bootlog: add helper to get a bootlog by segment id

tools/lib/bootlog.py

@@ -1,6 +1,7 @@
 import datetime
 import functools
 import re
+from typing import List, Optional
 
 from tools.lib.auth_config import get_token
 from tools.lib.api import CommaApi
@@ -48,8 +49,15 @@ class Bootlog:
       return False
     return self.datetime < b.datetime
 
+def get_bootlog_from_id(bootlog_id: str) -> Optional[Bootlog]:
+  # TODO: implement an API endpoint for this
+  bl = Bootlog(bootlog_id)
+  for b in get_bootlogs(bl.dongle_id):
+    if b == bl:
+      return b
+  return None
 
-def get_bootlogs(dongle_id: str):
+def get_bootlogs(dongle_id: str) -> List[Bootlog]:
   api = CommaApi(get_token())
   r = api.get(f'v1/devices/{dongle_id}/bootlogs')
   return [Bootlog(b) for b in r]