55 lines
1.3 KiB
Python
55 lines
1.3 KiB
Python
from __future__ import unicode_literals
|
|
|
|
from dateutil.parser import parse
|
|
|
|
from django.core.exceptions import ValidationError
|
|
|
|
|
|
class MetadataParser(object):
|
|
_registry = []
|
|
|
|
@classmethod
|
|
def register(cls, parser):
|
|
cls._registry.append(parser)
|
|
|
|
@classmethod
|
|
def get_all(cls):
|
|
return cls._registry
|
|
|
|
@classmethod
|
|
def get_import_path(cls):
|
|
return cls.__module__ + '.' + cls.__name__
|
|
|
|
@classmethod
|
|
def get_import_paths(cls):
|
|
return [validator.get_import_path() for validator in cls.get_all()]
|
|
|
|
def execute(self, input_data):
|
|
raise NotImplementedError
|
|
|
|
def parse(self, input_data):
|
|
try:
|
|
return self.execute(input_data)
|
|
except Exception as exception:
|
|
raise ValidationError(exception)
|
|
|
|
|
|
class DateAndTimeParser(MetadataParser):
|
|
def execute(self, input_data):
|
|
return parse(input_data).isoformat()
|
|
|
|
|
|
class DateParser(MetadataParser):
|
|
def execute(self, input_data):
|
|
return parse(input_data).date().isoformat()
|
|
|
|
|
|
class TimeParser(MetadataParser):
|
|
def execute(self, input_data):
|
|
return parse(input_data).time().isoformat()
|
|
|
|
|
|
MetadataParser.register(DateAndTimeParser)
|
|
MetadataParser.register(DateParser)
|
|
MetadataParser.register(TimeParser)
|