feat: add audio and video support to read_file (#2556)

packages/core/src/utils/fileUtils.ts

@@ -94,19 +94,27 @@ export function isBinaryFile(filePath: string): boolean {
 /**
  * Detects the type of file based on extension and content.
  * @param filePath Path to the file.
- * @returns 'text', 'image', 'pdf', or 'binary'.
+ * @returns 'text', 'image', 'pdf', 'audio', 'video', or 'binary'.
  */
 export function detectFileType(
   filePath: string,
-): 'text' | 'image' | 'pdf' | 'binary' {
+): 'text' | 'image' | 'pdf' | 'audio' | 'video' | 'binary' {
   const ext = path.extname(filePath).toLowerCase();
   const lookedUpMimeType = mime.lookup(filePath); // Returns false if not found, or the mime type string
 
-  if (lookedUpMimeType && lookedUpMimeType.startsWith('image/')) {
-    return 'image';
-  }
-  if (lookedUpMimeType && lookedUpMimeType === 'application/pdf') {
-    return 'pdf';
+  if (lookedUpMimeType) {
+    if (lookedUpMimeType.startsWith('image/')) {
+      return 'image';
+    }
+    if (lookedUpMimeType.startsWith('audio/')) {
+      return 'audio';
+    }
+    if (lookedUpMimeType.startsWith('video/')) {
+      return 'video';
+    }
+    if (lookedUpMimeType === 'application/pdf') {
+      return 'pdf';
+    }
   }
 
   // Stricter binary check for common non-text extensions before content check
@@ -187,7 +195,7 @@ export async function processSingleFileContent(
         error: `File not found: ${filePath}`,
       };
     }
-    const stats = fs.statSync(filePath); // Sync check
+    const stats = await fs.promises.stat(filePath);
     if (stats.isDirectory()) {
       return {
         llmContent: '',
@@ -196,6 +204,19 @@ export async function processSingleFileContent(
       };
     }
 
+    const fileSizeInBytes = stats.size;
+    // 20MB limit
+    const maxFileSize = 20 * 1024 * 1024;
+
+    if (fileSizeInBytes > maxFileSize) {
+      throw new Error(
+        `File size exceeds the 20MB limit: ${filePath} (${(
+          fileSizeInBytes /
+          (1024 * 1024)
+        ).toFixed(2)}MB)`,
+      );
+    }
+
     const fileType = detectFileType(filePath);
     const relativePathForDisplay = path
       .relative(rootDirectory, filePath)
@@ -253,7 +274,9 @@ export async function processSingleFileContent(
         };
       }
       case 'image':
-      case 'pdf': {
+      case 'pdf':
+      case 'audio':
+      case 'video': {
         const contentBuffer = await fs.promises.readFile(filePath);
         const base64Data = contentBuffer.toString('base64');
         return {