dynamic catalogue menu

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

diff --git a/apps/api/handlers.py b/apps/api/handlers.py
index 8f06dea..fddff74 100644 (file)
--- a/apps/api/handlers.py
+++ b/apps/api/handlers.py
@@ -7,6 +7,7 @@ import json
 
 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 piston.handler import AnonymousBaseHandler, BaseHandler
 from piston.utils import rc
@@ -15,6 +16,8 @@ from api.helpers import timestamp
 from api.models import Deleted
 from catalogue.forms import BookImportForm
 from catalogue.models import Book, Tag, BookMedia, Fragment
+from picture.models import Picture
+from picture.forms import PictureImportForm
 
 from stats.utils import piwik_track
 
@@ -93,13 +96,12 @@ class BookDetailHandler(BaseHandler):
 
     """
     allowed_methods = ['GET']
-    fields = ['title', 'parent'] + Book.file_types + [
+    fields = ['title', 'parent'] + Book.formats + [
         'media', 'url'] + category_singular.keys()
 
     @piwik_track
     def read(self, request, slug):
-        """ Returns details of a book, identified by a slug. """
-
+        """ Returns details of a book, identified by a slug and lang. """
         try:
             return Book.objects.get(slug=slug)
         except Book.DoesNotExist:
@@ -202,7 +204,7 @@ def _file_getter(format):
         else:
             return ''
     return get_file
-for format in Book.file_types:
+for format in Book.formats:
     setattr(BooksHandler, format, _file_getter(format))
 
 
@@ -246,9 +248,8 @@ class TagsHandler(BaseHandler):
         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
@@ -267,7 +268,6 @@ class FragmentDetailHandler(BaseHandler):
     @piwik_track
     def read(self, request, slug, anchor):
         """ Returns details of a fragment, identified by book slug and anchor. """
-
         try:
             return Fragment.objects.get(book__slug=slug, anchor=anchor)
         except Fragment.DoesNotExist:
@@ -306,7 +306,8 @@ class FragmentsHandler(BaseHandler):
     def href(cls, fragment):
         """ Returns URI in the API for the fragment. """
 
-        return API_BASE + reverse("api_fragment", args=[fragment.book.slug, fragment.anchor])
+        return API_BASE + reverse("api_fragment", 
+            args=[fragment.book.slug, fragment.anchor])
 
     @classmethod
     def url(cls, fragment):
@@ -354,8 +355,7 @@ class CatalogueHandler(BaseHandler):
     def book_dict(book, fields=None):
         all_fields = ['url', 'title', 'description',
                       'gazeta_link', 'wiki_link',
-                      ] + Book.file_types + [
-                      'mp3', 'ogg', 'daisy',
+                      ] + Book.formats + BookMedia.formats + [
                       'parent', 'parent_number',
                       'tags',
                       'license', 'license_description', 'source_name',
@@ -372,7 +372,7 @@ class CatalogueHandler(BaseHandler):
         obj = {}
         for field in fields:
 
-            if field in Book.file_types:
+            if field in Book.formats:
                 f = getattr(book, field+'_file')
                 if f:
                     obj[field] = {
@@ -380,7 +380,7 @@ class CatalogueHandler(BaseHandler):
                         'size': f.size,
                     }
 
-            elif field in ('mp3', 'ogg', 'daisy'):
+            elif field in BookMedia.formats:
                 media = []
                 for m in book.media.filter(type=field):
                     media.append({
@@ -509,7 +509,7 @@ class CatalogueHandler(BaseHandler):
                     changed_at__gte=since,
                     changed_at__lt=until):
             # 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:
@@ -532,6 +532,16 @@ 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)
+        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)
@@ -547,6 +557,10 @@ class CatalogueHandler(BaseHandler):
                 if field == 'time_checked':
                     continue
                 changes.setdefault(field, {})[model] = changes_by_type[model][field]
+
+        if not since:
+            cache.set(key, changes)
+
         return changes
 
 
@@ -572,3 +586,21 @@ class ChangesHandler(CatalogueHandler):
     @piwik_track
     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