67 lines
2.7 KiB
JavaScript
67 lines
2.7 KiB
JavaScript
'use strict';
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const crypto = require('crypto');
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const prom = require('./prom');
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// Phase 0：验签 -> 去重 -> 只处理 contact 的 message.created -> 回一条占位消息。
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// Phase 1 会把这里替换成 bridge AI 编排。
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function verifySignature(rawBody, secret, signature) {
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if (!secret || !signature) return false;
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const expected = 'sha256=' + crypto.createHmac('sha256', secret).update(rawBody).digest('hex');
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const a = Buffer.from(String(signature));
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const b = Buffer.from(expected);
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return a.length === b.length && crypto.timingSafeEqual(a, b);
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}
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function createLibreDeskWebhook(cfg, deps = {}) {
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const client = deps.client || require('./libredesk').createLibreDeskClient(cfg);
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const agent = deps.agent || null;
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const seen = new Map();
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const TTL_MS = 10 * 60 * 1000;
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function markSeen(uuid) {
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const now = Date.now();
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for (const [key, ts] of seen) if (now - ts > TTL_MS) seen.delete(key);
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if (seen.has(uuid)) return false;
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seen.set(uuid, now);
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return true;
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}
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async function handle(body) {
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if (!body || body.event !== 'message.created') return;
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const msg = body.payload || {};
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prom.inc('bridge_webhook_events_total', { event: body.event || 'unknown' });
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if (msg.sender_type !== 'contact' || msg.private) return;
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if (!msg.uuid || !msg.conversation_uuid) return;
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if (!markSeen(msg.uuid)) return;
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const conv = await client.getConversation(msg.conversation_uuid);
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const inboxId = String(conv && conv.inbox_id);
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const allowed = cfg.libredeskWebhookInboxIds || [];
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if (allowed.length && !allowed.includes(inboxId)) {
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console.log(JSON.stringify({ ts: new Date().toISOString(), webhook: 'ignored_inbox', inbox: inboxId, conversation: msg.conversation_uuid }));
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return;
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}
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const text = String(msg.text_content || msg.content || '').trim();
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console.log(JSON.stringify({ ts: new Date().toISOString(), webhook: 'message.created', inbox: inboxId, conversation: msg.conversation_uuid, message: msg.uuid, text: text.slice(0, 120) }));
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if (agent) {
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try {
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await agent.run(conv, msg);
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} catch (err) {
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console.error(JSON.stringify({ ts: new Date().toISOString(), webhook: 'agent_error', conversation: msg.conversation_uuid, error: err.message }));
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}
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} else {
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// 没有 agent 时的占位回复（仅用于链路调试）
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const reply = `Bridge Phase 0 已收到：${text || '(空消息)'}`;
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await client.sendMessage(msg.conversation_uuid, reply, { echoId: `bridge-p0-${msg.uuid}` });
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console.log(JSON.stringify({ ts: new Date().toISOString(), webhook: 'replied', conversation: msg.conversation_uuid, reply }));
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}
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}
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return { verifySignature, handle };
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}
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module.exports = { createLibreDeskWebhook, verifySignature };
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