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# Authors: see git history
#
# Copyright (c) 2010 Authors
# Licensed under the GNU GPL version 3.0 or later. See the file LICENSE for details.
from flask.json.provider import DefaultJSONProvider
from ..exceptions import InkstitchException
class InkstitchJSONException(InkstitchException):
pass
class InkStitchJSONProvider(DefaultJSONProvider):
"""JSON encoder class that runs __json__ on an object if available.
The __json__ method should return a JSON-compatible representation of the
object.
"""
def default(self, obj):
try:
return obj.__json__()
except AttributeError:
raise InkstitchJSONException(
f"Object of type {obj.__class__.__name__} cannot be serialized to JSON because it does not implement __json__()")
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