'start_time' => $start_time,
                    'end_time' => $end_time,
                    'order_details' => $order
                );
                
                // 更新机器可用时间
                $machine_availability[$best_machine['id']] = $end_time;
            }
        }
        
        return $schedule;
    }
    
    /**
     * 为订单寻找最佳机器
     * @param array $order 订单信息
     * @param array $machines 可用机器
     * @param array $availability 机器可用时间
     * @return array|null 最佳机器信息
     */
    private static function find_best_machine($order, $machines, $availability) {
        $best_machine = null;
        $best_score = PHP_INT_MAX;
        
        foreach ($machines as $machine) {
            if ($machine['status'] !== 'available') {
                continue;
            }
            
            // 计算分数：基于产能和可用时间
            $capacity_score = $order['production_time'] / $machine['capacity'];
            $availability_time = strtotime($availability[$machine['id']]);
            $time_score = $availability_time;
            
            // 综合分数（可根据需求调整权重）
            $total_score = $capacity_score * 0.7 + $time_score * 0.3;
            
            if ($total_score < $best_score) {
                $best_score = $total_score;
                $best_machine = $machine;
            }
        }
        
        return $best_machine;
    }
    
    /**
     * 计算结束时间
     * @param string $start_time 开始时间
     * @param int $production_hours 生产所需小时数
     * @return string 结束时间
     */
    private static function calculate_end_time($start_time, $production_hours) {
        $start_timestamp = strtotime($start_time);
        
        // 考虑工作时间（假设每天工作8小时）
        $work_hours_per_day = 8;
        $work_days_needed = ceil($production_hours / $work_hours_per_day);
        
        // 计算实际结束时间（跳过周末）
        $current_day = 0;
        $hours_remaining = $production_hours;
        
        while ($hours_remaining > 0) {
            $current_timestamp = $start_timestamp + ($current_day * 86400);
            $day_of_week = date('N', $current_timestamp);
            
            // 跳过周末（6=周六，7=周日）
            if ($day_of_week < 6) {
                $hours_today = min($work_hours_per_day, $hours_remaining);
                $hours_remaining -= $hours_today;
            }
            
            $current_day++;
        }
        
        $end_timestamp = $start_timestamp + ($current_day * 86400);
        return date('Y-m-d H:i:s', $end_timestamp);
    }
    
    /**
     * 生成排产计划
     */
    public static function generate_schedule() {
        global $wpdb;
        
        // 获取待排产的订单
        $orders_table = $wpdb->prefix . 'sps_orders';
        $orders = $wpdb->get_results(
            "SELECT * FROM $orders_table WHERE status = 'pending' ORDER BY priority, due_date",
            ARRAY_A
        );
        
        // 获取可用机器
        $machines_table = $wpdb->prefix . 'sps_machines';
        $machines = $wpdb->get_results(
            "SELECT * FROM $machines_table WHERE status = 'available'",
            ARRAY_A
        );
        
        if (empty($orders) || empty($machines)) {
            return false;
        }
        
        // 执行智能排产
        $schedule = self::intelligent_scheduling($orders, $machines);
        
        // 保存排产结果到数据库
        $schedule_table = $wpdb->prefix . 'sps_schedule';
        
        foreach ($schedule as $item) {
            $wpdb->insert($schedule_table, array(
                'order_id' => $item['order_id'],
                'machine_id' => $item['machine_id'],
                'start_time' => $item['start_time'],
                'end_time' => $item['end_time']
            ));
            
            // 更新订单状态
            $wpdb->update(
                $orders_table,
                array('status' => 'scheduled'),
                array('id' => $item['order_id'])
            );
        }
        
        return $schedule;
    }
}
?>

在includes/class-frontend.php中创建用户提交订单的表单：

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<?php
/**
 * 前端处理类
 */
class SPS_Frontend {
    
    public static function init() {
        add_shortcode('sps_order_form', array(__CLASS__, 'order_form_shortcode'));
        add_action('wp_enqueue_scripts', array(__CLASS__, 'enqueue_scripts'));
        add_action('wp_ajax_sps_submit_order', array(__CLASS__, 'ajax_submit_order'));
        add_action('wp_ajax_nopriv_sps_submit_order', array(__CLASS__, 'ajax_submit_order'));
    }
    
    /**
     * 订单表单短代码
     */
    public static function order_form_shortcode() {
        ob_start();
        ?>
        <div class="sps-order-form-container">
            <h3>提交定制订单</h3>
            <form id="sps-order-form" method="post">
                <?php wp_nonce_field('sps_submit_order', 'sps_nonce'); ?>
                
                <div class="form-group">
                    <label for="customer_name">客户名称 *</label>
                    <input type="text" id="customer_name" name="customer_name" required>
                </div>
                
                <div class="form-group">
                    <label for="product_type">产品类型 *</label>
                    <select id="product_type" name="product_type" required>
                        <option value="">请选择</option>
                        <option value="metal_part">金属零件</option>
                        <option value="plastic_part">塑料零件</option>
                        <option value="electronic_assembly">电子装配</option>
                        <option value="custom_prototype">定制原型</option>
                    </select>
                </div>
                
                <div class="form-group">
                    <label for="quantity">数量 *</label>
                    <input type="number" id="quantity" name="quantity" min="1" max="1000" required>
                    <small>小批量定制：1-1000件</small>
                </div>
                
                <div class="form-group">
                    <label for="production_time">预计生产时间（小时） *</label>
                    <input type="number" id="production_time" name="production_time" min="1" max="500" required>
                </div>
                
                <div class="form-group">
                    <label for="priority">优先级 *</label>
                    <select id="priority" name="priority" required>
                        <option value="1">最高 (1)</option>
                        <option value="3">高 (3)</option>
                        <option value="5" selected>中 (5)</option>
                        <option value="7">低 (7)</option>
                        <option value="10">最低 (10)</option>
                    </select>
                </div>
                
                <div class="form-group">
                    <label for="due_date">期望交货日期 *</label>
                    <input type="date" id="due_date" name="due_date" required>
                </div>
                
                <div class="form-group">
                    <label for="notes">备注</label>
                    <textarea id="notes" name="notes" rows="3"></textarea>
                </div>
                
                <button type="submit" class="sps-submit-btn">提交订单</button>
                
                <div id="sps-response-message"></div>
            </form>
        </div>
        
        <style>
            .sps-order-form-container {
                max-width: 600px;
                margin: 20px auto;
                padding: 20px;
                background: #f9f9f9;
                border-radius: 8px;
                box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            }
            .form-group {
                margin-bottom: 15px;
            }
            .form-group label {
                display: block;
                margin-bottom: 5px;
                font-weight: bold;
            }
            .form-group input,
            .form-group select,
            .form-group textarea {
                width: 100%;
                padding: 8px;
                border: 1px solid #ddd;
                border-radius: 4px;
            }
            .sps-submit-btn {
                background: #0073aa;
                color: white;
                padding: 10px 20px;
                border: none;
                border-radius: 4px;
                cursor: pointer;
                font-size: 16px;
            }
            .sps-submit-btn:hover {
                background: #005a87;
            }
            #sps-response-message {
                margin-top: 15px;
                padding: 10px;
                border-radius: 4px;
            }
            .success {
                background: #d4edda;
                color: #155724;
                border: 1px solid #c3e6cb;
            }
            .error {
                background: #f8d7da;
                color: #721c24;

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                border: 1px solid #f5c6cb;
            }
        </style>
        <?php
        return ob_get_clean();
    }
    
    /**
     * 提交订单的AJAX处理
     */
    public static function ajax_submit_order() {
        // 验证nonce
        if (!wp_verify_nonce($_POST['sps_nonce'], 'sps_submit_order')) {
            wp_die('安全验证失败');
        }
        
        // 验证数据
        $required_fields = array('customer_name', 'product_type', 'quantity', 'production_time', 'priority', 'due_date');
        foreach ($required_fields as $field) {
            if (empty($_POST[$field])) {
                wp_send_json_error('请填写所有必填字段');
            }
        }
        
        global $wpdb;
        $table = $wpdb->prefix . 'sps_orders';
        
        // 准备数据
        $order_data = array(
            'customer_name' => sanitize_text_field($_POST['customer_name']),
            'product_type' => sanitize_text_field($_POST['product_type']),
            'quantity' => intval($_POST['quantity']),
            'production_time' => intval($_POST['production_time']),
            'priority' => intval($_POST['priority']),
            'due_date' => sanitize_text_field($_POST['due_date']),
            'status' => 'pending'
        );
        
        // 插入数据库
        $result = $wpdb->insert($table, $order_data);
        
        if ($result) {
            // 触发排产计划生成（可以设置为定时任务或手动触发）
            do_action('sps_generate_schedule');
            
            wp_send_json_success(array(
                'message' => '订单提交成功！订单ID：' . $wpdb->insert_id,
                'order_id' => $wpdb->insert_id
            ));
        } else {
            wp_send_json_error('订单提交失败，请重试');
        }
    }
    
    /**
     * 加载前端脚本和样式
     */
    public static function enqueue_scripts() {
        wp_enqueue_style('sps-frontend-style', SPS_PLUGIN_URL . 'assets/css/frontend.css');
        wp_enqueue_script('sps-frontend-script', SPS_PLUGIN_URL . 'assets/js/frontend.js', array('jquery'), SPS_VERSION, true);
        
        wp_localize_script('sps-frontend-script', 'sps_ajax', array(
            'ajax_url' => admin_url('admin-ajax.php'),
            'nonce' => wp_create_nonce('sps_submit_order')
        ));
    }
}
?>

在includes/class-admin.php中创建管理界面：

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<?php
/**
 * 后台管理类
 */
class SPS_Admin {
    
    public static function init() {
        add_action('admin_menu', array(__CLASS__, 'add_admin_menu'));
        add_action('admin_enqueue_scripts', array(__CLASS__, 'enqueue_admin_scripts'));
        add_action('admin_post_generate_schedule', array(__CLASS__, 'handle_generate_schedule'));
    }
    
    /**
     * 添加管理菜单
     */
    public static function add_admin_menu() {
        add_menu_page(
            '智能排产系统',
            '智能排产',
            'manage_options',
            'smart-production-scheduler',
            array(__CLASS__, 'display_dashboard'),
            'dashicons-schedule',
            30
        );
        
        add_submenu_page(
            'smart-production-scheduler',
            '订单管理',
            '订单管理',
            'manage_options',
            'sps-orders',
            array(__CLASS__, 'display_orders_page')
        );
        
        add_submenu_page(
            'smart-production-scheduler',
            '排产计划',
            '排产计划',
            'manage_options',
            'sps-schedule',
            array(__CLASS__, 'display_schedule_page')
        );
        
        add_submenu_page(
            'smart-production-scheduler',
            '机器管理',
            '机器管理',
            'manage_options',
            'sps-machines',
            array(__CLASS__, 'display_machines_page')
        );
        
        add_submenu_page(
            'smart-production-scheduler',
            '排产设置',
            '排产设置',
            'manage_options',
            'sps-settings',
            array(__CLASS__, 'display_settings_page')
        );
    }
    
    /**
     * 显示仪表板
     */
    public static function display_dashboard() {
        global $wpdb;
        
        // 获取统计数据
        $orders_table = $wpdb->prefix . 'sps_orders';
        $schedule_table = $wpdb->prefix . 'sps_schedule';
        $machines_table = $wpdb->prefix . 'sps_machines';
        
        $total_orders = $wpdb->get_var("SELECT COUNT(*) FROM $orders_table");
        $pending_orders = $wpdb->get_var("SELECT COUNT(*) FROM $orders_table WHERE status = 'pending'");
        $completed_orders = $wpdb->get_var("SELECT COUNT(*) FROM $orders_table WHERE status = 'completed'");
        $active_machines = $wpdb->get_var("SELECT COUNT(*) FROM $machines_table WHERE status = 'available'");
        
        ?>
        <div class="wrap">
            <h1>智能排产系统仪表板</h1>
            
            <div class="sps-dashboard-widgets">
                <div class="sps-widget">
                    <h3>总订单数</h3>
                    <p class="sps-stat"><?php echo $total_orders; ?></p>
                </div>
                
                <div class="sps-widget">
                    <h3>待处理订单</h3>
                    <p class="sps-stat"><?php echo $pending_orders; ?></p>
                </div>
                
                <div class="sps-widget">
                    <h3>已完成订单</h3>
                    <p class="sps-stat"><?php echo $completed_orders; ?></p>
                </div>
                
                <div class="sps-widget">
                    <h3>可用机器</h3>
                    <p class="sps-stat"><?php echo $active_machines; ?></p>
                </div>
            </div>
            
            <div class="sps-dashboard-actions">
                <form method="post" action="<?php echo admin_url('admin-post.php'); ?>">
                    <input type="hidden" name="action" value="generate_schedule">
                    <?php wp_nonce_field('generate_schedule_action', 'generate_schedule_nonce'); ?>
                    <button type="submit" class="button button-primary button-large">
                        立即生成排产计划
                    </button>
                </form>
            </div>
            
            <div class="sps-recent-orders">
                <h2>最近订单</h2>
                <?php self::display_orders_table(5); ?>
            </div>
            
            <div class="sps-upcoming-schedule">
                <h2>即将开始的排产</h2>
                <?php self::display_upcoming_schedule(); ?>
            </div>
        </div>
        
        <style>
            .sps-dashboard-widgets {
                display: grid;
                grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
                gap: 20px;
                margin: 20px 0;
            }
            .sps-widget {
                background: white;
                padding: 20px;
                border-radius: 8px;
                box-shadow: 0 2px 5px rgba(0,0,0,0.1);
                text-align: center;
            }
            .sps-stat {
                font-size: 2em;
                font-weight: bold;
                color: #0073aa;
                margin: 10px 0;
            }
            .sps-dashboard-actions {
                margin: 30px 0;
                padding: 20px;
                background: white;
                border-radius: 8px;
            }
        </style>
        <?php
    }
    
    /**
     * 显示订单管理页面
     */
    public static function display_orders_page() {
        global $wpdb;
        $table = $wpdb->prefix . 'sps_orders';
        
        // 处理批量操作
        if (isset($_POST['action']) && $_POST['action'] == 'bulk_action') {
            self::handle_bulk_actions();
        }
        
        // 获取订单数据
        $orders = $wpdb->get_results("SELECT * FROM $table ORDER BY created_at DESC", ARRAY_A);
        
        ?>
        <div class="wrap">
            <h1>订单管理</h1>
            
            <form method="post" action="">
                <?php wp_nonce_field('bulk_action', 'bulk_action_nonce'); ?>
                
                <div class="tablenav top">
                    <div class="alignleft actions bulkactions">
                        <select name="bulk_action">
                            <option value="">批量操作</option>
                            <option value="delete">删除</option>
                            <option value="mark_completed">标记为完成</option>
                            <option value="mark_pending">标记为待处理</option>
                        </select>
                        <button type="submit" class="button action">应用</button>
                    </div>
                </div>
                
                <table class="wp-list-table widefat fixed striped">
                    <thead>
                        <tr>
                            <th class="check-column"><input type="checkbox" id="cb-select-all"></th>
                            <th>ID</th>
                            <th>客户名称</th>
                            <th>产品类型</th>
                            <th>数量</th>
                            <th>生产时间</th>
                            <th>优先级</th>
                            <th>交货日期</th>
                            <th>状态</th>
                            <th>创建时间</th>
                            <th>操作</th>
                        </tr>
                    </thead>
                    <tbody>
                        <?php foreach ($orders as $order): ?>
                        <tr>
                            <th scope="row"><input type="checkbox" name="order_ids[]" value="<?php echo $order['id']; ?>"></th>
                            <td><?php echo $order['id']; ?></td>
                            <td><?php echo esc_html($order['customer_name']); ?></td>
                            <td><?php echo esc_html($order['product_type']); ?></td>
                            <td><?php echo $order['quantity']; ?></td>
                            <td><?php echo $order['production_time']; ?> 小时</td>
                            <td>
                                <span class="priority-badge priority-<?php echo $order['priority']; ?>">
                                    <?php echo $order['priority']; ?>
                                </span>
                            </td>
                            <td><?php echo $order['due_date']; ?></td>
                            <td>
                                <span class="status-badge status-<?php echo $order['status']; ?>">
                                    <?php echo self::get_status_label($order['status']); ?>
                                </span>
                            </td>
                            <td><?php echo $order['created_at']; ?></td>
                            <td>
                                <a href="#" class="button button-small view-order" data-id="<?php echo $order['id']; ?>">查看</a>
                                <a href="#" class="button button-small delete-order" data-id="<?php echo $order['id']; ?>">删除</a>
                            </td>
                        </tr>
                        <?php endforeach; ?>
                    </tbody>
                </table>
            </form>
        </div>
        
        <style>
            .priority-badge {
                display: inline-block;
                padding: 2px 8px;
                border-radius: 12px;
                font-size: 12px;
                font-weight: bold;
            }
            .priority-1, .priority-2, .priority-3 {
                background: #ff6b6b;
                color: white;
            }
            .priority-4, .priority-5, .priority-6 {
                background: #ffd93d;
                color: #333;
            }
            .priority-7, .priority-8, .priority-9, .priority-10 {
                background: #6bcf7f;
                color: white;
            }
            .status-badge {
                display: inline-block;
                padding: 2px 8px;
                border-radius: 12px;
                font-size: 12px;
                font-weight: bold;
            }
            .status-pending {
                background: #ffd93d;
                color: #333;
            }
            .status-scheduled {
                background: #4d96ff;
                color: white;
            }
            .status-completed {
                background: #6bcf7f;
                color: white;
            }
        </style>
        
        <script>
        jQuery(document).ready(function($) {
            // 全选/取消全选
            $('#cb-select-all').on('change', function() {
                $('input[name="order_ids[]"]').prop('checked', this.checked);
            });
            
            // 查看订单详情
            $('.view-order').on('click', function(e) {
                e.preventDefault();
                var orderId = $(this).data('id');
                // 这里可以添加查看详情的逻辑
                alert('查看订单 ' + orderId + ' 的详情');
            });
            
            // 删除订单
            $('.delete-order').on('click', function(e) {
                e.preventDefault();
                if (confirm('确定要删除这个订单吗？')) {
                    var orderId = $(this).data('id');
                    // 这里可以添加删除订单的AJAX请求
                }
            });
        });
        </script>
        <?php
    }
    
    /**
     * 显示排产计划页面
     */
    public static function display_schedule_page() {
        global $wpdb;
        
        $schedule_table = $wpdb->prefix . 'sps_schedule';
        $orders_table = $wpdb->prefix . 'sps_orders';
        $machines_table = $wpdb->prefix . 'sps_machines';
        
        // 获取排产数据
        $schedule = $wpdb->get_results("
            SELECT s.*, o.customer_name, o.product_type, m.machine_name 
            FROM $schedule_table s
            LEFT JOIN $orders_table o ON s.order_id = o.id
            LEFT JOIN $machines_table m ON s.machine_id = m.id
            ORDER BY s.start_time ASC
        ", ARRAY_A);
        
        ?>
        <div class="wrap">
            <h1>排产计划</h1>
            
            <div class="sps-gantt-chart">
                <h2>甘特图</h2>
                <div class="gantt-container">
                    <?php foreach ($schedule as $item): 
                        $start_date = new DateTime($item['start_time']);
                        $end_date = new DateTime($item['end_time']);
                        $duration = $start_date->diff($end_date)->days;
                    ?>
                    <div class="gantt-item" style="margin-left: <?php echo $duration * 10; ?>px; width: <?php echo max(50, $duration * 20); ?>px;">
                        <div class="gantt-bar">
                            <span class="gantt-label">
                                <?php echo esc_html($item['customer_name']); ?> - 
                                <?php echo esc_html($item['product_type']); ?>
                            </span>
                        </div>
                        <div class="gantt-info">
                            机器: <?php echo esc_html($item['machine_name']); ?><br>
                            开始: <?php echo $item['start_time']; ?><br>
                            结束: <?php echo $item['end_time']; ?>
                        </div>
                    </div>
                    <?php endforeach; ?>
                </div>
            </div>
            
            <table class="wp-list-table widefat fixed striped">
                <thead>
                    <tr>
                        <th>订单ID</th>
                        <th>客户名称</th>
                        <th>产品类型</th>
                        <th>机器</th>
                        <th>开始时间</th>
                        <th>结束时间</th>
                        <th>状态</th>
                        <th>操作</th>
                    </tr>
                </thead>
                <tbody>
                    <?php foreach ($schedule as $item): ?>
                    <tr>
                        <td><?php echo $item['order_id']; ?></td>
                        <td><?php echo esc_html($item['customer_name']); ?></td>
                        <td><?php echo esc_html($item['product_type']); ?></td>
                        <td><?php echo esc_html($item['machine_name']); ?></td>
                        <td><?php echo $item['start_time']; ?></td>
                        <td><?php echo $item['end_time']; ?></td>
                        <td>
                            <?php if ($item['completed']): ?>
                                <span class="status-badge status-completed">已完成</span>
                            <?php else: ?>
                                <span class="status-badge status-scheduled">已排产</span>
                            <?php endif; ?>
                        </td>
                        <td>
                            <button class="button button-small mark-completed" data-id="<?php echo $item['id']; ?>">
                                <?php echo $item['completed'] ? '取消完成' : '标记完成'; ?>
                            </button>
                        </td>
                    </tr>
                    <?php endforeach; ?>
                </tbody>
            </table>
        </div>
        
        <style>
            .sps-gantt-chart {
                margin: 20px 0;
                padding: 20px;
                background: white;
                border-radius: 8px;
            }
            .gantt-container {
                padding: 20px;
                background: #f5f5f5;
                border-radius: 4px;
                overflow-x: auto;
            }
            .gantt-item {
                margin: 10px 0;
                position: relative;
            }
            .gantt-bar {
                background: #4d96ff;
                color: white;
                padding: 8px 12px;
                border-radius: 4px;
                cursor: pointer;
                transition: background 0.3s;
            }
            .gantt-bar:hover {
                background: #2d76df;
            }
            .gantt-info {
                display: none;
                position: absolute;