def within(self, *timespans):
for beginning, end in timespans:
if type(beginning) == str:
beginning = str_to_datetime(beginning)
if type(end) == str:
end = str_to_datetime(end)
if self.timestamp < beginning or self.timestamp > end:
return False
return True
def to_record(self):
# limit API calls
time_shot_utc = self.time_shot_utc
timestamp = str_to_datetime(time_shot_utc)
return {
'source': self.source,
'filename': self.filename,
'path': self.path,
'timestamp': timestamp,
'time_shot_utc': time_shot_utc,
'time_shot_local': self.time_shot_local,
'time_rendered': self.time_rendered,
'geotagged': self.geotagged,
'latitude': self.latitude,
'longitude': self.longitude
}
def is_later(x):
if type(x.time_uploaded) == float and np.isnan(x.time_uploaded):
return True
else:
return str_to_datetime(x.time_uploaded) < str_to_datetime(x.time_rendered)
def timestamp(self):
return str_to_datetime(self.time_shot_utc)
def time_shot_utc(self):
"""
Four cases:
1. GPS time included --> in UTC already
2. GPS included, no GPS time --> TimeZones API to get UTC
3. No GPS, but local time --> TimeZones API to get UTC, using KW for location
4. No GPS, non-local (camera) --> constant offset to UTC
"""
# Case 1
if self.geotagged:
try:
UTC_DATE = self.exif.gps_datestamp
UTC_TIME = self.exif.gps_timestamp
UTC_TIMESTAMP = UTC_DATE + ' ' + '{:02d}:{:02d}:{:02d}'.format(
*[int(t) for t in UTC_TIME])
# make sure GPS time matches local time (rare, but happens)
to_time = lambda x: time(int(x[0]), int(x[1]), int(x[2] // 1))
LOCAL_TIME = str_to_datetime(self.exif.datetime_original)
delta = lambda x, y: abs((x.minute - y.minute) * 60 +
(x.second - y.second))
if delta(to_time(UTC_TIME), LOCAL_TIME.time()) > 60:
raise ValueError('GPS Timestamp is off.')
except:
location = (self.latitude, self.longitude)
naive_dt = str_to_datetime(self.time_shot_local)
UTC_TIMESTAMP = query_utc(naive_dt,
self.tz_keyword,
location=location)
else:
# CASE 3
if 'iPhone' in self.source:
naive_dt = str_to_datetime(self.time_shot_local)
UTC_TIMESTAMP = query_utc(naive_dt,
self.tz_keyword,
location=None)
# CASE 4:
# Initially, camera was in EST, 5h behind UTC
# As of 2019-10-09 camera was in PST, 8h behind UTC
else:
camera_dt = str_to_datetime(self.time_shot_local)
if camera_dt <= str_to_datetime('2019:10:09 00:00:00'):
UTC_OFFSET = timedelta(hours=5)
else:
UTC_OFFSET = timedelta(hours=8)
utc_dt = camera_dt + UTC_OFFSET
UTC_TIMESTAMP = datetime_to_str(utc_dt)
return UTC_TIMESTAMP