Updated migration.

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

diff --git a/apps/catalogue/views.py b/apps/catalogue/views.py
index fd0174f..aaf57fc 100644 (file)
--- a/apps/catalogue/views.py
+++ b/apps/catalogue/views.py
@@ -7,6 +7,7 @@ import zipfile
 import sys
 import pprint
 import traceback
 import sys
 import pprint
 import traceback

+import re

 
 from django.conf import settings
 from django.template import RequestContext
 
 from django.conf import settings
 from django.template import RequestContext


@@ -22,7 +23,10 @@ from django.contrib.auth.forms import UserCreationForm, AuthenticationForm
 from django.utils import simplejson
 from django.utils.functional import Promise
 from django.utils.encoding import force_unicode
 from django.utils import simplejson
 from django.utils.functional import Promise
 from django.utils.encoding import force_unicode

+from django.utils.http import urlquote_plus

 from django.views.decorators import cache
 from django.views.decorators import cache

+from django.utils.translation import ugettext as _
+from django.views.generic.list_detail import object_list

 
 from catalogue import models
 from catalogue import forms
 
 from catalogue import models
 from catalogue import forms


@@ -80,38 +84,63 @@ def tagged_object_list(request, tags=''):
     if len([tag for tag in tags if tag.category == 'book']):
         raise Http404
     
     if len([tag for tag in tags if tag.category == 'book']):
         raise Http404
     

-    model = models.Book
-    shelf = [tag for tag in tags if tag.category == 'set']
-    shelf_is_set = (len(tags) == 1 and tags[0].category == 'set')
-    theme_is_set = len([tag for tag in tags if tag.category == 'theme']) > 0
-    if theme_is_set:
-        model = models.Fragment
-    only_author = len(tags) == 1 and tags[0].category == 'author'
-    pd_counter = only_author and tags[0].goes_to_pd()
-
-    user_is_owner = (len(shelf) and request.user.is_authenticated() and request.user == shelf[0].user)
+    theme_is_set = [tag for tag in tags if tag.category == 'theme']
+    shelf_is_set = len(tags) == 1 and tags[0].category == 'set'
+    my_shelf_is_set = shelf_is_set and request.user.is_authenticated() and request.user == tags[0].user

     
     

-    extra_where = "catalogue_tag.category NOT IN ('set', 'book')"
-    related_tags = models.Tag.objects.related_for_model(tags, model, counts=True, extra={'where': [extra_where]})
-    categories = split_tags(related_tags)
-
-    if not (theme_is_set or shelf_is_set):
-        model=models.Book.objects.filter(parent=None)
+    objects = only_author = pd_counter = categories = None
+    
+    if theme_is_set:
+        shelf_tags = [tag for tag in tags if tag.category == 'set']
+        fragment_tags = [tag for tag in tags if tag.category != 'set']
+        fragments = models.Fragment.tagged.with_all(fragment_tags)
+        
+        if shelf_tags:
+            books = models.Book.tagged.with_all(shelf_tags).order_by()
+            l_tags = [models.Tag.objects.get(slug = 'l-' + book.slug) for book in books]
+            fragments = models.Fragment.tagged.with_any(l_tags, fragments)
+        
+        related_tags = models.Tag.objects.usage_for_queryset(fragments, counts=True, 
+                            extra={'where': ["catalogue_tag.category != 'book'"]})
+        related_tags = (tag for tag in related_tags if tag not in fragment_tags)
+        categories = split_tags(related_tags)
+        
+        objects = fragments
+    else:
+        books = models.Book.tagged.with_all(tags).order_by()
+        l_tags = [models.Tag.objects.get(slug = 'l-' + book.slug) for book in books]
+        book_keys = [book.pk for book in books]
+        related_tags = models.Tag.objects.usage_for_queryset(books, counts=True, 
+                            extra={'where': ["catalogue_tag.category NOT IN ('set', 'book', 'theme')"]})
+        related_tags = (tag for tag in related_tags if tag not in tags)
+        categories = split_tags(related_tags)
+
+        fragments = models.Fragment.tagged.with_any(l_tags)
+        categories['theme'] = models.Tag.objects.usage_for_queryset(fragments, counts=True,  
+                            extra={'where': ["catalogue_tag.category = 'theme'"]})
+            
+        books = books.exclude(parent__in = book_keys)
+        objects = books
+        
+    if not objects:
+        only_author = len(tags) == 1 and tags[0].category == 'author'
+        pd_counter = only_author and tags[0].goes_to_pd()
+        objects = models.Book.objects.none()

     
     

-    return newtagging_views.tagged_object_list(
+    return object_list(

         request,
         request,

-        tag_model=models.Tag,
-        queryset_or_model=model,
-        tags=tags,
+        objects,

         template_name='catalogue/tagged_object_list.html',
         extra_context = {
             'categories': categories,
             'shelf_is_set': shelf_is_set,
             'only_author': only_author,
             'pd_counter': pd_counter,
         template_name='catalogue/tagged_object_list.html',
         extra_context = {
             'categories': categories,
             'shelf_is_set': shelf_is_set,
             'only_author': only_author,
             'pd_counter': pd_counter,

-            'user_is_owner': user_is_owner,
+            'user_is_owner': my_shelf_is_set,

             'formats_form': forms.DownloadFormatsForm(),
             'formats_form': forms.DownloadFormatsForm(),

-        },
+
+            'tags': tags,
+        }

     )
 
 
     )
 
 


@@ -170,27 +199,61 @@ def book_text(request, slug):
 # ==========
 # = Search =
 # ==========
 # ==========
 # = Search =
 # ==========

+
+def _no_diacritics_regexp(query):
+    """ returns a regexp for searching for a query without diacritics
+    
+    should be locale-aware """
+    names = {
+        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',
+        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'
+        }
+    def repl(m):
+        l = m.group()
+        return u"(%s)" % '|'.join(names[l])
+    return re.sub(u'[%s]'%(u''.join(names.keys())), repl, query)
+
+def unicode_re_escape(query):
+    """ Unicode-friendly version of re.escape """
+    return re.sub('(?u)(\W)', r'\\\1', query)
+

 def _word_starts_with(name, prefix):
 def _word_starts_with(name, prefix):

-    """returns a Q object gettings models having `name` contain a word
+    """returns a Q object getting models having `name` contain a word

     starting with `prefix`
     starting with `prefix`

+    
+    We define word characters as alphanumeric and underscore, like in JS.
+    
+    Works for MySQL, PostgreSQL, Oracle.
+    For SQLite, _sqlite* version is substituted for this.

     """
     kwargs = {}
     """
     kwargs = {}

-    if settings.DATABASE_ENGINE in ('mysql', 'postgresql_psycopg2', 'postgresql'):
-        # we must escape `prefix` so that it only matches literally
-        for special in r'\^$.*+?|(){}[]':
-            prefix = prefix.replace(special, '\\' + special)
-        
-        # we could use a [[:<:]] (word start), 
-        # but we want both `xy` and `(xy` to catch `(xyz)`
-        kwargs['%s__iregex' % name] = u"(^|[^[:alpha:]])%s" % prefix
-    else:
-        # don't know how to do a generic regex
-        # checking for simple icontain instead
-        kwargs['%s__icontains' % name] = prefix
+
+    prefix = _no_diacritics_regexp(unicode_re_escape(prefix))
+    # can't use [[:<:]] (word start), 
+    # but we want both `xy` and `(xy` to catch `(xyz)`
+    kwargs['%s__iregex' % name] = u"(^|[^[:alnum:]_])%s" % prefix
+    print kwargs['%s__iregex' % name]
+
+    return Q(**kwargs)
+
+    
+def _sqlite_word_starts_with(name, prefix):
+    """ version of _word_starts_with for SQLite 
+    
+    SQLite in Django uses Python re module
+    """
+    kwargs = {}
+    prefix = _no_diacritics_regexp(unicode_re_escape(prefix))
+    kwargs['%s__iregex' % name] = ur"(^|(?<=[^\wąćęłńóśźżĄĆĘŁŃÓŚŹŻ]))%s" % prefix

     return Q(**kwargs)
 
 
     return Q(**kwargs)
 
 

+if settings.DATABASE_ENGINE == 'sqlite3':
+    _word_starts_with = _sqlite_word_starts_with
+
+

 def _tags_starting_with(prefix, user):
 def _tags_starting_with(prefix, user):

+    prefix = prefix.lower()

     book_stubs = models.BookStub.objects.filter(_word_starts_with('title', prefix))
     books = models.Book.objects.filter(_word_starts_with('title', prefix))
     book_stubs = filter(lambda x: x not in books, book_stubs)
     book_stubs = models.BookStub.objects.filter(_word_starts_with('title', prefix))
     books = models.Book.objects.filter(_word_starts_with('title', prefix))
     book_stubs = filter(lambda x: x not in books, book_stubs)


@@ -203,31 +266,70 @@ def _tags_starting_with(prefix, user):
     return list(books) + list(tags) + list(book_stubs)
         
 
     return list(books) + list(tags) + list(book_stubs)
         
 

+
+def _get_result_link(match, tag_list):
+    if isinstance(match, models.Book) or isinstance(match, models.BookStub):
+        return match.get_absolute_url()
+    else:
+        return reverse('catalogue.views.tagged_object_list', 
+            kwargs={'tags': '/'.join(tag.slug for tag in tag_list + [match])}
+        )
+
+def _get_result_type(match):
+    if isinstance(match, models.Book) or isinstance(match, models.BookStub):
+        type = 'book'
+    else:
+        type = match.category
+    return dict(models.TAG_CATEGORIES)[type]
+    
+
+
+def find_best_matches(query, user):
+    """ Finds a Book, Tag or Bookstub best matching a query.
+    
+    Returns a with:
+      - zero elements when nothing is found,
+      - one element when a best result is found,
+      - more then one element on multiple exact matches
+    
+    Raises a ValueError on too short a query.
+    """
+    
+    query = query.lower()
+    if len(query) < 2:
+        raise ValueError("query must have at least two characters")
+    
+    result = tuple(_tags_starting_with(query, user))
+    exact_matches = tuple(res for res in result if res.name.lower() == query)
+    if exact_matches:
+        return exact_matches
+    else:
+        return result[:1]    
+
+

 def search(request):
     tags = request.GET.get('tags', '')
     prefix = request.GET.get('q', '')
 def search(request):
     tags = request.GET.get('tags', '')
     prefix = request.GET.get('q', '')

-    # Prefix must have at least 2 characters
-    if len(prefix) < 2:
-        return HttpResponse('')

     
     try:
         tag_list = models.Tag.get_tag_list(tags)
     except:
         tag_list = []
     
     
     try:
         tag_list = models.Tag.get_tag_list(tags)
     except:
         tag_list = []
     

-    result = _tags_starting_with(prefix, request.user)
-    if len(result) > 0:
-        tag = result[0]
-        if isinstance(tag, models.Book) or isinstance(tag, models.BookStub):
-            return HttpResponseRedirect(tag.get_absolute_url())
-        else:
-            tag_list.append(tag)
-            
-            return HttpResponseRedirect(reverse('catalogue.views.tagged_object_list', 
-                kwargs={'tags': '/'.join(tag.slug for tag in tag_list)}
-            ))
+    try:
+        result = find_best_matches(prefix, request.user)
+    except ValueError:
+        return render_to_response('catalogue/search_too_short.html', {'tags':tag_list, 'prefix':prefix},
+            context_instance=RequestContext(request))
+
+    if len(result) == 1:
+        return HttpResponseRedirect(_get_result_link(result[0], tag_list))
+    elif len(result) > 1:
+        return render_to_response('catalogue/search_multiple_hits.html', 
+            {'tags':tag_list, 'prefix':prefix, 'results':((x, _get_result_link(x, tag_list), _get_result_type(x)) for x in result)},
+            context_instance=RequestContext(request))

     else:
     else:

-        return render_to_response('catalogue/search_no_hits.html', {'query':prefix, 'tags':tag_list},
+        return render_to_response('catalogue/search_no_hits.html', {'tags':tag_list, 'prefix':prefix},

             context_instance=RequestContext(request))
 
 
             context_instance=RequestContext(request))
 
 


@@ -453,7 +555,7 @@ def register(request):
 @cache.never_cache
 def logout_then_redirect(request):
     auth.logout(request)
 @cache.never_cache
 def logout_then_redirect(request):
     auth.logout(request)

-    return HttpResponseRedirect(request.GET.get('next', '/'))
+    return HttpResponseRedirect(urlquote_plus(request.GET.get('next', '/'), safe='/?='))

 
 
 
 
 
 


@@ -472,7 +574,8 @@ def import_book(request):
             info = sys.exc_info()
             exception = pprint.pformat(info[1])
             tb = '\n'.join(traceback.format_tb(info[2]))
             info = sys.exc_info()
             exception = pprint.pformat(info[1])
             tb = '\n'.join(traceback.format_tb(info[2]))

-            return HttpResponse(_("An error occurred: %s\n\n%s") % (exception, tb), mimetype='text/plain')
+            _('Today is %(month)s, %(day)s.') % {'month': m, 'day': d}
+            return HttpResponse(_("An error occurred: %(exception)s\n\n%(tb)s") % {'exception':exception, 'tb':tb}, mimetype='text/plain')

         return HttpResponse(_("Book imported successfully"))
     else:
         return HttpResponse(_("Error importing file: %r") % book_import_form.errors)
         return HttpResponse(_("Book imported successfully"))
     else:
         return HttpResponse(_("Error importing file: %r") % book_import_form.errors)


@@ -484,4 +587,4 @@ def clock(request):
     in a format suitable for Date.parse()
     """
     from datetime import datetime
     in a format suitable for Date.parse()
     """
     from datetime import datetime

-    return HttpResponse(datetime.now().strftime('%Y/%m/%d %H:%M:%S'))
\ No newline at end of file
+    return HttpResponse(datetime.now().strftime('%Y/%m/%d %H:%M:%S'))