Little bugfix that made single paged collections crash. Also, now code is more elegant

lib/utils.py

@@ -4,6 +4,7 @@ import json
 import re
 import time
 import datetime
+import math
 import multiprocessing as mp
 from math import ceil
 from typing import List, Dict
@@ -410,11 +411,7 @@ def get_page_index_fast(
     """
 
     pages = []
-    first_page = collection.find()\
-                           .sort("id", pymongo.DESCENDING)\
-                           .limit(page_size)
-    pages.append(first_page[0]["id"])
-    last_id = first_page[page_size - 1]["id"]
+    last_id = math.inf
     while True:
         page = collection.find({"id": {"$lt": last_id}})\
                          .sort("id", pymongo.DESCENDING)\