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I'm 100% going to have to destroy this commit later
This commit is contained in:
perf3ct
721
src/routes/api/llm.ts
Normal file
721
src/routes/api/llm.ts
Normal file
@@ -0,0 +1,721 @@
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import type { Request, Response } from "express";
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import log from "../../services/log.js";
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import options from "../../services/options.js";
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// @ts-ignore
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import { v4 as uuidv4 } from 'uuid';
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import becca from "../../becca/becca.js";
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import vectorStore from "../../services/llm/embeddings/vector_store.js";
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import providerManager from "../../services/llm/embeddings/providers.js";
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import type { Message, ChatCompletionOptions } from "../../services/llm/ai_interface.js";
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// Import this way to prevent immediate instantiation
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import * as aiServiceManagerModule from "../../services/llm/ai_service_manager.js";
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// Define basic interfaces
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interface ChatMessage {
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role: 'user' | 'assistant' | 'system';
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content: string;
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timestamp?: Date;
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}
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interface ChatSession {
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id: string;
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title: string;
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messages: ChatMessage[];
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createdAt: Date;
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lastActive: Date;
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noteContext?: string; // Optional noteId that provides context
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metadata: Record<string, any>;
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}
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interface NoteSource {
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noteId: string;
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title: string;
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content?: string;
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similarity?: number;
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branchId?: string;
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}
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interface SessionOptions {
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title?: string;
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systemPrompt?: string;
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temperature?: number;
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maxTokens?: number;
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model?: string;
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provider?: string;
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contextNoteId?: string;
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}
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// In-memory storage for sessions
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// In a production app, this should be stored in a database
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const sessions = new Map<string, ChatSession>();
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// Flag to track if cleanup timer has been initialized
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let cleanupInitialized = false;
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/**
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* Initialize the cleanup timer if not already running
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* Only call this after database is initialized
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*/
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function initializeCleanupTimer() {
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if (cleanupInitialized) {
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return;
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}
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// Utility function to clean sessions older than 12 hours
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function cleanupOldSessions() {
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const twelveHoursAgo = new Date(Date.now() - 12 * 60 * 60 * 1000);
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for (const [sessionId, session] of sessions.entries()) {
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if (session.lastActive < twelveHoursAgo) {
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sessions.delete(sessionId);
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}
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}
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}
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// Run cleanup every hour
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setInterval(cleanupOldSessions, 60 * 60 * 1000);
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cleanupInitialized = true;
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}
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/**
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* Check if the database is initialized
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*/
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function isDatabaseInitialized(): boolean {
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try {
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options.getOption('initialized');
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return true;
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} catch (error) {
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return false;
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}
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}
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/**
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* Get the AI service manager in a way that doesn't crash at startup
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*/
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function safelyUseAIManager(): boolean {
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// Only use AI manager if database is initialized
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if (!isDatabaseInitialized()) {
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return false;
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}
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// Try to access the manager - will create instance only if needed
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try {
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return aiServiceManagerModule.default.isAnyServiceAvailable();
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} catch (error) {
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log.error(`Error accessing AI service manager: ${error}`);
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return false;
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}
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}
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/**
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* Create a new LLM chat session
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*/
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async function createSession(req: Request, res: Response) {
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try {
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// Initialize cleanup if not already done
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initializeCleanupTimer();
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const options: SessionOptions = req.body || {};
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const title = options.title || 'Chat Session';
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const sessionId = uuidv4();
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const now = new Date();
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// Initial system message if provided
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const messages: ChatMessage[] = [];
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if (options.systemPrompt) {
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messages.push({
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role: 'system',
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content: options.systemPrompt,
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timestamp: now
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});
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}
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// Store session info
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sessions.set(sessionId, {
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id: sessionId,
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title,
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messages,
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createdAt: now,
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lastActive: now,
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noteContext: options.contextNoteId,
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metadata: {
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temperature: options.temperature,
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maxTokens: options.maxTokens,
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model: options.model,
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provider: options.provider
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}
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});
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return {
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id: sessionId,
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title,
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createdAt: now
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};
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} catch (error: any) {
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log.error(`Error creating LLM session: ${error.message || 'Unknown error'}`);
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throw new Error(`Failed to create LLM session: ${error.message || 'Unknown error'}`);
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}
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}
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/**
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* Get session details
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*/
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async function getSession(req: Request, res: Response) {
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try {
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const { sessionId } = req.params;
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// Check if session exists
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const session = sessions.get(sessionId);
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if (!session) {
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throw new Error(`Session with ID ${sessionId} not found`);
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}
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// Return session without internal metadata
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return {
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id: session.id,
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title: session.title,
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createdAt: session.createdAt,
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lastActive: session.lastActive,
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messages: session.messages,
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noteContext: session.noteContext
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};
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} catch (error: any) {
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log.error(`Error getting LLM session: ${error.message || 'Unknown error'}`);
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throw new Error(`Failed to get session: ${error.message || 'Unknown error'}`);
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}
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}
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/**
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* Update session properties
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*/
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async function updateSession(req: Request, res: Response) {
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try {
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const { sessionId } = req.params;
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const updates = req.body || {};
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// Check if session exists
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const session = sessions.get(sessionId);
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if (!session) {
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throw new Error(`Session with ID ${sessionId} not found`);
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}
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// Update allowed fields
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if (updates.title) {
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session.title = updates.title;
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}
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if (updates.noteContext) {
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session.noteContext = updates.noteContext;
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}
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// Update metadata
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if (updates.temperature !== undefined) {
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session.metadata.temperature = updates.temperature;
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}
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if (updates.maxTokens !== undefined) {
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session.metadata.maxTokens = updates.maxTokens;
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}
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if (updates.model) {
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session.metadata.model = updates.model;
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}
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if (updates.provider) {
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session.metadata.provider = updates.provider;
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}
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// Update timestamp
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session.lastActive = new Date();
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return {
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id: session.id,
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title: session.title,
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updatedAt: session.lastActive
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};
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} catch (error: any) {
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log.error(`Error updating LLM session: ${error.message || 'Unknown error'}`);
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throw new Error(`Failed to update session: ${error.message || 'Unknown error'}`);
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}
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}
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/**
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* List active sessions
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*/
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async function listSessions(req: Request, res: Response) {
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try {
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const sessionList = Array.from(sessions.values()).map(session => ({
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id: session.id,
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title: session.title,
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createdAt: session.createdAt,
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lastActive: session.lastActive,
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messageCount: session.messages.length
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}));
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// Sort by last activity (most recent first)
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sessionList.sort((a, b) => b.lastActive.getTime() - a.lastActive.getTime());
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return {
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sessions: sessionList
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};
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} catch (error: any) {
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log.error(`Error listing LLM sessions: ${error.message || 'Unknown error'}`);
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throw new Error(`Failed to list sessions: ${error.message || 'Unknown error'}`);
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}
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}
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/**
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* Delete a session
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*/
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async function deleteSession(req: Request, res: Response) {
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try {
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const { sessionId } = req.params;
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// Check if session exists
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if (!sessions.has(sessionId)) {
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throw new Error(`Session with ID ${sessionId} not found`);
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}
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// Delete session
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sessions.delete(sessionId);
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return {
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success: true,
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message: `Session ${sessionId} deleted successfully`
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};
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} catch (error: any) {
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log.error(`Error deleting LLM session: ${error.message || 'Unknown error'}`);
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throw new Error(`Failed to delete session: ${error.message || 'Unknown error'}`);
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}
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}
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/**
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* Find relevant notes using vector embeddings
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*/
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async function findRelevantNotes(query: string, contextNoteId: string | null = null, limit = 5): Promise<NoteSource[]> {
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try {
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// Only proceed if database is initialized
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if (!isDatabaseInitialized()) {
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log.info('Database not initialized, skipping vector search');
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return [{
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noteId: "root",
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title: "Database not initialized yet",
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content: "Please wait for database initialization to complete."
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}];
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}
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// Get the default embedding provider
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let providerId;
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try {
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// @ts-ignore - embeddingsDefaultProvider exists but might not be in the TypeScript definitions
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providerId = await options.getOption('embeddingsDefaultProvider') || 'openai';
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} catch (error) {
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log.info('Could not get default embedding provider, using mock data');
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return [{
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noteId: "root",
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title: "Embeddings not configured",
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content: "Embedding provider not available"
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}];
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}
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const provider = providerManager.getEmbeddingProvider(providerId);
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if (!provider) {
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log.info(`Embedding provider ${providerId} not found, using mock data`);
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return [{
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||||
noteId: "root",
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||||
title: "Embeddings not available",
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||||
content: "No embedding provider available"
|
||||
}];
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||||
}
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||||
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// Generate embedding for the query
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const embedding = await provider.generateEmbeddings(query);
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||||
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// Find similar notes
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const modelId = 'default'; // Use default model for the provider
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const similarNotes = await vectorStore.findSimilarNotes(
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embedding, providerId, modelId, limit, 0.6 // Lower threshold to find more results
|
||||
);
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||||
// If a context note was provided, check if we should include its children
|
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if (contextNoteId) {
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const contextNote = becca.getNote(contextNoteId);
|
||||
if (contextNote) {
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||||
const childNotes = contextNote.getChildNotes();
|
||||
if (childNotes.length > 0) {
|
||||
// Add relevant children that weren't already included
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||||
const childIds = new Set(childNotes.map(note => note.noteId));
|
||||
const existingIds = new Set(similarNotes.map(note => note.noteId));
|
||||
|
||||
// Find children that aren't already in the similar notes
|
||||
const missingChildIds = Array.from(childIds).filter(id => !existingIds.has(id));
|
||||
|
||||
// Add up to 3 children that weren't already included
|
||||
for (const noteId of missingChildIds.slice(0, 3)) {
|
||||
similarNotes.push({
|
||||
noteId,
|
||||
similarity: 0.75 // Fixed similarity score for context children
|
||||
});
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Get note content for context
|
||||
return await Promise.all(similarNotes.map(async ({ noteId, similarity }) => {
|
||||
const note = becca.getNote(noteId);
|
||||
if (!note) {
|
||||
return {
|
||||
noteId,
|
||||
title: "Unknown Note",
|
||||
similarity
|
||||
};
|
||||
}
|
||||
|
||||
// Get note content
|
||||
let content = '';
|
||||
try {
|
||||
// @ts-ignore - Content can be string or Buffer
|
||||
const noteContent = await note.getContent();
|
||||
content = typeof noteContent === 'string' ? noteContent : noteContent.toString('utf8');
|
||||
|
||||
// Truncate content if it's too long (for performance)
|
||||
if (content.length > 2000) {
|
||||
content = content.substring(0, 2000) + "...";
|
||||
}
|
||||
} catch (e) {
|
||||
log.error(`Error getting content for note ${noteId}: ${e}`);
|
||||
}
|
||||
|
||||
// Get a branch ID for navigation
|
||||
let branchId;
|
||||
try {
|
||||
const branches = note.getBranches();
|
||||
if (branches.length > 0) {
|
||||
branchId = branches[0].branchId;
|
||||
}
|
||||
} catch (e) {
|
||||
log.error(`Error getting branch for note ${noteId}: ${e}`);
|
||||
}
|
||||
|
||||
return {
|
||||
noteId,
|
||||
title: note.title,
|
||||
content,
|
||||
similarity,
|
||||
branchId
|
||||
};
|
||||
}));
|
||||
} catch (error) {
|
||||
log.error(`Error finding relevant notes: ${error}`);
|
||||
// Return empty array on error
|
||||
return [];
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* Build a context string from relevant notes
|
||||
*/
|
||||
function buildContextFromNotes(sources: NoteSource[], query: string): string {
|
||||
console.log("Building context from notes with query:", query);
|
||||
console.log("Sources length:", sources ? sources.length : 0);
|
||||
|
||||
// If no sources are available, just return the query without additional context
|
||||
if (!sources || sources.length === 0) {
|
||||
console.log("No sources available, using just the query");
|
||||
return query || '';
|
||||
}
|
||||
|
||||
const noteContexts = sources
|
||||
.filter(source => source.content) // Only include sources with content
|
||||
.map((source, index) => {
|
||||
// Format each note as a section in the context
|
||||
return `[NOTE ${index + 1}: ${source.title}]\n${source.content || 'No content available'}`;
|
||||
})
|
||||
.join('\n\n');
|
||||
|
||||
if (!noteContexts) {
|
||||
console.log("After filtering, no valid note contexts remain - using just the query");
|
||||
return query || '';
|
||||
}
|
||||
|
||||
// Build a complete context prompt
|
||||
return `I'll provide you with relevant notes from my knowledge base to help answer the question. Please use this information when responding:
|
||||
|
||||
${noteContexts}
|
||||
|
||||
Now, based on the above notes, please answer: ${query}`;
|
||||
}
|
||||
|
||||
/**
|
||||
* Send a message to an LLM chat session and get a response
|
||||
*/
|
||||
async function sendMessage(req: Request, res: Response) {
|
||||
try {
|
||||
const { sessionId, content, temperature, maxTokens, provider, model } = req.body;
|
||||
|
||||
console.log("Received message request:", {
|
||||
sessionId,
|
||||
contentLength: content ? content.length : 0,
|
||||
contentPreview: content ? content.substring(0, 50) + (content.length > 50 ? '...' : '') : 'undefined',
|
||||
temperature,
|
||||
maxTokens,
|
||||
provider,
|
||||
model
|
||||
});
|
||||
|
||||
if (!sessionId) {
|
||||
throw new Error('Session ID is required');
|
||||
}
|
||||
|
||||
if (!content || typeof content !== 'string' || content.trim().length === 0) {
|
||||
throw new Error('Content cannot be empty');
|
||||
}
|
||||
|
||||
// Check if streaming is requested
|
||||
const wantsStream = (req.headers as any)['accept']?.includes('text/event-stream');
|
||||
|
||||
// If client wants streaming, set up SSE response
|
||||
if (wantsStream) {
|
||||
res.setHeader('Content-Type', 'text/event-stream');
|
||||
res.setHeader('Cache-Control', 'no-cache');
|
||||
res.setHeader('Connection', 'keep-alive');
|
||||
|
||||
// Get chat session
|
||||
let session = sessions.get(sessionId);
|
||||
if (!session) {
|
||||
const newSession = await createSession(req, res);
|
||||
if (!newSession) {
|
||||
throw new Error('Failed to create session');
|
||||
}
|
||||
// Add required properties to match ChatSession interface
|
||||
session = {
|
||||
...newSession,
|
||||
messages: [],
|
||||
lastActive: new Date(),
|
||||
metadata: {}
|
||||
};
|
||||
sessions.set(sessionId, session);
|
||||
}
|
||||
|
||||
// Add user message to session
|
||||
const userMessage: ChatMessage = {
|
||||
role: 'user',
|
||||
content: content,
|
||||
timestamp: new Date()
|
||||
};
|
||||
console.log("Created user message:", {
|
||||
role: userMessage.role,
|
||||
contentLength: userMessage.content?.length || 0,
|
||||
contentPreview: userMessage.content?.substring(0, 50) + (userMessage.content?.length > 50 ? '...' : '') || 'undefined'
|
||||
});
|
||||
session.messages.push(userMessage);
|
||||
|
||||
// Get context for query
|
||||
const sources = await findRelevantNotes(content, session.noteContext || null);
|
||||
|
||||
// Format messages for AI with proper type casting
|
||||
const aiMessages: Message[] = [
|
||||
{ role: 'system', content: 'You are a helpful assistant for Trilium Notes. When providing answers, use only the context provided in the notes. If the information is not in the notes, say so.' },
|
||||
{ role: 'user', content: buildContextFromNotes(sources, content) }
|
||||
];
|
||||
|
||||
// Ensure we're not sending empty content
|
||||
console.log("Final message content length:", aiMessages[1].content.length);
|
||||
console.log("Final message content preview:", aiMessages[1].content.substring(0, 100));
|
||||
|
||||
try {
|
||||
// Send initial SSE message with session info
|
||||
const sourcesForResponse = sources.map(({ noteId, title, similarity, branchId }) => ({
|
||||
noteId,
|
||||
title,
|
||||
similarity: similarity ? Math.round(similarity * 100) / 100 : undefined,
|
||||
branchId
|
||||
}));
|
||||
|
||||
res.write(`data: ${JSON.stringify({
|
||||
type: 'init',
|
||||
session: {
|
||||
id: sessionId,
|
||||
messages: session.messages.slice(0, -1), // Don't include the new message yet
|
||||
sources: sourcesForResponse
|
||||
}
|
||||
})}\n\n`);
|
||||
|
||||
// Get AI response with streaming enabled
|
||||
const aiResponse = await aiServiceManagerModule.default.generateChatCompletion(aiMessages, {
|
||||
temperature,
|
||||
maxTokens,
|
||||
model: provider ? `${provider}:${model}` : model,
|
||||
stream: true
|
||||
});
|
||||
|
||||
if (aiResponse.stream) {
|
||||
// Create an empty assistant message
|
||||
const assistantMessage: ChatMessage = {
|
||||
role: 'assistant',
|
||||
content: '',
|
||||
timestamp: new Date()
|
||||
};
|
||||
session.messages.push(assistantMessage);
|
||||
|
||||
// Stream the response chunks
|
||||
await aiResponse.stream(async (chunk) => {
|
||||
if (chunk.text) {
|
||||
// Update the message content
|
||||
assistantMessage.content += chunk.text;
|
||||
|
||||
// Send chunk to client
|
||||
res.write(`data: ${JSON.stringify({
|
||||
type: 'chunk',
|
||||
text: chunk.text,
|
||||
done: chunk.done
|
||||
})}\n\n`);
|
||||
}
|
||||
|
||||
if (chunk.done) {
|
||||
// Send final message with complete response
|
||||
res.write(`data: ${JSON.stringify({
|
||||
type: 'done',
|
||||
session: {
|
||||
id: sessionId,
|
||||
messages: session.messages,
|
||||
sources: sourcesForResponse
|
||||
}
|
||||
})}\n\n`);
|
||||
|
||||
res.end();
|
||||
}
|
||||
});
|
||||
|
||||
return; // Early return for streaming
|
||||
} else {
|
||||
// Fallback for non-streaming response
|
||||
const assistantMessage: ChatMessage = {
|
||||
role: 'assistant',
|
||||
content: aiResponse.text,
|
||||
timestamp: new Date()
|
||||
};
|
||||
session.messages.push(assistantMessage);
|
||||
|
||||
// Send complete response
|
||||
res.write(`data: ${JSON.stringify({
|
||||
type: 'done',
|
||||
session: {
|
||||
id: sessionId,
|
||||
messages: session.messages,
|
||||
sources: sourcesForResponse
|
||||
}
|
||||
})}\n\n`);
|
||||
|
||||
res.end();
|
||||
return;
|
||||
}
|
||||
} catch (error: any) {
|
||||
// Send error in streaming format
|
||||
res.write(`data: ${JSON.stringify({
|
||||
type: 'error',
|
||||
error: `AI service error: ${error.message}`
|
||||
})}\n\n`);
|
||||
|
||||
res.end();
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
// Non-streaming API continues with normal JSON response...
|
||||
|
||||
// Get chat session
|
||||
let session = sessions.get(sessionId);
|
||||
if (!session) {
|
||||
const newSession = await createSession(req, res);
|
||||
if (!newSession) {
|
||||
throw new Error('Failed to create session');
|
||||
}
|
||||
// Add required properties to match ChatSession interface
|
||||
session = {
|
||||
...newSession,
|
||||
messages: [],
|
||||
lastActive: new Date(),
|
||||
metadata: {}
|
||||
};
|
||||
sessions.set(sessionId, session);
|
||||
}
|
||||
|
||||
// Add user message to session
|
||||
const userMessage: ChatMessage = {
|
||||
role: 'user',
|
||||
content: content,
|
||||
timestamp: new Date()
|
||||
};
|
||||
console.log("Created user message:", {
|
||||
role: userMessage.role,
|
||||
contentLength: userMessage.content?.length || 0,
|
||||
contentPreview: userMessage.content?.substring(0, 50) + (userMessage.content?.length > 50 ? '...' : '') || 'undefined'
|
||||
});
|
||||
session.messages.push(userMessage);
|
||||
|
||||
// Get context for query
|
||||
const sources = await findRelevantNotes(content, session.noteContext || null);
|
||||
|
||||
// Format messages for AI with proper type casting
|
||||
const aiMessages: Message[] = [
|
||||
{ role: 'system', content: 'You are a helpful assistant for Trilium Notes. When providing answers, use only the context provided in the notes. If the information is not in the notes, say so.' },
|
||||
{ role: 'user', content: buildContextFromNotes(sources, content) }
|
||||
];
|
||||
|
||||
// Ensure we're not sending empty content
|
||||
console.log("Final message content length:", aiMessages[1].content.length);
|
||||
console.log("Final message content preview:", aiMessages[1].content.substring(0, 100));
|
||||
|
||||
try {
|
||||
// Get AI response using the safe accessor methods
|
||||
const aiResponse = await aiServiceManagerModule.default.generateChatCompletion(aiMessages, {
|
||||
temperature,
|
||||
maxTokens,
|
||||
model: provider ? `${provider}:${model}` : model,
|
||||
stream: false
|
||||
});
|
||||
|
||||
// Add assistant message to session
|
||||
const assistantMessage: ChatMessage = {
|
||||
role: 'assistant',
|
||||
content: aiResponse.text,
|
||||
timestamp: new Date()
|
||||
};
|
||||
session.messages.push(assistantMessage);
|
||||
|
||||
// Format sources for the response (without content to reduce payload size)
|
||||
const sourcesForResponse = sources.map(({ noteId, title, similarity, branchId }) => ({
|
||||
noteId,
|
||||
title,
|
||||
similarity: similarity ? Math.round(similarity * 100) / 100 : undefined,
|
||||
branchId
|
||||
}));
|
||||
|
||||
return {
|
||||
id: sessionId,
|
||||
messages: session.messages,
|
||||
sources: sourcesForResponse,
|
||||
provider: aiResponse.provider,
|
||||
model: aiResponse.model
|
||||
};
|
||||
} catch (error: any) {
|
||||
log.error(`AI service error: ${error.message}`);
|
||||
throw new Error(`AI service error: ${error.message}`);
|
||||
}
|
||||
} catch (error: any) {
|
||||
log.error(`Error sending message: ${error.message}`);
|
||||
throw error;
|
||||
}
|
||||
}
|
||||
|
||||
export default {
|
||||
createSession,
|
||||
getSession,
|
||||
updateSession,
|
||||
listSessions,
|
||||
deleteSession,
|
||||
sendMessage
|
||||
};
|
||||
Reference in New Issue
Block a user