remove preview for all file except images

src/app/lib/getFileType.ts

@@ -0,0 +1,28 @@
+export const getFileType = (fileName: string, allowedExtensions: {
+	images: string[],
+	videos: string[],
+	audios: string[],
+	documents: string[]
+}): 'image' | 'video' | 'audio' | 'document' | 'unknown' => {
+
+	const lastDotIndex = fileName.lastIndexOf('.');
+	const extension = fileName.substring(lastDotIndex + 1).toLowerCase();
+
+	if (allowedExtensions.images.includes(extension)) {
+		return 'image';
+	}
+
+	if (allowedExtensions.videos.includes(extension)) {
+		return 'video';
+	}
+
+	if (allowedExtensions.audios.includes(extension)) {
+		return 'audio';
+	}
+
+	if (allowedExtensions.documents.includes(extension)) {
+		return 'document';
+	}
+
+	return 'unknown';
+}