from registrasion.models import conditions

from registrasion.models import inventory

    model = inventory.Product

@admin.register(inventory.Category)

    model = inventory.Category

@admin.register(inventory.Product)

    model = inventory.Product

    model = conditions.DiscountForProduct

    model = conditions.DiscountForCategory

@admin.register(conditions.TimeOrStockLimitDiscount)

@admin.register(conditions.IncludedProductDiscount)

    model = conditions.VoucherDiscount

    model = conditions.VoucherFlag

@admin.register(inventory.Voucher)

    model = inventory.Voucher

@admin.register(conditions.ProductFlag)

    model = conditions.ProductFlag

@admin.register(conditions.CategoryFlag)

    model = conditions.CategoryFlag

@admin.register(conditions.TimeOrStockLimitFlag)

    model = conditions.TimeOrStockLimitFlag

from registrasion.models import commerce

from registrasion.models import conditions

from registrasion.models import inventory

            existing = commerce.Cart.objects.get(user=user, active=True)

            existing = commerce.Cart.objects.create(

            reservations.append(inventory.Voucher.RESERVATION_DURATION)

        items = commerce.ProductItem.objects.filter(cart=self.cart)

        items_in_cart = commerce.ProductItem.objects.filter(cart=self.cart)

                product_item = commerce.ProductItem.objects.get(

                commerce.ProductItem.objects.create(

        voucher = inventory.Voucher.objects.get(code=voucher_code.upper())

        active_carts = commerce.Cart.reserved_carts()

        items = commerce.ProductItem.objects.filter(cart=cart)

        discount_items = commerce.DiscountItem.objects.filter(cart=cart)

            real_discount = conditions.DiscountBase.objects.get_subclass(

        items = commerce.ProductItem.objects.filter(cart=self.cart)

        commerce.DiscountItem.objects.filter(cart=self.cart).delete()

            if isinstance(discount.clause, conditions.DiscountForCategory):

            discount_item = commerce.DiscountItem.objects.create(

from registrasion.models import commerce

from registrasion.models import inventory

            products = inventory.Product.objects.all().select_related(

                "category",

            )

        carts = commerce.Cart.objects.filter(

        items = commerce.ProductItem.objects.filter(

from registrasion.models import commerce

from registrasion.models import conditions

from registrasion.models import inventory

            conditions.CategoryFlag: CategoryConditionController,

            conditions.IncludedProductDiscount: ProductConditionController,

            conditions.ProductFlag: ProductConditionController,

            conditions.TimeOrStockLimitDiscount:

            conditions.TimeOrStockLimitFlag:

            conditions.VoucherDiscount: VoucherConditionController,

            conditions.VoucherFlag: VoucherConditionController,

            from_category = inventory.Product.objects.filter(

        carts = commerce.Cart.objects.filter(user=user, released=False)

        enabling_products = inventory.Product.objects.filter(

        products_count = commerce.ProductItem.objects.filter(

        carts = commerce.Cart.objects.filter(user=user, released=False)

        products_count = commerce.ProductItem.objects.filter(

        reserved_carts = commerce.Cart.reserved_carts()

        category_products = inventory.Product.objects.filter(

        product_items = commerce.ProductItem.objects.filter(

        discount_items = commerce.DiscountItem.objects.filter(

        carts_count = commerce.Cart.objects.filter(

from registrasion.models import commerce

        credit_note = commerce.CreditNote.objects.create(

        commerce.CreditNoteApplication.objects.create(

from registrasion.models import commerce

from registrasion.models import conditions

    category_discounts = conditions.DiscountForCategory.objects.filter(

    product_discounts = conditions.DiscountForProduct.objects.filter(

    product_category_discounts = conditions.DiscountForCategory.objects.filter(

        real_discount = conditions.DiscountBase.objects.get_subclass(

        past_uses = commerce.DiscountItem.objects.filter(

from registrasion.models import commerce

from registrasion.models import conditions

from registrasion.models import people

            invoice = commerce.Invoice.objects.exclude(

                status=commerce.Invoice.STATUS_VOID,

        invoices = commerce.Invoice.objects.filter(cart=cart).all()

            condition = conditions.DiscountForProduct.objects.get(

            condition = conditions.DiscountForCategory.objects.get(

        profile = people.AttendeeProfileBase.objects.get_subclass(

        invoice = commerce.Invoice.objects.create(

            status=commerce.Invoice.STATUS_UNPAID,

        product_items = commerce.ProductItem.objects.filter(cart=cart)

        discount_items = commerce.DiscountItem.objects.filter(cart=cart)

            line_item = commerce.LineItem.objects.create(

            line_item = commerce.LineItem.objects.create(

        payments = commerce.PaymentBase.objects.filter(invoice=self.invoice)

        num_payments = commerce.PaymentBase.objects.filter(

        if old_status == commerce.Invoice.STATUS_UNPAID:

        elif old_status == commerce.Invoice.STATUS_PAID:

        elif old_status == commerce.Invoice.STATUS_REFUNDED:

        elif old_status == commerce.Invoice.STATUS_VOID:

        self.invoice.status = commerce.Invoice.STATUS_PAID

        self.invoice.status = commerce.Invoice.STATUS_REFUNDED

        self.invoice.status = commerce.Invoice.STATUS_VOID

from registrasion.models import commerce

from registrasion.models import inventory

            all_products = inventory.Product.objects.filter(category=category)

        carts = commerce.Cart.objects.filter(

        items = commerce.ProductItem.objects.filter(

from registrasion.models import commerce

from registrasion.models import inventory

        invoices = commerce.Invoice.objects.filter(

            status=commerce.Invoice.STATUS_UNPAID,

        model = commerce.ManualCreditNoteRefund

        model = commerce.ManualPayment

        inventory.Category.RENDER_TYPE_QUANTITY: _QuantityBoxProductsForm,

        inventory.Category.RENDER_TYPE_RADIO: _RadioButtonProductsForm,

from commerce import *  # NOQA

from conditions import *  # NOQA

from inventory import *  # NOQA

from people import *  # NOQA

from . import conditions

from . import inventory

from django.contrib.auth.models import User

from django.core.exceptions import ValidationError

from django.db import models

from django.db.models import F, Q

from django.utils import timezone

from django.utils.encoding import python_2_unicode_compatible

from django.utils.translation import ugettext_lazy as _

from model_utils.managers import InheritanceManager

# Commerce Models

@python_2_unicode_compatible

class Cart(models.Model):

    ''' Represents a set of product items that have been purchased, or are

    pending purchase. '''

    class Meta:

        app_label = "registrasion"

        index_together = [

            ("active", "time_last_updated"),

            ("active", "released"),

            ("active", "user"),

            ("released", "user"),

        ]

    def __str__(self):

        return "%d rev #%d" % (self.id, self.revision)

    user = models.ForeignKey(User)

    # ProductItems (foreign key)

    vouchers = models.ManyToManyField(inventory.Voucher, blank=True)

    time_last_updated = models.DateTimeField(

        db_index=True,

    )

    reservation_duration = models.DurationField()

    revision = models.PositiveIntegerField(default=1)

    active = models.BooleanField(

        default=True,

        db_index=True,

    )

    released = models.BooleanField(

        default=False,

        db_index=True

    )  # Refunds etc

    @classmethod

    def reserved_carts(cls):

        ''' Gets all carts that are 'reserved' '''

        return Cart.objects.filter(

            (Q(active=True) &

                Q(time_last_updated__gt=(

                    timezone.now()-F('reservation_duration')

                                        ))) |

            (Q(active=False) & Q(released=False))

        )

@python_2_unicode_compatible

class ProductItem(models.Model):

    ''' Represents a product-quantity pair in a Cart. '''

    class Meta:

        app_label = "registrasion"

        ordering = ("product", )

    def __str__(self):

        return "product: %s * %d in Cart: %s" % (

            self.product, self.quantity, self.cart)

    cart = models.ForeignKey(Cart)

    product = models.ForeignKey(inventory.Product)

    quantity = models.PositiveIntegerField(db_index=True)

@python_2_unicode_compatible

class DiscountItem(models.Model):

    ''' Represents a discount-product-quantity relation in a Cart. '''

    class Meta:

        app_label = "registrasion"

        ordering = ("product", )

    def __str__(self):

        return "%s: %s * %d in Cart: %s" % (

            self.discount, self.product, self.quantity, self.cart)

    cart = models.ForeignKey(Cart)

    product = models.ForeignKey(inventory.Product)

    discount = models.ForeignKey(conditions.DiscountBase)

    quantity = models.PositiveIntegerField()

@python_2_unicode_compatible

class Invoice(models.Model):

    ''' An invoice. Invoices can be automatically generated when checking out

    a Cart, in which case, it is attached to a given revision of a Cart. '''

    class Meta:

        app_label = "registrasion"

    STATUS_UNPAID = 1

    STATUS_PAID = 2

    STATUS_REFUNDED = 3

    STATUS_VOID = 4

    STATUS_TYPES = [

        (STATUS_UNPAID, _("Unpaid")),

        (STATUS_PAID, _("Paid")),

        (STATUS_REFUNDED, _("Refunded")),

        (STATUS_VOID, _("VOID")),

    ]

    def __str__(self):

        return "Invoice #%d" % self.id

    def clean(self):

        if self.cart is not None and self.cart_revision is None:

            raise ValidationError(

                "If this is a cart invoice, it must have a revision")

    @property

    def is_unpaid(self):

        return self.status == self.STATUS_UNPAID

    @property

    def is_void(self):

        return self.status == self.STATUS_VOID

    @property

    def is_paid(self):

        return self.status == self.STATUS_PAID

    @property

    def is_refunded(self):

        return self.status == self.STATUS_REFUNDED

    # Invoice Number

    user = models.ForeignKey(User)

    cart = models.ForeignKey(Cart, null=True)

    cart_revision = models.IntegerField(

        null=True,

        db_index=True,

    )

    # Line Items (foreign key)

    status = models.IntegerField(

        choices=STATUS_TYPES,

        db_index=True,

    )

    recipient = models.CharField(max_length=1024)

    issue_time = models.DateTimeField()

    due_time = models.DateTimeField()

    value = models.DecimalField(max_digits=8, decimal_places=2)

@python_2_unicode_compatible

class LineItem(models.Model):

    ''' Line items for an invoice. These are denormalised from the ProductItems

    and DiscountItems that belong to a cart (for consistency), but also allow

    for arbitrary line items when required. '''

    class Meta:

        app_label = "registrasion"

        ordering = ("id", )

    def __str__(self):

        return "Line: %s * %d @ %s" % (

            self.description, self.quantity, self.price)

    invoice = models.ForeignKey(Invoice)

    description = models.CharField(max_length=255)

    quantity = models.PositiveIntegerField()

    price = models.DecimalField(max_digits=8, decimal_places=2)

    product = models.ForeignKey(inventory.Product, null=True, blank=True)

@python_2_unicode_compatible

class PaymentBase(models.Model):

    ''' The base payment type for invoices. Payment apps should subclass this

    class to handle implementation-specific issues. '''

    class Meta:

        ordering = ("time", )

    objects = InheritanceManager()

    def __str__(self):

        return "Payment: ref=%s amount=%s" % (self.reference, self.amount)

    invoice = models.ForeignKey(Invoice)

    time = models.DateTimeField(default=timezone.now)

    reference = models.CharField(max_length=255)

    amount = models.DecimalField(max_digits=8, decimal_places=2)

class ManualPayment(PaymentBase):

    ''' Payments that are manually entered by staff. '''

    class Meta:

        app_label = "registrasion"

class CreditNote(PaymentBase):

    ''' Credit notes represent money accounted for in the system that do not

    belong to specific invoices. They may be paid into other invoices, or

    cashed out as refunds.

    Each CreditNote may either be used to pay towards another Invoice in the

    system (by attaching a CreditNoteApplication), or may be marked as

    refunded (by attaching a CreditNoteRefund).'''

    class Meta:

        app_label = "registrasion"

    @classmethod

    def unclaimed(cls):

        return cls.objects.filter(

            creditnoteapplication=None,

            creditnoterefund=None,

        )

    @property

    def status(self):

        if self.is_unclaimed:

            return "Unclaimed"

        if hasattr(self, 'creditnoteapplication'):

            destination = self.creditnoteapplication.invoice.id

            return "Applied to invoice %d" % destination

        elif hasattr(self, 'creditnoterefund'):

            reference = self.creditnoterefund.reference

            print reference

            return "Refunded with reference: %s" % reference

        raise ValueError("This should never happen.")

    @property

    def is_unclaimed(self):

        return not (

            hasattr(self, 'creditnoterefund') or

            hasattr(self, 'creditnoteapplication')

        )

    @property

    def value(self):

        ''' Returns the value of the credit note. Because CreditNotes are

        implemented as PaymentBase objects internally, the amount is a

        negative payment against an invoice. '''

        return -self.amount

class CleanOnSave(object):

    def save(self, *a, **k):

        self.full_clean()

        super(CleanOnSave, self).save(*a, **k)

class CreditNoteApplication(CleanOnSave, PaymentBase):

    ''' Represents an application of a credit note to an Invoice. '''

    class Meta:

        app_label = "registrasion"

    def clean(self):

        if not hasattr(self, "parent"):

            return

        if hasattr(self.parent, 'creditnoterefund'):

            raise ValidationError(

                "Cannot apply a refunded credit note to an invoice"

            )

    parent = models.OneToOneField(CreditNote)

class CreditNoteRefund(CleanOnSave, models.Model):

    ''' Represents a refund of a credit note to an external payment.

    Credit notes may only be refunded in full. How those refunds are handled

    is left as an exercise to the payment app. '''

    def clean(self):

        if not hasattr(self, "parent"):

            return

        if hasattr(self.parent, 'creditnoteapplication'):

            raise ValidationError(

                "Cannot refund a credit note that has been paid to an invoice"

            )

    parent = models.OneToOneField(CreditNote)

    time = models.DateTimeField(default=timezone.now)

    reference = models.CharField(max_length=255)

class ManualCreditNoteRefund(CreditNoteRefund):

    ''' Credit notes that are entered by a staff member. '''

    class Meta:

        app_label = "registrasion"

    entered_by = models.ForeignKey(User)

import itertools

from . import inventory

from django.core.exceptions import ValidationError

from django.db import models

from django.utils.encoding import python_2_unicode_compatible

from django.utils.translation import ugettext_lazy as _

from model_utils.managers import InheritanceManager

# Product Modifiers

@python_2_unicode_compatible

class DiscountBase(models.Model):

    ''' Base class for discounts. Each subclass has controller code that

    determines whether or not the given discount is available to be added to

    the current cart. '''

    class Meta:

        app_label = "registrasion"

    objects = InheritanceManager()

    def __str__(self):

        return "Discount: " + self.description

    def effects(self):

        ''' Returns all of the effects of this discount. '''

        products = self.discountforproduct_set.all()

        categories = self.discountforcategory_set.all()

        return itertools.chain(products, categories)

    description = models.CharField(

        max_length=255,

        verbose_name=_("Description"),