A multipurpose python flask API server and administration SPA
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  1. """JSON specific utilities."""
  2. from datetime import date
  3. from typing import Any
  4. import rfc3339
  5. from flask.json import JSONEncoder
  6. from server.api.model import APIResponse, BaseAPIMessage
  7. from server.db import db
  8. from server.errors import BaseError
  9. from server.service.transformation_service import serialize_model
  10. class CustomJSONEncoder(JSONEncoder):
  11. """Ensure that datetime values are serialized correctly."""
  12. def default(self, o: Any) -> Any: # pylint: disable=E0202,R0911
  13. """Handle encoding date and datetime objects according to rfc3339."""
  14. try:
  15. if isinstance(o, date):
  16. return rfc3339.format(o)
  17. if isinstance(o, APIResponse):
  18. payload = o.payload
  19. if isinstance(payload, db.Model):
  20. return serialize_model(o.payload, o.options)
  21. if isinstance(payload, BaseError):
  22. return payload.to_dict()
  23. if isinstance(payload, BaseAPIMessage):
  24. return payload.to_dict()
  25. return payload
  26. if isinstance(o, db.Model):
  27. return serialize_model(o)
  28. iterable = iter(o)
  29. except TypeError:
  30. pass
  31. else:
  32. return list(iterable)
  33. return JSONEncoder.default(self, o)