update for lp_categories,

002_source/cms/src/lib/file-to-base64.tsx

@@ -10,3 +10,20 @@ export function fileToBase64(file: Blob): Promise<string> {
     };
   });
 }
+
+export function base64ToFile(base64String: string, filename?: string): Promise<File> {
+  return new Promise((resolve, reject) => {
+    const arr = base64String.split(',');
+    const type = arr[0].match(/:(.*?);/)![1];
+    const bstr = atob(arr[1]);
+    let n = bstr.length;
+    const u8arr = new Uint8Array(n);
+
+    while (n--) {
+      u8arr[n] = bstr.charCodeAt(n);
+    }
+
+    const file = new File([u8arr], filename || 'file', { type });
+    resolve(file);
+  });
+}