X-Git-Url: https://git.mdrn.pl/redakcja.git/blobdiff_plain/0c5403e0b84d85ce6f515e2b8e5bc6190647645f..309ec8b919d57858254b78cd7ba3b4d84d90da9a:/src/catalogue/models.py?ds=inline

diff --git a/src/catalogue/models.py b/src/catalogue/models.py
index 530483c8..be7c37f7 100644
--- a/src/catalogue/models.py
+++ b/src/catalogue/models.py
@@ -1,15 +1,64 @@
+from collections import Counter
+from datetime import date, timedelta
+import decimal
+import re
+from urllib.request import urlopen
+from django.apps import apps
+from django.conf import settings
 from django.db import models
+from django.template.loader import render_to_string
+from django.urls import reverse
 from django.utils.translation import gettext_lazy as _
+from admin_ordering.models import OrderableModel
+from wikidata.client import Client
 from .constants import WIKIDATA
-from .wikidata import WikidataMixin
+from .wikidata import WikidataModel
+from .wikimedia import WikiMedia
 
 
-class Author(WikidataMixin, models.Model):
-    slug = models.SlugField(null=True, blank=True, unique=True)
-    first_name = models.CharField(max_length=255, blank=True)
-    last_name = models.CharField(max_length=255, blank=True)
-    year_of_death = models.SmallIntegerField(null=True, blank=True)
+class Author(WikidataModel):
+    slug = models.SlugField(max_length=255, null=True, blank=True, unique=True)
+    first_name = models.CharField(_("first name"), max_length=255, blank=True)
+    last_name = models.CharField(_("last name"), max_length=255, blank=True)
+    genitive = models.CharField(
+        'dopełniacz', max_length=255, blank=True,
+        help_text='utwory … (czyje?)'
+    )
+
+    name_de = models.CharField(_("name (de)"), max_length=255, blank=True)
+    name_lt = models.CharField(_("name (lt)"), max_length=255, blank=True)
+
+    gender = models.CharField(_("gender"), max_length=255, blank=True)
+    nationality = models.CharField(_("nationality"), max_length=255, blank=True)
+
+    year_of_birth = models.SmallIntegerField(_("year of birth"), null=True, blank=True)
+    year_of_birth_inexact = models.BooleanField(_("inexact"), default=False)
+    year_of_birth_range = models.SmallIntegerField(_("year of birth, range end"), null=True, blank=True)
+    date_of_birth = models.DateField(_("date_of_birth"), null=True, blank=True)
+    century_of_birth = models.SmallIntegerField(
+        _("century of birth"), null=True, blank=True,
+        help_text=_('Set if year unknown. Negative for BC.')
+    )
+    place_of_birth = models.ForeignKey(
+        'Place', models.PROTECT, null=True, blank=True,
+        verbose_name=_('place of birth'),
+        related_name='authors_born'
+    )
+    year_of_death = models.SmallIntegerField(_("year of death"), null=True, blank=True)
+    year_of_death_inexact = models.BooleanField(_("inexact"), default=False)
+    year_of_death_range = models.SmallIntegerField(_("year of death, range end"), null=True, blank=True)
+    date_of_death = models.DateField(_("date_of_death"), null=True, blank=True)
+    century_of_death = models.SmallIntegerField(
+        _("century of death"), null=True, blank=True,
+        help_text=_('Set if year unknown. Negative for BC.')
+    )
+    place_of_death = models.ForeignKey(
+        'Place', models.PROTECT, null=True, blank=True,
+        verbose_name=_('place of death'),
+        related_name='authors_died'
+    )
     status = models.PositiveSmallIntegerField(
+        _("status"), 
         null=True,
         blank=True,
         choices=[
@@ -19,53 +68,586 @@ class Author(WikidataMixin, models.Model):
             (4, _("Unknown")),
         ],
     )
-    notes = models.TextField(blank=True)
-    gazeta_link = models.CharField(max_length=255, blank=True)
-    culturepl_link = models.CharField(max_length=255, blank=True)
-    description = models.TextField(blank=True)
+    notes = models.TextField(_("notes"), blank=True, help_text=_('private'))
+
+    gazeta_link = models.CharField(_("gazeta link"), max_length=255, blank=True)
+    culturepl_link = models.CharField(_("culture.pl link"), max_length=255, blank=True)
+    plwiki = models.CharField(blank=True, max_length=255)
+    photo = models.ImageField(blank=True, null=True, upload_to='catalogue/author/')
+    photo_source = models.CharField(blank=True, max_length=255)
+    photo_attribution = models.CharField(max_length=255, blank=True)
+
+    description = models.TextField(_("description"), blank=True, help_text=_('for publication'))
+
     priority = models.PositiveSmallIntegerField(
+        _("priority"), 
         default=0, choices=[(0, _("Low")), (1, _("Medium")), (2, _("High"))]
     )
+    collections = models.ManyToManyField("Collection", blank=True, verbose_name=_("collections"))
+
+    woblink = models.IntegerField(null=True, blank=True)
+    
+    class Meta:
+        verbose_name = _('author')
+        verbose_name_plural = _('authors')
+        ordering = ("last_name", "first_name", "year_of_death")
 
     class Wikidata:
         first_name = WIKIDATA.GIVEN_NAME
         last_name = WIKIDATA.LAST_NAME
+        date_of_birth = WIKIDATA.DATE_OF_BIRTH
+        year_of_birth = WIKIDATA.DATE_OF_BIRTH
+        place_of_birth = WIKIDATA.PLACE_OF_BIRTH
+        date_of_death = WIKIDATA.DATE_OF_DEATH
         year_of_death = WIKIDATA.DATE_OF_DEATH
-        notes = "description"
+        place_of_death = WIKIDATA.PLACE_OF_DEATH
+        gender = WIKIDATA.GENDER
+        notes = WikiMedia.append("description")
+        plwiki = "plwiki"
+        photo = WikiMedia.download(WIKIDATA.IMAGE)
+        photo_source = WikiMedia.descriptionurl(WIKIDATA.IMAGE)
+        photo_attribution = WikiMedia.attribution(WIKIDATA.IMAGE)
+
+        def _supplement(obj):
+            if not obj.first_name and not obj.last_name:
+                yield 'first_name', 'label'
 
     def __str__(self):
-        return f"{self.first_name} {self.last_name}"
+        name = f"{self.first_name} {self.last_name}"
+        if self.year_of_death is not None:
+            name += f' (zm. {self.year_of_death})'
+        return name
+
+    def get_absolute_url(self):
+        return reverse("catalogue_author", args=[self.slug])
+
+    @classmethod
+    def get_by_literal(cls, literal):
+        names = literal.split(',', 1)
+        names = [n.strip() for n in names]
+        if len(names) == 2:
+            return cls.objects.filter(last_name=names[0], first_name=names[1]).first()
+        else:
+            return cls.objects.filter(last_name_pl=names[0], first_name_pl='').first() or \
+                cls.objects.filter(first_name_pl=names[0], last_name_pl='').first() or \
+                cls.objects.filter(first_name_pl=literal, last_name_pl='').first() or \
+                cls.objects.filter(first_name_pl=literal, last_name_pl=None).first()
+
+    @property
+    def name(self):
+        return f"{self.last_name}, {self.first_name}"
+    
+    @property
+    def pd_year(self):
+        if self.year_of_death:
+            return self.year_of_death + 71
+        elif self.year_of_death == 0:
+            return 0
+        else:
+            return None
+
+    def generate_description(self):
+        t = render_to_string(
+            'catalogue/author_description.html',
+            {'obj': self}
+        )
+        return t
+
+    def century_description(self, number):
+        n = abs(number)
+        letters = ''
+        while n > 10:
+            letters += 'X'
+            n -= 10
+        if n == 9:
+            letters += 'IX'
+            n = 0
+        elif n >= 5:
+            letters += 'V'
+            n -= 5
+        if n == 4:
+            letters += 'IV'
+            n = 0
+        letters += 'I' * n
+        letters += ' w.'
+        if number < 0:
+            letters += ' p.n.e.'
+        return letters
+
+    def birth_century_description(self):
+        return self.century_description(self.century_of_birth)
+
+    def death_century_description(self):
+        return self.century_description(self.century_of_death)
+
+    def year_description(self, number):
+        n = abs(number)
+        letters = str(n)
+        letters += ' r.'
+        if number < 0:
+            letters += ' p.n.e.'
+        return letters
+
+    def year_of_birth_description(self):
+        return self.year_description(self.year_of_birth)
+    def year_of_death_description(self):
+        return self.year_description(self.year_of_death)
+
+
+class NotableBook(OrderableModel):
+    author = models.ForeignKey(Author, models.CASCADE)
+    book = models.ForeignKey('Book', models.CASCADE)
+
+    def __str__(self):
+        return self.book.title
+
+
+class Category(WikidataModel):
+    name = models.CharField(_("name"), max_length=255)
+    slug = models.SlugField(max_length=255, unique=True)
+    description = models.TextField(_("description"), blank=True, help_text=_('for publication'))
 
+    class Meta:
+        abstract = True
 
-class Book(WikidataMixin, models.Model):
+    def __str__(self):
+        return self.name
+
+
+class Epoch(Category):
+    adjective_feminine_singular = models.CharField(
+        'przymiotnik pojedynczy żeński', max_length=255, blank=True,
+        help_text='twórczość … Adama Mickiewicza'
+    )
+    adjective_nonmasculine_plural = models.CharField(
+        'przymiotnik mnogi niemęskoosobowy', max_length=255, blank=True,
+        help_text='utwory … Adama Mickiewicza'
+    )
+
+    class Meta:
+        verbose_name = _('epoch')
+        verbose_name_plural = _('epochs')
+
+
+class Genre(Category):
+    thema = models.CharField(
+        max_length=32, blank=True,
+        help_text='Odpowiadający kwalifikator Thema.'
+    )
+    plural = models.CharField(
+        'liczba mnoga', max_length=255, blank=True,
+    )
+    is_epoch_specific = models.BooleanField(
+        default=False,
+        help_text='Po wskazaniu tego gatunku, dodanie epoki byłoby nadmiarowe, np. „dramat romantyczny”'
+    )
+
+    class Meta:
+        verbose_name = _('genre')
+        verbose_name_plural = _('genres')
+
+
+class Kind(Category):
+    collective_noun = models.CharField(
+        'określenie zbiorowe', max_length=255, blank=True,
+        help_text='np. „Liryka” albo „Twórczość dramatyczna”'
+    )
+
+    class Meta:
+        verbose_name = _('kind')
+        verbose_name_plural = _('kinds')
+
+
+class Book(WikidataModel):
     slug = models.SlugField(max_length=255, blank=True, null=True, unique=True)
-    authors = models.ManyToManyField(Author, blank=True)
+    authors = models.ManyToManyField(Author, blank=True, verbose_name=_("authors"))
     translators = models.ManyToManyField(
         Author,
         related_name="translated_book_set",
         related_query_name="translated_book",
         blank=True,
+        verbose_name=_("translators")
     )
-    title = models.CharField(max_length=255, blank=True)
-    language = models.CharField(max_length=3, blank=True)
+    epochs = models.ManyToManyField(Epoch, blank=True, verbose_name=_("epochs"))
+    kinds = models.ManyToManyField(Kind, blank=True, verbose_name=_("kinds"))
+    genres = models.ManyToManyField(Genre, blank=True, verbose_name=_("genres"))
+    title = models.CharField(_("title"), max_length=255, blank=True)
+    language = models.CharField(_("language"), max_length=255, blank=True)
     based_on = models.ForeignKey(
-        "self", models.PROTECT, related_name="translation", null=True, blank=True
+        "self", models.PROTECT, related_name="translation", null=True, blank=True,
+        verbose_name=_("based on")
     )
-    scans_source = models.CharField(max_length=255, blank=True)
-    text_source = models.CharField(max_length=255, blank=True)
-    notes = models.TextField(blank=True)
+    scans_source = models.CharField(_("scans source"), max_length=255, blank=True)
+    text_source = models.CharField(_("text source"), max_length=255, blank=True)
+    notes = models.TextField(_("notes"), blank=True, help_text=_('private'))
     priority = models.PositiveSmallIntegerField(
+        _("priority"),
         default=0, choices=[(0, _("Low")), (1, _("Medium")), (2, _("High"))]
     )
-    pd_year = models.IntegerField(null=True, blank=True)
+    original_year = models.IntegerField(_('original publication year'), null=True, blank=True)
+    pd_year = models.IntegerField(_('year of entry into PD'), null=True, blank=True)
+    plwiki = models.CharField(blank=True, max_length=255)
+    gazeta_link = models.CharField(_("gazeta link"), max_length=255, blank=True)
+    collections = models.ManyToManyField("Collection", blank=True, verbose_name=_("collections"))
+
+    estimated_chars = models.IntegerField(_("estimated number of characters"), null=True, blank=True)
+    estimated_verses = models.IntegerField(_("estimated number of verses"), null=True, blank=True)
+    estimate_source = models.CharField(_("source of estimates"), max_length=2048, blank=True)
+
+    free_license = models.BooleanField(_('free license'), default=False)
+    polona_missing = models.BooleanField(_('missing on Polona'), default=False)
+
+    monthly_views_reader = models.IntegerField(default=0)
+    monthly_views_page = models.IntegerField(default=0)
+    
+    class Meta:
+        ordering = ("title",)
+        verbose_name = _('book')
+        verbose_name_plural = _('books')
 
     class Wikidata:
+        plwiki = "plwiki"
         authors = WIKIDATA.AUTHOR
         translators = WIKIDATA.TRANSLATOR
         title = WIKIDATA.TITLE
         language = WIKIDATA.LANGUAGE
         based_on = WIKIDATA.BASED_ON
-        notes = "description"
+        original_year = WIKIDATA.PUBLICATION_DATE
+        notes = WikiMedia.append("description")
+
+    def __str__(self):
+        txt = self.title
+        if self.original_year:
+            txt = f"{txt} ({self.original_year})"
+        astr = self.authors_str()
+        if astr:
+            txt = f"{txt}, {astr}"
+        tstr = self.translators_str()
+        if tstr:
+            txt = f"{txt}, tłum. {tstr}"
+        return txt
+
+    def get_absolute_url(self):
+        return reverse("catalogue_book", args=[self.slug])
+
+    def is_text_public(self):
+        return self.free_license or (self.pd_year is not None and self.pd_year <= date.today().year)
+
+    def audio_status(self):
+        return {}
+    
+    @property
+    def wluri(self):
+        return f'https://wolnelektury.pl/katalog/lektura/{self.slug}/'
+    
+    def authors_str(self):
+        if not self.pk:
+            return ''
+        return ", ".join(str(author) for author in self.authors.all())
+    authors_str.admin_order_field = 'authors__last_name'
+    authors_str.short_description = _('Author')
+
+    def translators_str(self):
+        if not self.pk:
+            return ''
+        return ", ".join(str(author) for author in self.translators.all())
+    translators_str.admin_order_field = 'translators__last_name'
+    translators_str.short_description = _('Translator')
+
+    def authors_first_names(self):
+        return ', '.join(a.first_name for a in self.authors.all())
+
+    def authors_last_names(self):
+        return ', '.join(a.last_name for a in self.authors.all())
+
+    def translators_first_names(self):
+        return ', '.join(a.first_name for a in self.translators.all())
+
+    def translators_last_names(self):
+        return ', '.join(a.last_name for a in self.translators.all())
+
+    def document_book__project(self):
+        b = self.document_books.first()
+        if b is None: return ''
+        if b.project is None: return ''
+        return b.project.name
+
+    def audience(self):
+        try:
+            return self.document_books.first().wldocument().book_info.audience or ''
+        except:
+            return ''
+
+    def get_estimated_costs(self):
+        return {
+            work_type: work_type.calculate(self)
+            for work_type in WorkType.objects.all()
+        }
+
+    def scans_galleries(self):
+        return [bs.pk for bs in self.booksource_set.all()]
+
+    def is_published(self):
+        return any(b.is_published() for b in self.document_books.all())
+    
+    def update_monthly_stats(self):
+        # Find publication date.
+        # By default, get previous 12 months.
+        this_month = date.today().replace(day=1)
+        cutoff = this_month.replace(year=this_month.year - 1)
+        months = 12
+
+        # If the book was published later,
+        # find out the denominator.
+        pbr = apps.get_model('documents', 'BookPublishRecord').objects.filter(
+            book__catalogue_book=self).order_by('timestamp').first()
+        if pbr is not None and pbr.timestamp.date() > cutoff:
+            months = (this_month - pbr.timestamp.date()).days / 365 * 12
+
+        if not months:
+            return
+
+        stats = self.bookmonthlystats_set.filter(date__gte=cutoff).aggregate(
+            views_page=models.Sum('views_page'),
+            views_reader=models.Sum('views_reader')
+        )
+        self.monthly_views_page = stats['views_page'] / months
+        self.monthly_views_reader = stats['views_reader'] / months
+        self.save(update_fields=['monthly_views_page', 'monthly_views_reader'])
+
+    @property
+    def content_stats(self):
+        if hasattr(self, '_content_stats'):
+            return self._content_stats
+        try:
+            stats = self.document_books.first().wldocument(librarian2=True).get_statistics()['total']
+        except Exception as e:
+            stats = {}
+        self._content_stats = stats
+        return stats
+
+    @property
+    def are_sources_ready(self):
+        if not self.booksource_set.exists():
+            return False
+        for bs in self.booksource_set.all():
+            if not bs.source.has_view_files() or not bs.source.has_ocr_files() or bs.source.modified_at > bs.source.processed_at:
+                return False
+        return True
+
+    chars = lambda self: self.content_stats.get('chars', '')
+    chars_with_fn = lambda self: self.content_stats.get('chars_with_fn', '')
+    words = lambda self: self.content_stats.get('words', '')
+    words_with_fn = lambda self: self.content_stats.get('words_with_fn', '')
+    verses = lambda self: self.content_stats.get('verses', '')
+    verses_with_fn = lambda self: self.content_stats.get('verses_with_fn', '')
+    chars_out_verse = lambda self: self.content_stats.get('chars_out_verse', '')
+    chars_out_verse_with_fn = lambda self: self.content_stats.get('chars_out_verse_with_fn', '')
+
+class CollectionCategory(models.Model):
+    name = models.CharField(_("name"), max_length=255)
+    parent = models.ForeignKey('self', models.SET_NULL, related_name='children', null=True, blank=True, verbose_name=_("parent"))
+    notes = models.TextField(_("notes"), blank=True, help_text=_('private'))
+
+    class Meta:
+        ordering = ('parent__name', 'name')
+        verbose_name = _('collection category')
+        verbose_name_plural = _('collection categories')
 
     def __str__(self):
-        return self.title
+        if self.parent:
+            return f"{self.parent} / {self.name}"
+        else:
+            return self.name
+
+
+class Collection(models.Model):
+    name = models.CharField(_("name"), max_length=255)
+    slug = models.SlugField(max_length=255, unique=True)
+    category = models.ForeignKey(CollectionCategory, models.SET_NULL, null=True, blank=True, verbose_name=_("category"))
+    notes = models.TextField(_("notes"), blank=True, help_text=_('private'))
+    description = models.TextField(_("description"), blank=True)
+
+    class Meta:
+        ordering = ('category', 'name')
+        verbose_name = _('collection')
+        verbose_name_plural = _('collections')
+
+    def __str__(self):
+        if self.category:
+            return f"{self.category} / {self.name}"
+        else:
+            return self.name
+
+    def get_estimated_costs(self):
+        costs = Counter()
+        for book in self.book_set.all():
+            for k, v in book.get_estimated_costs().items():
+                costs[k] += v or 0
+
+        for author in self.author_set.all():
+            for book in author.book_set.all():
+                for k, v in book.get_estimated_costs().items():
+                    costs[k] += v or 0
+            for book in author.translated_book_set.all():
+                for k, v in book.get_estimated_costs().items():
+                    costs[k] += v or 0
+        return costs
+
+
+class WorkType(models.Model):
+    name = models.CharField(_("name"), max_length=255)
+
+    class Meta:
+        ordering = ('name',)
+        verbose_name = _('work type')
+        verbose_name_plural = _('work types')
+    
+    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(_("priority"), default=1)
+    per_normpage = models.DecimalField(_("per normalized page"), decimal_places=2, max_digits=6, null=True, blank=True)
+    per_verse = models.DecimalField(_("per verse"), decimal_places=2, max_digits=6, null=True, blank=True)
+    work_type = models.ForeignKey(WorkType, models.CASCADE, verbose_name=_("work type"))
+    epochs = models.ManyToManyField(Epoch, blank=True, verbose_name=_("epochs"))
+    kinds = models.ManyToManyField(Kind, blank=True, verbose_name=_("kinds"))
+    genres = models.ManyToManyField(Genre, blank=True, verbose_name=_("genres"))
+    collections = models.ManyToManyField(Collection, blank=True, verbose_name=_("collections"))
+
+    class Meta:
+        ordering = ('priority',)
+        verbose_name = _('work rate')
+        verbose_name_plural = _('work rates')
+
+    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)
+
+
+class Place(WikidataModel):
+    name = models.CharField(_('name'), max_length=255, blank=True)
+    locative = models.CharField(_('locative'), max_length=255, blank=True, help_text=_('in…'))
+
+    class Meta:
+        verbose_name = _('place')
+        verbose_name_plural = _('places')
+    
+    class Wikidata:
+        name = 'label'
+
+    def __str__(self):
+        return self.name
+
+
+class BookMonthlyStats(models.Model):
+    book = models.ForeignKey('catalogue.Book', models.CASCADE)
+    date = models.DateField()
+    views_reader = models.IntegerField(default=0)
+    views_page = models.IntegerField(default=0)
+
+    @classmethod
+    def build_for_month(cls, date):
+        date = date.replace(day=1)
+        period = 'month'
+
+        date = date.isoformat()
+        url = f'{settings.PIWIK_URL}?date={date}&filter_limit=-1&format=CSV&idSite={settings.PIWIK_WL_SITE_ID}&language=pl&method=Actions.getPageUrls&module=API&period={period}&segment=&token_auth={settings.PIWIK_TOKEN}&flat=1'
+        data = urlopen(url).read().decode('utf-16')
+        lines = data.split('\n')[1:]
+        for line in lines:
+            m = re.match('^/katalog/lektura/([^,./]+)\.html,', line)
+            if m is not None:
+                which = 'views_reader'
+            else:
+                m = re.match('^/katalog/lektura/([^,./]+)/,', line)
+                if m is not None:
+                    which = 'views_page'
+            if m is not None:
+                slug = m.group(1)
+                _url, _uviews, views, _rest = line.split(',', 3)
+                views = int(views)
+                try:
+                    book = Book.objects.get(slug=slug)
+                except Book.DoesNotExist:
+                    continue
+                else:
+                    cls.objects.update_or_create(
+                        book=book, date=date,
+                        defaults={which: views}
+                    )
+                    book.update_monthly_stats()
+
+
+class Thema(models.Model):
+    code = models.CharField(
+        max_length=128, unique=True,
+        help_text='Używamy rozszerzenia <code>.WL-</code> do oznaczania własnych kodów.<br> '
+        'Przykładowo, w przypadku potrzeby stworzenia nowej kategorii „insurekcja kościuszkowska”, '
+        'można by ją utworzyć jako 3MLQ‑PL‑A.WL-A, czyli w ramach już istniejącej wyższej kategorii 3MLQ‑PL‑A „rozbiory Polski”.',
+    )
+    name = models.CharField(max_length=1024)
+    slug = models.SlugField(
+        max_length=255, null=True, blank=True, unique=True,
+        help_text='Element adresu na WL, w postaci: /tag/slug/. Można zmieniać.'
+    )
+    plural = models.CharField(
+        'liczba mnoga', max_length=255, blank=True,
+    )
+    description = models.TextField(blank=True)
+    public_description = models.TextField(blank=True)
+    usable = models.BooleanField()
+    usable_as_main = models.BooleanField(default=False)
+    hidden = models.BooleanField(default=False)
+    woblink_category = models.IntegerField(null=True, blank=True)
+
+    class Meta:
+        ordering = ('code',)
+        verbose_name_plural = 'Thema'
+
+
+class Audience(models.Model):
+    code = models.CharField(
+        max_length=128, unique=True,
+        help_text='Techniczny identifyikator. W miarę możliwości nie należy zmieniać.'
+    )
+    name = models.CharField(
+        max_length=1024,
+        help_text='W formie: „dla … (kogo?)”'
+    )
+    slug = models.SlugField(
+        max_length=255, null=True, blank=True, unique=True,
+        help_text='Element adresu na WL, w postaci: /dla/slug/. Można zmieniać.'
+    )
+    description = models.TextField(blank=True)
+    thema = models.CharField(
+        max_length=32, blank=True,
+        help_text='Odpowiadający kwalifikator Thema.'
+    )
+    woblink = models.IntegerField(null=True, blank=True)
+
+    class Meta:
+        ordering = ('code',)