+
+class WorkType(models.Model):
+ name = models.CharField(max_length=255)
+
+ def get_rate_for(self, book):
+ for workrate in self.workrate_set.all():
+ if workrate.matches(book):
+ return workrate
+
+ def calculate(self, book):
+ workrate = self.get_rate_for(book)
+ if workrate is not None:
+ return workrate.calculate(book)
+
+
+
+class WorkRate(models.Model):
+ priority = models.IntegerField(default=1)
+ per_normpage = models.DecimalField(decimal_places=2, max_digits=6, null=True, blank=True)
+ per_verse = models.DecimalField(decimal_places=2, max_digits=6, null=True, blank=True)
+ work_type = models.ForeignKey(WorkType, models.CASCADE)
+ epochs = models.ManyToManyField(Epoch, blank=True)
+ kinds = models.ManyToManyField(Kind, blank=True)
+ genres = models.ManyToManyField(Genre, blank=True)
+ collections = models.ManyToManyField(Collection, blank=True)
+
+ class Meta:
+ ordering = ('priority',)
+
+ def matches(self, book):
+ for category in 'epochs', 'kinds', 'genres', 'collections':
+ oneof = getattr(self, category).all()
+ if oneof:
+ if not set(oneof).intersection(
+ getattr(book, category).all()):
+ return False
+ return True
+
+ def calculate(self, book):
+ if self.per_verse:
+ if book.estimated_verses:
+ return book.estimated_verses * self.per_verse
+ elif self.per_normpage:
+ if book.estimated_chars:
+ return (decimal.Decimal(book.estimated_chars) / 1800 * self.per_normpage).quantize(decimal.Decimal('1.00'), rounding=decimal.ROUND_HALF_UP)
+