session start works
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aodulov
254
backend/src/ws/index.ts
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254
backend/src/ws/index.ts
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@@ -0,0 +1,254 @@
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import { WebSocketServer, WebSocket } from 'ws';
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import { LLMService } from '../services/LLMService';
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import { v4 as uuidv4 } from 'uuid';
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// Types from the frontend
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interface SemanticDesire {
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title: string;
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rawInputs: string[];
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}
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interface Decision {
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goTos: SemanticDesire[];
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alsoGoods: SemanticDesire[];
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considerables: SemanticDesire[];
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noGoes: SemanticDesire[];
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}
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// Define the SessionState enum
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export enum SessionState {
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SETUP = 'SETUP',
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GATHERING = 'GATHERING',
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HARMONIZING = 'HARMONIZING',
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FINAL = 'FINAL',
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}
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// A map to hold session data, including clients and the latest state
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interface SessionData {
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state: SessionState; // Current phase of the session
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topic: string | null; // The topic of the session
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expectedResponses: number; // The number set by the first user in State A.
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submittedCount: number; // The current count of submitted responses.
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responses: Map<string, any>; // Stores the submitted desire objects. Map<ClientID, ResponseData>
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clients: Map<string, WebSocket>; // Maps the persistent Client ID to their active WebSocket connection object.
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finalResult: any | null; // The result returned by the LLM.
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}
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export const sessions = new Map<string, SessionData>();
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// Initialize LLM Service (API key from environment)
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const llmService = new LLMService(process.env.GEMINI_API_KEY || '');
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export const broadcastToSession = (sessionId: string, message: any, excludeClientId: string | null = null) => {
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const sessionData = sessions.get(sessionId);
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if (sessionData) {
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sessionData.clients.forEach((client, clientId) => {
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if (clientId !== excludeClientId && client.readyState === WebSocket.OPEN) {
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client.send(JSON.stringify(message));
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}
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});
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}
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};
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export const createWebSocketServer = (server: any) => {
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const wss = new WebSocketServer({ server });
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wss.on('connection', (ws, req) => {
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const url = new URL(req.url || '', `http://${req.headers.host}`);
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const sessionId = url.pathname.split('/').pop();
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if (!sessionId) {
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ws.close(1008, 'Invalid session ID');
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return;
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}
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if (!sessions.has(sessionId)) {
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sessions.set(sessionId, {
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state: SessionState.SETUP,
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topic: null,
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expectedResponses: 0,
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submittedCount: 0,
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responses: new Map<string, any>(),
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clients: new Map<string, WebSocket>(),
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finalResult: null,
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});
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}
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const sessionData = sessions.get(sessionId)!;
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console.log(`Client connecting to session: ${sessionId}`);
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ws.on('message', async (message) => {
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const parsedMessage = JSON.parse(message.toString());
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const { type, clientId, payload } = parsedMessage;
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if (!clientId) {
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console.error(`Received message without clientId in session ${sessionId}. Type: ${type}`);
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ws.send(JSON.stringify({ type: 'ERROR', payload: { message: 'clientId is required' } }));
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return;
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}
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if (!sessionData.clients.has(clientId)) {
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sessionData.clients.set(clientId, ws);
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console.log(`Client ${clientId} registered for session: ${sessionId}. Total clients: ${sessionData.clients.size}`);
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ws.send(JSON.stringify({ type: 'STATE_UPDATE', payload: { session: sessionData } }));
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}
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console.log(`Received message from ${clientId} in session ${sessionId}:`, type);
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switch (type) {
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case 'REGISTER_CLIENT':
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break;
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case 'SETUP_SESSION':
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if (sessionData.state === SessionState.SETUP) {
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const { expectedResponses, topic } = payload;
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if (typeof expectedResponses !== 'number' || expectedResponses <= 0) {
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ws.send(JSON.stringify({ type: 'ERROR', payload: { message: 'Invalid expectedResponses' } }));
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return;
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}
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sessionData.expectedResponses = expectedResponses;
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sessionData.topic = topic || 'Untitled Session';
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sessionData.state = SessionState.GATHERING;
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broadcastToSession(sessionId, { type: 'STATE_UPDATE', payload: { session: sessionData } });
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console.log(`Session ${sessionId} moved to GATHERING with topic "${sessionData.topic}" and ${expectedResponses} expected responses.`);
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} else {
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ws.send(JSON.stringify({ type: 'ERROR', payload: { message: `Session is not in SETUP state. Current state: ${sessionData.state}` } }));
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}
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break;
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case 'SUBMIT_RESPONSE':
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if (sessionData.state === SessionState.GATHERING) {
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if (sessionData.responses.has(clientId)) {
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ws.send(JSON.stringify({ type: 'ERROR', payload: { message: 'You have already submitted a response for this session.' } }));
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return;
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}
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sessionData.responses.set(clientId, payload.response);
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sessionData.submittedCount++;
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console.log(`Client ${clientId} submitted response. Submitted count: ${sessionData.submittedCount}/${sessionData.expectedResponses}`);
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if (sessionData.submittedCount === sessionData.expectedResponses) {
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sessionData.state = SessionState.HARMONIZING;
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broadcastToSession(sessionId, { type: 'STATE_UPDATE', payload: { session: sessionData } });
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console.log(`Session ${sessionId} moved to HARMONIZING. Triggering LLM analysis.`);
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try {
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const allDesires = Array.from(sessionData.responses.values());
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const canonicalMap = await llmService.analyzeDesires(allDesires);
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const semanticDesiresMap = new Map<string, SemanticDesire>();
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for (const originalDesire in canonicalMap) {
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const canonicalName = canonicalMap[originalDesire];
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if (!semanticDesiresMap.has(canonicalName)) {
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semanticDesiresMap.set(canonicalName, { title: canonicalName, rawInputs: [] });
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}
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semanticDesiresMap.get(canonicalName)?.rawInputs.push(originalDesire);
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}
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const decision: Decision = {
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goTos: [],
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alsoGoods: [],
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considerables: [],
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noGoes: [],
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};
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const participantIds = Array.from(sessionData.responses.keys());
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semanticDesiresMap.forEach(semanticDesire => {
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let isNoGo = false;
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let allWant = true;
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let atLeastOneWant = false;
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let allAcceptOrWant = true;
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for (const pId of participantIds) {
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const participantDesireSet = sessionData.responses.get(pId);
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if (!participantDesireSet) continue;
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const participantWants = new Set(participantDesireSet.wants.map((d: string) => canonicalMap[d] || d));
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const participantAccepts = new Set(participantDesireSet.accepts.map((d: string) => canonicalMap[d] || d));
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const participantNoGoes = new Set(participantDesireSet.noGoes.map((d: string) => canonicalMap[d] || d));
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const canonicalTitle = semanticDesire.title;
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if (participantNoGoes.has(canonicalTitle)) {
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isNoGo = true;
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break;
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}
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if (!participantWants.has(canonicalTitle)) {
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allWant = false;
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}
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if (participantWants.has(canonicalTitle)) {
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atLeastOneWant = true;
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}
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if (!participantWants.has(canonicalTitle) && !participantAccepts.has(canonicalTitle)) {
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allAcceptOrWant = false;
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}
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}
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if (isNoGo) {
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decision.noGoes.push(semanticDesire);
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} else if (allWant) {
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decision.goTos.push(semanticDesire);
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} else if (atLeastOneWant && allAcceptOrWant) {
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decision.alsoGoods.push(semanticDesire);
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} else if (atLeastOneWant || !allAcceptOrWant) {
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decision.considerables.push(semanticDesire);
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}
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});
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sessionData.finalResult = decision;
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sessionData.state = SessionState.FINAL;
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broadcastToSession(sessionId, { type: 'STATE_UPDATE', payload: { session: sessionData } });
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console.log(`Analysis complete for session ${sessionId}. Result:`, decision);
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} catch (error) {
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console.error(`Error during analysis for session ${sessionId}:`, error);
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sessionData.state = SessionState.GATHERING;
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broadcastToSession(sessionId, { type: 'STATE_UPDATE', payload: { session: sessionData } });
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}
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} else {
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broadcastToSession(sessionId, { type: 'STATE_UPDATE', payload: { session: sessionData } });
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}
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} else {
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ws.send(JSON.stringify({ type: 'ERROR', payload: { message: `Session is not in GATHERING state. Current state: ${sessionData.state}` } }));
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}
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break;
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default:
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console.warn(`Unknown message type: ${type} from client ${clientId} in session ${sessionId}`);
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ws.send(JSON.stringify({ type: 'ERROR', payload: { message: `Unknown message type: ${type}` } }));
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break;
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}
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});
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ws.on('close', () => {
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let disconnectedClientId: string | null = null;
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for (const [clientId, clientWs] of sessionData.clients.entries()) {
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if (clientWs === ws) {
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disconnectedClientId = clientId;
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break;
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}
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}
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if (disconnectedClientId) {
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sessionData.clients.delete(disconnectedClientId);
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console.log(`Client ${disconnectedClientId} disconnected from session: ${sessionId}. Remaining clients: ${sessionData.clients.size}`);
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} else {
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console.log(`An unregistered client disconnected from session: ${sessionId}.`);
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}
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if (sessionData.clients.size === 0) {
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sessions.delete(sessionId);
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console.log(`Session ${sessionId} closed and state cleared.`);
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}
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});
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ws.on('error', (error) => {
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console.error(`WebSocket error in session ${sessionId}:`, error);
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});
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});
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return wss;
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};
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