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import datetime
from dateutil.parser import isoparse
from graphql.error import GraphQLError
from graphql.language import StringValueNode, print_ast
from .scalars import Scalar
class Date(Scalar):
"""
The `Date` scalar type represents a Date
value as specified by
[iso8601](https://en.wikipedia.org/wiki/ISO_8601).
"""
@staticmethod
def serialize(date):
if isinstance(date, datetime.datetime):
date = date.date()
if not isinstance(date, datetime.date):
raise GraphQLError(f"Date cannot represent value: {repr(date)}")
return date.isoformat()
@classmethod
def parse_literal(cls, node, _variables=None):
if not isinstance(node, StringValueNode):
raise GraphQLError(
f"Date cannot represent non-string value: {print_ast(node)}"
)
return cls.parse_value(node.value)
@staticmethod
def parse_value(value):
if isinstance(value, datetime.date):
return value
if not isinstance(value, str):
raise GraphQLError(f"Date cannot represent non-string value: {repr(value)}")
try:
return datetime.date.fromisoformat(value)
except ValueError:
raise GraphQLError(f"Date cannot represent value: {repr(value)}")
class DateTime(Scalar):
"""
The `DateTime` scalar type represents a DateTime
value as specified by
[iso8601](https://en.wikipedia.org/wiki/ISO_8601).
"""
@staticmethod
def serialize(dt):
if not isinstance(dt, (datetime.datetime, datetime.date)):
raise GraphQLError(f"DateTime cannot represent value: {repr(dt)}")
return dt.isoformat()
@classmethod
def parse_literal(cls, node, _variables=None):
if not isinstance(node, StringValueNode):
raise GraphQLError(
f"DateTime cannot represent non-string value: {print_ast(node)}"
)
return cls.parse_value(node.value)
@staticmethod
def parse_value(value):
if isinstance(value, datetime.datetime):
return value
if not isinstance(value, str):
raise GraphQLError(
f"DateTime cannot represent non-string value: {repr(value)}"
)
try:
return isoparse(value)
except ValueError:
raise GraphQLError(f"DateTime cannot represent value: {repr(value)}")
class Time(Scalar):
"""
The `Time` scalar type represents a Time value as
specified by
[iso8601](https://en.wikipedia.org/wiki/ISO_8601).
"""
@staticmethod
def serialize(time):
if not isinstance(time, datetime.time):
raise GraphQLError(f"Time cannot represent value: {repr(time)}")
return time.isoformat()
@classmethod
def parse_literal(cls, node, _variables=None):
if not isinstance(node, StringValueNode):
raise GraphQLError(
f"Time cannot represent non-string value: {print_ast(node)}"
)
return cls.parse_value(node.value)
@classmethod
def parse_value(cls, value):
if isinstance(value, datetime.time):
return value
if not isinstance(value, str):
raise GraphQLError(f"Time cannot represent non-string value: {repr(value)}")
try:
return datetime.time.fromisoformat(value)
except ValueError:
raise GraphQLError(f"Time cannot represent value: {repr(value)}")
|
