Added episodic layer with FTS5 triggers and search

packages/memory-service/src/index.js

@@ -2,6 +2,7 @@ require ('dotenv').config();
 const express = require('express');
 const {getEnv} = require('@nexusai/shared');
 const { getDB } = require('./db');
+const episodic = require('./episodic');
 
 const app = express();
 app.use(express.json());
@@ -16,7 +17,81 @@ app.get('/health', (req, res) => {
     res.json({ service: 'Memory Service', status: 'healthy' });
 });
 
-// Start the server
+/************************************ */
+/********** Session Routes ********** */
+/************************************ */
+
+// Creates a new session with an external ID and optional metadata
+app.post('/sessions', (req, res) => {
+    const {externalId, metadata} = req.body;
+    if (!externalId) {
+        return res.status(400).json({ error: 'externalId is required' });
+    }
+    try {
+        const session = episodic.createSession(externalId, metadata);
+        res.status(201).json(session);
+    } catch (err) {
+        res.status(409).json({ error: 'Session already exists', detail: err.message });
+    }
+});
+
+// Retrieves a session by its internal ID
+app.get('/sessions/:id', (req, res) => {
+  const session = episodic.getSession(req.params.id);
+  if (!session) return res.status(404).json({ error: 'Session not found' });
+  res.json(session);
+});
+
+// Retrieves a session by its external ID
+app.get('/sessions/by-external/:externalId', (req, res) => {
+  const session = episodic.getSessionByExternalId(req.params.externalId);
+  if (!session) return res.status(404).json({ error: 'Session not found' });
+  res.json(session);
+});
+
+
+// Updates the session's updated_at timestamp to now
+app.delete('/sessions/:id', (req, res) => {
+  episodic.deleteSession(req.params.id);
+  res.status(204).send();
+});
+
+
+/************************************* */
+/********** Episodic Routes ********** */
+/************************************* */
+
+app.post('/episodes', (req, res) => {
+  const { sessionId, userMessage, aiResponse, tokenCount, metadata } = req.body;
+  if (!sessionId || !userMessage || !aiResponse) {
+    return res.status(400).json({ error: 'sessionId, userMessage and aiResponse are required' });
+  }
+  const episode = episodic.createEpisode(sessionId, userMessage, aiResponse, tokenCount, metadata);
+  res.status(201).json(episode);
+});
+
+// Search MUST come before /:id — otherwise 'search' gets captured as an id
+app.get('/episodes/search', (req, res) => {
+  const { q, limit = 10 } = req.query;
+  if (!q) return res.status(400).json({ error: 'q (query) parameter is required' });
+  const results = episodic.searchEpisodes(q, Number(limit));
+  res.json(results);
+});
+
+app.get('/episodes/:id', (req, res) => {
+  const episode = episodic.getEpisode(req.params.id);
+  if (!episode) return res.status(404).json({ error: 'Episode not found' });
+  res.json(episode);
+});
+
+app.delete('/episodes/:id', (req, res) => {
+  episodic.deleteEpisode(req.params.id);
+  res.status(204).send();
+});
+
+/********************************** */
+/********** Start Server ********** */
+/********************************** */
 app.listen(PORT, () => {
     console.log(`Memory Service is running on port ${PORT}`);
 });