154 lines
4.4 KiB
Python
154 lines
4.4 KiB
Python
import models as rego
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from django import forms
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class ManualPaymentForm(forms.ModelForm):
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class Meta:
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model = rego.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.
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class _ProductsForm(forms.Form):
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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(_ProductsForm, 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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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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)
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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, name)
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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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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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yield (
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choice_value,
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1 if ours == choice_value else 0,
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self.FIELD,
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)
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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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RENDER_TYPES = {
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rego.Category.RENDER_TYPE_QUANTITY: _QuantityBoxProductsForm,
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rego.Category.RENDER_TYPE_RADIO: _RadioButtonProductsForm,
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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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return ProductsForm
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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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