# This file is part of Shuup.
#
# Copyright (c) 2012-2017, Shoop Commerce Ltd. All rights reserved.
#
# This source code is licensed under the OSL-3.0 license found in the
# LICENSE file in the root directory of this source tree.
import random
import string
from django.conf import settings
from django.core.exceptions import ValidationError
from django.db import models
from django.db.models import Q
from django.utils.encoding import force_text, python_2_unicode_compatible
from django.utils.timezone import now
from django.utils.translation import ugettext_lazy as _
from enumfields import Enum
from parler.models import TranslatableModel, TranslatedFields
from shuup.campaigns.consts import (
CAMPAIGNS_CACHE_NAMESPACE, CATALOG_FILTER_CACHE_NAMESPACE,
CONTEXT_CONDITION_CACHE_NAMESPACE
)
from shuup.campaigns.utils.campaigns import get_product_ids_and_quantities
from shuup.campaigns.utils.matcher import get_matching_for_product
from shuup.core import cache
from shuup.core.fields import InternalIdentifierField
from shuup.core.models import Order, Shop
from shuup.core.utils import context_cache
from shuup.utils.analog import define_log_model
from shuup.utils.properties import MoneyPropped
[docs]class CampaignType(Enum):
CATALOG = 1
BASKET = 2
[docs]class CampaignQueryset(models.QuerySet):
[docs] def available(self, shop=None):
query = Q(
Q(active=True) &
(Q(start_datetime__isnull=True) | Q(start_datetime__lte=now())) &
(Q(end_datetime__isnull=True) | Q(end_datetime__gte=now()))
)
if shop:
query &= Q(shop=shop)
return self.filter(query)
[docs]class Campaign(MoneyPropped, TranslatableModel):
admin_url_suffix = None
shop = models.ForeignKey(Shop, verbose_name=_("shop"), help_text=_("The shop where the campaign is active."))
name = models.CharField(max_length=120, verbose_name=_("name"), help_text=_("The name for this campaign."))
# translations in subclass
identifier = InternalIdentifierField(unique=True)
active = models.BooleanField(default=False, verbose_name=_("active"), help_text=_(
"Check this if the campaign is currently active. Please also set a start and end date."
))
start_datetime = models.DateTimeField(null=True, blank=True, verbose_name=_("start date and time"), help_text=_(
"The date and time the campaign starts. This is only applicable if the campaign is marked as active."
))
end_datetime = models.DateTimeField(null=True, blank=True, verbose_name=_("end date and time"), help_text=_(
"The date and time the campaign ends. This is only applicable if the campaign is marked as active."
))
created_by = models.ForeignKey(
settings.AUTH_USER_MODEL, blank=True, null=True,
related_name="+", on_delete=models.SET_NULL,
verbose_name=_("created by"))
modified_by = models.ForeignKey(
settings.AUTH_USER_MODEL, blank=True, null=True,
related_name="+", on_delete=models.SET_NULL,
verbose_name=_("modified by"))
created_on = models.DateTimeField(auto_now_add=True, editable=False, verbose_name=_("created on"))
modified_on = models.DateTimeField(auto_now=True, editable=False, verbose_name=_("modified on"))
objects = CampaignQueryset.as_manager()
[docs] def save(self, *args, **kwargs):
super(Campaign, self).save(*args, **kwargs)
cache.bump_version(CAMPAIGNS_CACHE_NAMESPACE)
cache.bump_version(CONTEXT_CONDITION_CACHE_NAMESPACE)
cache.bump_version(CATALOG_FILTER_CACHE_NAMESPACE)
[docs] def is_available(self):
if not self.active: # move to manager?
return False
if self.start_datetime and self.end_datetime:
if self.start_datetime <= now() <= self.end_datetime:
return True
return False
elif self.start_datetime and not self.end_datetime:
if self.start_datetime > now():
return False
elif not self.start_datetime and self.end_datetime:
if self.end_datetime < now():
return False
return True
@property
def type(self):
return CampaignType.BASKET if isinstance(self, BasketCampaign) else CampaignType.CATALOG
[docs]class CatalogCampaign(Campaign):
_queryset = None
admin_url_suffix = "catalog_campaign"
conditions = models.ManyToManyField('ContextCondition', blank=True, related_name='campaign')
filters = models.ManyToManyField('CatalogFilter', blank=True, related_name='campaign')
translations = TranslatedFields(public_name=models.CharField(max_length=120, blank=True, help_text=_(
"The campaign name to show in the store front."
)))
def __str__(self):
return force_text(_("Catalog Campaign: %(name)s" % dict(name=self.name)))
[docs] def save(self, *args, **kwargs):
super(CatalogCampaign, self).save(*args, **kwargs)
self.filters.update(active=self.active)
for f in self.filters.all():
for matching_product in f.get_matching_shop_products():
context_cache.bump_cache_for_shop_product(matching_product)
self.conditions.update(active=self.active)
[docs] def rules_match(self, context, shop_product, matching_catalog_filters, matching_context_conditions):
if not self.is_available():
return False
# If rule has filters, all of them has to match
for filter_pk in self.filters.values_list("pk", flat=True):
if filter_pk not in matching_catalog_filters:
return False
# All filters match so let's check that also all the conditions match
for condition_pk in self.conditions.values_list("pk", flat=True):
if condition_pk not in matching_context_conditions:
return False
return True
@classmethod
[docs] def get_for_product(cls, shop_product):
matching_filters = get_matching_for_product(shop_product, provide_category="campaign_catalog_filter")
matching_conditions = get_matching_for_product(shop_product, provide_category="campaign_context_condition")
query_filter = Q(Q(filters__in=matching_filters) | Q(conditions__in=matching_conditions))
return cls.objects.available(shop=shop_product.shop).filter(query_filter).distinct()
@classmethod
[docs] def get_matching(cls, context, shop_product):
prod_ctx_cache_elements = dict(
customer=context.customer.pk or 0,
shop=context.shop.pk,
product_id=shop_product.pk)
namespace = CAMPAIGNS_CACHE_NAMESPACE
key = "%s:%s" % (namespace, hash(frozenset(prod_ctx_cache_elements.items())))
cached_matching = cache.get(key, None)
if cached_matching is not None:
return cached_matching
from shuup.campaigns.models.matching import get_matching_context_conditions, get_matching_catalog_filters
matching_context_conditions = get_matching_context_conditions(context)
matching_catalog_filters = get_matching_catalog_filters(shop_product)
if not (matching_context_conditions or matching_catalog_filters):
return []
# Get all possible campaign id's for matching context_conditions
campaigns_based_on_conditions = set(
cls.objects.filter(
active=True,
shop=context.shop,
conditions__id__in=matching_context_conditions
).values_list("pk", flat=True)
)
campaigns_based_on_catalog_filters = set()
if hasattr(cls, "filters"):
# Get all possible campaigns for matching catalog_filters
campaigns_based_on_catalog_filters = set(
cls.objects.filter(
active=True,
shop=context.shop,
filters__id__in=matching_catalog_filters
).values_list("pk", flat=True)
)
all_possible_campaigns_ids = (campaigns_based_on_conditions | campaigns_based_on_catalog_filters)
matching = []
for campaign in cls.objects.filter(id__in=all_possible_campaigns_ids):
if campaign.rules_match(context, shop_product, matching_catalog_filters, matching_context_conditions):
matching.append(campaign)
cache.set(key, matching, timeout=None)
return matching
[docs]class BasketCampaign(Campaign):
admin_url_suffix = "basket_campaign"
basket_line_text = models.CharField(
max_length=120, verbose_name=_("basket line text"), help_text=_("This text will be shown in basket."))
conditions = models.ManyToManyField('BasketCondition', blank=True, related_name='campaign')
coupon = models.OneToOneField('Coupon', null=True, blank=True, related_name='campaign', verbose_name=_("coupon"))
translations = TranslatedFields(
public_name=models.CharField(max_length=120, verbose_name=_("public name"), help_text=_(
"The campaign name to show in the store front."
))
)
def __str__(self):
return force_text(_("Basket Campaign: %(name)s" % dict(name=self.name)))
[docs] def save(self, *args, **kwargs):
if self.coupon:
code_count_for_shop = BasketCampaign.objects.filter(
active=True, shop_id=self.shop.id, coupon__code=self.coupon.code)
if not self.id and code_count_for_shop.exists():
raise ValidationError(_("Can not have multiple active campaigns with same code."))
if self.id and code_count_for_shop.exclude(coupon_id=self.coupon.id).exists():
raise ValidationError(_("Can not have multiple active campaigns with same code."))
super(BasketCampaign, self).save(*args, **kwargs)
self.conditions.update(active=self.active)
@classmethod
[docs] def get_for_product(cls, shop_product):
matching_conditions = get_matching_for_product(
shop_product, provide_category="campaign_basket_condition")
matching_effects = get_matching_for_product(
shop_product, provide_category="campaign_basket_discount_effect_form")
matching_line_effects = get_matching_for_product(
shop_product, provide_category="campaign_basket_line_effect_form")
effects_q = Q(Q(line_effects__id__in=matching_line_effects) | Q(discount_effects__id__in=matching_effects))
matching_q = Q(Q(conditions__in=matching_conditions) | effects_q)
return cls.objects.available(shop=shop_product.shop).filter(matching_q).distinct()
@classmethod
[docs] def get_matching(cls, basket, lines):
matching = []
exclude_condition_ids = set()
queryset = cls.objects.filter(active=True, shop=basket.shop)
if exclude_condition_ids:
queryset = queryset.exclude(conditions__id__in=exclude_condition_ids)
for campaign in queryset.prefetch_related("conditions"):
if campaign.rules_match(basket, lines):
matching.append(campaign)
return matching
[docs] def rules_match(self, basket, lines):
"""
Check if basket rules match.
They will not match if
1) The campaign is not active
2) The campaign has attached coupon
which doesn't match or is not active
3) Any of the attached rules doesn't match
"""
if not self.is_available():
return False
if self.coupon and not (self.coupon.active and self.coupon.code.upper() in [c.upper() for c in basket.codes]):
return False
for rule in self.conditions.all():
if not rule.matches(basket, lines):
return False
return True
[docs]class CouponUsage(models.Model):
coupon = models.ForeignKey('Coupon', related_name='usages')
order = models.ForeignKey(Order, related_name='coupon_usages')
created_by = models.ForeignKey(
settings.AUTH_USER_MODEL, blank=True, null=True,
related_name="+", on_delete=models.SET_NULL,
verbose_name=_("created by"))
modified_by = models.ForeignKey(
settings.AUTH_USER_MODEL, blank=True, null=True,
related_name="+", on_delete=models.SET_NULL,
verbose_name=_("modified by"))
created_on = models.DateTimeField(auto_now_add=True, editable=False, verbose_name=_("created on"))
modified_on = models.DateTimeField(auto_now=True, editable=False, verbose_name=_("modified on"))
@classmethod
[docs] def add_usage(cls, order, coupon):
return cls.objects.create(order=order, coupon=coupon)
@python_2_unicode_compatible
[docs]class Coupon(models.Model):
admin_url_suffix = "coupon"
name_field = "code" # TODO: Document me
search_fields = ["code"] # used by Select2Multiple to know which fields use to search by
code = models.CharField(max_length=12)
usage_limit_customer = models.PositiveIntegerField(
blank=True, null=True,
verbose_name=_("usage limit per customer"), help_text=_("Limit the amount of usages per a single customer."))
usage_limit = models.PositiveIntegerField(
blank=True, null=True,
verbose_name=_("usage limit"),
help_text=_("Set the absolute limit of usages for this coupon. "
"If the limit is zero (0) coupon cannot be used."))
active = models.BooleanField(default=False, verbose_name=_("is active"))
created_by = models.ForeignKey(
settings.AUTH_USER_MODEL, blank=True, null=True,
related_name="+", on_delete=models.SET_NULL,
verbose_name=_("created by"))
modified_by = models.ForeignKey(
settings.AUTH_USER_MODEL, blank=True, null=True,
related_name="+", on_delete=models.SET_NULL,
verbose_name=_("modified by"))
created_on = models.DateTimeField(auto_now_add=True, editable=False, verbose_name=_("created on"))
modified_on = models.DateTimeField(auto_now=True, editable=False, verbose_name=_("modified on"))
[docs] def save(self, **kwargs):
campaign = BasketCampaign.objects.filter(active=True, coupon_id=self.id).first()
if campaign and BasketCampaign.objects.filter(
active=True, shop_id=campaign.shop.id, coupon__code=self.code).exclude(id=campaign.id).exists():
raise ValidationError(_("Can not have multiple active campaigns with same code."))
return super(Coupon, self).save(**kwargs)
@classmethod
[docs] def generate_code(cls, length=6):
if length > 12:
length = 12
return ''.join(random.choice(string.ascii_uppercase + string.digits) for _ in range(length))
@property
def exhausted(self):
val = bool(self.usage_limit and self.usages.count() >= self.usage_limit)
return val
@property
def attached(self):
return BasketCampaign.objects.filter(coupon=self).exists()
[docs] def attach_to_campaign(self, campaign):
if not self.attached:
self.campaign = campaign
@classmethod
[docs] def is_usable(cls, code, customer):
try:
code = cls.objects.get(code__iexact=code, active=True)
return code.can_use_code(customer)
except cls.DoesNotExist:
return False
[docs] def can_use_code(self, customer):
"""
Check if customer can use the code
:param customer:
:type customer: `Contact` or None
:rtype: True|False
"""
if not self.active:
return False
if not self.attached:
return False
if self.usage_limit_customer:
if not customer or customer.is_anonymous:
return False
if (self.usages.filter(order__customer=customer, coupon=self).count() >= self.usage_limit_customer):
return False
return not self.exhausted
[docs] def use(self, order):
return CouponUsage.add_usage(order=order, coupon=self)
[docs] def increase_customer_usage_limit_by(self, amount):
if self.usage_limit_customer:
new_limit = self.usage_limit_customer + amount
else:
new_limit = self.usages.count() + amount
self.usage_limit_customer = new_limit
[docs] def increase_usage_limit_by(self, amount):
self.usage_limit = self.usage_limit + amount if self.usage_limit else (self.usages.count() + amount)
[docs] def has_been_used(self, usage_count=1):
""" See if code is used the times given """
return CouponUsage.objects.filter(coupon=self).count() >= usage_count
def __str__(self):
return self.code
CatalogCampaignLogEntry = define_log_model(CatalogCampaign)
BasketCampaignLogEntry = define_log_model(BasketCampaign)
CouponLogEntry = define_log_model(Coupon)
CouponUsageLogEntry = define_log_model(CouponUsage)