from django.db import models
+from django.contrib.contenttypes.models import ContentType
+from django.contrib.contenttypes import generic
from django.contrib.sites.models import Site
from django.http import HttpResponse, HttpResponseServerError, HttpResponseRedirect
+from django.core.exceptions import ViewDoesNotExist
from django.core.servers.basehttp import FileWrapper
-from philo.models.base import InheritableTreeEntity
+from django.core.urlresolvers import resolve, clear_url_caches, reverse, NoReverseMatch
+from django.template import add_to_builtins as register_templatetags
+from inspect import getargspec
+from philo.exceptions import MIDDLEWARE_NOT_CONFIGURED
+from philo.models.base import TreeEntity, Entity, QuerySetMapper, register_value_model
+from philo.utils import ContentTypeSubclassLimiter
from philo.validators import RedirectValidator
+from philo.exceptions import ViewCanNotProvideSubpath, ViewDoesNotProvideSubpaths, AncestorDoesNotExist
+from philo.signals import view_about_to_render, view_finished_rendering
-class Node(InheritableTreeEntity):
- accepts_subpath = False
+_view_content_type_limiter = ContentTypeSubclassLimiter(None)
+
+
+class Node(TreeEntity):
+ view_content_type = models.ForeignKey(ContentType, related_name='node_view_set', limit_choices_to=_view_content_type_limiter)
+ view_object_id = models.PositiveIntegerField()
+ view = generic.GenericForeignKey('view_content_type', 'view_object_id')
+
+ @property
+ def accepts_subpath(self):
+ if self.view:
+ return self.view.accepts_subpath
+ return False
+
+ def render_to_response(self, request, extra_context=None):
+ return self.view.render_to_response(request, extra_context)
- def render_to_response(self, request, path=None, subpath=None):
- return HttpResponseServerError()
+ def get_absolute_url(self):
+ try:
+ root = Site.objects.get_current().root_node
+ except Site.DoesNotExist:
+ root = None
+ try:
+ path = self.get_path(root=root)
+ if path:
+ path += '/'
+ root_url = reverse('philo-root')
+ return '%s%s' % (root_url, path)
+ except AncestorDoesNotExist, ViewDoesNotExist:
+ return None
+
class Meta:
- unique_together = (('parent', 'slug'),)
app_label = 'philo'
models.ForeignKey(Node, related_name='sites', null=True, blank=True).contribute_to_class(Site, 'root_node')
-class MultiNode(Node):
+class View(Entity):
+ nodes = generic.GenericRelation(Node, content_type_field='view_content_type', object_id_field='view_object_id')
+
+ accepts_subpath = False
+
+ def get_subpath(self, obj):
+ if not self.accepts_subpath:
+ raise ViewDoesNotProvideSubpaths
+
+ view_name, args, kwargs = self.get_reverse_params(obj)
+ try:
+ return reverse(view_name, args=args, kwargs=kwargs, urlconf=self)
+ except NoReverseMatch:
+ raise ViewCanNotProvideSubpath
+
+ def get_reverse_params(self, obj):
+ """This method should return a view_name, args, kwargs tuple suitable for reversing a url for the given obj using self as the urlconf."""
+ raise NotImplementedError("View subclasses must implement get_reverse_params to support subpaths.")
+
+ def attributes_with_node(self, node):
+ return QuerySetMapper(self.attribute_set, passthrough=node.attributes)
+
+ def render_to_response(self, request, extra_context=None):
+ if not hasattr(request, 'node'):
+ raise MIDDLEWARE_NOT_CONFIGURED
+
+ extra_context = extra_context or {}
+ view_about_to_render.send(sender=self, request=request, extra_context=extra_context)
+ response = self.actually_render_to_response(request, extra_context)
+ view_finished_rendering.send(sender=self, response=response)
+ return response
+
+ def actually_render_to_response(self, request, extra_context=None):
+ raise NotImplementedError('View subclasses must implement actually_render_to_response.')
+
+ class Meta:
+ abstract = True
+
+
+_view_content_type_limiter.cls = View
+
+
+class MultiView(View):
accepts_subpath = True
- urlpatterns = []
+ @property
+ def urlpatterns(self):
+ raise NotImplementedError("MultiView subclasses must implement urlpatterns.")
- def render_to_response(self, request, path=None, subpath=None):
+ def actually_render_to_response(self, request, extra_context=None):
+ clear_url_caches()
+ subpath = request.node.subpath
if not subpath:
subpath = ""
subpath = "/" + subpath
- from django.core.urlresolvers import resolve
view, args, kwargs = resolve(subpath, urlconf=self)
+ view_args = getargspec(view)
+ if extra_context is not None and ('extra_context' in view_args[0] or view_args[2] is not None):
+ if 'extra_context' in kwargs:
+ extra_context.update(kwargs['extra_context'])
+ kwargs['extra_context'] = extra_context
return view(request, *args, **kwargs)
+ def reverse(self, view_name, args=None, kwargs=None, node=None):
+ """Shortcut method to handle the common pattern of getting the absolute url for a multiview's
+ subpaths."""
+ subpath = reverse(view_name, urlconf=self, args=args or [], kwargs=kwargs or {})
+ if node is not None:
+ return '/%s/%s/' % (node.get_absolute_url().strip('/'), subpath.strip('/'))
+ return subpath
+
+ def get_context(self):
+ """Hook for providing instance-specific context - such as the value of a Field - to all views."""
+ return {}
+
+ def basic_view(self, field_name):
+ """
+ Given the name of a field on ``self``, accesses the value of
+ that field and treats it as a ``View`` instance. Creates a
+ basic context based on self.get_context() and any extra_context
+ that was passed in, then calls the ``View`` instance's
+ render_to_response() method. This method is meant to be called
+ to return a view function appropriate for urlpatterns.
+ """
+ field = self._meta.get_field(field_name)
+ view = getattr(self, field.name, None)
+
+ def inner(request, extra_context=None, **kwargs):
+ if not view:
+ raise Http404
+ context = self.get_context()
+ context.update(extra_context or {})
+ return view.render_to_response(request, extra_context=context)
+
+ return inner
+
class Meta:
abstract = True
- app_label = 'philo'
-class Redirect(Node):
+class Redirect(View):
STATUS_CODES = (
(302, 'Temporary'),
(301, 'Permanent'),
)
- target = models.CharField(max_length=200,validators=[RedirectValidator()])
+ target = models.CharField(max_length=200, validators=[RedirectValidator()])
status_code = models.IntegerField(choices=STATUS_CODES, default=302, verbose_name='redirect type')
- def render_to_response(self, request, path=None, subpath=None):
+ def actually_render_to_response(self, request, extra_context=None):
response = HttpResponseRedirect(self.target)
response.status_code = self.status_code
return response
app_label = 'philo'
-class File(Node):
+class File(View):
""" For storing arbitrary files """
+
mimetype = models.CharField(max_length=255)
file = models.FileField(upload_to='philo/files/%Y/%m/%d')
- def render_to_response(self, request, path=None, subpath=None):
+ def actually_render_to_response(self, request, extra_context=None):
wrapper = FileWrapper(self.file)
response = HttpResponse(wrapper, content_type=self.mimetype)
response['Content-Length'] = self.file.size
return response
class Meta:
- app_label = 'philo'
\ No newline at end of file
+ app_label = 'philo'
+
+ def __unicode__(self):
+ return self.file.name
+
+
+register_templatetags('philo.templatetags.nodes')
+register_value_model(Node)
\ No newline at end of file
git.ithinksw.org / philo.git / blobdiff