fix: Manually filter fetched reports to adhere to date ranges

Fixes #83

findmy/reports/reports.py

@@ -7,7 +7,7 @@
 import logging
 import struct
 from datetime import datetime, timedelta, timezone
-from typing import TYPE_CHECKING, Sequence, overload
+from typing import TYPE_CHECKING, overload
 
 from cryptography.hazmat.backends import default_backend
 from cryptography.hazmat.primitives.asymmetric import ec
@@ -18,6 +18,8 @@
 from findmy.keys import HasHashedPublicKey, KeyPair
 
 if TYPE_CHECKING:
+    from collections.abc import Sequence
+
     from .account import AsyncAppleAccount
 
 logging.getLogger(__name__)
@@ -315,8 +317,12 @@ async def _fetch_reports(
     ) -> list[LocationReport]:
         logging.debug("Fetching reports for %s keys", len(keys))
 
-        start_date = int(date_from.timestamp() * 1000)
-        end_date = int(date_to.timestamp() * 1000)
+        # lock requested time range to the past 7 days, +- 12 hours, then filter the response.
+        # this is due to an Apple backend bug where the time range is not respected.
+        # More info: https://github.com/biemster/FindMy/issues/7
+        now = datetime.now().astimezone()
+        start_date = int((now - timedelta(days=7, hours=12)).timestamp() * 1000)
+        end_date = int((now + timedelta(hours=12)).timestamp() * 1000)
         ids = [key.hashed_adv_key_b64 for key in keys]
         data = await self._account.fetch_raw_reports(start_date, end_date, ids)
 
@@ -338,6 +344,9 @@ async def _fetch_reports(
             if isinstance(key, KeyPair):
                 loc_report.decrypt(key)
 
+            if loc_report.timestamp < date_from or loc_report.timestamp > date_to:
+                continue
+
             reports.append(loc_report)
 
         return reports