mirror of
https://github.com/samuelclay/NewsBlur.git
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108 lines
3.2 KiB
Python
108 lines
3.2 KiB
Python
from datetime import timedelta
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from mongoengine.base import BaseField
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from mongoengine.fields import EmailField, IntField, StringField
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class TimedeltaField(BaseField):
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"""A timedelta field.
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Looks to the outside world like a datatime.timedelta, but stores
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in the database as an integer (or float) number of seconds.
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"""
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def validate(self, value):
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if not isinstance(value, (timedelta, int, float)):
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self.error('cannot parse timedelta "%r"' % value)
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def to_mongo(self, value):
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return self.prepare_query_value(None, value)
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def to_python(self, value):
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return timedelta(seconds=value)
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def prepare_query_value(self, op, value):
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if value is None:
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return value
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if isinstance(value, timedelta):
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return self.total_seconds(value)
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if isinstance(value, (int, float)):
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return value
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@staticmethod
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def total_seconds(value):
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"""Implements Python 2.7's datetime.timedelta.total_seconds()
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for backwards compatibility with Python 2.5 and 2.6.
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"""
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try:
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return value.total_seconds()
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except AttributeError:
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return (value.days * 24 * 3600) + (value.seconds) + (value.microseconds / 1000000.0)
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class LowerStringField(StringField):
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def __set__(self, instance, value):
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value = self.to_python(value)
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return super(LowerStringField, self).__set__(instance, value)
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def to_python(self, value):
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if value:
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value = value.lower()
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return value
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def prepare_query_value(self, op, value):
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value = value.lower() if value else value
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return super(LowerStringField, self).prepare_query_value(op, value)
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class LowerEmailField(LowerStringField):
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def validate(self, value):
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if not EmailField.EMAIL_REGEX.match(value):
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self.error("Invalid Mail-address: %s" % value)
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super(LowerEmailField, self).validate(value)
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class EnumField(object):
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"""
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A class to register Enum type (from the package enum34) into mongo
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:param choices: must be of :class:`enum.Enum`: type
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and will be used as possible choices
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"""
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def __init__(self, enum, *args, **kwargs):
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self.enum = enum
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kwargs["choices"] = [choice for choice in enum]
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super(EnumField, self).__init__(*args, **kwargs)
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def __get_value(self, enum):
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return enum.value if hasattr(enum, "value") else enum
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def to_python(self, value):
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return self.enum(super(EnumField, self).to_python(value))
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def to_mongo(self, value):
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return self.__get_value(value)
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def prepare_query_value(self, op, value):
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return super(EnumField, self).prepare_query_value(op, self.__get_value(value))
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def validate(self, value):
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return super(EnumField, self).validate(self.__get_value(value))
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def _validate(self, value, **kwargs):
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return super(EnumField, self)._validate(self.enum(self.__get_value(value)), **kwargs)
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class IntEnumField(EnumField, IntField):
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"""A variation on :class:`EnumField` for only int containing enumeration."""
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pass
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class StringEnumField(EnumField, StringField):
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"""A variation on :class:`EnumField` for only string containing enumeration."""
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pass
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