chore: first commit

src/server.ts

@@ -1,11 +1,13 @@
-import express, { Request, Response, RequestHandler } from 'express';
+import express, {Request, Response, RequestHandler} from 'express';
 import cors from 'cors';
-import { EventEmitter } from 'events';
-import { getResponse } from './agent';
+import {EventEmitter} from 'events';
+import {getResponse} from './agent';
 import {StepAction, StreamMessage} from './types';
-import { TrackerContext } from './types/tracker';
+import {TrackerContext} from './types/tracker';
 import fs from 'fs/promises';
 import path from 'path';
+import {TokenTracker} from "./utils/token-tracker";
+import {ActionTracker} from "./utils/action-tracker";
 
 const app = express();
 const port = process.env.PORT || 3000;
@@ -37,36 +39,6 @@ async function checkRequestExists(requestId: string): Promise<boolean> {
   }
 }
 
-// SSE endpoint with request validation
-app.get('/api/v1/stream/:requestId', (async (req: Request, res: StreamResponse) => {
-  const requestId = req.params.requestId;
-
-  // Check if request exists before setting up SSE
-  const exists = await checkRequestExists(requestId);
-  if (!exists) {
-    res.status(404).json({ error: 'Request ID not found' });
-    return;
-  }
-
-  res.setHeader('Content-Type', 'text/event-stream');
-  res.setHeader('Cache-Control', 'no-cache');
-  res.setHeader('Connection', 'keep-alive');
-
-  const listener = (data: StreamMessage) => {
-    res.write(`data: ${JSON.stringify(data)}\n\n`);
-  };
-
-  eventEmitter.on(`progress-${requestId}`, listener);
-
-  // Handle client disconnection
-  req.on('close', () => {
-    eventEmitter.removeListener(`progress-${requestId}`, listener);
-  });
-
-  // Send initial connection confirmation
-  res.write(`data: ${JSON.stringify({ type: 'connected', requestId })}\n\n`);
-}) as RequestHandler);
-
 function createProgressEmitter(requestId: string, budget: number | undefined, context: TrackerContext) {
   return () => {
     const state = context.actionTracker.getState();
@@ -78,41 +50,131 @@ function createProgressEmitter(requestId: string, budget: number | undefined, co
 
     eventEmitter.emit(`progress-${requestId}`, {
       type: 'progress',
-      data: { ...state.thisStep, totalStep: state.totalStep },
+      data: {...state.thisStep, totalStep: state.totalStep},
       step: state.totalStep,
-      budget: budgetInfo
+      budget: budgetInfo,
+      trackers: {
+        tokenUsage: context.tokenTracker.getTotalUsage(),
+        actionState: context.actionTracker.getState()
+      }
     });
   };
 }
 
+function cleanup(requestId: string) {
+  const context = trackers.get(requestId);
+  if (context) {
+    context.actionTracker.removeAllListeners();
+    context.tokenTracker.removeAllListeners();
+    trackers.delete(requestId);
+  }
+}
+
+function emitTrackerUpdate(requestId: string, context: TrackerContext) {
+  const trackerData = {
+    tokenUsage: context.tokenTracker.getTotalUsage(),
+    tokenBreakdown: context.tokenTracker.getUsageBreakdown(),
+    actionState: context.actionTracker.getState().thisStep,
+    step: context.actionTracker.getState().totalStep,
+    badAttempts: context.actionTracker.getState().badAttempts,
+    gaps: context.actionTracker.getState().gaps
+  };
+
+  eventEmitter.emit(`progress-${requestId}`, {
+    type: 'progress',
+    trackers: trackerData
+  });
+}
+
+// Store the trackers for each request
+const trackers = new Map<string, TrackerContext>();
+
 app.post('/api/v1/query', (async (req: QueryRequest, res: Response) => {
-  const { q, budget, maxBadAttempt } = req.body;
+  const {q, budget, maxBadAttempt} = req.body;
   if (!q) {
-    return res.status(400).json({ error: 'Query (q) is required' });
+    return res.status(400).json({error: 'Query (q) is required'});
   }
 
   const requestId = Date.now().toString();
-  res.json({ requestId });
+
+  // Create new trackers for this request
+  const context: TrackerContext = {
+    tokenTracker: new TokenTracker(),
+    actionTracker: new ActionTracker()
+  };
+  trackers.set(requestId, context);
+
+  // Set up listeners immediately for both trackers
+  context.actionTracker.on('action', () => emitTrackerUpdate(requestId, context));
+  // context.tokenTracker.on('usage', () => emitTrackerUpdate(requestId, context));
+
+  res.json({requestId});
 
   try {
-    const { result, context } = await getResponse(q, budget, maxBadAttempt);
+    const {result} = await getResponse(q, budget, maxBadAttempt, context);
     const emitProgress = createProgressEmitter(requestId, budget, context);
     context.actionTracker.on('action', emitProgress);
     await storeTaskResult(requestId, result);
-    eventEmitter.emit(`progress-${requestId}`, { type: 'answer', data: result });
+    eventEmitter.emit(`progress-${requestId}`, {
+      type: 'answer',
+      data: result,
+      trackers: {
+        tokenUsage: context.tokenTracker.getTotalUsage(),
+        actionState: context.actionTracker.getState()
+      }
+    });
+    cleanup(requestId);
   } catch (error: any) {
     eventEmitter.emit(`progress-${requestId}`, {
       type: 'error',
       data: error?.message || 'Unknown error',
-      status: 500
+      status: 500,
+      trackers: {
+        tokenUsage: context.tokenTracker.getTotalUsage(),
+        actionState: context.actionTracker.getState()
+      }
     });
+    cleanup(requestId);
   }
 }) as RequestHandler);
 
+app.get('/api/v1/stream/:requestId', (async (req: Request, res: StreamResponse) => {
+  const requestId = req.params.requestId;
+  const context = trackers.get(requestId);
+
+  res.setHeader('Content-Type', 'text/event-stream');
+  res.setHeader('Cache-Control', 'no-cache');
+  res.setHeader('Connection', 'keep-alive');
+
+  const listener = (data: StreamMessage) => {
+    // The trackers are now included in all event types
+    // We don't need to add them here as they're already part of the data
+    res.write(`data: ${JSON.stringify(data)}\n\n`);
+  };
+
+  eventEmitter.on(`progress-${requestId}`, listener);
+
+  // Handle client disconnection
+  req.on('close', () => {
+    eventEmitter.removeListener(`progress-${requestId}`, listener);
+  });
+
+  // Send initial connection confirmation with tracker state
+  const initialData = {
+    type: 'connected',
+    requestId,
+    trackers: context ? {
+      tokenUsage: context.tokenTracker.getTotalUsage(),
+      actionState: context.actionTracker.getState()
+    } : null
+  };
+  res.write(`data: ${JSON.stringify(initialData)}\n\n`);
+}) as RequestHandler);
+
 async function storeTaskResult(requestId: string, result: StepAction) {
   try {
     const taskDir = path.join(process.cwd(), 'tasks');
-    await fs.mkdir(taskDir, { recursive: true });
+    await fs.mkdir(taskDir, {recursive: true});
     await fs.writeFile(
       path.join(taskDir, `${requestId}.json`),
       JSON.stringify(result, null, 2)
@@ -130,7 +192,7 @@ app.get('/api/v1/task/:requestId', (async (req: Request, res: Response) => {
     const taskData = await fs.readFile(taskPath, 'utf-8');
     res.json(JSON.parse(taskData));
   } catch (error) {
-    res.status(404).json({ error: 'Task not found' });
+    res.status(404).json({error: 'Task not found'});
   }
 }) as RequestHandler);