use isbinaryfile to more safely read contents of folders and files

src/utils/extract-text.ts

@@ -3,6 +3,7 @@ import * as path from "path"
 import pdf from "pdf-parse/lib/pdf-parse"
 import mammoth from "mammoth"
 import fs from "fs/promises"
+import { isBinaryFile } from "isbinaryfile"
 
 export async function extractTextFromFile(filePath: string): Promise<string> {
 	try {
@@ -18,19 +19,13 @@ export async function extractTextFromFile(filePath: string): Promise<string> {
 			return extractTextFromDOCX(filePath)
 		case ".ipynb":
 			return extractTextFromIPYNB(filePath)
-		case ".jpg":
-		case ".jpeg":
-		case ".png":
-		case ".gif":
-		case ".webp":
-		case ".mp4":
-		case ".mp3":
-		case ".wav":
-		case ".avi":
-		case ".mov":
-			return "Cannot read media file."
 		default:
-			return await fs.readFile(filePath, "utf8")
+			const isBinary = await isBinaryFile(filePath).catch(() => false)
+			if (!isBinary) {
+				return await fs.readFile(filePath, "utf8")
+			} else {
+				throw new Error(`Cannot read text for file type: ${fileExtension}`)
+			}
 	}
 }