Fix mistake on grade speaking task 1.

helper/firebase_helper.py

@@ -1,4 +1,11 @@
 from google.cloud import storage
+import os
+import uuid
+
+import firebase_admin
+from firebase_admin import credentials, firestore
+
+from dotenv import load_dotenv
 
 def download_firebase_file(bucket_name, source_blob_name, destination_file_name):
     # Downloads a file from Firebase Storage.
@@ -41,5 +48,18 @@ def upload_file_firebase_get_url(bucket_name, destination_blob_name, source_file
         print("Error uploading file to Google Cloud Storage:", e)
         return None
 
+def save_to_db(collection: str, item):
+    # Initialize Firebase Admin SDK
+    cred = credentials.Certificate(os.getenv("GOOGLE_APPLICATION_CREDENTIALS"))
+    firebase_admin.initialize_app(cred)
+    db = firestore.client()
+    collection_ref = db.collection(collection)
+    document_ref = collection_ref.add(item)
+    if document_ref:
+        print(f"Document added with ID: {document_ref}")
+        return True
+    else:
+        return False
+