handle no epub in opds

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

diff --git a/apps/api/handlers.py b/apps/api/handlers.py
index d34806f..0255c05 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.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
 from django.core.urlresolvers import reverse
 from piston.handler import AnonymousBaseHandler, BaseHandler
 from piston.utils import rc


@@ -35,6 +36,9 @@ 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.
 
 def read_tags(tags, allowed):
     """ Reads a path of filtering tags.


@@ -87,53 +91,64 @@ class BookMediaHandler(BaseHandler):
         return MEDIA_BASE + media.file.url
 
 
         return MEDIA_BASE + media.file.url
 
 

-class BookDetailHandler(BaseHandler):
-    """ Main handler for Book objects.
+class BookDetails(object):
+    """Custom fields used for representing Books."""
+
+    @classmethod
+    def author(cls, book):
+        return ", ".join(t.name for t in book.tags.filter(category='author'))
+
+    @classmethod
+    def href(cls, book):
+        """ Returns an URI for a Book in the API. """
+        return API_BASE + reverse("api_book", args=[book.slug])

 
 

-    Responsible for lists of Book objects
-    and fields used for representing Books.
+    @classmethod
+    def url(cls, book):
+        """ Returns Book's URL on the site. """
+
+        return WL_BASE + book.get_absolute_url()
+
+    @classmethod
+    def children(cls, book):
+        """ Returns all media for a book. """
+
+        return book.children.all()
+
+    @classmethod
+    def media(cls, book):
+        """ Returns all media for a book. """
+
+        return book.media.all()
+
+
+
+class BookDetailHandler(BaseHandler, BookDetails):
+    """ Main handler for Book objects.

 
 

+    Responsible for single Book details.

     """
     allowed_methods = ['GET']
     """
     allowed_methods = ['GET']

-    fields = ['title', 'parent'] + Book.formats + [
-        'media', 'url'] + category_singular.keys()
+    fields = ['title', 'parent', 'children'] + Book.formats + [
+        'media', 'url'] + book_tag_categories

 
     @piwik_track
     def read(self, request, book):
         """ Returns details of a book, identified by a slug and lang. """
 
     @piwik_track
     def read(self, request, book):
         """ Returns details of a book, identified by a slug and lang. """

-        kwargs = Book.split_urlid(book)
-        if not kwargs:
-            return rc.NOT_FOUND
-

         try:
         try:

-            return Book.objects.get(**kwargs)
+            return Book.objects.get(slug=book)

         except Book.DoesNotExist:
             return rc.NOT_FOUND
 
 
         except Book.DoesNotExist:
             return rc.NOT_FOUND
 
 

-class AnonymousBooksHandler(AnonymousBaseHandler):
+class AnonymousBooksHandler(AnonymousBaseHandler, BookDetails):

     """ Main handler for Book objects.
 
     """ Main handler for Book objects.
 

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

     """
     allowed_methods = ('GET',)
     model = Book
     """
     allowed_methods = ('GET',)
     model = Book

-    fields = ['href', 'title']
-
-    categories = set(['author', 'epoch', 'kind', 'genre'])
-
-    @classmethod
-    def href(cls, book):
-        """ Returns an URI for a Book in the API. """
-        return API_BASE + reverse("api_book", args=[book.urlid()])
-
-    @classmethod
-    def url(cls, book):
-        """ Returns Book's URL on the site. """
-
-        return WL_BASE + book.get_absolute_url()
+    fields = ['author', 'href', 'title', 'url']

 
     @piwik_track
     def read(self, request, tags, top_level=False):
 
     @piwik_track
     def read(self, request, tags, top_level=False):


@@ -145,13 +160,19 @@ class AnonymousBooksHandler(AnonymousBaseHandler):
              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)
                 return books if books else rc.NOT_FOUND
             else:
                 books = Book.tagged.with_all(tags)
         if tags:
             if top_level:
                 books = Book.tagged_top_level(tags)
                 return books if books else rc.NOT_FOUND
             else:
                 books = Book.tagged.with_all(tags)

+        elif top_level:
+            books = Book.objects.filter(parent=None)

         else:
             books = Book.objects.all()
 
         else:
             books = Book.objects.all()
 


@@ -161,18 +182,12 @@ class AnonymousBooksHandler(AnonymousBaseHandler):
             return rc.NOT_FOUND
 
     def create(self, request, tags, top_level=False):
             return rc.NOT_FOUND
 
     def create(self, request, tags, top_level=False):

-        return 'aaa'
+        return rc.FORBIDDEN

 
 

-    @classmethod
-    def media(self, book):
-        """ Returns all media for a book. """

 
 

-        return book.media.all()
-
-
-class BooksHandler(BaseHandler):
+class BooksHandler(BookDetailHandler):

     model = Book
     model = Book

-    fields = ('slug', 'title')
+    fields = ['author', 'href', 'title', 'url']

     anonymous = AnonymousBooksHandler
 
     def create(self, request, tags, top_level=False):
     anonymous = AnonymousBooksHandler
 
     def create(self, request, tags, top_level=False):


@@ -187,6 +202,7 @@ class BooksHandler(BaseHandler):
         else:
             return rc.NOT_FOUND
 
         else:
             return rc.NOT_FOUND
 

+

 # add categorized tags fields for Book
 def _tags_getter(category):
     @classmethod
 # add categorized tags fields for Book
 def _tags_getter(category):
     @classmethod


@@ -194,7 +210,7 @@ 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):


@@ -208,13 +224,29 @@ def _file_getter(format):
             return ''
     return get_file
 for format in Book.formats:
             return ''
     return get_file
 for format in Book.formats:

-    setattr(BooksHandler, format, _file_getter(format))
+    setattr(BookDetails, format, _file_getter(format))
+
+
+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. """

 
 

-class TagDetailHandler(BaseHandler):
+        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):
 
     @piwik_track
     def read(self, request, category, slug):


@@ -231,7 +263,7 @@ class TagDetailHandler(BaseHandler):
             return rc.NOT_FOUND
 
 
             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


@@ -240,7 +272,7 @@ 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):
 
     @piwik_track
     def read(self, request, category):


@@ -258,34 +290,42 @@ class TagsHandler(BaseHandler):
             return rc.NOT_FOUND
 
 
             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. """
+
+        return fragment.tags.filter(category='theme')

 
 
 
 

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

     fields = ['book', 'anchor', 'text', 'url', 'themes']
 
     @piwik_track
     def read(self, request, book, anchor):
         """ Returns details of a fragment, identified by book slug and anchor. """
     fields = ['book', 'anchor', 'text', 'url', 'themes']
 
     @piwik_track
     def read(self, request, book, anchor):
         """ Returns details of a fragment, identified by book slug and anchor. """

-        kwargs = Book.split_urlid(book)
-        if not kwargs:
-            return rc.NOT_FOUND
-
-        fragment_kwargs = {}
-        for field, value in kwargs.items():
-            fragment_kwargs['book__' + field] = value
-

         try:
         try:

-            return Fragment.objects.get(anchor=anchor, **fragment_kwargs)
+            return Fragment.objects.get(book__slug=book, anchor=anchor)

         except Fragment.DoesNotExist:
             return rc.NOT_FOUND
 
 
         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


@@ -293,7 +333,7 @@ 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'])


@@ -306,32 +346,16 @@ 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.urlid(), 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


@@ -542,6 +566,16 @@ 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)


@@ -557,6 +591,10 @@ 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
 
 
         return changes