249 lines
11 KiB
Python
249 lines
11 KiB
Python
import decimal
|
|
|
|
from django.contrib.contenttypes.models import ContentType
|
|
from django.core.validators import ValidationError
|
|
from django.db import models
|
|
from django.db.models import Q
|
|
from django.db.models.loading import get_model
|
|
from django.utils.functional import cached_property
|
|
from django.utils.module_loading import autodiscover_modules
|
|
from django.utils.translation import string_concat, ugettext_lazy as _
|
|
|
|
from orchestra.core import caches, validators
|
|
from orchestra.core.translations import ModelTranslation
|
|
from orchestra.core.validators import validate_name
|
|
from orchestra.models import queryset
|
|
from orchestra.utils.python import import_class
|
|
|
|
from . import settings
|
|
from .handlers import ServiceHandler
|
|
|
|
|
|
autodiscover_modules('handlers')
|
|
|
|
rate_class = import_class(settings.SERVICES_RATE_CLASS)
|
|
|
|
|
|
|
|
class Service(models.Model):
|
|
NEVER = ''
|
|
# DAILY = 'DAILY'
|
|
MONTHLY = 'MONTHLY'
|
|
ANUAL = 'ANUAL'
|
|
ONE_DAY = 'ONE_DAY'
|
|
TWO_DAYS = 'TWO_DAYS'
|
|
TEN_DAYS = 'TEN_DAYS'
|
|
ONE_MONTH = 'ONE_MONTH'
|
|
ALWAYS = 'ALWAYS'
|
|
ON_REGISTER = 'ON_REGISTER'
|
|
FIXED_DATE = 'ON_FIXED_DATE'
|
|
BILLING_PERIOD = 'BILLING_PERIOD'
|
|
REGISTER_OR_RENEW = 'REGISTER_OR_RENEW'
|
|
CONCURRENT = 'CONCURRENT'
|
|
NOTHING = 'NOTHING'
|
|
DISCOUNT = 'DISCOUNT'
|
|
COMPENSATE = 'COMPENSATE'
|
|
REFUND = 'REFUND'
|
|
PREPAY = 'PREPAY'
|
|
POSTPAY = 'POSTPAY'
|
|
|
|
_ignore_types = ' and '.join(', '.join(settings.SERVICES_IGNORE_ACCOUNT_TYPE).rsplit(', ', 1)).lower()
|
|
|
|
description = models.CharField(_("description"), max_length=256, unique=True)
|
|
content_type = models.ForeignKey(ContentType, verbose_name=_("content type"),
|
|
help_text=_("Content type of the related service objects."))
|
|
match = models.CharField(_("match"), max_length=256, blank=True,
|
|
help_text=_(
|
|
"Python <a href='https://docs.python.org/2/library/functions.html#eval'>expression</a> "
|
|
"that designates wheter a <tt>content_type</tt> object is related to this service "
|
|
"or not, always evaluates <tt>True</tt> when left blank. "
|
|
"Related instance can be instantiated with <tt>instance</tt> keyword or "
|
|
"<tt>content_type.model_name</tt>.</br>"
|
|
"<tt> databaseuser.type == 'MYSQL'</tt><br>"
|
|
"<tt> miscellaneous.active and str(miscellaneous.identifier).endswith(('.org', '.net', '.com'))</tt><br>"
|
|
"<tt> contractedplan.plan.name == 'association_fee''</tt><br>"
|
|
"<tt> instance.active</tt>"))
|
|
handler_type = models.CharField(_("handler"), max_length=256, blank=True,
|
|
help_text=_("Handler used for processing this Service. A handler "
|
|
"enables customized behaviour far beyond what options "
|
|
"here allow to."),
|
|
choices=ServiceHandler.get_choices())
|
|
is_active = models.BooleanField(_("active"), default=True)
|
|
ignore_superusers = models.BooleanField(_("ignore %s") % _ignore_types, default=True,
|
|
help_text=_("Designates whether %s orders are marked as ignored by default or not.") % _ignore_types)
|
|
# Billing
|
|
billing_period = models.CharField(_("billing period"), max_length=16,
|
|
help_text=_("Renewal period for recurring invoicing."),
|
|
choices=(
|
|
(NEVER, _("One time service")),
|
|
(MONTHLY, _("Monthly billing")),
|
|
(ANUAL, _("Anual billing")),
|
|
),
|
|
default=ANUAL, blank=True)
|
|
billing_point = models.CharField(_("billing point"), max_length=16,
|
|
help_text=_("Reference point for calculating the renewal date "
|
|
"on recurring invoices"),
|
|
choices=(
|
|
(ON_REGISTER, _("Registration date")),
|
|
(FIXED_DATE, _("Fixed billing date")),
|
|
),
|
|
default=FIXED_DATE)
|
|
is_fee = models.BooleanField(_("fee"), default=False,
|
|
help_text=_("Designates whether this service should be billed as "
|
|
" membership fee or not"))
|
|
order_description = models.CharField(_("Order description"), max_length=128, blank=True,
|
|
help_text=_(
|
|
"Python <a href='https://docs.python.org/2/library/functions.html#eval'>expression</a> "
|
|
"used for generating the description for the bill lines of this services.<br>"
|
|
"Defaults to <tt>'%s: %s' % (handler.description, instance)</tt>"
|
|
))
|
|
ignore_period = models.CharField(_("ignore period"), max_length=16, blank=True,
|
|
help_text=_("Period in which orders will be ignored if cancelled. "
|
|
"Useful for designating <i>trial periods</i>"),
|
|
choices=(
|
|
(NEVER, _("Never")),
|
|
(ONE_DAY, _("One day")),
|
|
(TWO_DAYS, _("Two days")),
|
|
(TEN_DAYS, _("Ten days")),
|
|
(ONE_MONTH, _("One month")),
|
|
),
|
|
default=settings.SERVICES_DEFAULT_IGNORE_PERIOD)
|
|
# Pricing
|
|
metric = models.CharField(_("metric"), max_length=256, blank=True,
|
|
help_text=_(
|
|
"Python <a href='https://docs.python.org/2/library/functions.html#eval'>expression</a> "
|
|
"used for obtinging the <i>metric value</i> for the pricing rate computation. "
|
|
"Number of orders is used when left blank. Related instance can be instantiated "
|
|
"with <tt>instance</tt> keyword or <tt>content_type.model_name</tt>.<br>"
|
|
"<tt> max((mailbox.resources.disk.allocated or 0) -1, 0)</tt><br>"
|
|
"<tt> miscellaneous.amount</tt><br>"
|
|
"<tt> max((account.resources.traffic.used or 0) -"
|
|
" getattr(account.miscellaneous.filter(is_active=True,"
|
|
" service__name='traffic-prepay').last(), 'amount', 0), 0)</tt>"))
|
|
nominal_price = models.DecimalField(_("nominal price"), max_digits=12,
|
|
decimal_places=2)
|
|
tax = models.PositiveIntegerField(_("tax"), choices=settings.SERVICES_SERVICE_TAXES,
|
|
default=settings.SERVICES_SERVICE_DEFAULT_TAX)
|
|
pricing_period = models.CharField(_("pricing period"), max_length=16, blank=True,
|
|
help_text=_("Time period that is used for computing the rate metric."),
|
|
choices=(
|
|
(NEVER, _("Current value")),
|
|
(BILLING_PERIOD, _("Same as billing period")),
|
|
(MONTHLY, _("Monthly data")),
|
|
(ANUAL, _("Anual data")),
|
|
),
|
|
default=BILLING_PERIOD)
|
|
rate_algorithm = models.CharField(_("rate algorithm"), max_length=16,
|
|
help_text=string_concat(_("Algorithm used to interprete the rating table."), *[
|
|
string_concat('<br> ', method.verbose_name, ': ', method.help_text)
|
|
for name, method in rate_class.get_methods().items()
|
|
]), choices=rate_class.get_choices(), default=rate_class.get_choices()[0][0])
|
|
on_cancel = models.CharField(_("on cancel"), max_length=16,
|
|
help_text=_("Defines the cancellation behaviour of this service."),
|
|
choices=(
|
|
(NOTHING, _("Nothing")),
|
|
(DISCOUNT, _("Discount")),
|
|
(COMPENSATE, _("Compensat")),
|
|
(REFUND, _("Refund")),
|
|
),
|
|
default=DISCOUNT)
|
|
payment_style = models.CharField(_("payment style"), max_length=16,
|
|
help_text=_("Designates whether this service should be paid after "
|
|
"consumtion (postpay/on demand) or prepaid."),
|
|
choices=(
|
|
(PREPAY, _("Prepay")),
|
|
(POSTPAY, _("Postpay (on demand)")),
|
|
),
|
|
default=PREPAY)
|
|
|
|
def __str__(self):
|
|
return self.description
|
|
|
|
@classmethod
|
|
def get_services(cls, instance):
|
|
cache = caches.get_request_cache()
|
|
ct = ContentType.objects.get_for_model(instance)
|
|
key = 'services.Service-%i' % ct.pk
|
|
services = cache.get(key)
|
|
if services is None:
|
|
services = cls.objects.filter(content_type=ct, is_active=True)
|
|
cache.set(key, services)
|
|
return services
|
|
|
|
@cached_property
|
|
def handler(self):
|
|
""" Accessor of this service handler instance """
|
|
if self.handler_type:
|
|
return ServiceHandler.get(self.handler_type)(self)
|
|
return ServiceHandler(self)
|
|
|
|
def clean(self):
|
|
self.description = self.description.strip()
|
|
if hasattr(self, 'content_type'):
|
|
validators.all_valid({
|
|
'content_type': (self.handler.validate_content_type, self),
|
|
'match': (self.handler.validate_match, self),
|
|
'metric': (self.handler.validate_metric, self),
|
|
})
|
|
|
|
def get_pricing_period(self):
|
|
if self.pricing_period == self.BILLING_PERIOD:
|
|
return self.billing_period
|
|
return self.pricing_period
|
|
|
|
def get_price(self, account, metric, rates=None, position=None):
|
|
"""
|
|
if position is provided an specific price for that position is returned,
|
|
accumulated price is returned otherwise
|
|
"""
|
|
if rates is None:
|
|
rates = self.get_rates(account)
|
|
if rates:
|
|
rates = self.rate_method(rates, metric)
|
|
if not rates:
|
|
rates = [{
|
|
'quantity': metric,
|
|
'price': self.nominal_price,
|
|
}]
|
|
counter = 0
|
|
if position is None:
|
|
ant_counter = 0
|
|
accumulated = 0
|
|
for rate in rates:
|
|
counter += rate['quantity']
|
|
if counter >= metric:
|
|
counter = metric
|
|
accumulated += (counter - ant_counter) * rate['price']
|
|
return decimal.Decimal(str(accumulated))
|
|
ant_counter = counter
|
|
accumulated += rate['price'] * rate['quantity']
|
|
else:
|
|
for rate in rates:
|
|
counter += rate['quantity']
|
|
if counter >= position:
|
|
return decimal.Decimal(str(rate['price']))
|
|
|
|
def get_rates(self, account, cache=True):
|
|
# rates are cached per account
|
|
if not cache:
|
|
return self.rates.by_account(account)
|
|
if not hasattr(self, '__cached_rates'):
|
|
self.__cached_rates = {}
|
|
rates = self.__cached_rates.get(account.id, self.rates.by_account(account))
|
|
return rates
|
|
|
|
@property
|
|
def rate_method(self):
|
|
return rate_class.get_methods()[self.rate_algorithm]
|
|
|
|
def update_orders(self, commit=True):
|
|
order_model = get_model(settings.SERVICES_ORDER_MODEL)
|
|
related_model = self.content_type.model_class()
|
|
updates = []
|
|
for instance in related_model.objects.all().select_related('account'):
|
|
updates += order_model.update_orders(instance, service=self, commit=commit)
|
|
return updates
|
|
|
|
|
|
ModelTranslation.register(Service, ('description',))
|