def _get_threat_exchange_datasets(
table: Table,
threat_exchange_data_bucket_name: str,
threat_exchange_data_folder: str,
threat_exchange_pdq_file_extension: str,
) -> t.List[ThreatExchangeDatasetSummary]:
collaborations = ThreatExchangeConfig.get_all()
hash_counts: t.Dict[
str, t.Tuple[int, str]
] = _get_signal_hash_count_and_last_modified(
threat_exchange_data_bucket_name,
threat_exchange_data_folder,
threat_exchange_pdq_file_extension,
)
match_counts: t.Dict[str, int] = MatchByPrivacyGroupCounter.get_all_counts(table)
return [
ThreatExchangeDatasetSummary(
collab.privacy_group_id,
collab.privacy_group_name,
collab.description,
collab.fetcher_active,
collab.matcher_active,
collab.write_back,
collab.in_use,
hash_count=t.cast(
int,
hash_counts.get(
f"{threat_exchange_data_folder}{collab.privacy_group_id}{threat_exchange_pdq_file_extension}",
[0, ""],
)[0],
),
match_count=match_counts.get(collab.privacy_group_id, 0),
)
for collab in collaborations
]
def update_privacy_groups_in_use(priavcy_group_id_in_use: set) -> None:
collabs = ThreatExchangeConfig.get_all()
for collab in collabs:
if str(collab.privacy_group_id) not in priavcy_group_id_in_use:
collab.in_use = False
hmaconfig.update_config(collab)
def lambda_handler(event, context):
lambda_init_once()
config = FetcherConfig.get()
collabs = ThreatExchangeConfig.get_all()
now = datetime.now()
current_time = now.strftime("%H:%M:%S")
names = [collab.privacy_group_name for collab in collabs[:5]]
if len(names) < len(collabs):
names[-1] = "..."
data = f"Triggered at time {current_time}, found {len(collabs)} collabs: {', '.join(names)}"
logger.info(data)
api_key = AWSSecrets().te_api_key()
api = ThreatExchangeAPI(api_key)
te_data_bucket = s3.Bucket(config.s3_bucket)
stores = []
for collab in collabs:
logger.info("Processing updates for collaboration %s",
collab.privacy_group_name)
if not is_int(collab.privacy_group_id):
logger.info(
f"Fetch skipped because privacy_group_id({collab.privacy_group_id}) is not an int"
)
continue
indicator_store = ThreatUpdateS3PDQStore(
int(collab.privacy_group_id),
api.app_id,
te_data_bucket,
config.s3_te_data_folder,
config.data_store_table,
)
stores.append(indicator_store)
indicator_store.load_checkpoint()
if indicator_store.stale:
logger.warning(
"Store for %s - %d stale! Resetting.",
collab.privacy_group_name,
int(collab.privacy_group_id),
)
indicator_store.reset()
if indicator_store.fetch_checkpoint >= now.timestamp():
continue
delta = indicator_store.next_delta
try:
delta.incremental_sync_from_threatexchange(api, )
except:
# Don't need to call .exception() here because we're just re-raising
logger.error("Exception occurred! Attempting to save...")
# Force delta to show finished
delta.end = delta.current
raise
finally:
if delta:
logging.info("Fetch complete, applying %d updates",
len(delta.updates))
indicator_store.apply_updates(
delta, post_apply_fn=indicator_store.post_apply)
else:
logging.error("Failed before fetching any records")