396 lines
12 KiB
Python
396 lines
12 KiB
Python
from registrasion.controllers.product import ProductController
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from registrasion.models import commerce
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from registrasion.models import inventory
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from django import forms
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from django.core.exceptions import ValidationError
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class ApplyCreditNoteForm(forms.Form):
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def __init__(self, user, *a, **k):
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''' User: The user whose invoices should be made available as
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choices. '''
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self.user = user
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super(ApplyCreditNoteForm, self).__init__(*a, **k)
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self.fields["invoice"].choices = self._unpaid_invoices_for_user
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def _unpaid_invoices_for_user(self):
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invoices = commerce.Invoice.objects.filter(
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status=commerce.Invoice.STATUS_UNPAID,
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user=self.user,
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)
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return [
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(invoice.id, "Invoice %(id)d - $%(value)d" % invoice.__dict__)
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for invoice in invoices
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]
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invoice = forms.ChoiceField(
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required=True,
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)
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class CancellationFeeForm(forms.Form):
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percentage = forms.DecimalField(
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required=True,
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min_value=0,
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max_value=100,
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)
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class ManualCreditNoteRefundForm(forms.ModelForm):
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class Meta:
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model = commerce.ManualCreditNoteRefund
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fields = ["reference"]
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class ManualPaymentForm(forms.ModelForm):
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class Meta:
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model = commerce.ManualPayment
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fields = ["reference", "amount"]
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# Products forms -- none of these have any fields: they are to be subclassed
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# and the fields added as needs be. ProductsForm (the function) is responsible
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# for the subclassing.
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def ProductsForm(category, products):
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''' Produces an appropriate _ProductsForm subclass for the given render
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type. '''
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# Each Category.RENDER_TYPE value has a subclass here.
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cat = inventory.Category
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RENDER_TYPES = {
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cat.RENDER_TYPE_QUANTITY: _QuantityBoxProductsForm,
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cat.RENDER_TYPE_RADIO: _RadioButtonProductsForm,
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cat.RENDER_TYPE_ITEM_QUANTITY: _ItemQuantityProductsForm,
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}
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# Produce a subclass of _ProductsForm which we can alter the base_fields on
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class ProductsForm(RENDER_TYPES[category.render_type]):
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pass
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ProductsForm.set_fields(category, products)
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if category.render_type == inventory.Category.RENDER_TYPE_ITEM_QUANTITY:
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ProductsForm = forms.formset_factory(
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ProductsForm,
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formset=_ItemQuantityProductsFormSet,
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)
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return ProductsForm
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class _HasProductsFields(object):
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PRODUCT_PREFIX = "product_"
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''' Base class for product entry forms. '''
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def __init__(self, *a, **k):
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if "product_quantities" in k:
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initial = self.initial_data(k["product_quantities"])
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k["initial"] = initial
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del k["product_quantities"]
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super(_HasProductsFields, self).__init__(*a, **k)
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@classmethod
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def field_name(cls, product):
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return cls.PRODUCT_PREFIX + ("%d" % product.id)
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@classmethod
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def set_fields(cls, category, products):
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''' Sets the base_fields on this _ProductsForm to allow selecting
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from the provided products. '''
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pass
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@classmethod
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def initial_data(cls, product_quantites):
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''' Prepares initial data for an instance of this form.
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product_quantities is a sequence of (product,quantity) tuples '''
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return {}
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def product_quantities(self):
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''' Yields a sequence of (product, quantity) tuples from the
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cleaned form data. '''
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return iter([])
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def add_product_error(self, product, error):
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''' Adds an error to the given product's field '''
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''' if product in field_names:
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field = field_names[product]
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elif isinstance(product, inventory.Product):
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return
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else:
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field = None '''
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self.add_error(self.field_name(product), error)
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class _ProductsForm(_HasProductsFields, forms.Form):
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pass
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class _QuantityBoxProductsForm(_ProductsForm):
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''' Products entry form that allows users to enter quantities
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of desired products. '''
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@classmethod
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def set_fields(cls, category, products):
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for product in products:
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if product.description:
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help_text = "$%d each -- %s" % (
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product.price,
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product.description,
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)
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else:
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help_text = "$%d each" % product.price
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field = forms.IntegerField(
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label=product.name,
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help_text=help_text,
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min_value=0,
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max_value=500, # Issue #19. We should figure out real limit.
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)
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cls.base_fields[cls.field_name(product)] = field
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@classmethod
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def initial_data(cls, product_quantities):
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initial = {}
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for product, quantity in product_quantities:
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initial[cls.field_name(product)] = quantity
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return initial
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def product_quantities(self):
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for name, value in self.cleaned_data.items():
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if name.startswith(self.PRODUCT_PREFIX):
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product_id = int(name[len(self.PRODUCT_PREFIX):])
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yield (product_id, value)
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class _RadioButtonProductsForm(_ProductsForm):
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''' Products entry form that allows users to enter quantities
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of desired products. '''
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FIELD = "chosen_product"
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@classmethod
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def set_fields(cls, category, products):
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choices = []
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for product in products:
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choice_text = "%s -- $%d" % (product.name, product.price)
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choices.append((product.id, choice_text))
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if not category.required:
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choices.append((0, "No selection"))
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cls.base_fields[cls.FIELD] = forms.TypedChoiceField(
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label=category.name,
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widget=forms.RadioSelect,
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choices=choices,
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empty_value=0,
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coerce=int,
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)
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@classmethod
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def initial_data(cls, product_quantities):
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initial = {}
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for product, quantity in product_quantities:
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if quantity > 0:
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initial[cls.FIELD] = product.id
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break
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return initial
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def product_quantities(self):
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ours = self.cleaned_data[self.FIELD]
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choices = self.fields[self.FIELD].choices
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for choice_value, choice_display in choices:
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if choice_value == 0:
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continue
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yield (
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choice_value,
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1 if ours == choice_value else 0,
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)
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def add_product_error(self, product, error):
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self.add_error(self.FIELD, error)
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class _ItemQuantityProductsForm(_ProductsForm):
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''' Products entry form that allows users to select a product type, and
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enter a quantity of that product. This version _only_ allows a single
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product type to be purchased. This form is usually used in concert with
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the _ItemQuantityProductsFormSet to allow selection of multiple
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products.'''
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CHOICE_FIELD = "choice"
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QUANTITY_FIELD = "quantity"
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@classmethod
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def set_fields(cls, category, products):
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choices = []
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if not category.required:
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choices.append((0, "---"))
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for product in products:
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choice_text = "%s -- $%d each" % (product.name, product.price)
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choices.append((product.id, choice_text))
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cls.base_fields[cls.CHOICE_FIELD] = forms.TypedChoiceField(
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label=category.name,
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widget=forms.Select,
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choices=choices,
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initial=0,
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empty_value=0,
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coerce=int,
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)
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cls.base_fields[cls.QUANTITY_FIELD] = forms.IntegerField(
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label="Quantity", # TODO: internationalise
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min_value=0,
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max_value=500, # Issue #19. We should figure out real limit.
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)
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@classmethod
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def initial_data(cls, product_quantities):
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initial = {}
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for product, quantity in product_quantities:
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if quantity > 0:
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initial[cls.CHOICE_FIELD] = product.id
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initial[cls.QUANTITY_FIELD] = quantity
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break
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return initial
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def product_quantities(self):
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our_choice = self.cleaned_data[self.CHOICE_FIELD]
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our_quantity = self.cleaned_data[self.QUANTITY_FIELD]
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choices = self.fields[self.CHOICE_FIELD].choices
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for choice_value, choice_display in choices:
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if choice_value == 0:
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continue
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yield (
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choice_value,
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our_quantity if our_choice == choice_value else 0,
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)
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def add_product_error(self, product, error):
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if self.CHOICE_FIELD not in self.cleaned_data:
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return
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if product.id == self.cleaned_data[self.CHOICE_FIELD]:
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self.add_error(self.CHOICE_FIELD, error)
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self.add_error(self.QUANTITY_FIELD, error)
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class _ItemQuantityProductsFormSet(_HasProductsFields, forms.BaseFormSet):
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@classmethod
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def set_fields(cls, category, products):
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raise ValueError("set_fields must be called on the underlying Form")
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@classmethod
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def initial_data(cls, product_quantities):
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''' Prepares initial data for an instance of this form.
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product_quantities is a sequence of (product,quantity) tuples '''
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f = [
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{
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_ItemQuantityProductsForm.CHOICE_FIELD: product.id,
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_ItemQuantityProductsForm.QUANTITY_FIELD: quantity,
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}
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for product, quantity in product_quantities
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if quantity > 0
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]
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return f
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def product_quantities(self):
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''' Yields a sequence of (product, quantity) tuples from the
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cleaned form data. '''
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products = set()
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# Track everything so that we can yield some zeroes
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all_products = set()
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for form in self:
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if form.empty_permitted and not form.cleaned_data:
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# This is the magical empty form at the end of the list.
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continue
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for product, quantity in form.product_quantities():
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all_products.add(product)
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if quantity == 0:
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continue
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if product in products:
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form.add_error(
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_ItemQuantityProductsForm.CHOICE_FIELD,
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"You may only choose each product type once.",
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)
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form.add_error(
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_ItemQuantityProductsForm.QUANTITY_FIELD,
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"You may only choose each product type once.",
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)
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products.add(product)
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yield product, quantity
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for product in (all_products - products):
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yield product, 0
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def add_product_error(self, product, error):
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for form in self.forms:
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form.add_product_error(product, error)
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@property
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def errors(self):
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_errors = super(_ItemQuantityProductsFormSet, self).errors
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if False not in [not form.errors for form in self.forms]:
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return []
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else:
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return _errors
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class VoucherForm(forms.Form):
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voucher = forms.CharField(
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label="Voucher code",
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help_text="If you have a voucher code, enter it here",
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required=False,
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)
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def staff_products_form_factory(user):
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''' Creates a StaffProductsForm that restricts the available products to
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those that are available to a user. '''
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products = inventory.Product.objects.all()
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products = ProductController.available_products(user, products=products)
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product_ids = [product.id for product in products]
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product_set = inventory.Product.objects.filter(id__in=product_ids)
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class StaffProductsForm(forms.Form):
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''' Form for allowing staff to add an item to a user's cart. '''
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product = forms.ModelChoiceField(
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widget=forms.Select,
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queryset=product_set,
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)
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quantity = forms.IntegerField(
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min_value=0,
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)
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return StaffProductsForm
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def staff_products_formset_factory(user):
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''' Creates a formset of StaffProductsForm for the given user. '''
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form_type = staff_products_form_factory(user)
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return forms.formset_factory(form_type)
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