MES/app/models/Employee.php

<?php
namespace app\models;

use core\base\Model;

/**
 * 员工模型
 */
class Employee extends Model
{
    protected $table = 'employee';

    // 根据员工编号查找
    public function findByEmpNo($emp_no)
    {
        return $this->where(['emp_no = :emp_no'], [':emp_no' => $emp_no])->fetch();
    }

    /**
     * 验证登录（支持 bcrypt 和旧版 MD5 兼容）
     */
    public function validateLogin($emp_no, $password)
    {
        // 先按工号查找用户
        $user = $this->where(['emp_no = :emp_no'], [':emp_no' => $emp_no])->fetch();
        if (!$user) {
            $ua = isset($_SERVER['HTTP_USER_AGENT']) ? substr($_SERVER['HTTP_USER_AGENT'], 0, 150) : 'unknown';
            $sess = session_id() ? hash('sha256', session_id()) : 'none';
            error_log("[LOGIN_DIAG] emp_no_len=" . strlen($emp_no) . " emp_no_raw='" . $emp_no . "' found_user=0 ua={$ua} sess_hash={$sess}");
            return false;
        }

        // 判断密码是否为 bcrypt 格式（bcrypt 哈希总是以 $2y$ 开头）
        $isBcrypt = (substr($user['password'], 0, 4) === '$2y$');
        $pwdFmt = $isBcrypt ? 'bcrypt' : (strlen($user['password']) === 32 ? 'md5' : 'other');
        $ua = isset($_SERVER['HTTP_USER_AGENT']) ? substr($_SERVER['HTTP_USER_AGENT'], 0, 150) : 'unknown';
        $sess = session_id() ? hash('sha256', session_id()) : 'none';
        $pwdLen = strlen($password);
        error_log("[LOGIN_DIAG] emp_no_len=" . strlen($emp_no) . " emp_no_raw='" . $emp_no . "' found_user=1 pwd_fmt={$pwdFmt} pwd_len={$pwdLen} ua={$ua} sess_hash={$sess}");
        
        if ($isBcrypt) {
            if (password_verify($password, $user['password'])) {
                // 如果算法需要升级，自动更新哈希
                if (password_needs_rehash($user['password'], PASSWORD_BCRYPT)) {
                    $this->updatePasswordHash($user['id'], $password);
                }
                return $user;
            }
            error_log("[LOGIN_DIAG] PWD_VERIFY_FAIL pwd_len={$pwdLen} pwd_hash_len=" . strlen($user['password']) . " ua={$ua} sess_hash={$sess}");
            return false;
        }

        // 兼容旧版 MD5 密码
        if (md5($password) === $user['password']) {
            // 自动升级为 bcrypt
            $this->updatePasswordHash($user['id'], $password);
            return $user;
        }

        return false;
    }

    /**
     * 更新密码哈希为 bcrypt
     */
    private function updatePasswordHash($id, $password)
    {
        $hash = password_hash($password, PASSWORD_BCRYPT, ['cost' => 12]);
        $this->where(['id = :id'], [':id' => $id])->update(['password' => $hash]);
    }

    /**
     * 生成密码哈希
     */
    public function hashPassword($password)
    {
        return password_hash($password, PASSWORD_BCRYPT, ['cost' => 12]);
    }

    /**
     * 密码复杂度校验（P1：强制强密码策略）
     * 要求：≥12 位，且同时包含大写字母、小写字母、数字、特殊字符
     * @throws \RuntimeException 不满足时抛出异常
     */
    public function validatePasswordStrength($password)
    {
        if (!is_string($password) || $password === '') {
            throw new \RuntimeException('密码不能为空');
        }
        if (mb_strlen($password) < 12) {
            throw new \RuntimeException('密码长度至少 12 位');
        }
        if (!preg_match('/[A-Z]/', $password)) {
            throw new \RuntimeException('密码必须包含至少一个大写字母');
        }
        if (!preg_match('/[a-z]/', $password)) {
            throw new \RuntimeException('密码必须包含至少一个小写字母');
        }
        if (!preg_match('/[0-9]/', $password)) {
            throw new \RuntimeException('密码必须包含至少一个数字');
        }
        if (!preg_match('/[^A-Za-z0-9]/', $password)) {
            throw new \RuntimeException('密码必须包含至少一个特殊字符（如 !@#$%^&*）');
        }
        // 拒绝常见弱密码
        $weak = ['123456', 'password', 'admin123', 'qwerty', '111111', '12345678', 'abc123'];
        if (in_array(strtolower($password), $weak, true)) {
            throw new \RuntimeException('密码过于常见，请更换');
        }
    }

    // 重置密码
    public function resetPassword($id, $new_password)
    {
        $this->validatePasswordStrength($new_password);
        $hash = $this->hashPassword($new_password);
        return $this->where(['id = :id'], [':id' => $id])->update(['password' => $hash]);
    }

    // 获取所有员工
    public function getAll()
    {
        return $this->order(['id ASC'])->fetchAll();
    }

    // 添加员工
    public function addEmployee($data)
    {
        if (!isset($data['password']) || empty(trim($data['password']))) {
            // 生成随机强密码
            $randomPwd = bin2hex(random_bytes(8)); // 16位随机密码
            $data['password'] = $this->hashPassword($randomPwd);
            // 返回生成的密码供管理员告知用户
            $data['_generated_password'] = $randomPwd;
        } else {
            // P1：密码复杂度校验（≥12位，含大小写+数字+特殊字符）
            $this->validatePasswordStrength($data['password']);
            $data['password'] = $this->hashPassword($data['password']);
        }
        // 移除 _generated_password 再写入
        $generatedPwd = $data['_generated_password'] ?? null;
        unset($data['_generated_password']);
        $id = $this->add($data);
        if ($id && $generatedPwd) {
            // 返回生成的密码
            $this->_lastGeneratedPwd = $generatedPwd;
        }
        return $id;
    }
    
    // 获取最后生成的密码
    public function getLastGeneratedPwd()
    {
        return $this->_lastGeneratedPwd ?? null;
    }
    private $_lastGeneratedPwd = null;

    // 更新员工
    public function updateEmployee($id, $data)
    {
        unset($data['password']); // 不允许直接更新密码
        return $this->where(['id = :id'], [':id' => $id])->update($data);
    }

    // 根据类目获取员工列表
    public function getByCategory($category)
    {
        if ($category === 'all') {
            return $this->order(['id ASC'])->fetchAll();
        }
        return $this->where(['category = :cat OR role = :super'], [
            ':cat' => $category,
            ':super' => 'super_admin'
        ])->order(['id ASC'])->fetchAll();
    }
}