7f6268fdb42fd512bd5063e6c7800eec187ba46e
[wolnelektury.git] / apps / catalogue / models.py
1 # -*- coding: utf-8 -*-
2 from django.db import models
3 from django.db.models import permalink, Q
4 from django.utils.translation import ugettext_lazy as _
5 from django.contrib.auth.models import User
6 from django.core.files import File
7 from django.template.loader import render_to_string
8 from django.utils.safestring import mark_safe
9 from django.core.urlresolvers import reverse
10
11 from newtagging.models import TagBase
12 from newtagging import managers
13
14 from librarian import html, dcparser
15
16
17 TAG_CATEGORIES = (
18     ('author', _('author')),
19     ('epoch', _('epoch')),
20     ('kind', _('kind')),
21     ('genre', _('genre')),
22     ('theme', _('theme')),
23     ('set', _('set')),
24 )
25
26
27 class TagSubcategoryManager(models.Manager):
28     def __init__(self, subcategory):
29         super(TagSubcategoryManager, self).__init__()
30         self.subcategory = subcategory
31         
32     def get_query_set(self):
33         return super(TagSubcategoryManager, self).get_query_set().filter(category=self.subcategory)
34
35
36 class Tag(TagBase):
37     name = models.CharField(_('name'), max_length=50, db_index=True)
38     slug = models.SlugField(_('slug'), max_length=120, unique=True, db_index=True)
39     sort_key = models.SlugField(_('sort key'), max_length=120, db_index=True)
40     category = models.CharField(_('category'), max_length=50, blank=False, null=False, 
41         db_index=True, choices=TAG_CATEGORIES)
42     description = models.TextField(_('description'), blank=True)
43     main_page = models.BooleanField(_('main page'), default=False, db_index=True, help_text=_('Show tag on main page'))
44         
45     user = models.ForeignKey(User, blank=True, null=True)
46     
47     def has_description(self):
48         return len(self.description) > 0
49     has_description.short_description = _('description')
50     has_description.boolean = True
51
52     @permalink
53     def get_absolute_url(self):
54         return ('catalogue.views.tagged_object_list', [self.slug])
55     
56     class Meta:
57         ordering = ('sort_key',)
58         verbose_name = _('tag')
59         verbose_name_plural = _('tags')
60     
61     def __unicode__(self):
62         return self.name
63
64     @staticmethod
65     def get_tag_list(tags):
66         if isinstance(tags, basestring):
67             tag_slugs = tags.split('/')
68             return [Tag.objects.get(slug=slug) for slug in tag_slugs]
69         else:
70             return TagBase.get_tag_list(tags)
71
72
73 def book_upload_path(ext):
74     def get_dynamic_path(book, filename):
75         return 'lektura/%s.%s' % (book.slug, ext)
76     return get_dynamic_path
77
78
79 class Book(models.Model):
80     title = models.CharField(_('title'), max_length=120)
81     slug = models.SlugField(_('slug'), max_length=120, unique=True, db_index=True)
82     description = models.TextField(_('description'), blank=True)
83     created_at = models.DateTimeField(_('creation date'), auto_now=True)
84     _short_html = models.TextField(_('short HTML'), editable=False)
85     parent_number = models.IntegerField(_('parent number'), default=0)
86     
87     # Formats
88     xml_file = models.FileField(_('XML file'), upload_to=book_upload_path('xml'), blank=True)
89     html_file = models.FileField(_('HTML file'), upload_to=book_upload_path('html'), blank=True)
90     pdf_file = models.FileField(_('PDF file'), upload_to=book_upload_path('pdf'), blank=True)
91     odt_file = models.FileField(_('ODT file'), upload_to=book_upload_path('odt'), blank=True)
92     txt_file = models.FileField(_('TXT file'), upload_to=book_upload_path('txt'), blank=True)
93     
94     parent = models.ForeignKey('self', blank=True, null=True, related_name='children')
95     
96     objects = models.Manager()
97     tagged = managers.ModelTaggedItemManager(Tag)
98     tags = managers.TagDescriptor(Tag)
99     
100     def short_html(self):
101         if len(self._short_html):
102             return mark_safe(self._short_html)
103         else:
104             tags = self.tags.filter(~Q(category__in=('set', 'theme')))
105             tags = [u'<a href="%s">%s</a>' % (tag.get_absolute_url(), tag.name) for tag in tags]
106
107             formats = []
108             if self.html_file:
109                 formats.append(u'<a href="%s">Czytaj online</a>' % reverse('book_text', kwargs={'slug': self.slug}))
110             if self.pdf_file:
111                 formats.append(u'<a href="%s">Plik PDF</a>' % self.pdf_file.url)
112             if self.odt_file:
113                 formats.append(u'<a href="%s">Plik ODT</a>' % self.odt_file.url)
114             
115             self._short_html = unicode(render_to_string('catalogue/book_short.html',
116                 {'book': self, 'tags': tags, 'formats': formats}))
117             self.save()
118             return mark_safe(self._short_html)
119     
120     def has_description(self):
121         return len(self.description) > 0
122     has_description.short_description = _('description')
123     has_description.boolean = True
124     
125     def has_pdf_file(self):
126         return bool(self.pdf_file)
127     has_pdf_file.short_description = 'PDF'
128     has_pdf_file.boolean = True
129     
130     def has_odt_file(self):
131         return bool(self.odt_file)
132     has_odt_file.short_description = 'ODT'
133     has_odt_file.boolean = True
134     
135     def has_html_file(self):
136         return bool(self.html_file)
137     has_html_file.short_description = 'HTML'
138     has_html_file.boolean = True
139
140     @staticmethod
141     def from_xml_file(xml_file):
142         from tempfile import NamedTemporaryFile
143         from slughifi import slughifi
144         from markupstring import MarkupString
145         
146         # Read book metadata
147         book_info = dcparser.parse(xml_file)
148         book_base, book_slug = book_info.url.rsplit('/', 1)
149         book = Book(title=book_info.title, slug=book_slug)
150         book.save()
151         
152         book_tags = []
153         for category in ('kind', 'genre', 'author', 'epoch'):    
154             tag_name = getattr(book_info, category)
155             tag_sort_key = tag_name
156             if category == 'author':
157                 tag_sort_key = tag_name.last_name
158                 tag_name = ' '.join(tag_name.first_names) + ' ' + tag_name.last_name
159             tag, created = Tag.objects.get_or_create(slug=slughifi(tag_name))
160             if created:
161                 tag.name = tag_name
162                 tag.sort_key = slughifi(tag_sort_key)
163                 tag.category = category
164                 tag.save()
165             book_tags.append(tag)
166         book.tags = book_tags
167         
168         if hasattr(book_info, 'parts'):
169             for n, part_url in enumerate(book_info.parts):
170                 base, slug = part_url.rsplit('/', 1)
171                 child_book = Book.objects.get(slug=slug)
172                 child_book.parent = book
173                 child_book.parent_number = n
174                 child_book.save()
175         
176         # Save XML and HTML files
177         book.xml_file.save('%s.xml' % book.slug, File(file(xml_file)), save=False)
178         
179         html_file = NamedTemporaryFile()
180         html.transform(book.xml_file.path, html_file)
181         book.html_file.save('%s.html' % book.slug, File(html_file), save=False)
182         
183         # Extract fragments
184         closed_fragments, open_fragments = html.extract_fragments(book.html_file.path)
185         book_themes = []
186         for fragment in closed_fragments.values():
187             text = fragment.to_string()
188             short_text = ''
189             if (len(MarkupString(text)) > 240):
190                 short_text = unicode(MarkupString(text)[:160])
191             new_fragment = Fragment(text=text, short_text=short_text, anchor=fragment.id, book=book)
192             
193             try:
194                 theme_names = [s.strip() for s in fragment.themes.split(',')]
195             except AttributeError:
196                 continue
197             themes = []
198             for theme_name in theme_names:
199                 tag, created = Tag.objects.get_or_create(slug=slughifi(theme_name))
200                 if created:
201                     tag.name = theme_name
202                     tag.sort_key = slughifi(theme_name)
203                     tag.category = 'theme'
204                     tag.save()
205                 themes.append(tag)
206             new_fragment.save()
207             new_fragment.tags = list(book.tags) + themes
208             book_themes += themes
209         
210         book_themes = set(book_themes)
211         book.tags = list(book.tags) + list(book_themes)
212         return book.save()
213     
214     @permalink
215     def get_absolute_url(self):
216         return ('catalogue.views.book_detail', [self.slug])
217         
218     class Meta:
219         ordering = ('title',)
220         verbose_name = _('book')
221         verbose_name_plural = _('books')
222
223     def __unicode__(self):
224         return self.title
225
226
227 class Fragment(models.Model):
228     text = models.TextField()
229     short_text = models.TextField(editable=False)
230     _short_html = models.TextField(editable=False)
231     anchor = models.CharField(max_length=120)
232     book = models.ForeignKey(Book, related_name='fragments')
233
234     objects = models.Manager()
235     tagged = managers.ModelTaggedItemManager(Tag)
236     tags = managers.TagDescriptor(Tag)
237     
238     def short_html(self):
239         if len(self._short_html):
240             return mark_safe(self._short_html)
241         else:
242             book_authors = [u'<a href="%s">%s</a>' % (tag.get_absolute_url(), tag.name) 
243                 for tag in self.book.tags if tag.category == 'author']
244             
245             self._short_html = unicode(render_to_string('catalogue/fragment_short.html',
246                 {'fragment': self, 'book': self.book, 'book_authors': book_authors}))
247             self.save()
248             return mark_safe(self._short_html)
249     
250     def get_absolute_url(self):
251         return '%s#m%s' % (reverse('book_text', kwargs={'slug': self.book.slug}), self.anchor)
252     
253     class Meta:
254         ordering = ('book', 'anchor',)
255         verbose_name = _('fragment')
256         verbose_name_plural = _('fragments')
257