apps/catalogue/views.py

   1 # -*- coding: utf-8 -*-
   2 # This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
   3 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
   4 #
   5 import re
   6 import itertools
   7
   8 from django.conf import settings
   9 from django.template import RequestContext
  10 from django.shortcuts import render_to_response, get_object_or_404
  11 from django.http import HttpResponse, HttpResponseRedirect, Http404, HttpResponsePermanentRedirect
  12 from django.core.urlresolvers import reverse
  13 from django.db.models import Q
  14 from django.contrib.auth.decorators import login_required, user_passes_test
  15 from django.utils.datastructures import SortedDict
  16 from django.utils.http import urlquote_plus
  17 from django.utils import translation
  18 from django.utils.translation import ugettext as _
  19 from django.views.decorators.cache import never_cache
  20
  21 from ajaxable.utils import JSONResponse, AjaxableFormView
  22
  23 from catalogue import models
  24 from catalogue import forms
  25 from catalogue.utils import (split_tags, AttachmentHttpResponse,
  26     async_build_pdf, MultiQuerySet)
  27 from pdcounter import models as pdcounter_models
  28 from pdcounter import views as pdcounter_views
  29 from suggest.forms import PublishingSuggestForm
  30 from picture.models import Picture
  31
  32 from os import path
  33
  34 staff_required = user_passes_test(lambda user: user.is_staff)
  35
  36
  37 def catalogue(request):
  38     tags = models.Tag.objects.exclude(
  39         category__in=('set', 'book')).exclude(book_count=0)
  40     tags = list(tags)
  41     for tag in tags:
  42         tag.count = tag.book_count
  43     categories = split_tags(tags)
  44     fragment_tags = categories.get('theme', [])
  45
  46     return render_to_response('catalogue/catalogue.html', locals(),
  47         context_instance=RequestContext(request))
  48
  49
  50 def book_list(request, filter=None, template_name='catalogue/book_list.html',
  51         context=None):
  52     """ generates a listing of all books, optionally filtered with a test function """
  53
  54     books_by_author, orphans, books_by_parent = models.Book.book_list(filter)
  55     books_nav = SortedDict()
  56     for tag in books_by_author:
  57         if books_by_author[tag]:
  58             books_nav.setdefault(tag.sort_key[0], []).append(tag)
  59
  60     return render_to_response(template_name, locals(),
  61         context_instance=RequestContext(request))
  62
  63
  64 def audiobook_list(request):
  65     return book_list(request, Q(media__type='mp3') | Q(media__type='ogg'),
  66                      template_name='catalogue/audiobook_list.html')
  67
  68
  69 def daisy_list(request):
  70     return book_list(request, Q(media__type='daisy'),
  71                      template_name='catalogue/daisy_list.html')
  72
  73
  74 def collection(request, slug):
  75     coll = get_object_or_404(models.Collection, slug=slug)
  76     slugs = coll.book_slugs.split()
  77     # allow URIs
  78     slugs = [slug.rstrip('/').rsplit('/', 1)[-1] if '/' in slug else slug
  79                 for slug in slugs]
  80     return book_list(request, Q(slug__in=slugs),
  81                      template_name='catalogue/collection.html',
  82                      context={'collection': coll})
  83
  84
  85 def differentiate_tags(request, tags, ambiguous_slugs):
  86     beginning = '/'.join(tag.url_chunk for tag in tags)
  87     unparsed = '/'.join(ambiguous_slugs[1:])
  88     options = []
  89     for tag in models.Tag.objects.exclude(category='book').filter(slug=ambiguous_slugs[0]):
  90         options.append({
  91             'url_args': '/'.join((beginning, tag.url_chunk, unparsed)).strip('/'),
  92             'tags': [tag]
  93         })
  94     return render_to_response('catalogue/differentiate_tags.html',
  95                 {'tags': tags, 'options': options, 'unparsed': ambiguous_slugs[1:]},
  96                 context_instance=RequestContext(request))
  97
  98
  99 @never_cache
 100 def tagged_object_list(request, tags=''):
 101     try:
 102         tags = models.Tag.get_tag_list(tags)
 103     except models.Tag.DoesNotExist:
 104         chunks = tags.split('/')
 105         if len(chunks) == 2 and chunks[0] == 'autor':
 106             return pdcounter_views.author_detail(request, chunks[1])
 107         else:
 108             raise Http404
 109     except models.Tag.MultipleObjectsReturned, e:
 110         return differentiate_tags(request, e.tags, e.ambiguous_slugs)
 111     except models.Tag.UrlDeprecationWarning, e:
 112         return HttpResponsePermanentRedirect(reverse('tagged_object_list', args=['/'.join(tag.url_chunk for tag in e.tags)]))
 113
 114     try:
 115         if len(tags) > settings.MAX_TAG_LIST:
 116             raise Http404
 117     except AttributeError:
 118         pass
 119
 120     if len([tag for tag in tags if tag.category == 'book']):
 121         raise Http404
 122
 123     theme_is_set = [tag for tag in tags if tag.category == 'theme']
 124     shelf_is_set = [tag for tag in tags if tag.category == 'set']
 125     only_shelf = shelf_is_set and len(tags) == 1
 126     only_my_shelf = only_shelf and request.user.is_authenticated() and request.user == tags[0].user
 127
 128     objects = only_author = None
 129     categories = {}
 130
 131     if theme_is_set:
 132         shelf_tags = [tag for tag in tags if tag.category == 'set']
 133         fragment_tags = [tag for tag in tags if tag.category != 'set']
 134         fragments = models.Fragment.tagged.with_all(fragment_tags)
 135
 136         if shelf_tags:
 137             books = models.Book.tagged.with_all(shelf_tags).order_by()
 138             l_tags = models.Tag.objects.filter(category='book', slug__in=[book.book_tag_slug() for book in books])
 139             fragments = models.Fragment.tagged.with_any(l_tags, fragments)
 140
 141         # newtagging goes crazy if we just try:
 142         #related_tags = models.Tag.objects.usage_for_queryset(fragments, counts=True,
 143         #                    extra={'where': ["catalogue_tag.category != 'book'"]})
 144         fragment_keys = [fragment.pk for fragment in fragments]
 145         if fragment_keys:
 146             related_tags = models.Fragment.tags.usage(counts=True,
 147                                 filters={'pk__in': fragment_keys},
 148                                 extra={'where': ["catalogue_tag.category != 'book'"]})
 149             related_tags = (tag for tag in related_tags if tag not in fragment_tags)
 150             categories = split_tags(related_tags)
 151
 152             objects = fragments
 153     else:
 154         if shelf_is_set:
 155             objects = models.Book.tagged.with_all(tags)
 156         else:
 157             objects = models.Book.tagged_top_level(tags)
 158
 159         # get related tags from `tag_counter` and `theme_counter`
 160         related_counts = {}
 161         tags_pks = [tag.pk for tag in tags]
 162         for book in objects:
 163             for tag_pk, value in itertools.chain(book.tag_counter.iteritems(), book.theme_counter.iteritems()):
 164                 if tag_pk in tags_pks:
 165                     continue
 166                 related_counts[tag_pk] = related_counts.get(tag_pk, 0) + value
 167         related_tags = models.Tag.objects.filter(pk__in=related_counts.keys())
 168         related_tags = [tag for tag in related_tags if tag not in tags]
 169         for tag in related_tags:
 170             tag.count = related_counts[tag.pk]
 171
 172         categories = split_tags(related_tags)
 173         del related_tags
 174
 175     if not objects:
 176         only_author = len(tags) == 1 and tags[0].category == 'author'
 177         objects = models.Book.objects.none()
 178
 179     # Add pictures
 180     objects = MultiQuerySet(Picture.tagged.with_all(tags), objects)
 181
 182     return render_to_response('catalogue/tagged_object_list.html',
 183         {
 184             'object_list': objects,
 185             'categories': categories,
 186             'only_shelf': only_shelf,
 187             'only_author': only_author,
 188             'only_my_shelf': only_my_shelf,
 189             'formats_form': forms.DownloadFormatsForm(),
 190             'tags': tags,
 191             'theme_is_set': theme_is_set,
 192         },
 193         context_instance=RequestContext(request))
 194
 195
 196 def book_fragments(request, slug, theme_slug):
 197     book = get_object_or_404(models.Book, slug=slug)
 198
 199     book_tag = book.book_tag()
 200     theme = get_object_or_404(models.Tag, slug=theme_slug, category='theme')
 201     fragments = models.Fragment.tagged.with_all([book_tag, theme])
 202
 203     return render_to_response('catalogue/book_fragments.html', locals(),
 204         context_instance=RequestContext(request))
 205
 206
 207 @never_cache
 208 def book_detail(request, slug):
 209     try:
 210         book = models.Book.objects.get(slug=slug)
 211     except models.Book.DoesNotExist:
 212         return pdcounter_views.book_stub_detail(request, slug)
 213
 214     book_children = book.children.all().order_by('parent_number', 'sort_key')
 215     return render_to_response('catalogue/book_detail.html', locals(),
 216         context_instance=RequestContext(request))
 217
 218
 219 def player(request, slug):
 220     book = get_object_or_404(models.Book, slug=slug)
 221     if not book.has_media('mp3'):
 222         raise Http404
 223
 224     ogg_files = {}
 225     for m in book.media.filter(type='ogg').order_by():
 226         ogg_files[m.name] = m
 227
 228     audiobooks = []
 229     have_oggs = True
 230     projects = set()
 231     for mp3 in book.media.filter(type='mp3'):
 232         # ogg files are always from the same project
 233         meta = mp3.get_extra_info_value()
 234         project = meta.get('project')
 235         if not project:
 236             # temporary fallback
 237             project = u'CzytamySłuchając'
 238
 239         projects.add((project, meta.get('funded_by', '')))
 240
 241         media = {'mp3': mp3}
 242
 243         ogg = ogg_files.get(mp3.name)
 244         if ogg:
 245             media['ogg'] = ogg
 246         else:
 247             have_oggs = False
 248         audiobooks.append(media)
 249     print audiobooks
 250
 251     projects = sorted(projects)
 252
 253     return render_to_response('catalogue/player.html', locals(),
 254         context_instance=RequestContext(request))
 255
 256
 257 def book_text(request, slug):
 258     book = get_object_or_404(models.Book, slug=slug)
 259
 260     if not book.has_html_file():
 261         raise Http404
 262     book_themes = {}
 263     for fragment in book.fragments.all():
 264         for theme in fragment.tags.filter(category='theme'):
 265             book_themes.setdefault(theme, []).append(fragment)
 266
 267     book_themes = book_themes.items()
 268     book_themes.sort(key=lambda s: s[0].sort_key)
 269     return render_to_response('catalogue/book_text.html', locals(),
 270         context_instance=RequestContext(request))
 271
 272
 273 # ==========
 274 # = Search =
 275 # ==========
 276
 277 def _no_diacritics_regexp(query):
 278     """ returns a regexp for searching for a query without diacritics
 279
 280     should be locale-aware """
 281     names = {
 282         u'a':u'aąĄ', u'c':u'cćĆ', u'e':u'eęĘ', u'l': u'lłŁ', u'n':u'nńŃ', u'o':u'oóÓ', u's':u'sśŚ', u'z':u'zźżŹŻ',
 283         u'ą':u'ąĄ', u'ć':u'ćĆ', u'ę':u'ęĘ', u'ł': u'łŁ', u'ń':u'ńŃ', u'ó':u'óÓ', u'ś':u'śŚ', u'ź':u'źŹ', u'ż':u'żŻ'
 284         }
 285     def repl(m):
 286         l = m.group()
 287         return u"(%s)" % '|'.join(names[l])
 288     return re.sub(u'[%s]' % (u''.join(names.keys())), repl, query)
 289
 290 def unicode_re_escape(query):
 291     """ Unicode-friendly version of re.escape """
 292     return re.sub('(?u)(\W)', r'\\\1', query)
 293
 294 def _word_starts_with(name, prefix):
 295     """returns a Q object getting models having `name` contain a word
 296     starting with `prefix`
 297
 298     We define word characters as alphanumeric and underscore, like in JS.
 299
 300     Works for MySQL, PostgreSQL, Oracle.
 301     For SQLite, _sqlite* version is substituted for this.
 302     """
 303     kwargs = {}
 304
 305     prefix = _no_diacritics_regexp(unicode_re_escape(prefix))
 306     # can't use [[:<:]] (word start),
 307     # but we want both `xy` and `(xy` to catch `(xyz)`
 308     kwargs['%s__iregex' % name] = u"(^|[^[:alnum:]_])%s" % prefix
 309
 310     return Q(**kwargs)
 311
 312
 313 def _word_starts_with_regexp(prefix):
 314     prefix = _no_diacritics_regexp(unicode_re_escape(prefix))
 315     return ur"(^|(?<=[^\wąćęłńóśźżĄĆĘŁŃÓŚŹŻ]))%s" % prefix
 316
 317
 318 def _sqlite_word_starts_with(name, prefix):
 319     """ version of _word_starts_with for SQLite
 320
 321     SQLite in Django uses Python re module
 322     """
 323     kwargs = {}
 324     kwargs['%s__iregex' % name] = _word_starts_with_regexp(prefix)
 325     return Q(**kwargs)
 326
 327
 328 if hasattr(settings, 'DATABASES'):
 329     if settings.DATABASES['default']['ENGINE'] == 'django.db.backends.sqlite3':
 330         _word_starts_with = _sqlite_word_starts_with
 331 elif settings.DATABASE_ENGINE == 'sqlite3':
 332     _word_starts_with = _sqlite_word_starts_with
 333
 334
 335 class App():
 336     def __init__(self, name, view):
 337         self.name = name
 338         self._view = view
 339         self.lower = name.lower()
 340         self.category = 'application'
 341     def view(self):
 342         return reverse(*self._view)
 343
 344 _apps = (
 345     App(u'Leśmianator', (u'lesmianator', )),
 346     )
 347
 348
 349 def _tags_starting_with(prefix, user=None):
 350     prefix = prefix.lower()
 351     # PD counter
 352     book_stubs = pdcounter_models.BookStub.objects.filter(_word_starts_with('title', prefix))
 353     authors = pdcounter_models.Author.objects.filter(_word_starts_with('name', prefix))
 354
 355     books = models.Book.objects.filter(_word_starts_with('title', prefix))
 356     tags = models.Tag.objects.filter(_word_starts_with('name', prefix))
 357     if user and user.is_authenticated():
 358         tags = tags.filter(~Q(category='book') & (~Q(category='set') | Q(user=user)))
 359     else:
 360         tags = tags.filter(~Q(category='book') & ~Q(category='set'))
 361
 362     prefix_regexp = re.compile(_word_starts_with_regexp(prefix))
 363     return list(books) + list(tags) + [app for app in _apps if prefix_regexp.search(app.lower)] + list(book_stubs) + list(authors)
 364
 365
 366 def _get_result_link(match, tag_list):
 367     if isinstance(match, models.Tag):
 368         return reverse('catalogue.views.tagged_object_list',
 369             kwargs={'tags': '/'.join(tag.url_chunk for tag in tag_list + [match])}
 370         )
 371     elif isinstance(match, App):
 372         return match.view()
 373     else:
 374         return match.get_absolute_url()
 375
 376
 377 def _get_result_type(match):
 378     if isinstance(match, models.Book) or isinstance(match, pdcounter_models.BookStub):
 379         type = 'book'
 380     else:
 381         type = match.category
 382     return type
 383
 384
 385 def books_starting_with(prefix):
 386     prefix = prefix.lower()
 387     return models.Book.objects.filter(_word_starts_with('title', prefix))
 388
 389
 390 def find_best_matches(query, user=None):
 391     """ Finds a models.Book, Tag, models.BookStub or Author best matching a query.
 392
 393     Returns a with:
 394       - zero elements when nothing is found,
 395       - one element when a best result is found,
 396       - more then one element on multiple exact matches
 397
 398     Raises a ValueError on too short a query.
 399     """
 400
 401     query = query.lower()
 402     if len(query) < 2:
 403         raise ValueError("query must have at least two characters")
 404
 405     result = tuple(_tags_starting_with(query, user))
 406     # remove pdcounter stuff
 407     book_titles = set(match.pretty_title().lower() for match in result
 408                       if isinstance(match, models.Book))
 409     authors = set(match.name.lower() for match in result
 410                   if isinstance(match, models.Tag) and match.category=='author')
 411     result = tuple(res for res in result if not (
 412                  (isinstance(res, pdcounter_models.BookStub) and res.pretty_title().lower() in book_titles)
 413                  or (isinstance(res, pdcounter_models.Author) and res.name.lower() in authors)
 414              ))
 415
 416     exact_matches = tuple(res for res in result if res.name.lower() == query)
 417     if exact_matches:
 418         return exact_matches
 419     else:
 420         return tuple(result)[:1]
 421
 422
 423 def search(request):
 424     tags = request.GET.get('tags', '')
 425     prefix = request.GET.get('q', '')
 426
 427     try:
 428         tag_list = models.Tag.get_tag_list(tags)
 429     except:
 430         tag_list = []
 431
 432     try:
 433         result = find_best_matches(prefix, request.user)
 434     except ValueError:
 435         return render_to_response('catalogue/search_too_short.html', {'tags':tag_list, 'prefix':prefix},
 436             context_instance=RequestContext(request))
 437
 438     if len(result) == 1:
 439         return HttpResponseRedirect(_get_result_link(result[0], tag_list))
 440     elif len(result) > 1:
 441         return render_to_response('catalogue/search_multiple_hits.html',
 442             {'tags':tag_list, 'prefix':prefix, 'results':((x, _get_result_link(x, tag_list), _get_result_type(x)) for x in result)},
 443             context_instance=RequestContext(request))
 444     else:
 445         form = PublishingSuggestForm(initial={"books": prefix + ", "})
 446         return render_to_response('catalogue/search_no_hits.html',
 447             {'tags':tag_list, 'prefix':prefix, "pubsuggest_form": form},
 448             context_instance=RequestContext(request))
 449
 450
 451 def tags_starting_with(request):
 452     prefix = request.GET.get('q', '')
 453     # Prefix must have at least 2 characters
 454     if len(prefix) < 2:
 455         return HttpResponse('')
 456     tags_list = []
 457     result = ""
 458     for tag in _tags_starting_with(prefix, request.user):
 459         if not tag.name in tags_list:
 460             result += "\n" + tag.name
 461             tags_list.append(tag.name)
 462     return HttpResponse(result)
 463
 464 def json_tags_starting_with(request, callback=None):
 465     # Callback for JSONP
 466     prefix = request.GET.get('q', '')
 467     callback = request.GET.get('callback', '')
 468     # Prefix must have at least 2 characters
 469     if len(prefix) < 2:
 470         return HttpResponse('')
 471     tags_list = []
 472     for tag in _tags_starting_with(prefix, request.user):
 473         if not tag.name in tags_list:
 474             tags_list.append(tag.name)
 475     if request.GET.get('mozhint', ''):
 476         result = [prefix, tags_list]
 477     else:
 478         result = {"matches": tags_list}
 479     return JSONResponse(result, callback)
 480
 481
 482 # =========
 483 # = Admin =
 484 # =========
 485 @login_required
 486 @staff_required
 487 def import_book(request):
 488     """docstring for import_book"""
 489     book_import_form = forms.BookImportForm(request.POST, request.FILES)
 490     if book_import_form.is_valid():
 491         try:
 492             book_import_form.save()
 493         except:
 494             import sys
 495             import pprint
 496             import traceback
 497             info = sys.exc_info()
 498             exception = pprint.pformat(info[1])
 499             tb = '\n'.join(traceback.format_tb(info[2]))
 500             return HttpResponse(_("An error occurred: %(exception)s\n\n%(tb)s") % {'exception':exception, 'tb':tb}, mimetype='text/plain')
 501         return HttpResponse(_("Book imported successfully"))
 502     else:
 503         return HttpResponse(_("Error importing file: %r") % book_import_form.errors)
 504
 505
 506 # info views for API
 507
 508 def book_info(request, id, lang='pl'):
 509     book = get_object_or_404(models.Book, id=id)
 510     # set language by hand
 511     translation.activate(lang)
 512     return render_to_response('catalogue/book_info.html', locals(),
 513         context_instance=RequestContext(request))
 514
 515
 516 def tag_info(request, id):
 517     tag = get_object_or_404(models.Tag, id=id)
 518     return HttpResponse(tag.description)
 519
 520
 521 def download_zip(request, format, slug=None):
 522     url = None
 523     if format in models.Book.ebook_formats:
 524         url = models.Book.zip_format(format)
 525     elif format in ('mp3', 'ogg') and slug is not None:
 526         book = get_object_or_404(models.Book, slug=slug)
 527         url = book.zip_audiobooks(format)
 528     else:
 529         raise Http404('No format specified for zip package')
 530     return HttpResponseRedirect(urlquote_plus(settings.MEDIA_URL + url, safe='/?='))
 531
 532
 533 def download_custom_pdf(request, slug, method='GET'):
 534     book = get_object_or_404(models.Book, slug=slug)
 535
 536     if request.method == method:
 537         form = forms.CustomPDFForm(method == 'GET' and request.GET or request.POST)
 538         if form.is_valid():
 539             cust = form.customizations
 540             pdf_file = models.get_customized_pdf_path(book, cust)
 541
 542             if not path.exists(pdf_file):
 543                 result = async_build_pdf.delay(book.id, cust, pdf_file)
 544                 result.wait()
 545             return AttachmentHttpResponse(file_name=("%s.pdf" % book.slug), file_path=pdf_file, mimetype="application/pdf")
 546         else:
 547             raise Http404(_('Incorrect customization options for PDF'))
 548     else:
 549         raise Http404(_('Bad method'))
 550
 551
 552 class CustomPDFFormView(AjaxableFormView):
 553     form_class = forms.CustomPDFForm
 554     title = _('Download custom PDF')
 555     submit = _('Download')
 556
 557     def __call__(self, request):
 558         from copy import copy
 559         if request.method == 'POST':
 560             request.GET = copy(request.GET)
 561             request.GET['next'] = "%s?%s" % (reverse('catalogue.views.download_custom_pdf', args=[request.GET['slug']]),
 562                                              request.POST.urlencode())
 563         return super(CustomPDFFormView, self).__call__(request)
 564
 565
 566     def success(self, *args):
 567         pass