def prevNextDateButtons(self):
showingDate = self.params['date']
if showingDate is None:
if self.desc.currentPhoto() is None:
return None
try:
showingDate = photoDate(self.graph, self.desc.currentPhoto())
except ValueError:
return None
dtd = parse_date(showingDate)
try:
prev = dict(prevDate=date_isoformat(nextDateWithPics(
self.graph, dtd, -datetime.timedelta(days=1))))
except ValueError:
prev = None
try:
next = dict(nextDate=date_isoformat(nextDateWithPics(
self.graph, dtd, datetime.timedelta(days=1))))
except ValueError:
next = None
return dict(prev=prev, next=next)
def prevNextDateButtons(self):
showingDate = self.params['date']
if showingDate is None:
if self.desc.currentPhoto() is None:
return None
try:
showingDate = photoDate(self.graph, self.desc.currentPhoto())
except ValueError:
return None
dtd = parse_date(showingDate)
try:
prev = dict(prevDate=date_isoformat(
nextDateWithPics(self.graph, dtd, -datetime.timedelta(
days=1))))
except ValueError:
prev = None
try:
next = dict(nextDate=date_isoformat(
nextDateWithPics(self.graph, dtd, datetime.timedelta(days=1))))
except ValueError:
next = None
return dict(prev=prev, next=next)
def parse_datetime(datetimestring):
'''
Parses ISO 8601 date-times into datetime.datetime objects.
This function uses parse_date and parse_time to do the job, so it allows
more combinations of date and time representations, than the actual
ISO 8601:2004 standard allows.
'''
datestring, timestring = datetimestring.split('T')
tmpdate = parse_date(datestring)
tmptime = parse_time(timestring)
return datetime.combine(tmpdate, tmptime)
def parse_datetime(datetimestring):
"""
Parses ISO 8601 date-times into datetime.datetime objects.
This function uses parse_date and parse_time to do the job, so it allows
more combinations of date and time representations, than the actual
ISO 8601:2004 standard allows.
"""
try:
datestring, timestring = datetimestring.split("T")
except ValueError:
raise ISO8601Error("ISO 8601 time designator 'T' missing. Unable to"
" parse datetime string %r" % datetimestring)
tmpdate = parse_date(datestring)
tmptime = parse_time(timestring)
return datetime.combine(tmpdate, tmptime)
def parse_datetime(datetimestring):
"""
Parses ISO 8601 date-times into datetime.datetime objects.
This function uses parse_date and parse_time to do the job, so it allows
more combinations of date and time representations, than the actual
ISO 8601:2004 standard allows.
"""
try:
datestring, timestring = datetimestring.split("T")
except ValueError:
raise ISO8601Error(
"ISO 8601 time designator 'T' missing. Unable to" " parse datetime string %r" % datetimestring
)
tmpdate = parse_date(datestring)
tmptime = parse_time(timestring)
return datetime.combine(tmpdate, tmptime)
def parse_interval(interval_string):
if not isinstance(interval_string, string_types):
raise TypeError("Expecing a string")
segment_count = interval_string.count(SEGMENT_DELIM)
if segment_count < 1 or segment_count > 2:
raise ISO8601Error(
"Improper number of interval string segments. Must have 1 or 2")
segments = interval_string.split(SEGMENT_DELIM)
for idx, seg in enumerate(segments):
if len(seg) == 0:
return ISO8601Error("Interval segment index %s was empty" % idx)
count = None
if len(segments) == 3:
# Rn/start/end
# Rn/start/duration
# Rn/duration/end
s0 = segments[0]
match = ISO8601_REPEAT_REGEX.match(s0)
if not match:
raise ISO8601Error("Repeat notation did not match expected")
groups = match.groupdict()
count = groups.get("count", None)
if len(count) > 0:
count = int(count)
segments = segments[1:]
s0 = segments[0]
s1 = segments[1]
# remaining segments are either
# 1) start/end.
# start must be a fully specified datetime format
# end can either be a time, date, or datetime
# 2) start/duration
# start must be a fully specified datetime format
# duration must be a valid duration format
# 3) duration/end
# duration must be a valid duration format
# end must be a fully specified datetime format
start = None
end = None
duration = None
try: # (1)
start = parse_datetime(s0)
print("second to last term is a datetime")
except:
try:
duration = parse_duration(s0)
print("second to last term is a datetime")
except:
raise ISO8601Error(
"First term after repeat must be either " +
"a fully specified datetime or a valid duration")
# look at last term
# this isn't the prettiest way to do it, but it is effective
# could also build the regexes from other modules, but delegation avoids code duplication
if start:
# last term must be a duration, date, time or datetime
try:
end = parse_datetime(s1)
print("last term is a datetime")
except:
try:
end = parse_date(s1)
print("last term is a date")
except:
try:
end = parse_time(s1)
print("last term is a time")
except:
try:
duration = parse_duration(s1)
print("last term is a duration")
except:
raise ISO8601Error(
"When first term after repeat is a datetime, " +
"last term must be either a duration, datetime, date, or time"
)
elif duration:
# last term must be the end datetime
try:
end = parse_datetime(s1)
except:
raise ISO8601Error("If first term after repeat is a duration, " +
"last term must be a datetime")
interval = Interval(start=start, end=end, duration=duration, repeat=count)
print(interval)
