def earliest_date(sender, *args, **kwargs):
"""Find and assign the earliest date to a HEP paper."""
dates = []
if 'preprint_date' in sender:
dates.append(sender['preprint_date'])
if 'thesis' in sender:
for thesis_key in sender['thesis']:
if 'date' in thesis_key:
dates.append(thesis_key['date'])
if 'defense_date' in thesis_key:
dates.append(thesis_key['defense_date'])
if 'publication_info' in sender:
for publication_info_key in sender['publication_info']:
if 'year' in publication_info_key:
dates.append(publication_info_key['year'])
# Sort dates and pick the first one.
dates.sort()
if dates:
sender['earliest_date'] = \
inspire_dojson_utils.create_valid_date(dates[0])
def test_create_valid_date():
"""Test date validator used in dojson conversions."""
assert create_valid_date(1877) == '1877-01-01'
assert create_valid_date("1877") == '1877-01-01'
assert create_valid_date("1877-02") == '1877-02-01'
assert create_valid_date("1877-02-03") == '1877-02-03'
assert create_valid_date(1977) == '1977-01-01'
assert create_valid_date("1977") == '1977-01-01'
assert create_valid_date("1977-06-02") == '1977-06-02'
