<?php
/*
 * Plugin Name: Bulk User Update
 * Description: A simple admin page to bulk update user passwords, emails, and names.
 * Author: Grok
 * Version: 1.0
 */

// 添加管理菜单
add_action('admin_menu', 'bulk_update_users_menu');
function bulk_update_users_menu() {
    add_menu_page(
        'Bulk Update Users',
        'Bulk Update Users',
        'manage_options',
        'bulk-update-users',
        'bulk_update_users_page',
        'dashicons-admin-users',
        80
    );
}

// 管理页面内容
function bulk_update_users_page() {
    // 检查用户权限
    if (!current_user_can('manage_options')) {
        wp_die('You do not have permission to access this page.');
    }

    // 处理表单提交
    $message = '';
    if (isset($_POST['bulk_update_users_submit']) && check_admin_referer('bulk_update_users_nonce')) {
        $new_password = sanitize_text_field($_POST['new_password']);
        $email_suffix = sanitize_text_field($_POST['email_suffix']);
        $name_prefix = sanitize_text_field($_POST['name_prefix']);
        $selected_role = sanitize_text_field($_POST['user_role']);

        // 获取用户
        $args = array();
        if ($selected_role !== 'all') {
            $args['role'] = $selected_role;
        }
        $users = get_users($args);

        $updated_count = 0;
        foreach ($users as $user) {
            $update_data = array('ID' => $user->ID);

            // 更新密码
            if (!empty($new_password)) {
                wp_set_password($new_password, $user->ID);
            }

            // 更新邮箱
            if (!empty($email_suffix)) {
                $new_email = $user->user_login . $email_suffix;
                $update_data['user_email'] = sanitize_email($new_email);
            }

            // 更新姓名
            if (!empty($name_prefix)) {
                $update_data['display_name'] = $name_prefix . $user->user_login;
                $update_data['first_name'] = $name_prefix . $user->first_name;
                $update_data['last_name'] = $name_prefix . $user->last_name;
            }

            // 执行更新
            if (count($update_data) > 1) { // 确保有除 ID 外的更新内容
                $result = wp_update_user($update_data);
                if (!is_wp_error($result)) {
                    $updated_count++;
                }
            }
       mentions: 
        }

        $message = "Updated $updated_count users successfully.";
    }

    // 获取所有角色
    global $wp_roles;
    $roles = $wp_roles->get_names();
?>

<div class="wrap">
    <h1>Bulk Update Users</h1>
    <?php if ($message) : ?>
        <div class="notice notice-success"><p><?php echo esc_html($message); ?></p></div>
    <?php endif; ?>
    <form method="post" action="">
        <?php wp_nonce_field('bulk_update_users_nonce'); ?>
        <table class="form-table">
            <tr>
                <th><label for="new_password">New Password</label></th>
                <td><input type="text" name="new_password" id="new_password" class="regular-text" placeholder="Leave blank to skip"></td>
            </tr>
            <tr>
                <th><label for="email_suffix">Email Suffix</label></th>
                <td><input type="text" name="email_suffix" id="email_suffix" class="regular-text" placeholder="e.g., @newdomain.com"></td>
            </tr>
            <tr>
                <th><label for="name_prefix">Name Prefix</label></th>
                <td><input type="text" name="name_prefix" id="name_prefix" class="regular-text" placeholder="e.g., Student_"></td>
            </tr>
            <tr>
                <th><label for="user_role">User Role</label></th>
                <td>
                    <select name="user_role" id="user_role">
                        <option value="all">All Roles</option>
                        <?php foreach ($roles as $role_key => $role_name) : ?>
                            <option value="<?php echo esc_attr($role_key); ?>"><?php echo esc_html($role_name); ?></option>
                        <?php endforeach; ?>
                    </select>
                </td>
            </tr>
        </table>
        <?php submit_button('Update Users', 'primary', 'bulk_update_users_submit'); ?>
    </form>
</div>
<?php
}
?>