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app/service/UserService.php

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+<?php
+declare (strict_types = 1);
+
+namespace app\service;
+
+/**
+ * 用户服务类
+ * 用于处理用户账号管理相关逻辑
+ */
+class UserService
+{
+    /**
+     * 账号数据文件路径
+     */
+    private const USERS_FILE = 'users.json';
+    
+    /**
+     * 管理员账号（固定）
+     */
+    private const ADMIN_USERNAME = 'admin';
+    private const ADMIN_PASSWORD = '123456';
+    
+    /**
+     * 初始化账号数据文件
+     */
+    private function initUsersFile(): void
+    {
+        $filePath = $this->getUsersFilePath();
+        if (!file_exists($filePath)) {
+            $dir = dirname($filePath);
+            if (!is_dir($dir)) {
+                mkdir($dir, 0755, true);
+            }
+            file_put_contents($filePath, json_encode([], JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE));
+        }
+    }
+    
+    /**
+     * 获取账号数据文件路径
+     * @return string
+     */
+    private function getUsersFilePath(): string
+    {
+        // 获取项目根目录
+        $rootPath = dirname(dirname(__DIR__));
+        $runtimePath = $rootPath . '/runtime';
+        if (!is_dir($runtimePath)) {
+            mkdir($runtimePath, 0755, true);
+        }
+        return $runtimePath . '/' . self::USERS_FILE;
+    }
+    
+    /**
+     * 读取所有账号
+     * @return array
+     */
+    public function getAllUsers(): array
+    {
+        $this->initUsersFile();
+        $filePath = $this->getUsersFilePath();
+        $content = file_get_contents($filePath);
+        $users = json_decode($content, true);
+        return is_array($users) ? $users : [];
+    }
+    
+    /**
+     * 保存账号数据
+     * @param array $users
+     * @return bool
+     */
+    private function saveUsers(array $users): bool
+    {
+        $this->initUsersFile();
+        $filePath = $this->getUsersFilePath();
+        return file_put_contents($filePath, json_encode($users, JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE)) !== false;
+    }
+    
+    /**
+     * 验证登录（包括管理员和普通用户）
+     * @param string $username
+     * @param string $password
+     * @return array|false 返回用户信息或false
+     */
+    public function verifyLogin(string $username, string $password)
+    {
+        // 验证管理员账号
+        if ($username === self::ADMIN_USERNAME && $password === self::ADMIN_PASSWORD) {
+            return [
+                'username' => $username,
+                'is_admin' => true,
+            ];
+        }
+        
+        // 验证普通用户账号
+        $users = $this->getAllUsers();
+        foreach ($users as $user) {
+            if (isset($user['username']) && $user['username'] === $username) {
+                if (isset($user['password']) && $user['password'] === $password) {
+                    return [
+                        'username' => $username,
+                        'is_admin' => false,
+                    ];
+                }
+            }
+        }
+        
+        return false;
+    }
+    
+    /**
+     * 添加账号
+     * @param string $username
+     * @param string $password
+     * @return array ['code' => 1|0, 'msg' => string]
+     */
+    public function addUser(string $username, string $password): array
+    {
+        if (empty($username) || empty($password)) {
+            return ['code' => 0, 'msg' => '用户名和密码不能为空'];
+        }
+        
+        if ($username === self::ADMIN_USERNAME) {
+            return ['code' => 0, 'msg' => '不能添加管理员账号'];
+        }
+        
+        $users = $this->getAllUsers();
+        
+        // 检查用户名是否已存在
+        foreach ($users as $user) {
+            if (isset($user['username']) && $user['username'] === $username) {
+                return ['code' => 0, 'msg' => '用户名已存在'];
+            }
+        }
+        
+        // 添加新用户
+        $users[] = [
+            'username' => $username,
+            'password' => $password,
+            'created_at' => date('Y-m-d H:i:s'),
+        ];
+        
+        if ($this->saveUsers($users)) {
+            return ['code' => 1, 'msg' => '添加成功'];
+        } else {
+            return ['code' => 0, 'msg' => '保存失败'];
+        }
+    }
+    
+    /**
+     * 删除账号
+     * @param string $username
+     * @return array ['code' => 1|0, 'msg' => string]
+     */
+    public function deleteUser(string $username): array
+    {
+        if ($username === self::ADMIN_USERNAME) {
+            return ['code' => 0, 'msg' => '不能删除管理员账号'];
+        }
+        
+        $users = $this->getAllUsers();
+        $newUsers = [];
+        
+        foreach ($users as $user) {
+            if (isset($user['username']) && $user['username'] !== $username) {
+                $newUsers[] = $user;
+            }
+        }
+        
+        if (count($newUsers) === count($users)) {
+            return ['code' => 0, 'msg' => '用户不存在'];
+        }
+        
+        if ($this->saveUsers($newUsers)) {
+            return ['code' => 1, 'msg' => '删除成功'];
+        } else {
+            return ['code' => 0, 'msg' => '保存失败'];
+        }
+    }
+    
+    /**
+     * 检查是否为管理员
+     * @param string $username
+     * @return bool
+     */
+    public function isAdmin(string $username): bool
+    {
+        return $username === self::ADMIN_USERNAME;
+    }
+}