Trace index upload

src/tracing/cloud-sink.ts

@@ -284,7 +284,10 @@ export class CloudTraceSink extends TraceSink {
       if (statusCode === 200) {
         console.log('✅ [Sentience] Trace uploaded successfully');
 
-        // Call /v1/traces/complete to report file sizes (NEW)
+        // Upload trace index file
+        await this._uploadIndex();
+
+        // Call /v1/traces/complete to report file sizes
         await this._completeTrace();
 
         // 4. Delete temp file on success
@@ -381,6 +384,170 @@ export class CloudTraceSink extends TraceSink {
     }
   }
 
+  /**
+   * Upload trace index file to cloud storage.
+   *
+   * Called after successful trace upload to provide fast timeline rendering.
+   * The index file enables O(1) step lookups without parsing the entire trace.
+   */
+  private async _uploadIndex(): Promise<void> {
+    // Construct index file path (same as trace file with .index.json extension)
+    const indexPath = this.tempFilePath.replace('.jsonl', '.index.json');
+
+    try {
+      // Check if index file exists
+      await fsPromises.access(indexPath);
+    } catch {
+      this.logger?.warn('Index file not found, skipping index upload');
+      return;
+    }
+
+    try {
+      // Request index upload URL from API
+      if (!this.apiKey) {
+        this.logger?.info('No API key provided, skipping index upload');
+        return;
+      }
+
+      const uploadUrlResponse = await this._requestIndexUploadUrl();
+      if (!uploadUrlResponse) {
+        return;
+      }
+
+      // Read and compress index file
+      const indexData = await fsPromises.readFile(indexPath);
+      const compressedIndex = zlib.gzipSync(indexData);
+      const indexSize = compressedIndex.length;
+
+      this.logger?.info(`Index file size: ${(indexSize / 1024).toFixed(2)} KB`);
+
+      console.log(`📤 [Sentience] Uploading trace index (${indexSize} bytes)...`);
+
+      // Upload index to cloud storage
+      const statusCode = await this._uploadIndexToCloud(uploadUrlResponse, compressedIndex);
+
+      if (statusCode === 200) {
+        console.log('✅ [Sentience] Trace index uploaded successfully');
+
+        // Delete local index file after successful upload
+        try {
+          await fsPromises.unlink(indexPath);
+        } catch {
+          // Ignore cleanup errors
+        }
+      } else {
+        this.logger?.warn(`Index upload failed: HTTP ${statusCode}`);
+        console.log(`⚠️  [Sentience] Index upload failed: HTTP ${statusCode}`);
+      }
+    } catch (error: any) {
+      // Non-fatal: log but don't crash
+      this.logger?.warn(`Error uploading trace index: ${error.message}`);
+      console.log(`⚠️  [Sentience] Error uploading trace index: ${error.message}`);
+    }
+  }
+
+  /**
+   * Request index upload URL from Sentience API
+   */
+  private async _requestIndexUploadUrl(): Promise<string | null> {
+    return new Promise((resolve) => {
+      const url = new URL(`${this.apiUrl}/v1/traces/index_upload`);
+      const protocol = url.protocol === 'https:' ? https : http;
+
+      const body = JSON.stringify({ run_id: this.runId });
+
+      const options = {
+        hostname: url.hostname,
+        port: url.port || (url.protocol === 'https:' ? 443 : 80),
+        path: url.pathname + url.search,
+        method: 'POST',
+        headers: {
+          'Content-Type': 'application/json',
+          'Content-Length': Buffer.byteLength(body),
+          Authorization: `Bearer ${this.apiKey}`,
+        },
+        timeout: 10000,
+      };
+
+      const req = protocol.request(options, (res) => {
+        let data = '';
+        res.on('data', (chunk) => {
+          data += chunk;
+        });
+        res.on('end', () => {
+          if (res.statusCode === 200) {
+            try {
+              const response = JSON.parse(data);
+              resolve(response.upload_url || null);
+            } catch {
+              this.logger?.warn('Failed to parse index upload URL response');
+              resolve(null);
+            }
+          } else {
+            this.logger?.warn(`Failed to get index upload URL: HTTP ${res.statusCode}`);
+            resolve(null);
+          }
+        });
+      });
+
+      req.on('error', (error) => {
+        this.logger?.warn(`Error requesting index upload URL: ${error.message}`);
+        resolve(null);
+      });
+
+      req.on('timeout', () => {
+        req.destroy();
+        this.logger?.warn('Index upload URL request timeout');
+        resolve(null);
+      });
+
+      req.write(body);
+      req.end();
+    });
+  }
+
+  /**
+   * Upload index data to cloud using pre-signed URL
+   */
+  private async _uploadIndexToCloud(uploadUrl: string, data: Buffer): Promise<number> {
+    return new Promise((resolve, reject) => {
+      const url = new URL(uploadUrl);
+      const protocol = url.protocol === 'https:' ? https : http;
+
+      const options = {
+        hostname: url.hostname,
+        port: url.port || (url.protocol === 'https:' ? 443 : 80),
+        path: url.pathname + url.search,
+        method: 'PUT',
+        headers: {
+          'Content-Type': 'application/json',
+          'Content-Encoding': 'gzip',
+          'Content-Length': data.length,
+        },
+        timeout: 30000, // 30 second timeout
+      };
+
+      const req = protocol.request(options, (res) => {
+        res.on('data', () => {});
+        res.on('end', () => {
+          resolve(res.statusCode || 500);
+        });
+      });
+
+      req.on('error', (error) => {
+        reject(error);
+      });
+
+      req.on('timeout', () => {
+        req.destroy();
+        reject(new Error('Index upload timeout'));
+      });
+
+      req.write(data);
+      req.end();
+    });
+  }
+
   /**
    * Get unique identifier for this sink
    */