Status update emails.

[wolnelektury.git] / apps / api / handlers.py

diff --git a/apps/api/handlers.py b/apps/api/handlers.py
index 508659e..7f74c19 100644 (file)
--- a/apps/api/handlers.py
+++ b/apps/api/handlers.py
@@ -3,19 +3,25 @@
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 
 from datetime import datetime, timedelta
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 
 from datetime import datetime, timedelta

+import json
+from urlparse import urljoin

 
 from django.conf import settings
 from django.contrib.sites.models import Site
 
 from django.conf import settings
 from django.contrib.sites.models import Site

+from django.core.cache import get_cache

 from django.core.urlresolvers import reverse
 from django.core.urlresolvers import reverse

-from django.http import Http404
-from django.shortcuts import get_object_or_404
-from piston.handler import BaseHandler
+from piston.handler import AnonymousBaseHandler, BaseHandler

 from piston.utils import rc
 from piston.utils import rc

+from sorl.thumbnail import default

 
 from api.helpers import timestamp
 from api.models import Deleted
 
 from api.helpers import timestamp
 from api.models import Deleted

-from catalogue.models import Book, Tag, BookMedia, Fragment
+from catalogue.forms import BookImportForm
+from catalogue.models import Book, Tag, BookMedia, Fragment, Collection
+from picture.models import Picture
+from picture.forms import PictureImportForm

 
 

+from stats.utils import piwik_track

 
 API_BASE = WL_BASE = MEDIA_BASE = 'http://' + Site.objects.get_current().domain
 
 
 API_BASE = WL_BASE = MEDIA_BASE = 'http://' + Site.objects.get_current().domain
 


@@ -32,13 +38,16 @@ category_plural={}
 for k, v in category_singular.items():
     category_plural[v] = k
 
 for k, v in category_singular.items():
     category_plural[v] = k
 

+book_tag_categories = ['author', 'epoch', 'kind', 'genre']
+
+

 
 def read_tags(tags, allowed):
     """ Reads a path of filtering tags.
 
     :param str tags: a path of category and slug pairs, like: authors/an-author/...
     :returns: list of Tag objects
 
 def read_tags(tags, allowed):
     """ Reads a path of filtering tags.
 
     :param str tags: a path of category and slug pairs, like: authors/an-author/...
     :returns: list of Tag objects

-    :raises: django.http.Http404
+    :raises: ValueError when tags can't be found

     """
     if not tags:
         return []
     """
     if not tags:
         return []


@@ -52,16 +61,19 @@ def read_tags(tags, allowed):
         try:
             category = category_singular[category]
         except KeyError:
         try:
             category = category_singular[category]
         except KeyError:

-            raise Http404
+            raise ValueError('Unknown category.')

 
         if not category in allowed:
 
         if not category in allowed:

-            raise Http404
+            raise ValueError('Category not allowed.')

 
         # !^%@#$^#!
         if category == 'book':
             slug = 'l-' + slug
 
 
         # !^%@#$^#!
         if category == 'book':
             slug = 'l-' + slug
 

-        real_tags.append(get_object_or_404(Tag, category=category, slug=slug))
+        try:
+            real_tags.append(Tag.objects.get(category=category, slug=slug))
+        except Tag.DoesNotExist:
+            raise ValueError('Tag not found')

     return real_tags
 
 
     return real_tags
 
 


@@ -72,7 +84,7 @@ class BookMediaHandler(BaseHandler):
     """ Responsible for representing media in Books. """
 
     model = BookMedia
     """ Responsible for representing media in Books. """
 
     model = BookMedia

-    fields = ['name', 'type', 'url']
+    fields = ['name', 'type', 'url', 'artist', 'director']

 
     @classmethod
     def url(cls, media):
 
     @classmethod
     def url(cls, media):


@@ -80,37 +92,22 @@ class BookMediaHandler(BaseHandler):
 
         return MEDIA_BASE + media.file.url
 
 
         return MEDIA_BASE + media.file.url
 

+    @classmethod
+    def artist(cls, media):
+        return media.extra_info.get('artist_name', '')

 
 

-class BookDetailHandler(BaseHandler):
-    """ Main handler for Book objects.
-
-    Responsible for lists of Book objects
-    and fields used for representing Books.
-
-    """
-    allowed_methods = ['GET']
-    fields = ['title', 'parent',
-        'xml', 'html', 'pdf', 'epub', 'txt',
-        'media', 'url'] + category_singular.keys()
-
-    def read(self, request, slug):
-        """ Returns details of a book, identified by a slug. """
-
-        return get_object_or_404(Book, slug=slug)
-
-
-class BooksHandler(BaseHandler):
-    """ Main handler for Book objects.
+    @classmethod
+    def director(cls, media):
+        return media.extra_info.get('director_name', '')
+        

 
 

-    Responsible for lists of Book objects
-    and fields used for representing Books.

 
 

-    """
-    allowed_methods = ('GET',)
-    model = Book
-    fields = ['href', 'title']
+class BookDetails(object):
+    """Custom fields used for representing Books."""

 
 

-    categories = set(['author', 'epoch', 'kind', 'genre'])
+    @classmethod
+    def author(cls, book):
+        return ",".join(t[0] for t in book.related_info()['tags'].get('author', []))

 
     @classmethod
     def href(cls, book):
 
     @classmethod
     def href(cls, book):


@@ -123,7 +120,59 @@ class BooksHandler(BaseHandler):
 
         return WL_BASE + book.get_absolute_url()
 
 
         return WL_BASE + book.get_absolute_url()
 

-    def read(self, request, tags, top_level=False):
+    @classmethod
+    def children(cls, book):
+        """ Returns all children for a book. """
+
+        return book.children.all()
+
+    @classmethod
+    def media(cls, book):
+        """ Returns all media for a book. """
+        return book.media.all()
+
+    @classmethod
+    def cover(cls, book):
+        return MEDIA_BASE + book.cover.url if book.cover else ''
+
+    @classmethod
+    def cover_thumb(cls, book):
+        return MEDIA_BASE + default.backend.get_thumbnail(
+                    book.cover, "139x193").url if book.cover else ''
+
+
+
+class BookDetailHandler(BaseHandler, BookDetails):
+    """ Main handler for Book objects.
+
+    Responsible for single Book details.
+    """
+    allowed_methods = ['GET']
+    fields = ['title', 'parent', 'children'] + Book.formats + [
+        'media', 'url', 'cover', 'cover_thumb'] + [
+            category_plural[c] for c in book_tag_categories]
+
+    @piwik_track
+    def read(self, request, book):
+        """ Returns details of a book, identified by a slug and lang. """
+        try:
+            return Book.objects.get(slug=book)
+        except Book.DoesNotExist:
+            return rc.NOT_FOUND
+
+
+class AnonymousBooksHandler(AnonymousBaseHandler, BookDetails):
+    """ Main handler for Book objects.
+
+    Responsible for lists of Book objects.
+    """
+    allowed_methods = ('GET',)
+    model = Book
+    fields = ['author', 'href', 'title', 'url', 'cover']
+
+    @piwik_track
+    def read(self, request, tags, top_level=False,
+                audiobooks=False, daisy=False):

         """ Lists all books with given tags.
 
         :param tags: filtering tags; should be a path of categories
         """ Lists all books with given tags.
 
         :param tags: filtering tags; should be a path of categories


@@ -132,7 +181,11 @@ class BooksHandler(BaseHandler):
              it's children are aren't. By default all books matching the tags
              are returned.
         """
              it's children are aren't. By default all books matching the tags
              are returned.
         """

-        tags = read_tags(tags, allowed=self.categories)
+        try:
+            tags = read_tags(tags, allowed=book_tag_categories)
+        except ValueError:
+            return rc.NOT_FOUND
+

         if tags:
             if top_level:
                 books = Book.tagged_top_level(tags)
         if tags:
             if top_level:
                 books = Book.tagged_top_level(tags)


@@ -141,17 +194,44 @@ class BooksHandler(BaseHandler):
                 books = Book.tagged.with_all(tags)
         else:
             books = Book.objects.all()
                 books = Book.tagged.with_all(tags)
         else:
             books = Book.objects.all()

+            
+        if top_level:
+            books = books.filter(parent=None)
+        if audiobooks:
+            books = books.filter(media__type='mp3').distinct()
+        if daisy:
+            books = books.filter(media__type='daisy').distinct()

 
         if books.exists():
             return books
         else:
             return rc.NOT_FOUND
 
 
         if books.exists():
             return books
         else:
             return rc.NOT_FOUND
 

-    @classmethod
-    def media(self, book):
-        """ Returns all media for a book. """
+    def create(self, request, *args, **kwargs):
+        return rc.FORBIDDEN

 
 

-        return book.media.all()
+
+class BooksHandler(BookDetailHandler):
+    allowed_methods = ('GET', 'POST')
+    model = Book
+    fields = ['author', 'href', 'title', 'url']
+    anonymous = AnonymousBooksHandler
+
+    def create(self, request, *args, **kwargs):
+        if not request.user.has_perm('catalogue.add_book'):
+            return rc.FORBIDDEN
+
+        data = json.loads(request.POST.get('data'))
+        form = BookImportForm(data)
+        if form.is_valid():
+            form.save()
+            return rc.CREATED
+        else:
+            return rc.NOT_FOUND
+
+
+class EBooksHandler(AnonymousBooksHandler):
+    fields = ('author', 'href', 'title', 'cover') + tuple(Book.ebook_formats)

 
 
 # add categorized tags fields for Book
 
 
 # add categorized tags fields for Book


@@ -161,7 +241,7 @@ def _tags_getter(category):
         return book.tags.filter(category=category)
     return get_tags
 for plural, singular in category_singular.items():
         return book.tags.filter(category=category)
     return get_tags
 for plural, singular in category_singular.items():

-    setattr(BooksHandler, plural, _tags_getter(singular))
+    setattr(BookDetails, plural, _tags_getter(singular))

 
 # add fields for files in Book
 def _file_getter(format):
 
 # add fields for files in Book
 def _file_getter(format):


@@ -174,15 +254,78 @@ def _file_getter(format):
         else:
             return ''
     return get_file
         else:
             return ''
     return get_file

-for format in ('xml', 'txt', 'html', 'epub', 'pdf'):
-    setattr(BooksHandler, format, _file_getter(format))
+for format in Book.formats:
+    setattr(BookDetails, format, _file_getter(format))
+
+
+class CollectionDetails(object):
+    """Custom Collection fields."""
+
+    @classmethod
+    def href(cls, collection):
+        """ Returns URI in the API for the collection. """
+
+        return API_BASE + reverse("api_collection", args=[collection.slug])
+
+    @classmethod
+    def url(cls, collection):
+        """ Returns URL on the site. """
+
+        return WL_BASE + collection.get_absolute_url()
+
+    @classmethod
+    def books(cls, collection):
+        return Book.objects.filter(collection.get_query())

 
 
 
 

-class TagDetailHandler(BaseHandler):
+
+class CollectionDetailHandler(BaseHandler, CollectionDetails):
+    allowed_methods = ('GET',)
+    fields = ['url', 'title', 'description', 'books']
+
+    @piwik_track
+    def read(self, request, slug):
+        print slug
+        """ Returns details of a collection, identified by slug. """
+        try:
+            return Collection.objects.get(slug=slug)
+        except Collection.DoesNotExist:
+            return rc.NOT_FOUND
+
+
+class CollectionsHandler(BaseHandler, CollectionDetails):
+    allowed_methods = ('GET',)
+    model = Collection
+    fields = ['url', 'href', 'title']
+
+    @piwik_track
+    def read(self, request):
+        """ Returns all collections. """
+        return Collection.objects.all()
+
+
+class TagDetails(object):
+    """Custom Tag fields."""
+
+    @classmethod
+    def href(cls, tag):
+        """ Returns URI in the API for the tag. """
+
+        return API_BASE + reverse("api_tag", args=[category_plural[tag.category], tag.slug])
+
+    @classmethod
+    def url(cls, tag):
+        """ Returns URL on the site. """
+
+        return WL_BASE + tag.get_absolute_url()
+
+
+class TagDetailHandler(BaseHandler, TagDetails):

     """ Responsible for details of a single Tag object. """
 
     """ Responsible for details of a single Tag object. """
 

-    fields = ['name', 'sort_key', 'description']
+    fields = ['name', 'url', 'sort_key', 'description']

 
 

+    @piwik_track

     def read(self, request, category, slug):
         """ Returns details of a tag, identified by category and slug. """
 
     def read(self, request, category, slug):
         """ Returns details of a tag, identified by category and slug. """
 


@@ -191,10 +334,13 @@ class TagDetailHandler(BaseHandler):
         except KeyError, e:
             return rc.NOT_FOUND
 
         except KeyError, e:
             return rc.NOT_FOUND
 

-        return get_object_or_404(Tag, category=category_sng, slug=slug)
+        try:
+            return Tag.objects.get(category=category_sng, slug=slug)
+        except Tag.DoesNotExist:
+            return rc.NOT_FOUND

 
 
 
 

-class TagsHandler(BaseHandler):
+class TagsHandler(BaseHandler, TagDetails):

     """ Main handler for Tag objects.
 
     Responsible for lists of Tag objects
     """ Main handler for Tag objects.
 
     Responsible for lists of Tag objects


@@ -203,8 +349,9 @@ class TagsHandler(BaseHandler):
     """
     allowed_methods = ('GET',)
     model = Tag
     """
     allowed_methods = ('GET',)
     model = Tag

-    fields = ['name', 'href']
+    fields = ['name', 'href', 'url']

 
 

+    @piwik_track

     def read(self, request, category):
         """ Lists all tags in the category (eg. all themes). """
 
     def read(self, request, category):
         """ Lists all tags in the category (eg. all themes). """
 


@@ -213,31 +360,49 @@ class TagsHandler(BaseHandler):
         except KeyError, e:
             return rc.NOT_FOUND
 
         except KeyError, e:
             return rc.NOT_FOUND
 

-        tags = Tag.objects.filter(category=category_sng)
-        tags = [t for t in tags if t.get_count() > 0]
-        if tags:
+        tags = Tag.objects.filter(category=category_sng).exclude(book_count=0)
+        if tags.exists():

             return tags
         else:
             return rc.NOT_FOUND
 
 
             return tags
         else:
             return rc.NOT_FOUND
 
 

+class FragmentDetails(object):
+    """Custom Fragment fields."""
+

     @classmethod
     @classmethod

-    def href(cls, tag):
-        """ Returns URI in the API for the tag. """
+    def href(cls, fragment):
+        """ Returns URI in the API for the fragment. """

 
 

-        return API_BASE + reverse("api_tag", args=[category_plural[tag.category], tag.slug])
+        return API_BASE + reverse("api_fragment", 
+            args=[fragment.book.slug, fragment.anchor])

 
 

+    @classmethod
+    def url(cls, fragment):
+        """ Returns URL on the site for the fragment. """
+
+        return WL_BASE + fragment.get_absolute_url()
+
+    @classmethod
+    def themes(cls, fragment):
+        """ Returns a list of theme tags for the fragment. """

 
 

-class FragmentDetailHandler(BaseHandler):
+        return fragment.tags.filter(category='theme')
+
+
+class FragmentDetailHandler(BaseHandler, FragmentDetails):

     fields = ['book', 'anchor', 'text', 'url', 'themes']
 
     fields = ['book', 'anchor', 'text', 'url', 'themes']
 

-    def read(self, request, slug, anchor):
+    @piwik_track
+    def read(self, request, book, anchor):

         """ Returns details of a fragment, identified by book slug and anchor. """
         """ Returns details of a fragment, identified by book slug and anchor. """

-
-        return get_object_or_404(Fragment, book__slug=slug, anchor=anchor)
+        try:
+            return Fragment.objects.get(book__slug=book, anchor=anchor)
+        except Fragment.DoesNotExist:
+            return rc.NOT_FOUND

 
 
 
 

-class FragmentsHandler(BaseHandler):
+class FragmentsHandler(BaseHandler, FragmentDetails):

     """ Main handler for Fragments.
 
     Responsible for lists of Fragment objects
     """ Main handler for Fragments.
 
     Responsible for lists of Fragment objects


@@ -245,11 +410,12 @@ class FragmentsHandler(BaseHandler):
 
     """
     model = Fragment
 
     """
     model = Fragment

-    fields = ['book', 'anchor', 'href']
+    fields = ['book', 'url', 'anchor', 'href']

     allowed_methods = ('GET',)
 
     categories = set(['author', 'epoch', 'kind', 'genre', 'book', 'theme'])
 
     allowed_methods = ('GET',)
 
     categories = set(['author', 'epoch', 'kind', 'genre', 'book', 'theme'])
 

+    @piwik_track

     def read(self, request, tags):
         """ Lists all fragments with given book, tags, themes.
 
     def read(self, request, tags):
         """ Lists all fragments with given book, tags, themes.
 


@@ -257,32 +423,16 @@ class FragmentsHandler(BaseHandler):
              books/book-slug/authors/an-author/themes/a-theme/
 
         """
              books/book-slug/authors/an-author/themes/a-theme/
 
         """

-        tags = read_tags(tags, allowed=self.categories)
+        try:
+            tags = read_tags(tags, allowed=self.categories)
+        except ValueError:
+            return rc.NOT_FOUND

         fragments = Fragment.tagged.with_all(tags).select_related('book')
         if fragments.exists():
             return fragments
         else:
             return rc.NOT_FOUND
 
         fragments = Fragment.tagged.with_all(tags).select_related('book')
         if fragments.exists():
             return fragments
         else:
             return rc.NOT_FOUND
 

-    @classmethod
-    def href(cls, fragment):
-        """ Returns URI in the API for the fragment. """
-
-        return API_BASE + reverse("api_fragment", args=[fragment.book.slug, fragment.anchor])
-
-    @classmethod
-    def url(cls, fragment):
-        """ Returns URL on the site for the fragment. """
-
-        return WL_BASE + fragment.get_absolute_url()
-
-    @classmethod
-    def themes(cls, fragment):
-        """ Returns a list of theme tags for the fragment. """
-
-        return fragment.tags.filter(category='theme')
-
-

 
 
 # Changes handlers
 
 
 # Changes handlers


@@ -314,27 +464,26 @@ class CatalogueHandler(BaseHandler):
 
     @staticmethod
     def book_dict(book, fields=None):
 
     @staticmethod
     def book_dict(book, fields=None):

-        all_fields = ('url', 'title', 'description',
+        all_fields = ['url', 'title', 'description',

                       'gazeta_link', 'wiki_link',
                       'gazeta_link', 'wiki_link',

-                      'xml', 'epub', 'txt', 'pdf', 'html',
-                      'mp3', 'ogg', 'daisy',
+                      ] + Book.formats + BookMedia.formats.keys() + [

                       'parent', 'parent_number',
                       'tags',
                       'license', 'license_description', 'source_name',
                       'technical_editors', 'editors',
                       'author', 'sort_key',
                       'parent', 'parent_number',
                       'tags',
                       'license', 'license_description', 'source_name',
                       'technical_editors', 'editors',
                       'author', 'sort_key',

-                     )
+                     ]

         if fields:
             fields = (f for f in fields if f in all_fields)
         else:
             fields = all_fields
 
         if fields:
             fields = (f for f in fields if f in all_fields)
         else:
             fields = all_fields
 

-        extra_info = book.get_extra_info_value()
+        extra_info = book.extra_info

 
         obj = {}
         for field in fields:
 
 
         obj = {}
         for field in fields:
 

-            if field in ('xml', 'epub', 'txt', 'pdf', 'html'):
+            if field in Book.formats:

                 f = getattr(book, field+'_file')
                 if f:
                     obj[field] = {
                 f = getattr(book, field+'_file')
                 if f:
                     obj[field] = {


@@ -342,9 +491,9 @@ class CatalogueHandler(BaseHandler):
                         'size': f.size,
                     }
 
                         'size': f.size,
                     }
 

-            elif field in ('mp3', 'ogg', 'daisy'):
+            elif field in BookMedia.formats:

                 media = []
                 media = []

-                for m in book.media.filter(type=field):
+                for m in book.media.filter(type=field).iterator():

                     media.append({
                         'url': m.file.url,
                         'size': m.file.size,
                     media.append({
                         'url': m.file.url,
                         'size': m.file.size,


@@ -356,10 +505,10 @@ class CatalogueHandler(BaseHandler):
                 obj[field] = book.get_absolute_url()
 
             elif field == 'tags':
                 obj[field] = book.get_absolute_url()
 
             elif field == 'tags':

-                obj[field] = [t.id for t in book.tags.exclude(category__in=('book', 'set'))]
+                obj[field] = [t.id for t in book.tags.exclude(category__in=('book', 'set')).iterator()]

 
             elif field == 'author':
 
             elif field == 'author':

-                obj[field] = ", ".join(t.name for t in book.tags.filter(category='author'))
+                obj[field] = ", ".join(t.name for t in book.tags.filter(category='author').iterator())

 
             elif field == 'parent':
                 obj[field] = book.parent_id
 
             elif field == 'parent':
                 obj[field] = book.parent_id


@@ -396,7 +545,7 @@ class CatalogueHandler(BaseHandler):
 
         last_change = since
         for book in Book.objects.filter(changed_at__gte=since,
 
         last_change = since
         for book in Book.objects.filter(changed_at__gte=since,

-                    changed_at__lt=until):
+                    changed_at__lt=until).iterator():

             book_d = cls.book_dict(book, fields)
             updated.append(book_d)
         if updated:
             book_d = cls.book_dict(book, fields)
             updated.append(book_d)
         if updated:


@@ -405,7 +554,7 @@ class CatalogueHandler(BaseHandler):
         for book in Deleted.objects.filter(content_type=Book, 
                     deleted_at__gte=since,
                     deleted_at__lt=until,
         for book in Deleted.objects.filter(content_type=Book, 
                     deleted_at__gte=since,
                     deleted_at__lt=until,

-                    created_at__lt=since):
+                    created_at__lt=since).iterator():

             deleted.append(book.id)
         if deleted:
             changes['deleted'] = deleted
             deleted.append(book.id)
         if deleted:
             changes['deleted'] = deleted


@@ -431,7 +580,7 @@ class CatalogueHandler(BaseHandler):
                 obj[field] = tag.get_absolute_url()
 
             elif field == 'books':
                 obj[field] = tag.get_absolute_url()
 
             elif field == 'books':

-                obj[field] = [b.id for b in Book.tagged_top_level([tag])]
+                obj[field] = [b.id for b in Book.tagged_top_level([tag]).iterator()]

 
             elif field == 'sort_key':
                 obj[field] = tag.sort_key
 
             elif field == 'sort_key':
                 obj[field] = tag.sort_key


@@ -469,9 +618,9 @@ class CatalogueHandler(BaseHandler):
 
         for tag in Tag.objects.filter(category__in=categories, 
                     changed_at__gte=since,
 
         for tag in Tag.objects.filter(category__in=categories, 
                     changed_at__gte=since,

-                    changed_at__lt=until):
+                    changed_at__lt=until).iterator():

             # only serve non-empty tags
             # only serve non-empty tags

-            if tag.get_count():
+            if tag.book_count:

                 tag_d = cls.tag_dict(tag, fields)
                 updated.append(tag_d)
             elif tag.created_at < since:
                 tag_d = cls.tag_dict(tag, fields)
                 updated.append(tag_d)
             elif tag.created_at < since:


@@ -483,7 +632,7 @@ class CatalogueHandler(BaseHandler):
                 content_type=Tag, 
                     deleted_at__gte=since,
                     deleted_at__lt=until,
                 content_type=Tag, 
                     deleted_at__gte=since,
                     deleted_at__lt=until,

-                    created_at__lt=since):
+                    created_at__lt=since).iterator():

             deleted.append(tag.id)
         if deleted:
             changes['deleted'] = deleted
             deleted.append(tag.id)
         if deleted:
             changes['deleted'] = deleted


@@ -494,6 +643,16 @@ class CatalogueHandler(BaseHandler):
     def changes(cls, request=None, since=0, until=None, book_fields=None,
                 tag_fields=None, tag_categories=None):
         until = cls.until(until)
     def changes(cls, request=None, since=0, until=None, book_fields=None,
                 tag_fields=None, tag_categories=None):
         until = cls.until(until)

+        since = int(since)
+
+        if not since:
+            cache = get_cache('api')
+            key = hash((book_fields, tag_fields, tag_categories,
+                    tuple(sorted(request.GET.items()))
+                  ))
+            value = cache.get(key)
+            if value is not None:
+                return value

 
         changes = {
             'time_checked': timestamp(until)
 
         changes = {
             'time_checked': timestamp(until)


@@ -509,12 +668,17 @@ class CatalogueHandler(BaseHandler):
                 if field == 'time_checked':
                     continue
                 changes.setdefault(field, {})[model] = changes_by_type[model][field]
                 if field == 'time_checked':
                     continue
                 changes.setdefault(field, {})[model] = changes_by_type[model][field]

+
+        if not since:
+            cache.set(key, changes)
+

         return changes
 
 
 class BookChangesHandler(CatalogueHandler):
     allowed_methods = ('GET',)
 
         return changes
 
 
 class BookChangesHandler(CatalogueHandler):
     allowed_methods = ('GET',)
 

+    @piwik_track

     def read(self, request, since):
         return self.book_changes(request, since)
 
     def read(self, request, since):
         return self.book_changes(request, since)
 


@@ -522,6 +686,7 @@ class BookChangesHandler(CatalogueHandler):
 class TagChangesHandler(CatalogueHandler):
     allowed_methods = ('GET',)
 
 class TagChangesHandler(CatalogueHandler):
     allowed_methods = ('GET',)
 

+    @piwik_track

     def read(self, request, since):
         return self.tag_changes(request, since)
 
     def read(self, request, since):
         return self.tag_changes(request, since)
 


@@ -529,5 +694,24 @@ class TagChangesHandler(CatalogueHandler):
 class ChangesHandler(CatalogueHandler):
     allowed_methods = ('GET',)
 
 class ChangesHandler(CatalogueHandler):
     allowed_methods = ('GET',)
 

+    @piwik_track

     def read(self, request, since):
         return self.changes(request, since)
     def read(self, request, since):
         return self.changes(request, since)

+
+
+class PictureHandler(BaseHandler):
+    model = Picture
+    fields = ('slug', 'title')
+    allowed_methods = ('POST',)
+
+    def create(self, request):
+        if not request.user.has_perm('picture.add_picture'):
+            return rc.FORBIDDEN
+
+        data = json.loads(request.POST.get('data'))
+        form = PictureImportForm(data)
+        if form.is_valid():
+            form.save()
+            return rc.CREATED
+        else:
+            return rc.NOT_FOUND