new: v3bwfile: Include consensus count header

The total number of consensuses seen in the last days.

Part of #28566.

sbws/lib/v3bwfile.py

@@ -229,7 +229,9 @@ def from_results(cls, results, scanner_country=None,
  kwargs = dict()
  latest_bandwidth = cls.latest_bandwidth_from_results(results)
  earliest_bandwidth = cls.earliest_bandwidth_from_results(results)
+ # NOTE: Blocking, reads file
  generator_started = cls.generator_started_from_file(state_fpath)
+ consensus_count = cls.consensus_count_from_file(state_fpath)
  timestamp = str(latest_bandwidth)
  kwargs['latest_bandwidth'] = unixts_to_isodt_str(latest_bandwidth)
  kwargs['earliest_bandwidth'] = unixts_to_isodt_str(earliest_bandwidth)
@@ -240,6 +242,8 @@ def from_results(cls, results, scanner_country=None,
  kwargs['scanner_country'] = scanner_country
  if destinations_countries is not None:
  kwargs['destinations_countries'] = destinations_countries
+ if consensus_count is not None:
+ kwargs['recent_consensus_count'] = str(consensus_count)
  h = cls(timestamp, **kwargs)
  return h
 
@@ -296,6 +300,14 @@ def generator_started_from_file(state_fpath):
  else:
  return None
 
+ @staticmethod
+ def consensus_count_from_file(state_fpath):
+ state = State(state_fpath)
+ if 'consensus_count' in state:
+ return state['consensus_count']
+ else:
+ return None
+
  @staticmethod
  def latest_bandwidth_from_results(results):
  return round(max([r.time for fp in results for r in results[fp]]))