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Code Issues Packages Projects Releases Wiki Activity

Discounts (#2510)

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Raphael Michel
2022-04-27 14:43:16 +02:00
committed by GitHub
parent 7730cc6170
commit 6fee0ac0a9
56 changed files with 4159 additions and 480 deletions
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111
src/pretix/base/services/pricing.py
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@@ -20,39 +20,30 @@
# <https://www.gnu.org/licenses/>.
#
from decimal import Decimal
from typing import List, Optional, Tuple
from django.db.models import Q
from django.utils.timezone import now
from pretix.base.decimal import round_decimal
from pretix.base.models import (
AbstractPosition, InvoiceAddress, Item, ItemAddOn, ItemVariation, Voucher,
)
from pretix.base.models.event import SubEvent
from pretix.base.models.event import Event, SubEvent
from pretix.base.models.tax import TAXED_ZERO, TaxedPrice, TaxRule
def get_price(item: Item, variation: ItemVariation = None,
voucher: Voucher = None, custom_price: Decimal = None,
subevent: SubEvent = None, custom_price_is_net: bool = False,
custom_price_is_tax_rate: Decimal=None,
custom_price_is_tax_rate: Decimal = None,
addon_to: AbstractPosition = None, invoice_address: InvoiceAddress = None,
force_custom_price: bool = False, bundled_sum: Decimal = Decimal('0.00'),
max_discount: Decimal = None, tax_rule=None) -> TaxedPrice:
if addon_to:
try:
iao = addon_to.item.addons.get(addon_category_id=item.category_id)
if iao.price_included:
return TAXED_ZERO
except ItemAddOn.DoesNotExist:
pass
if is_included_for_free(item, addon_to):
return TAXED_ZERO
price = item.default_price
if subevent and item.pk in subevent.item_price_overrides:
price = subevent.item_price_overrides[item.pk]
if variation is not None:
if variation.default_price is not None:
price = variation.default_price
if subevent and variation.pk in subevent.var_price_overrides:
price = subevent.var_price_overrides[variation.pk]
price = get_listed_price(item, variation, subevent)
if voucher:
price = voucher.calculate_price(price, max_discount=max_discount)
@@ -85,10 +76,10 @@ def get_price(item: Item, variation: ItemVariation = None,
price = tax_rule.tax(price, invoice_address=invoice_address)
if custom_price_is_net:
price = tax_rule.tax(max(custom_price, price.net), base_price_is='net',
price = tax_rule.tax(max(custom_price, price.net), base_price_is='net', override_tax_rate=price.rate,
invoice_address=invoice_address, subtract_from_gross=bundled_sum)
else:
price = tax_rule.tax(max(custom_price, price.gross), base_price_is='gross', gross_price_is_tax_rate=custom_price_is_tax_rate,
price = tax_rule.tax(max(custom_price, price.gross), base_price_is='gross', override_tax_rate=price.rate,
invoice_address=invoice_address, subtract_from_gross=bundled_sum)
else:
price = tax_rule.tax(price, invoice_address=invoice_address, subtract_from_gross=bundled_sum)
@@ -98,3 +89,83 @@ def get_price(item: Item, variation: ItemVariation = None,
price.tax = price.gross - price.net
return price
def is_included_for_free(item: Item, addon_to: AbstractPosition):
if addon_to:
try:
iao = addon_to.item.addons.get(addon_category_id=item.category_id)
if iao.price_included:
return True
except ItemAddOn.DoesNotExist:
pass
return False
def get_listed_price(item: Item, variation: ItemVariation = None, subevent: SubEvent = None) -> Decimal:
price = item.default_price
if subevent and item.pk in subevent.item_price_overrides:
price = subevent.item_price_overrides[item.pk]
if variation is not None:
if variation.default_price is not None:
price = variation.default_price
if subevent and variation.pk in subevent.var_price_overrides:
price = subevent.var_price_overrides[variation.pk]
return price
def get_line_price(price_after_voucher: Decimal, custom_price_input: Decimal, custom_price_input_is_net: bool,
tax_rule: TaxRule, invoice_address: InvoiceAddress, bundled_sum: Decimal) -> TaxedPrice:
if not tax_rule:
tax_rule = TaxRule(
name='',
rate=Decimal('0.00'),
price_includes_tax=True,
eu_reverse_charge=False,
)
if custom_price_input:
price = tax_rule.tax(price_after_voucher, invoice_address=invoice_address)
if custom_price_input_is_net:
price = tax_rule.tax(max(custom_price_input, price.net), base_price_is='net', override_tax_rate=price.rate,
invoice_address=invoice_address, subtract_from_gross=bundled_sum)
else:
price = tax_rule.tax(max(custom_price_input, price.gross), base_price_is='gross', override_tax_rate=price.rate,
invoice_address=invoice_address, subtract_from_gross=bundled_sum)
else:
price = tax_rule.tax(price_after_voucher, invoice_address=invoice_address, subtract_from_gross=bundled_sum)
return price
def apply_discounts(event: Event, sales_channel: str,
positions: List[Tuple[int, Optional[int], Decimal, bool, bool]]) -> List[Decimal]:
"""
Applies any dynamic discounts to a cart
:param event: Event the cart belongs to
:param sales_channel: Sales channel the cart was created with
:param positions: Tuple of the form ``(item_id, subevent_id, line_price_gross, is_addon_to, is_bundled, voucher_discount)``
:return: A list of ``(new_gross_price, discount)`` tuples in the same order as the input
"""
new_prices = {}
discount_qs = event.discounts.filter(
Q(available_from__isnull=True) | Q(available_from__lte=now()),
Q(available_until__isnull=True) | Q(available_until__gte=now()),
sales_channels__contains=sales_channel,
active=True,
).prefetch_related('condition_limit_products').order_by('position', 'pk')
for discount in discount_qs:
result = discount.apply({
idx: (item_id, subevent_id, line_price_gross, is_addon_to, voucher_discount)
for idx, (item_id, subevent_id, line_price_gross, is_addon_to, is_bundled, voucher_discount) in enumerate(positions)
if not is_bundled and idx not in new_prices
})
for k in result.keys():
result[k] = (result[k], discount)
new_prices.update(result)
return [new_prices.get(idx, (p[2], None)) for idx, p in enumerate(positions)]