conversation-logger.js
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/**
* ConversationLogger — 对话日志记录器
*
* 目录结构：
* conversations/{conversationId}/
* ├── meta.json ← {title, createdAt, updatedAt, status, stats, ...}
* ├── {messageId}/ ← 每轮对话独立目录
* │ └── messages.log ← [USER] + [MASTER] + [SUB_AGENT] 日志
* └── use/ ← 合并所有轮次（兼容旧前端）
* └── messages.log
*/
const fs = require('fs');
const path = require('path');
class ConversationLogger {
/**
* @param {string} conversationsDir - conversations 根目录
* @param {string} conversationId - 对话 ID
* @param {string} messageId - 本轮消息 ID
* @param {{ userId?: string|number }} [options] - 可选参数
*/
constructor(conversationsDir, conversationId, messageId, options = {}) {
this.conversationsDir = conversationsDir;
this.conversationId = conversationId;
this.messageId = messageId;
this.userId = options.userId ? String(options.userId) : null;
this.convDir = path.join(conversationsDir, conversationId);
this.messageDir = path.join(this.convDir, messageId);
this.useDir = path.join(this.convDir, 'use');
this.trainDir = path.join(this.convDir, 'train');
// 创建目录
fs.mkdirSync(this.messageDir, { recursive: true });
fs.mkdirSync(this.useDir, { recursive: true });
fs.mkdirSync(this.trainDir, { recursive: true });
this._messagesPath = path.join(this.messageDir, 'messages.log');
this._useMessagesPath = path.join(this.useDir, 'messages.log');
// meta.json — 首次创建对话时写入
this._metaPath = path.join(this.convDir, 'meta.json');
}
/**
* 写入或更新 meta.json（自动追踪 status 和 stats）
*/
ensureMeta(title) {
const now = new Date().toISOString();
let meta;
try {
meta = JSON.parse(fs.readFileSync(this._metaPath, 'utf-8'));
meta.updatedAt = now;
if (title && !meta.title) meta.title = title;
} catch {
meta = {
title: title || '',
createdAt: now,
updatedAt: now,
conversationId: this.conversationId,
userId: this.userId,
};
}
// 确保新字段存在（向后兼容旧 meta.json）
if (!meta.status) meta.status = 'running';
if (!meta.stats) {
meta.stats = {
messageCount: 0,
toolCallCount: 0,
subAgentCount: 0,
costUsd: 0,
durationApiMs: 0,
};
}
// 每次 ensureMeta 表示新一轮消息开始
meta.stats.messageCount = (meta.stats.messageCount || 0) + 1;
meta.status = 'running';
fs.writeFileSync(this._metaPath, JSON.stringify(meta, null, 2), 'utf-8');
}
/**
* 累加统计数据
* @param {object} delta - { toolCallCount?, subAgentCount?, costUsd?, durationApiMs? }
*/
addStats(delta) {
try {
const meta = JSON.parse(fs.readFileSync(this._metaPath, 'utf-8'));
if (!meta.stats) meta.stats = {};
for (const [key, val] of Object.entries(delta)) {
meta.stats[key] = (meta.stats[key] || 0) + val;
}
meta.updatedAt = new Date().toISOString();
fs.writeFileSync(this._metaPath, JSON.stringify(meta, null, 2), 'utf-8');
} catch (err) {
console.error(`[ConversationLogger] addStats 失败:`, err.message);
}
}
/**
* 标记对话完成/失败，计算总耗时
* @param {'completed'|'failed'|'idle'} status
* @param {string} [error] - 失败原因
*/
finalize(status, error = null) {
try {
const meta = JSON.parse(fs.readFileSync(this._metaPath, 'utf-8'));
const now = new Date().toISOString();
meta.status = status;
meta.updatedAt = now;
meta.completedAt = now;
meta.durationMs = new Date(now).getTime() - new Date(meta.createdAt).getTime();
if (error) meta.error = error;
fs.writeFileSync(this._metaPath, JSON.stringify(meta, null, 2), 'utf-8');
} catch (err) {
console.error(`[ConversationLogger] finalize 失败:`, err.message);
}
}
/**
* 记录用户消息
*/
logUserMessage(content) {
const line = `${this._ts()} [USER]\n${content}\n\n`;
this._append(this._messagesPath, line);
this._append(this._useMessagesPath, line);
}
/**
* 记录流式文本 chunk（Master 或 Sub Agent）
* Sub Agent 的输出同时写入独立的 train/{agentName}.log
*/
logStreamChunk(agentName, text) {
if (!text || !text.trim()) return;
const tag = agentName.toUpperCase().replace(/-/g, '_');
const line = `${this._ts()} [${tag}] ${text}\n`;
this._append(this._messagesPath, line);
this._append(this._useMessagesPath, line);
// Sub Agent → 独立日志文件 train/{agentName}.log
if (agentName !== 'master') {
const agentLogPath = path.join(this.trainDir, `${agentName}.log`);
this._append(agentLogPath, line);
}
}
/**
* 记录进度消息
*/
logProgress(step, message) {
const line = `${this._ts()} [ORCHESTRATING] ${message}\n`;
this._append(this._messagesPath, line);
this._append(this._useMessagesPath, line);
}
/**
* 记录工具调用
*/
logToolCall(tool, message) {
const line = `${this._ts()} [TOOL] ${tool}: ${message}\n`;
this._append(this._messagesPath, line);
this._append(this._useMessagesPath, line);
}
/**
* 记录最终结果
*/
logResult(result) {
const content = `${this._ts()} [RESULT]\n${JSON.stringify(result, null, 2)}\n\n`;
this._append(this._messagesPath, content);
this._append(this._useMessagesPath, content);
}
/**
* 记录错误
*/
logError(error) {
const line = `${this._ts()} [ERROR] ${error}\n`;
this._append(this._messagesPath, line);
this._append(this._useMessagesPath, line);
}
// ─── Internal ───
_ts() {
return `[${new Date().toISOString()}]`;
}
_append(filePath, content) {
try {
fs.appendFileSync(filePath, content, 'utf-8');
} catch (err) {
console.error(`[ConversationLogger] 写入失败 ${filePath}: ${err.message}`);
}
}
}
module.exports = { ConversationLogger };