298 lines
13 KiB
JavaScript
298 lines
13 KiB
JavaScript
const ToolExecutor = require('./toolExecutor');
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const arkChatService = require('./arkChatService');
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const db = require('../db');
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function normalizeTextForSpeech(text) {
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return (text || '')
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.replace(/^#{1,6}\s*/gm, '')
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.replace(/\*\*([^*]*)\*\*/g, '$1')
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.replace(/__([^_]*)__/g, '$1')
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.replace(/\*([^*]+)\*/g, '$1')
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.replace(/_([^_]+)_/g, '$1')
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.replace(/~~([^~]*)~~/g, '$1')
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.replace(/`{1,3}[^`]*`{1,3}/g, '')
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.replace(/^[-*]{3,}\s*$/gm, '')
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.replace(/^>\s*/gm, '')
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.replace(/!\[[^\]]*\]\([^)]*\)/g, '')
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.replace(/\[([^\]]*)\]\([^)]*\)/g, '$1')
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.replace(/^[\s]*[-*+]\s+/gm, ' ')
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.replace(/^[\s]*\d+[.)]\s+/gm, ' ')
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.replace(/---\s*来源[：:]/g, '来源：')
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.replace(/\r/g, ' ')
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.replace(/\n{2,}/g, '。')
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.replace(/\n/g, ' ')
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.replace(/。{2,}/g, '。')
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.replace(/([！？；，])\1+/g, '$1')
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.replace(/([。！？；，])\s*([。！？；，])/g, '$2')
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.replace(/\s+/g, ' ')
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.trim();
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}
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function splitTextForSpeech(text, maxLen = 180) {
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const content = normalizeTextForSpeech(text);
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if (!content) return [];
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if (content.length <= maxLen) return [content];
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const chunks = [];
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let remaining = content;
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while (remaining.length > maxLen) {
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const currentMaxLen = chunks.length === 0 ? Math.min(90, maxLen) : maxLen;
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let splitIndex = Math.max(
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remaining.lastIndexOf('。', currentMaxLen),
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remaining.lastIndexOf('！', currentMaxLen),
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remaining.lastIndexOf('？', currentMaxLen),
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remaining.lastIndexOf('；', currentMaxLen),
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remaining.lastIndexOf('，', currentMaxLen),
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remaining.lastIndexOf(',', currentMaxLen)
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);
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if (splitIndex < Math.floor(currentMaxLen / 2)) {
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splitIndex = currentMaxLen;
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} else {
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splitIndex += 1;
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}
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chunks.push(remaining.slice(0, splitIndex).trim());
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remaining = remaining.slice(splitIndex).trim();
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}
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if (remaining) chunks.push(remaining);
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return chunks.filter(Boolean);
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}
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function estimateSpeechDurationMs(text) {
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const plainText = normalizeTextForSpeech(text).replace(/\s+/g, '');
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const length = plainText.length;
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return Math.max(4000, Math.min(60000, length * 180));
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}
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function buildDirectRouteMessages(session, context, userText) {
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const messages = [];
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const systemPrompt = [
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'你是语音前置路由器，只负责判断当前用户问题应该走哪条链路。',
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'你必须只输出一个 JSON 对象，不要输出解释、代码块或额外文本。',
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'允许的 route 只有：chat、search_knowledge、query_weather、query_order、get_current_time、calculate。',
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'规则如下：',
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'1. 企业产品、功能、政策、售后、专业说明、品牌官方信息 -> search_knowledge。',
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'2. 天气 -> query_weather。',
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'3. 订单状态 -> query_order。',
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'4. 当前时间、日期、星期 -> get_current_time。',
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'5. 明确的数学计算 -> calculate。',
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'6. 闲聊、问候、开放式泛化交流 -> chat。',
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'输出格式示例：{"route":"chat","args":{},"reply":""}',
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'如果 route=search_knowledge，args 中必须包含 query。',
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'如果 route=query_weather，args 中必须包含 city。',
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'如果 route=query_order，args 中必须包含 order_id。',
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'如果 route=calculate，args 中必须包含 expression。',
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`当前助手设定：${session.systemRole || '你是一个友善的智能助手。'} ${session.speakingStyle || '请使用温和、清晰的口吻。'}`,
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].join('\n');
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messages.push({ role: 'system', content: systemPrompt });
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(context || []).slice(-6).forEach((item) => {
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if (item && item.role && item.content) {
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messages.push({ role: item.role, content: item.content });
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}
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});
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messages.push({ role: 'user', content: userText });
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return messages;
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}
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function buildDirectChatMessages(session, context, userText) {
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const messages = [];
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const systemPrompt = [
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session.systemRole || '你是一个友善的智能助手。',
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session.speakingStyle || '请使用温和、清晰的口吻。',
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'这是语音对话场景，请直接给出自然、完整、适合朗读的中文回复。',
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'如果不是基于知识库或工具结果，就不要冒充官方结论。',
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].join('\n');
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messages.push({ role: 'system', content: systemPrompt });
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(context || []).slice(-10).forEach((item) => {
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if (item && item.role && item.content) {
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messages.push({ role: item.role, content: item.content });
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}
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});
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messages.push({ role: 'user', content: userText });
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return messages;
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}
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function hasKnowledgeKeyword(text) {
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return /(系统|平台|产品|功能|介绍|说明|规则|流程|步骤|配置|接入|开通|操作|怎么用|如何用|适合谁|区别|价格|费用|政策|售后|文档|资料|方案|一成系统)/.test(text || '');
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}
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function isKnowledgeFollowUp(text) {
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return /^(这个|那个|它|该系统|这个系统|那个系统|这个功能|那个功能|这个产品|那个产品|详细|详细说说|详细查一下|展开说说|继续说|继续讲|怎么用|怎么操作|怎么配置|适合谁|有什么区别|费用多少|价格多少|怎么申请|怎么开通|是什么|什么意思)/.test((text || '').trim());
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}
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function shouldForceKnowledgeRoute(userText, context = []) {
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const text = (userText || '').trim();
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if (!text) return false;
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if (hasKnowledgeKeyword(text)) return true;
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if (!isKnowledgeFollowUp(text)) return false;
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const recentContextText = (Array.isArray(context) ? context : [])
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.slice(-6)
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.map((item) => String(item?.content || '').trim())
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.join('\n');
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return hasKnowledgeKeyword(recentContextText);
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}
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function withHandoffSummary(session, context) {
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const summary = String(session?.handoffSummary || '').trim();
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if (!summary || session?.handoffSummaryUsed) {
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return context;
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}
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return [
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{ role: 'assistant', content: `会话交接摘要：${summary}` },
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...(Array.isArray(context) ? context : []),
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];
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}
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function parseDirectRouteDecision(content, userText) {
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const raw = (content || '').trim();
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const jsonText = raw.replace(/^```json\s*/i, '').replace(/^```\s*/i, '').replace(/```$/i, '').trim();
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const start = jsonText.indexOf('{');
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const end = jsonText.lastIndexOf('}');
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const candidate = start >= 0 && end > start ? jsonText.slice(start, end + 1) : jsonText;
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try {
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const parsed = JSON.parse(candidate);
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const route = parsed.route;
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const args = parsed.args && typeof parsed.args === 'object' ? parsed.args : {};
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if (route === 'chat') return { route: 'chat', args: {} };
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if (route === 'search_knowledge') return { route: 'search_knowledge', args: { query: args.query || userText } };
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if (route === 'query_weather' && args.city) return { route: 'query_weather', args: { city: args.city } };
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if (route === 'query_order' && args.order_id) return { route: 'query_order', args: { order_id: args.order_id } };
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if (route === 'get_current_time') return { route: 'get_current_time', args: {} };
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if (route === 'calculate' && args.expression) return { route: 'calculate', args: { expression: args.expression } };
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} catch (error) {
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console.warn('[NativeVoice] route JSON parse failed:', error.message, 'raw=', raw);
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}
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return { route: 'search_knowledge', args: { query: userText } };
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}
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function getRuleBasedDirectRouteDecision(userText) {
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const text = (userText || '').trim();
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if (!text) return { route: 'chat', args: {} };
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if (/(几点|几号|日期|星期|周几|现在时间|当前时间)/.test(text)) return { route: 'get_current_time', args: {} };
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if (/(天气|气温|下雨|晴天|阴天|温度)/.test(text)) {
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return { route: 'query_weather', args: { city: text.replace(/.*?(北京|上海|广州|深圳|杭州|成都|重庆|武汉|西安|南京|苏州|天津|长沙|郑州|青岛|宁波|无锡)/, '$1') || '北京' } };
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}
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if (/(订单|物流|快递|单号)/.test(text)) return { route: 'query_order', args: { order_id: text } };
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if (/^[\d\s+\-*/().=%]+$/.test(text) || /(等于多少|帮我算|计算一下|算一下)/.test(text)) {
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return { route: 'calculate', args: { expression: text.replace(/(帮我算|计算一下|算一下|等于多少)/g, '').trim() || text } };
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}
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if (/^(喂|你好|您好|嗨|哈喽|hello|hi|在吗|在不在|早上好|中午好|下午好|晚上好|早安|晚安|谢谢|感谢|再见|拜拜|嗯|哦|好的|对|是的|没有了|没事了|可以了|行|OK|ok)[，,！。？?~～\s]*[啊呀吧呢哦嗯嘛哈的了]*[！。？?~～]*$/.test(text)) {
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return { route: 'chat', args: {} };
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}
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if (/^(喂[，,\s]*)?(你好|您好)[，,！。？?\s]*(在吗|请问)?[！。？?]*$/.test(text)) {
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return { route: 'chat', args: {} };
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}
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return { route: 'search_knowledge', args: { query: text } };
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}
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function extractToolResultText(toolName, toolResult) {
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if (!toolResult) return '';
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if (toolName === 'search_knowledge') {
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if (toolResult.errorType === 'timeout') {
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return '知识库查询超时了，请稍后重试，或换一种更具体的问法再试。';
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}
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if (toolResult.errorType === 'not_configured') {
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return '知识库当前未配置完成，请先检查知识库配置。';
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}
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if (toolResult.results && Array.isArray(toolResult.results)) {
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return toolResult.results.map((item) => item.content || JSON.stringify(item)).join('\n');
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}
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if (typeof toolResult === 'string') return toolResult;
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if (toolResult.error) return toolResult.error;
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}
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if (toolName === 'query_weather' && !toolResult.error) return `${toolResult.city}今天${toolResult.weather}，气温${toolResult.temp}，湿度${toolResult.humidity}，${toolResult.wind}。${toolResult.tips || ''}`.trim();
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if (toolName === 'query_order' && !toolResult.error) return `订单${toolResult.order_id}当前状态是${toolResult.status}，预计送达时间${toolResult.estimated_delivery}，快递单号${toolResult.tracking_number}。`;
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if (toolName === 'get_current_time' && !toolResult.error) return `现在是${toolResult.datetime}，${toolResult.weekday}。`;
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if (toolName === 'calculate' && !toolResult.error) return `${toolResult.expression} 的计算结果是 ${toolResult.formatted}。`;
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if (toolResult.error) return toolResult.error;
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return typeof toolResult === 'string' ? toolResult : JSON.stringify(toolResult);
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}
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async function resolveReply(sessionId, session, text) {
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const baseContext = await db.getHistoryForLLM(sessionId, 20).catch(() => []);
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const context = withHandoffSummary(session, baseContext);
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const originalText = text.trim();
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let routeDecision = getRuleBasedDirectRouteDecision(text.trim());
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if (routeDecision.route === 'chat' && shouldForceKnowledgeRoute(text.trim(), context)) {
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routeDecision = { route: 'search_knowledge', args: { query: text.trim() } };
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}
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let replyText = '';
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let source = 'voice_bot';
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let toolName = null;
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let responseMeta = {
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route: routeDecision.route,
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original_text: originalText,
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};
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if (routeDecision.route === 'chat') {
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session.handoffSummaryUsed = true;
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return {
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delivery: 'upstream_chat',
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speechText: '',
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ragItems: [],
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source,
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toolName,
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routeDecision,
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responseMeta,
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};
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} else {
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toolName = routeDecision.route;
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source = 'voice_tool';
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const toolArgs = toolName === 'search_knowledge'
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? { ...(routeDecision.args || {}), response_mode: 'snippet' }
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: routeDecision.args;
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const toolResult = await ToolExecutor.execute(routeDecision.route, toolArgs, context);
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replyText = extractToolResultText(toolName, toolResult);
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responseMeta = {
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...responseMeta,
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tool_name: toolName,
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tool_args: toolArgs || {},
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source: toolResult?.source || null,
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original_query: toolResult?.original_query || routeDecision.args?.query || originalText,
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rewritten_query: toolResult?.rewritten_query || null,
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hit: typeof toolResult?.hit === 'boolean' ? toolResult.hit : null,
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reason: toolResult?.reason || null,
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error_type: toolResult?.errorType || null,
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latency_ms: toolResult?.latency_ms || null,
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};
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const ragItems = toolName === 'search_knowledge'
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? (toolResult?.hit && Array.isArray(toolResult?.results)
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? toolResult.results
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.filter((item) => item && item.content)
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.map((item) => ({
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title: item.title || '知识库结果',
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content: item.content,
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}))
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: [])
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: (!toolResult?.error && replyText
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? [{ title: `${toolName}结果`, content: replyText }]
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: []);
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if (ragItems.length > 0) {
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session.handoffSummaryUsed = true;
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return {
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delivery: 'external_rag',
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speechText: '',
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ragItems,
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source,
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toolName,
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routeDecision,
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responseMeta,
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};
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}
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}
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const speechText = normalizeTextForSpeech(replyText);
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session.handoffSummaryUsed = true;
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if (!speechText) {
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return { delivery: 'local_tts', speechText: '', ragItems: [], source, toolName, routeDecision, responseMeta };
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}
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return { delivery: 'local_tts', speechText, ragItems: [], source, toolName, routeDecision, responseMeta };
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}
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module.exports = {
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getRuleBasedDirectRouteDecision,
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normalizeTextForSpeech,
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splitTextForSpeech,
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estimateSpeechDurationMs,
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shouldForceKnowledgeRoute,
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resolveReply,
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};
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