def _truncate_date_value_according_on_date_field(field, date_value):
"""Truncates date value (to year only) according to the given date field.
Args:
field (unicode): The field for which the date value will be used to query on.
date_value (str): The date value that is going to be truncated to its year.
Returns:
PartialDate: The possibly truncated date, on success. None, otherwise.
Notes:
In case the fieldname is in `ES_MAPPING_HEP_DATE_ONLY_YEAR`, then the date is normalized and then only its year
value is used. This is needed for ElasticSearch to be able to do comparisons on dates that have only year, which
fails if being queried with a date with more .
"""
try:
partial_date = PartialDate.parse(date_value)
except ValueError:
return None
if field in ES_MAPPING_HEP_DATE_ONLY_YEAR:
truncated_date = PartialDate.from_parts(partial_date.year)
else:
truncated_date = partial_date
return truncated_date
def _get_next_date_from_partial_date(partial_date):
"""Calculates the next date from the given partial date.
Args:
partial_date (inspire_utils.date.PartialDate): The partial date whose next date should be calculated.
Returns:
PartialDate: The next date from the given partial date.
"""
relativedelta_arg = 'years'
if partial_date.month:
relativedelta_arg = 'months'
if partial_date.day:
relativedelta_arg = 'days'
next_date = parse(
partial_date.dumps()) + relativedelta(**{relativedelta_arg: 1})
return PartialDate.from_parts(
next_date.year, next_date.month if partial_date.month else None,
next_date.day if partial_date.day else None)
def get_date(date_node):
"""Extract a date from a date node.
Returns:
PartialDate: the parsed date.
"""
iso_string = date_node.xpath('./@iso-8601-date').extract_first()
iso_date = PartialDate.loads(iso_string) if iso_string else None
year = date_node.xpath('string(./year)').extract_first()
month = date_node.xpath('string(./month)').extract_first()
day = date_node.xpath('string(./day)').extract_first()
date_from_parts = PartialDate.from_parts(year, month, day) if year else None
string_date = date_node.xpath('string(./string-date)').extract_first()
try:
parsed_date = PartialDate.parse(string_date)
except ValueError:
parsed_date = None
date = get_first([iso_date, date_from_parts, parsed_date])
return date
def get_date(date_node):
"""Extract a date from a date node.
Returns:
PartialDate: the parsed date.
"""
iso_string = date_node.xpath('./@iso-8601-date').extract_first()
iso_date = PartialDate.loads(iso_string) if iso_string else None
year = date_node.xpath('string(./year)').extract_first()
month = date_node.xpath('string(./month)').extract_first()
day = date_node.xpath('string(./day)').extract_first()
date_from_parts = PartialDate.from_parts(year, month, day) if year else None
string_date = date_node.xpath('string(./string-date)').extract_first()
try:
parsed_date = PartialDate.parse(string_date)
except ValueError:
parsed_date = None
date = get_first([iso_date, date_from_parts, parsed_date])
return date
def test_partial_date_from_parts():
expected = PartialDate(1686, 6)
assert expected == PartialDate.from_parts(1686, 'June')
