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objects.py
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objects.py
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import json
import warnings
from datetime import datetime, date
import autoviv
from autoviv import NoneProp
import simplejson
from dateutil import parser as dateutil_parser
from sqlalchemy.ext.mutable import Mutable
from RestResponse import utils
def _encode_hook(opts):
def _default(o):
if isinstance(o, RestObject):
return {k: _default(v) for k, v in o.items()}
elif isinstance(o, RestList) or isinstance(o, ApiCollection):
return [_default(x) for x in o]
if isinstance(o, ApiModel):
return _default(o._data)
return utils.encode_item(o, **opts)
return _default
def _decode_hook(obj):
for k, v in obj.items():
obj[k] = utils.decode_item(v)
return obj
class RestEncoder(json.JSONEncoder):
def __init__(self, *args, **kwargs):
super(RestEncoder, self).__init__(*args, **kwargs)
setattr(self, 'default', _encode_hook({}))
class RestEncoderSimple(simplejson.JSONEncoder):
def __init__(self, *args, **kwargs):
super(RestEncoderSimple, self).__init__(*args, **kwargs)
setattr(self, 'default', _encode_hook({}))
def iterencode(self, o, *args, **kwargs):
try:
return super(RestEncoderSimple, self).iterencode(o, *args, **kwargs)
except Exception:
# this could use a better solution
return super(RestEncoderSimple, self).iterencode(json.loads(str(o)), *args, **kwargs)
json._default_encoder = RestEncoder()
simplejson._default_encoder = RestEncoderSimple()
class RestResponseObj(Mutable, object):
__opts__ = {
'encode_binary': True,
'encode_callable': True,
'decode_binary': True,
'decode_callable': True
}
@classmethod
def coerce(cls, key, value):
if isinstance(value, dict) and not isinstance(value, RestObject):
return RestObject(value)
elif isinstance(value, list) and not isinstance(value, RestList):
return RestList(value)
else:
return value
def changed(self):
super(RestResponseObj, self).changed()
def __call__(self):
return self
class RestList(RestResponseObj, autoviv.List):
def __init__(self, iterable=()):
for x in iter(iterable):
self.append(x)
def __repr__(self):
return autoviv.pprint(self, indent=None, cls=RestEncoder)
def pretty_print(self, indent=4):
return autoviv.pprint(self, indent=indent, cls=RestEncoder)
def __setitem__(self, index, item):
if isinstance(item, NoneProp):
return
item = RestResponse.parse(item)
super(RestList, self).__setitem__(index, item)
self.changed()
def append(self, item):
self.insert(len(self), item)
self.changed()
def extend(self, items):
for item in items:
self.append(item)
def insert(self, index, item):
if isinstance(item, NoneProp):
return
item = RestResponse.parse(item)
super(RestList, self).insert(index, item)
self.changed()
def pop(self, index=None):
if index:
item = super(RestList, self).pop(index)
else:
item = super(RestList, self).pop()
self.changed()
return item
def remove(self, item):
super(RestList, self).remove(item)
self.changed()
class RestObject(RestResponseObj, autoviv.Dict):
def __init__(self, *args, **kwargs):
super(RestObject, self).__init__()
self.update(*args, **kwargs)
def __repr__(self):
return self.pretty_print(indent=None)
def __str__(self):
return self.pretty_print(indent=None)
def pretty_print(self, indent=4):
return autoviv.pprint(self, indent=indent, cls=RestEncoder)
def __delattr__(self, name):
if name in self:
del self[name]
self.changed()
def clear(self):
super(RestObject, self).clear()
self.changed()
def pop(self, name, default=None):
if name in self:
value = super(RestObject, self).pop(name, default)
self.changed()
else:
value = default
return value
def popitem(self):
value = super(RestObject, self).popitem()
self.changed()
return value
def __missing__(self, key):
return self.__getattr__(key)
def __getattr__(self, key):
if key in self:
value = self[key]
return value
elif key == '__clause_element__':
# SQLAlchemy will try to call this prop, raise AttributeError to avoid
raise AttributeError(key)
else:
return super(RestObject, self).__getattr__(key)
def __setattr__(self, key, value):
if isinstance(value, NoneProp):
return
if key != '__none_props__':
value = RestResponse.parse(value)
super(RestObject, self).__setattr__(key, value)
self.changed()
def update(self, *args, **kwargs):
result = {}
for k, v in dict(*args, **kwargs).items():
result[k] = RestResponse.parse(v)
super(RestObject, self).update(**result)
self.changed()
class RestResponse(object):
def __new__(self, data, **kwargs):
if isinstance(data, str):
return RestResponse.loads(data)
else:
return RestResponse.parse(data)
@staticmethod
def parse(data):
if isinstance(data, RestResponseObj) or isinstance(data, NoneProp):
return data
elif isinstance(data, dict):
return RestObject(data)
elif isinstance(data, list):
return RestList(data)
else:
return data
@staticmethod
def loads(data, **kwargs):
try:
data = json.loads(data, object_hook=_decode_hook, **kwargs)
except Exception:
raise ValueError('RestResponse data must be JSON deserializable')
return RestResponse.parse(data)
class ApiModel(object):
__opts__ = {
'encode_binary': False,
'encode_callable': False,
'decode_binary': False,
'decode_callable': False,
'encode_datetime': lambda x: datetime.strftime(x, '%Y-%m-%dT%H:%M:%SZ'),
'encode_date': lambda x: datetime.strftime(x, '%Y-%m-%d'),
'_overrides': [],
}
def __bool__(self):
return bool(self._data)
def __nonzero__(self):
return bool(self._data)
def __eq__(self, other):
if not isinstance(other, ApiModel):
return False
return self._data == other._data
@property
def _data(self):
return self.__data
@_data.setter
def _data(self, data):
data = data or RestResponse.parse({})
if isinstance(data, dict) or isinstance(data, list):
data = RestResponse.parse(data)
elif isinstance(data, str):
try:
data = RestResponse.loads(data or "{}")
except ValueError as e:
raise ValueError('{0} data must be JSON serializable'.format(self.__class__)) from e
elif isinstance(data, ApiModel):
data = data._data
self.__data = RestResponse.parse({})
for prop in dir(self):
if (not prop.startswith('_') or prop in self.__opts__.get('_overrides', [])) and prop in data:
setattr(self, prop, data[prop])
@property
def _as_json(self):
return json.loads(json.dumps(self._data, default=_encode_hook(self.__opts__)))
def _set_datetime(self, d, format='%Y-%m-%dT%H:%M:%SZ'):
return self._format_datetime(d, format=format, raises_value_error=True)
def _get_datetime(self, d, format='%Y-%m-%dT%H:%M:%SZ'):
return self._format_datetime(d, format=format, raises_value_error=False)
def _format_datetime(self, d, format='%Y-%m-%dT%H:%M:%SZ', raises_value_error=False):
if not isinstance(d, datetime) or not isinstance(d, date):
try:
d = dateutil_parser.parse(d)
return datetime.strptime(d.strftime(format), format)
except ValueError:
if raises_value_error:
raise
else:
warnings.warn('Value must be date or datetime')
return None
else:
return d
def _set_date(self, d, format='%Y-%m-%d'):
return self._format_date(d, format=format, raises_value_error=True)
def _get_date(self, d, format='%Y-%m-%d'):
return self._format_date(d, format=format, raises_value_error=False)
def _format_date(self, d, format='%Y-%m-%d', raises_value_error=False):
if not isinstance(d, date):
try:
d = dateutil_parser.parse(d)
return datetime.strptime(d.strftime(format), format).date()
except ValueError:
if raises_value_error:
raise
else:
warnings.warn('Value must be date')
return None
else:
return d
def _set_string(self, s):
return self._format_string(s, raises_value_error=True)
def _get_string(self, s):
return self._format_string(s, raises_value_error=False)
def _format_string(self, s, raises_value_error=False):
if raises_value_error and not isinstance(s, str):
raise ValueError('Value must be str')
return '%s' % (s or '')
def _set_float(self, f):
return self._format_float(f, raises_value_error=True)
def _get_float(self, f):
return self._format_float(f, raises_value_error=False)
def _format_float(self, f, raises_value_error=False):
try:
return float(f)
except (ValueError, TypeError):
if raises_value_error:
raise
else:
warnings.warn('Value must be float')
return None
def _set_int(self, i):
return self._format_int(i, raises_value_error=True)
def _get_int(self, i):
return self._format_int(i, raises_value_error=False)
def _format_int(self, i, raises_value_error=False):
try:
return int(i)
except (ValueError, TypeError):
if raises_value_error:
raise
else:
warnings.warn('Value must be integer')
return None
def _set_bool(self, b):
return self._format_bool(b, raises_value_error=True)
def _get_bool(self, b):
return self._format_bool(b, raises_value_error=False)
def _format_bool(self, b, raises_value_error=False):
if (
raises_value_error
and not isinstance(b, bool)
):
raise ValueError('Value must be bool')
return b in [True, 'True', 'true', '1', 1]
class ApiCollection(RestList):
def __init__(self, setter, iterable=(), **setter_kwargs):
self.setter = setter
self.setter_kwargs = setter_kwargs
self.extend(iterable)
@property
def _data(self):
return RestResponse.parse([x for x in self])
@property
def _as_json(self):
return json.loads(json.dumps(self, default=_encode_hook(self.__opts__)))
def append(self, item):
self.insert(len(self), item)
def insert(self, index, item):
value = self.setter(item, **self.setter_kwargs)
if value is not None:
super(ApiCollection, self).insert(index, value)
def extend(self, items):
for item in items:
self.append(item)
def __setitem__(self, index, value):
if index >= 0 and index < len(self):
self.pop(index)
self.insert(index, value)
else:
raise IndexError('list index out of range')