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82 lines
2.6 KiB
82 lines
2.6 KiB
from datetime import datetime
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from django.db import models
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from store.models import ProductVariation
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def get_change(current, previous):
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if current == previous:
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return 100.0
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try:
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return (abs(current - previous) / previous) * 100.0
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except ZeroDivisionError:
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return 0
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class DTYSModel(models.Model):
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"""Drop `Til You Shop Model"""
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product = models.ForeignKey(ProductVariation)
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price_start = models.IntegerField(verbose_name="Начальная цена")
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price_end = models.IntegerField(verbose_name="Конечная цена (минимальная)")
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price_stopped = models.IntegerField(verbose_name="Прайс заказа", default=0)
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start_date = models.DateField(verbose_name='Дата начала')
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start_time = models.TimeField(verbose_name='Время начала')
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end_date = models.DateField(verbose_name='Дата окончания')
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end_time = models.TimeField(verbose_name='Время окончания')
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is_stopped = models.BooleanField(verbose_name="Остановлен", default=False)
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is_public = models.BooleanField(verbose_name="Опубликован", default=False)
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is_ordered = models.BooleanField(verbose_name="Заказан", default=False)
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@property
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def end_datetime(self):
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return datetime.combine(self.end_date, self.end_time)
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@property
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def start_datetime(self):
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return datetime.combine(self.start_date, self.start_time)
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def get_dec_by_sec(self):
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return "%.1f" % (self.get_price_diff() / self.get_date_delta())
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def get_price_diff(self):
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return self.price_start - self.price_end
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def _time_percent(self):
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time_percent = get_change(
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self.get_delta_now(),
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self.get_date_delta()
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)
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return time_percent
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def get_delta_now(self):
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"""in seconds"""
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from django.utils import timezone as tz
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_now = tz.now()
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return (self.end_datetime - _now).total_seconds()
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def get_date_delta(self):
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""" in seconds """
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return (self.end_datetime - self.start_datetime).total_seconds()
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def get_current_price(self):
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dec_from_price = (self.get_price_diff() * (self._time_percent() / 100))
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price_current = self.price_start - dec_from_price
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return price_current
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def current_price_format(self):
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return "%.1f" % self.get_current_price()
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def stop(self):
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"""Stop this DTYS"""
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self.is_stopped = True
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if self.price_stopped == 0:
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self.price_stopped = max(self.price_end, self.get_current_price())
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self.save()
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