Initial new page admin commit. Working on faking the admin out through inlines instea...

[philo.git] / forms.py

diff --git a/forms.py b/forms.py
index 907e54d..5f9e7b1 100644 (file)
--- a/forms.py
+++ b/forms.py
@@ -1,6 +1,8 @@
-from django.forms.models import model_to_dict, fields_for_model, ModelFormMetaclass, ModelForm
+from django.core.exceptions import ValidationError, ObjectDoesNotExist
+from django.forms.models import model_to_dict, fields_for_model, ModelFormMetaclass, ModelForm, BaseInlineFormSet
+from django.template import loader, loader_tags, TemplateDoesNotExist, Context, Template as DjangoTemplate
 from django.utils.datastructures import SortedDict
-from philo.models import Entity
+from philo.models import Entity, Template
 from philo.models.fields import RelationshipField
 from philo.utils import fattr
 
@@ -86,4 +88,94 @@ class EntityForm(EntityFormBase): # Would inherit from ModelForm directly if it
                        instance.save()
                        self.save_m2m()
                
-               return instance
\ No newline at end of file
+               return instance
+
+
+def validate_template(template):
+       """
+       Makes sure that the template and all included or extended templates are valid.
+       """ 
+       for node in template.nodelist:
+               try:
+                       if isinstance(node, loader_tags.ExtendsNode):
+                               extended_template = node.get_parent(Context())
+                               validate_template(extended_template)
+                       elif isinstance(node, loader_tags.IncludeNode):
+                               included_template = loader.get_template(node.template_name.resolve(Context()))
+                               validate_template(extended_template)
+               except Exception, e:
+                       raise ValidationError("Template code invalid. Error was: %s: %s" % (e.__class__.__name__, e))
+
+
+class TemplateForm(ModelForm):
+       def clean_code(self):
+               code = self.cleaned_data['code']
+               try:
+                       t = DjangoTemplate(code)
+               except Exception, e:
+                       raise ValidationError("Template code invalid. Error was: %s: %s" % (e.__class__.__name__, e))
+
+               validate_template(t)
+               return code
+
+       class Meta:
+               model = Template
+
+
+class ContainerInlineFormSet(BaseInlineFormSet):
+       def __init__(self, containers, data=None, files=None, instance=None, save_as_new=False, prefix=None, queryset=None):
+               # Unfortunately, I need to add some things to BaseInline between its __init__ and its super call, so
+               # a lot of this is repetition.
+               
+               # Start cribbed from BaseInline
+               from django.db.models.fields.related import RelatedObject
+               self.save_as_new = save_as_new
+               # is there a better way to get the object descriptor?
+               self.rel_name = RelatedObject(self.fk.rel.to, self.model, self.fk).get_accessor_name()
+               if self.fk.rel.field_name == self.fk.rel.to._meta.pk.name:
+                       backlink_value = self.instance
+               else:
+                       backlink_value = getattr(self.instance, self.fk.rel.field_name)
+               if queryset is None:
+                       queryset = self.model._default_manager
+               qs = queryset.filter(**{self.fk.name: backlink_value}).filter(name__in=containers)
+               # End cribbed from BaseInline
+               
+               self.container_instances = []
+               for container in qs:
+                       self.container_instances.append(container)
+                       containers.remove(container.name)
+               self.extra_containers = containers
+               self.extra = len(self.extra_containers)
+               
+               super(BaseInlineFormSet, self).__init__(data, files, prefix, qs)
+       
+       def _construct_form(self, i, **kwargs):
+               if i > self.initial_form_count(): # and not kwargs.get('instance'):
+                       kwargs['instance'] = self.model(name=self.extra_containers[i - self.initial_form_count() - 1])
+               
+               return super(ContainerInlineFormSet, self)._construct_form(i, **kwargs)
+
+
+class ContentletInlineFormSet(ContainerInlineFormSet):
+       def __init__(self, data=None, files=None, instance=None, save_as_new=False, prefix=None, queryset=None):
+               if instance is None:
+                       self.instance = self.fk.rel.to()
+                       containers = []
+               else:
+                       self.instance = instance
+                       containers = list(self.instance.containers[0])
+       
+               super(ContentletInlineFormSet, self).__init__(containers, data, files, instance, save_as_new, prefix, queryset) 
+
+
+class ContentReferenceInlineFormSet(ContainerInlineFormSet):
+       def __init__(self, data=None, files=None, instance=None, save_as_new=False, prefix=None, queryset=None):
+               if instance is None:
+                       self.instance = self.fk.rel.to()
+                       containers = []
+               else:
+                       self.instance = instance
+                       containers = list(self.instance.containers[1])
+       
+               super(ContentReferenceInlineFormSet, self).__init__(containers, data, files, instance, save_as_new, prefix, queryset)
\ No newline at end of file