old_contents: """hug/validate.py
  
  Defines hugs built-in validation methods
  
  Copyright (C) 2016  Timothy Edmund Crosley
  
  Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
  documentation files (the "Software"), to deal in the Software without restriction, including without limitation
  the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and
  to permit persons to whom the Software is furnished to do so, subject to the following conditions:
  
  The above copyright notice and this permission notice shall be included in all copies or
  substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
  TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
  CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  OTHER DEALINGS IN THE SOFTWARE.
  
  """
  from __future__ import absolute_import
  
  
  def all(*validators):
      """Validation only succeeds if all passed in validators return no errors"""
      def validate_all(fields):
          for validator in validators:
              errors = validator(fields)
              if errors:
                  return errors
  
      validate_all.__doc__ = " and ".join(validator.__doc__ for validator in validators)
      return validate_all
  
  
  def any(*validators):
      """If any of the specified validators pass the validation succeeds"""
      def validate_any(fields):
          errors = {}
          for validator in validators:
              validation_errors = validator(fields)
              if not validation_errors:
                  return
              errors.update(validation_errors)
          return errors
  
      validate_any.__doc__ = " or ".join(validator.__doc__ for validator in validators)
      return validate_any
  
  
  def contains_one_of(*fields):
      """Enables ensuring that one of multiple optional fields is set"""
      message = 'Must contain any one of the following fields: {0}'.format(', '.join(fields))
  
      def check_contains(endpoint_fields):
          for field in fields:
              if field in endpoint_fields:
                  return
  
          errors = {}
          for field in fields:
              errors[field] = 'one of these must have a value'
          return errors
      check_contains.__doc__ = message
      return check_contains
  
new_contents: """hug/validate.py
  
  Defines hugs built-in validation methods
  
  Copyright (C) 2016  Timothy Edmund Crosley
  
  Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated
  documentation files (the "Software"), to deal in the Software without restriction, including without limitation
  the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and
  to permit persons to whom the Software is furnished to do so, subject to the following conditions:
  
  The above copyright notice and this permission notice shall be included in all copies or
  substantial portions of the Software.
  
  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
  TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
  CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  OTHER DEALINGS IN THE SOFTWARE.
  
  """
  from __future__ import absolute_import
  
  
  def all(*validators):
      """Validation only succeeds if all passed in validators return no errors"""
      def validate_all(fields):
          for validator in validators:
              errors = validator(fields)
              if errors:
                  return errors
  
      validate_all.__doc__ = " and ".join(validator.__doc__ for validator in validators)
      return validate_all
  
  
  def any(*validators):
      """If any of the specified validators pass the validation succeeds"""
      def validate_any(fields):
          errors = {}
          for validator in validators:
              validation_errors = validator(fields)
              if not validation_errors:
                  return
              errors.update(validation_errors)
          return errors
  
      validate_any.__doc__ = " or ".join(validator.__doc__ for validator in validators)
      return validate_any
  
  
  def contains_one_of(*fields, **kwargs):
      """Enables ensuring that one of multiple optional fields is set"""
      message = 'Must contain any one of the following fields: {0}'.format(', '.join(fields))
  
      def check_contains(endpoint_fields):
          for field in fields:
              if field in endpoint_fields:
                  return
  
          errors = {}
          for field in fields:
              errors[field] = 'one of these must have a value'
          return errors
      check_contains.__doc__ = message
      return check_contains
  
subject: Update validate.py