# Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
#
from django.db import models
+from django.db.models import F
from jsonfield import JSONField
class ISBNPool(models.Model):
+ PURPOSE_WL = 'WL'
+ PURPOSE_FNP = 'FNP'
+ PURPOSE_CHOICES = (
+ (PURPOSE_WL, 'Wolne Lektury'),
+ (PURPOSE_FNP, 'Fundacja Nowoczesna Polska'),
+ )
+
prefix = models.CharField(max_length=10)
suffix_from = models.IntegerField()
suffix_to = models.IntegerField()
ref_from = models.IntegerField()
next_suffix = models.IntegerField()
+ purpose = models.CharField(max_length=4, choices=PURPOSE_CHOICES)
+
+ def __unicode__(self):
+ return self.prefix
+
+ @classmethod
+ def active_pool(cls, purpose):
+ pools = cls.objects.filter(purpose=purpose)
+ pools = pools.exclude(next_suffix__gt=F('suffix_to'))
+ if len(pools) == 1:
+ return pools.get()
+ else:
+ pools.exclude(next_suffix=F('suffix_from'))
+ return pools.get()
@staticmethod
def check_digit(prefix12):
digits = [int(d) for d in prefix12]
return str((-sum(digits[0::2]) + 7 * sum(digits[1::2])) % 10)
- def isbn(self, suffix):
+ def isbn(self, suffix, dashes=False):
prefix_length = len(self.prefix)
suffix_length = 12 - prefix_length
suffix_str = ('%%0%dd' % suffix_length) % suffix
prefix12 = self.prefix + suffix_str
- return prefix12 + self.check_digit(prefix12)
+ if dashes:
+ prefix12_final = '%s-%s-%s-%s-' % (self.prefix[:3], self.prefix[3:5], self.prefix[5:], suffix_str)
+ else:
+ prefix12_final = prefix12
+ return prefix12_final + self.check_digit(prefix12)
class ONIXRecord(models.Model):
language = models.CharField(max_length=4)
imprint = models.CharField(max_length=256)
publishing_date = models.DateField()
+ dc_slug = models.CharField(max_length=256, default='', db_index=True)
class Meta:
ordering = ['isbn_pool__id', 'suffix']
+ unique_together = ['isbn_pool', 'suffix']
+
+ @classmethod
+ def new_record(cls, purpose, data):
+ pool = ISBNPool.active_pool(purpose)
+ fields = {
+ 'isbn_pool': pool,
+ 'suffix': pool.next_suffix,
+ }
+ fields_to_copy = [
+ 'product_form',
+ 'product_form_detail',
+ 'title',
+ 'part_number',
+ 'contributors', # ???
+ 'edition_type',
+ 'edition_number',
+ 'language',
+ 'imprint',
+ 'publishing_date',
+ 'dc_slug',
+ ]
+ for field in fields_to_copy:
+ if field in data:
+ fields[field] = data[field]
+ cls.objects.create(**fields)
+ pool.next_suffix += 1
+ pool.save()
- def isbn(self):
- return self.isbn_pool.isbn(self.suffix)
+ def isbn(self, dashes=False):
+ return self.isbn_pool.isbn(self.suffix, dashes=dashes)
def reference(self):
return 'pl-eisbn-%s' % (self.isbn_pool.ref_from + self.suffix)