Class SessionStore

src/server/session/store.ts:55–339

 * Session Store 类
 */
export class SessionStore {
    private baseDir: string;

    constructor(baseDir: string = '.sessionstore') {
        this.baseDir = path.resolve(process.cwd(), baseDir);
        this.ensureDir();
    }

    /**
     * 确保存储目录存在
     */
    private ensureDir(): void {
        if (!fs.existsSync(this.baseDir)) {
            fs.mkdirSync(this.baseDir, {recursive: true});
        }
    }

    /**
     * 获取索引文件路径
     */
    private getIndexPath(): string {
        return path.join(this.baseDir, 'index.json');
    }

    /**
     * 获取 Session 文件路径
     */
    private getSessionPath(sessionId: string): string {
        return path.join(this.baseDir, `${sessionId}.jsonl`);
    }

    /**
     * 读取索引
     */
    private readIndex(): SessionIndex {
        const indexPath = this.getIndexPath();
        if (!fs.existsSync(indexPath)) {
            return {sessions: []};
        }
        try {
            return JSON.parse(fs.readFileSync(indexPath, 'utf8'));
        } catch {
            return {sessions: []};
        }
    }

    /**
     * 写入索引
     */
    private writeIndex(index: SessionIndex): void {
        fs.writeFileSync(this.getIndexPath(), JSON.stringify(index, null, 2));
    }

    /**
     * 生成唯一 ID
     */
    private generateId(): string {
        return `session_${Date.now()}_${Math.random().toString(36).substr(2, 9)}`;