/
core.py
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/
core.py
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# -*- coding: utf-8 -*-
"""
resources.core
~~~~~~~~~~~~~~
This omdule provides the core resources system.
"""
import warnings
from uuid import uuid4
__all__ = ('Resource', 'Interface', 'Element')
def method_not_allowed(f):
def decorator(*args, **kwargs):
try:
return f(*args, **kwargs)
except Exception, why:
warnings.warn(str(why))
return None
return decorator
class Resource(object):
"""A RESTful Resource."""
def __init__(self, name=None, interface=None):
self.name = name
self.interface = interface
self.uuid = uuid4().hex
self.contains = None
super(Resource, self).__init__()
def __repr__(self):
return '<resource \'{0}\'>'.format(self.name)
class Collection(object):
"""A RESTful Collection."""
def __init__(self, resource=None):
self.resource = resource
self.uuid = uuid4().hex
self.ri = None
super(Collection, self).__init__()
def content(content_type):
pass
@method_not_allowed
def get(self, **options):
# fire pre get element get hook
r = self.collection_get(self.ri, **options)
# fire post get element get hook
return r
@method_not_allowed
def put(self, data, **options):
r = self.collection_put(self.ri, data, **options)
return r
@method_not_allowed
def patch(self, data, **options):
r = self.collection_patch(self.ri, data, **options)
return r
@method_not_allowed
def post(self, data, **options):
r = self.element_post(self.ri, data, **options)
return r
@method_not_allowed
def delete(self, **options):
r = self.element_delete(self.ri, **options)
return r
class Element(object):
"""A RESTful Element."""
def __init__(self, resource=None, collection=None):
self.resource = resource
self.collection = collection
self.uuid = uuid4().hex
self.ri = None
super(Element, self).__init__()
def content(content_type):
pass
@method_not_allowed
def get(self, **options):
# fire pre get element get hook
r = self.element_get(self.ri, **options)
# fire post get element get hook
return r
@method_not_allowed
def put(self, data, **options):
r = self.element_put(self.ri, data, **options)
return r
@method_not_allowed
def patch(self, data, **options):
r = self.element_patch(self.ri, data, **options)
return r
@method_not_allowed
def post(self, data, **options):
r = self.element_post(self.ri, data, **options)
return r
@method_not_allowed
def delete(self, **options):
r = self.element_delete(self.ri, **options)
return r
class Interface(object):
"""The RESTful API Interface."""
resource = Resource()
def __init__(self):
self.resources = dict()
self.uuid = uuid4().hex
def __repr__(self):
return '<interface [{0}]>'.format(', '.join(self.resources.keys()))
def __getattribute__(self, key):
if key not in ['resources']:
try:
return object.__getattribute__(self, key)
except AttributeError:
pass
if key in self.resources:
return self.resources.get(key)
return object.__getattribute__(self, key)
def map(self, key, resource=None, is_collection=True):
"""Maps a given resource to the given namespace.
If map is None (not provided), returns decorator.
"""
if resource:
self.resources[key] = resource(interface=self, name=key)
if is_collection:
self.resources[key].contains = Collection(resource=self)
else:
self.resources[key].contains = Element(resource=self)
else:
# Assume decorator usage.
def decorator(r):
self.map(key, resource=r, is_collection=is_collection)
return r
return decorator