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server/db.js

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+import Database from 'better-sqlite3';
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const db = new Database(path.join(__dirname, 'life_circle.db'));
+
+db.pragma('journal_mode = WAL');
+db.pragma('foreign_keys = ON');
+
+// 初始化数据表
+db.exec(`
+  CREATE TABLE IF NOT EXISTS users (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    username TEXT NOT NULL UNIQUE,
+    password TEXT NOT NULL,
+    nickname TEXT NOT NULL,
+    avatar TEXT DEFAULT '',
+    phone TEXT DEFAULT '',
+    building TEXT DEFAULT '',
+    bio TEXT DEFAULT '',
+    role TEXT DEFAULT 'user',
+    created_at TEXT DEFAULT (datetime('now', 'localtime'))
+  );
+
+  CREATE TABLE IF NOT EXISTS posts (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    user_id INTEGER NOT NULL,
+    content TEXT NOT NULL,
+    images TEXT DEFAULT '[]',
+    category TEXT DEFAULT '动态',
+    likes INTEGER DEFAULT 0,
+    comments INTEGER DEFAULT 0,
+    created_at TEXT DEFAULT (datetime('now', 'localtime')),
+    FOREIGN KEY (user_id) REFERENCES users(id)
+  );
+
+  CREATE TABLE IF NOT EXISTS comments (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    post_id INTEGER NOT NULL,
+    user_id INTEGER NOT NULL,
+    content TEXT NOT NULL,
+    created_at TEXT DEFAULT (datetime('now', 'localtime')),
+    FOREIGN KEY (post_id) REFERENCES posts(id),
+    FOREIGN KEY (user_id) REFERENCES users(id)
+  );
+
+  CREATE TABLE IF NOT EXISTS likes (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    post_id INTEGER NOT NULL,
+    user_id INTEGER NOT NULL,
+    UNIQUE(post_id, user_id),
+    FOREIGN KEY (post_id) REFERENCES posts(id),
+    FOREIGN KEY (user_id) REFERENCES users(id)
+  );
+
+  CREATE TABLE IF NOT EXISTS notices (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    title TEXT NOT NULL,
+    content TEXT NOT NULL,
+    type TEXT DEFAULT '通知',
+    created_at TEXT DEFAULT (datetime('now', 'localtime'))
+  );
+
+  CREATE TABLE IF NOT EXISTS secondhand (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    user_id INTEGER NOT NULL,
+    title TEXT NOT NULL,
+    description TEXT NOT NULL,
+    price REAL DEFAULT 0,
+    images TEXT DEFAULT '[]',
+    status TEXT DEFAULT '在售',
+    created_at TEXT DEFAULT (datetime('now', 'localtime')),
+    FOREIGN KEY (user_id) REFERENCES users(id)
+  );
+
+  CREATE TABLE IF NOT EXISTS housekeeping (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    user_id INTEGER NOT NULL,
+    title TEXT NOT NULL,
+    description TEXT NOT NULL,
+    price TEXT DEFAULT '',
+    phone TEXT DEFAULT '',
+    created_at TEXT DEFAULT (datetime('now', 'localtime')),
+    FOREIGN KEY (user_id) REFERENCES users(id)
+  );
+`);
+
+export default db;