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Tax rules and reverse charge (#559)

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Tax rules and reverse charge
This commit is contained in:
Raphael Michel
2017-08-23 13:13:16 +03:00
committed by GitHub
parent b9ec5ea83c
commit 56338be13e
82 changed files with 2934 additions and 428 deletions
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88
src/pretix/base/services/cart.py
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@@ -11,9 +11,10 @@ from django.utils.translation import pgettext_lazy, ugettext as _
from pretix.base.i18n import LazyLocaleException, language
from pretix.base.models import (
CartPosition, Event, Item, ItemVariation, Voucher,
CartPosition, Event, InvoiceAddress, Item, ItemVariation, Voucher,
)
from pretix.base.models.event import SubEvent
from pretix.base.models.tax import TAXED_ZERO, TaxedPrice
from pretix.base.services.async import ProfiledTask
from pretix.base.services.locking import LockTimeoutException
from pretix.base.services.pricing import get_price
@@ -68,7 +69,7 @@ error_messages = {
class CartManager:
AddOperation = namedtuple('AddOperation', ('count', 'item', 'variation', 'price', 'voucher', 'quotas',
'addon_to', 'subevent'))
'addon_to', 'subevent', 'includes_tax'))
RemoveOperation = namedtuple('RemoveOperation', ('position',))
ExtendOperation = namedtuple('ExtendOperation', ('position', 'count', 'item', 'variation', 'price', 'voucher',
'quotas', 'subevent'))
@@ -78,7 +79,7 @@ class CartManager:
AddOperation: 30
}
def __init__(self, event: Event, cart_id: str):
def __init__(self, event: Event, cart_id: str, invoice_address: InvoiceAddress=None):
self.event = event
self.cart_id = cart_id
self.now_dt = now()
@@ -89,6 +90,7 @@ class CartManager:
self._subevents_cache = {}
self._variations_cache = {}
self._expiry = None
self.invoice_address = invoice_address
@property
def positions(self):
@@ -213,8 +215,12 @@ class CartManager:
def _get_price(self, item: Item, variation: Optional[ItemVariation],
voucher: Optional[Voucher], custom_price: Optional[Decimal],
subevent: Optional[SubEvent]):
return get_price(item, variation, voucher, custom_price, subevent, self.event.settings.display_net_prices)
subevent: Optional[SubEvent], cp_is_net: bool=None):
return get_price(
item, variation, voucher, custom_price, subevent,
custom_price_is_net=cp_is_net if cp_is_net is not None else self.event.settings.display_net_prices,
invoice_address=self.invoice_address
)
def extend_expired_positions(self):
expired = self.positions.filter(expires__lte=self.now_dt).select_related(
@@ -222,7 +228,12 @@ class CartManager:
).prefetch_related('item__quotas', 'variation__quotas')
err = None
for cp in expired:
price = self._get_price(cp.item, cp.variation, cp.voucher, cp.price, cp.subevent)
if not cp.includes_tax:
price = self._get_price(cp.item, cp.variation, cp.voucher, cp.price, cp.subevent,
cp_is_net=True)
price = TaxedPrice(net=price.net, gross=price.net, rate=0, tax=0, name='')
else:
price = self._get_price(cp.item, cp.variation, cp.voucher, cp.price, cp.subevent)
quotas = list(cp.quotas)
if not quotas:
@@ -296,7 +307,7 @@ class CartManager:
price = self._get_price(item, variation, voucher, i.get('price'), subevent)
op = self.AddOperation(
count=i['count'], item=item, variation=variation, price=price, voucher=voucher, quotas=quotas,
addon_to=False, subevent=subevent
addon_to=False, subevent=subevent, includes_tax=bool(price.rate)
)
self._check_item_constraints(op)
operations.append(op)
@@ -395,13 +406,13 @@ class CartManager:
quota_diff[quota] += 1
if price_included[cp.pk].get(item.category_id):
price = Decimal('0.00')
price = TAXED_ZERO
else:
price = self._get_price(item, variation, None, None, cp.subevent)
op = self.AddOperation(
count=1, item=item, variation=variation, price=price, voucher=None, quotas=quotas,
addon_to=cp, subevent=cp.subevent
addon_to=cp, subevent=cp.subevent, includes_tax=bool(price.rate)
)
self._check_item_constraints(op)
operations.append(op)
@@ -557,15 +568,14 @@ class CartManager:
for k in range(available_count):
new_cart_positions.append(CartPosition(
event=self.event, item=op.item, variation=op.variation,
price=op.price, expires=self._expiry,
cart_id=self.cart_id, voucher=op.voucher,
addon_to=op.addon_to if op.addon_to else None,
subevent=op.subevent
price=op.price.gross, expires=self._expiry, cart_id=self.cart_id,
voucher=op.voucher, addon_to=op.addon_to if op.addon_to else None,
subevent=op.subevent, includes_tax=op.includes_tax
))
elif isinstance(op, self.ExtendOperation):
if available_count == 1:
op.position.expires = self._expiry
op.position.price = op.price
op.position.price = op.price.gross
op.position.save()
elif available_count == 0:
op.position.delete()
@@ -591,8 +601,34 @@ class CartManager:
raise CartError(err)
def update_tax_rates(event: Event, cart_id: str, invoice_address: InvoiceAddress):
positions = CartPosition.objects.filter(
cart_id=cart_id, event=event
).select_related('item', 'item__tax_rule')
totaldiff = Decimal('0.00')
for pos in positions:
if not pos.item.tax_rule:
continue
charge_tax = pos.item.tax_rule.tax_applicable(invoice_address)
if pos.includes_tax and not charge_tax:
price = pos.item.tax(pos.price, base_price_is='gross').net
totaldiff += price - pos.price
pos.price = price
pos.includes_tax = False
pos.save(update_fields=['price', 'includes_tax'])
elif charge_tax and not pos.includes_tax:
price = pos.item.tax(pos.price, base_price_is='net').gross
totaldiff += price - pos.price
pos.price = price
pos.includes_tax = True
pos.save(update_fields=['price', 'includes_tax'])
return totaldiff
@app.task(base=ProfiledTask, bind=True, max_retries=5, default_retry_delay=1, throws=(CartError,))
def add_items_to_cart(self, event: int, items: List[dict], cart_id: str=None, locale='en') -> None:
def add_items_to_cart(self, event: int, items: List[dict], cart_id: str=None, locale='en',
invoice_address: int=None) -> None:
"""
Adds a list of items to a user's cart.
:param event: The event ID in question
@@ -602,9 +638,17 @@ def add_items_to_cart(self, event: int, items: List[dict], cart_id: str=None, lo
"""
with language(locale):
event = Event.objects.get(id=event)
ia = False
if invoice_address:
try:
ia = InvoiceAddress.objects.get(pk=invoice_address)
except InvoiceAddress.DoesNotExist:
pass
try:
try:
cm = CartManager(event=event, cart_id=cart_id)
cm = CartManager(event=event, cart_id=cart_id, invoice_address=ia)
cm.add_new_items(items)
cm.commit()
except LockTimeoutException:
@@ -655,7 +699,8 @@ def clear_cart(self, event: int, cart_id: str=None, locale='en') -> None:
@app.task(base=ProfiledTask, bind=True, max_retries=5, default_retry_delay=1, throws=(CartError,))
def set_cart_addons(self, event: int, addons: List[dict], cart_id: str=None, locale='en') -> None:
def set_cart_addons(self, event: int, addons: List[dict], cart_id: str=None, locale='en',
invoice_address: int=None) -> None:
"""
Removes a list of items from a user's cart.
:param event: The event ID in question
@@ -664,9 +709,16 @@ def set_cart_addons(self, event: int, addons: List[dict], cart_id: str=None, loc
"""
with language(locale):
event = Event.objects.get(id=event)
ia = False
if invoice_address:
try:
ia = InvoiceAddress.objects.get(pk=invoice_address)
except InvoiceAddress.DoesNotExist:
pass
try:
try:
cm = CartManager(event=event, cart_id=cart_id)
cm = CartManager(event=event, cart_id=cart_id, invoice_address=ia)
cm.set_addons(addons)
cm.commit()
except LockTimeoutException: