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[wolnelektury.git] / apps / catalogue / models.py

diff --git a/apps/catalogue/models.py b/apps/catalogue/models.py
index 90ecb1a..dd251c1 100644 (file)
--- a/apps/catalogue/models.py
+++ b/apps/catalogue/models.py
@@ -13,11 +13,11 @@ from django.utils.translation import get_language
 from django.core.urlresolvers import reverse
 from datetime import datetime
 
 from django.core.urlresolvers import reverse
 from datetime import datetime
 

-from newtagging.models import TagBase
+from newtagging.models import TagBase, tags_updated

 from newtagging import managers
 from catalogue.fields import JSONField
 
 from newtagging import managers
 from catalogue.fields import JSONField
 

-from librarian import html, dcparser
+from librarian import dcparser, html, epub, NoDublinCore

 from mutagen import id3
 
 
 from mutagen import id3
 
 


@@ -51,7 +51,7 @@ class Tag(TagBase):
     main_page = models.BooleanField(_('main page'), default=False, db_index=True, help_text=_('Show tag on main page'))
 
     user = models.ForeignKey(User, blank=True, null=True)
     main_page = models.BooleanField(_('main page'), default=False, db_index=True, help_text=_('Show tag on main page'))
 
     user = models.ForeignKey(User, blank=True, null=True)

-    book_count = models.IntegerField(_('book count'), default=0, blank=False, null=False)
+    book_count = models.IntegerField(_('book count'), blank=False, null=True)

     death = models.IntegerField(_(u'year of death'), blank=True, null=True)
     gazeta_link = models.CharField(blank=True, max_length=240)
     wiki_link = models.CharField(blank=True, max_length=240)
     death = models.IntegerField(_(u'year of death'), blank=True, null=True)
     gazeta_link = models.CharField(blank=True, max_length=240)
     wiki_link = models.CharField(blank=True, max_length=240)


@@ -98,6 +98,27 @@ class Tag(TagBase):
         """ calculates the year of public domain entry for an author """
         return self.death + 71 if self.death is not None else None
 
         """ calculates the year of public domain entry for an author """
         return self.death + 71 if self.death is not None else None
 

+    def get_count(self):
+        """ returns global book count for book tags, fragment count for themes """
+
+        if self.book_count is None:
+            if self.category == 'book':
+                # never used
+                objects = Book.objects.none()
+            elif self.category == 'theme':
+                objects = Fragment.tagged.with_all((self,))
+            else:
+                objects = Book.tagged.with_all((self,)).order_by()
+                if self.category != 'set':
+                    # eliminate descendants
+                    l_tags = Tag.objects.filter(slug__in=[book.book_tag_slug() for book in objects])
+                    descendants_keys = [book.pk for book in Book.tagged.with_any(l_tags)]
+                    if descendants_keys:
+                        objects = objects.exclude(pk__in=descendants_keys)
+            self.book_count = objects.count()
+            self.save()
+        return self.book_count
+

     @staticmethod
     def get_tag_list(tags):
         if isinstance(tags, basestring):
     @staticmethod
     def get_tag_list(tags):
         if isinstance(tags, basestring):


@@ -215,8 +236,11 @@ class Book(models.Model):
     def name(self):
         return self.title
 
     def name(self):
         return self.title
 

+    def book_tag_slug(self):
+        return ('l-' + self.slug)[:120]
+

     def book_tag(self):
     def book_tag(self):

-        slug = ('l-' + self.slug)[:120]
+        slug = self.book_tag_slug()

         book_tag, created = Tag.objects.get_or_create(slug=slug, category='book')
         if created:
             book_tag.name = self.title[:50]
         book_tag, created = Tag.objects.get_or_create(slug=slug, category='book')
         if created:
             book_tag.name = self.title[:50]


@@ -296,7 +320,7 @@ class Book(models.Model):
         book_info = dcparser.parse(xml_file)
 
         if not isinstance(xml_file, File):
         book_info = dcparser.parse(xml_file)
 
         if not isinstance(xml_file, File):

-            xml_file = File(xml_file)
+            xml_file = File(open(xml_file))

 
         try:
             return cls.from_text_and_meta(xml_file, book_info, overwrite)
 
         try:
             return cls.from_text_and_meta(xml_file, book_info, overwrite)


@@ -308,6 +332,10 @@ class Book(models.Model):
         from tempfile import NamedTemporaryFile
         from slughifi import slughifi
         from markupstring import MarkupString
         from tempfile import NamedTemporaryFile
         from slughifi import slughifi
         from markupstring import MarkupString

+        from hashlib import sha1
+        from django.core.files.base import ContentFile
+        from django.core.files.storage import default_storage
+        from StringIO import StringIO

 
         # Read book metadata
         book_base, book_slug = book_info.url.rsplit('/', 1)
 
         # Read book metadata
         book_base, book_slug = book_info.url.rsplit('/', 1)


@@ -345,7 +373,7 @@ class Book(models.Model):
                     tag.save()
                 book_tags.append(tag)
 
                     tag.save()
                 book_tags.append(tag)
 

-        book.tags = book_tags
+        book.tags = book_tags + book_shelves

 
         book_tag = book.book_tag()
 
 
         book_tag = book.book_tag()
 


@@ -376,35 +404,48 @@ class Book(models.Model):
         if html.transform(book.xml_file.path, html_file, parse_dublincore=False):
             book.html_file.save('%s.html' % book.slug, File(html_file), save=False)
 
         if html.transform(book.xml_file.path, html_file, parse_dublincore=False):
             book.html_file.save('%s.html' % book.slug, File(html_file), save=False)
 

+            # Create EPUB
+            epub_file = StringIO()
+            try:
+                epub.transform(book.xml_file, epub_file)
+                book.epub_file.save('%s.epub' % book.slug, ContentFile(epub_file.getvalue()), save=False)
+                FileRecord(slug=book.slug, type='epub', sha1=sha1(epub_file.getvalue()).hexdigest()).save()
+            except NoDublinCore:
+                pass
+

             # Extract fragments
             closed_fragments, open_fragments = html.extract_fragments(book.html_file.path)
             # Extract fragments
             closed_fragments, open_fragments = html.extract_fragments(book.html_file.path)

-            book_themes = []

             for fragment in closed_fragments.values():
             for fragment in closed_fragments.values():

-                text = fragment.to_string()
-                short_text = ''
-                if (len(MarkupString(text)) > 240):
-                    short_text = unicode(MarkupString(text)[:160])
-                new_fragment, created = Fragment.objects.get_or_create(anchor=fragment.id, book=book,
-                    defaults={'text': text, 'short_text': short_text})
-

                 try:
                     theme_names = [s.strip() for s in fragment.themes.split(',')]
                 except AttributeError:
                     continue
                 themes = []
                 for theme_name in theme_names:
                 try:
                     theme_names = [s.strip() for s in fragment.themes.split(',')]
                 except AttributeError:
                     continue
                 themes = []
                 for theme_name in theme_names:

+                    if not theme_name:
+                        continue

                     tag, created = Tag.objects.get_or_create(slug=slughifi(theme_name), category='theme')
                     if created:
                         tag.name = theme_name
                         tag.sort_key = slughifi(theme_name)
                         tag.save()
                     themes.append(tag)
                     tag, created = Tag.objects.get_or_create(slug=slughifi(theme_name), category='theme')
                     if created:
                         tag.name = theme_name
                         tag.sort_key = slughifi(theme_name)
                         tag.save()
                     themes.append(tag)

+                if not themes:
+                    continue
+
+                text = fragment.to_string()
+                short_text = ''
+                if (len(MarkupString(text)) > 240):
+                    short_text = unicode(MarkupString(text)[:160])
+                new_fragment, created = Fragment.objects.get_or_create(anchor=fragment.id, book=book,
+                    defaults={'text': text, 'short_text': short_text})
+

                 new_fragment.save()
                 new_fragment.save()

-                new_fragment.tags = set(list(book.tags) + themes + [book_tag])
-                book_themes += themes
+                new_fragment.tags = set(book_tags + themes + [book_tag])

 
 

-            book_themes = set(book_themes)
-            book.tags = list(book.tags) + list(book_themes) + book_shelves
+        # refresh cache
+        book.tag_counter
+        book.theme_counter

 
         book.save()
         return book
 
         book.save()
         return book


@@ -421,6 +462,12 @@ class Book(models.Model):
         self.save(reset_short_html=False, refresh_mp3=False)
         return tags
 
         self.save(reset_short_html=False, refresh_mp3=False)
         return tags
 

+    def reset_tag_counter(self):
+        self._tag_counter = None
+        self.save(reset_short_html=False, refresh_mp3=False)
+        if self.parent:
+            self.parent.reset_tag_counter()
+

     @property
     def tag_counter(self):
         if self._tag_counter is None:
     @property
     def tag_counter(self):
         if self._tag_counter is None:


@@ -436,6 +483,12 @@ class Book(models.Model):
         self.save(reset_short_html=False, refresh_mp3=False)
         return tags
 
         self.save(reset_short_html=False, refresh_mp3=False)
         return tags
 

+    def reset_theme_counter(self):
+        self._theme_counter = None
+        self.save(reset_short_html=False, refresh_mp3=False)
+        if self.parent:
+            self.parent.reset_theme_counter()
+

     @property
     def theme_counter(self):
         if self._theme_counter is None:
     @property
     def theme_counter(self):
         if self._theme_counter is None:


@@ -503,3 +556,34 @@ class BookStub(models.Model):
         return self.title
 
 
         return self.title
 
 

+class FileRecord(models.Model):
+    slug = models.SlugField(_('slug'), max_length=120, db_index=True)
+    type = models.CharField(_('type'), max_length=20, db_index=True)
+    sha1 = models.CharField(_('sha-1 hash'), max_length=40)
+    time = models.DateTimeField(_('time'), auto_now_add=True)
+
+    class Meta:
+        ordering = ('-time','-slug', '-type')
+        verbose_name = _('file record')
+        verbose_name_plural = _('file records')
+
+    def __unicode__(self):
+        return "%s %s.%s" % (self.sha1,  self.slug, self.type)
+
+
+def _tags_updated_handler(sender, affected_tags, **kwargs):
+    # reset tag global counter
+    Tag.objects.filter(pk__in=[tag.pk for tag in affected_tags]).update(book_count=None)
+
+    # if book tags changed, reset book tag counter
+    if isinstance(sender, Book) and \
+                Tag.objects.filter(pk__in=(tag.pk for tag in affected_tags)).\
+                    exclude(category__in=('book', 'theme', 'set')).count():
+        sender.reset_tag_counter()
+    # if fragment theme changed, reset book theme counter
+    elif isinstance(sender, Fragment) and \
+                Tag.objects.filter(pk__in=(tag.pk for tag in affected_tags)).\
+                    filter(category='theme').count():
+        sender.book.reset_theme_counter()
+tags_updated.connect(_tags_updated_handler)
+