squash!: implement some suggestions

Author: rodmgwgu

openedx/core/djangoapps/content_libraries/api/libraries.py

@@ -705,18 +705,18 @@ def get_backup_task_status(
     If no task is found, returns None.
     """
     task_status = None
-    if not task_id:
-        # Get the latest task for this user and library
-        task_status = UserTaskStatus.objects.filter(
-            user_id=user_id,
-            name__contains=str(library_key)
-        ).order_by('-created').first()
-    else:
+    if task_id:
         # Get the specific task by ID
         try:
             task_status = UserTaskStatus.objects.get(task_id=task_id, user_id=user_id)
         except UserTaskStatus.DoesNotExist:
             return None
+    else:
+         # Get the latest task for this user and library
+        task_status = UserTaskStatus.objects.filter(
+            user_id=user_id,
+            name__contains=str(library_key)
+        ).order_by('-created').first()
 
     if not task_status:
         return None

openedx/core/djangoapps/content_libraries/rest_api/libraries.py

@@ -731,7 +731,8 @@ class LibraryBackupView(APIView):
 
         The HTTP 200 response has the following values:
 
-        * state: String description of the state of the task
+        * state: String description of the state of the task.
+            Possible states: "Pending", "Exporting", "Succeeded", "Failed".
         * url: (may be null) If the task is complete, a URL to download the .zip file
 
     **Example GET Response**

openedx/core/djangoapps/content_libraries/tasks.py

@@ -507,7 +507,7 @@ def generate_name(cls, arguments_dict) -> str:
             str: The generated name
         """
         key = arguments_dict['library_key_str']
-        return f'Export of {key}'
+        return f'Backup of {key}'
 
 
 @shared_task(base=LibraryBackupTask, bind=True)