Preserve the weirdness of the API.
[wolnelektury.git] / src / api / handlers.py
index 5fe931e..7178b9f 100644 (file)
@@ -6,23 +6,31 @@ import json
 
 from django.contrib.sites.models import Site
 from django.core.urlresolvers import reverse
+from django.db.models import Q
+from django.http.response import HttpResponse
 from django.utils.functional import lazy
+from django.db import models
+from migdal.models import Entry
 from piston.handler import AnonymousBaseHandler, BaseHandler
 from piston.utils import rc
 from sorl.thumbnail import default
 
+from api.models import BookUserData
+from catalogue.api.helpers import books_after, order_books
 from catalogue.forms import BookImportForm
-from catalogue.models import Book, Tag, BookMedia, Fragment, Collection
+from catalogue.models import Book, Tag, BookMedia
+from catalogue.models.tag import prefetch_relations
+from paypal.rest import user_is_subscribed
 from picture.models import Picture
 from picture.forms import PictureImportForm
+from social.utils import likes
 
 from stats.utils import piwik_track
+from wolnelektury.utils import re_escape
 
-from . import emitters # Register our emitters
 
 API_BASE = WL_BASE = MEDIA_BASE = lazy(
-    lambda: u'http://' + Site.objects.get_current().domain, unicode)()
-
+    lambda: u'https://' + Site.objects.get_current().domain, unicode)()
 
 category_singular = {
     'authors': 'author',
@@ -38,15 +46,30 @@ for k, v in category_singular.items():
 
 book_tag_categories = ['author', 'epoch', 'kind', 'genre']
 
+book_list_fields = book_tag_categories + [
+    'href', 'title', 'url', 'cover', 'cover_thumb', 'slug', 'simple_thumb', 'has_audio', 'cover_color', 'full_sort_key']
 
 
-def read_tags(tags, allowed):
+def read_tags(tags, request, 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: ValueError when tags can't be found
     """
+
+    def process(category, slug):
+        if category == 'book':
+            # FIXME: Unused?
+            try:
+                books.append(Book.objects.get(slug=slug))
+            except Book.DoesNotExist:
+                raise ValueError('Unknown book.')
+        try:
+            real_tags.append(Tag.objects.get(category=category, slug=slug))
+        except Tag.DoesNotExist:
+            raise ValueError('Tag not found')
+
     if not tags:
         return [], []
 
@@ -62,44 +85,23 @@ def read_tags(tags, allowed):
         except KeyError:
             raise ValueError('Unknown category.')
 
-        if not category in allowed:
+        if category not in allowed:
             raise ValueError('Category not allowed.')
-
-        if category == 'book':
-            try:
-                books.append(Book.objects.get(slug=slug))
-            except Book.DoesNotExist:
-                raise ValueError('Unknown book.')
-
-        try:
-            real_tags.append(Tag.objects.get(category=category, slug=slug))
-        except Tag.DoesNotExist:
-            raise ValueError('Tag not found')
+        process(category, slug)
+
+    for key in request.GET:
+        if key in category_singular:
+            category = category_singular[key]
+            if category in allowed:
+                for slug in request.GET.getlist(key):
+                    process(category, slug)
     return real_tags, books
 
 
 # RESTful handlers
 
 
-class BookMediaHandler(BaseHandler):
-    """ Responsible for representing media in Books. """
-
-    model = BookMedia
-    fields = ['name', 'type', 'url', 'artist', 'director']
-
-    @classmethod
-    def url(cls, media):
-        """ Link to media on site. """
-
-        return MEDIA_BASE + media.file.url
 
-    @classmethod
-    def artist(cls, media):
-        return media.extra_info.get('artist_name', '')
-
-    @classmethod
-    def director(cls, media):
-        return media.extra_info.get('director_name', '')
 
 
 class BookDetails(object):
@@ -108,19 +110,17 @@ class BookDetails(object):
     @classmethod
     def href(cls, book):
         """ Returns an URI for a Book in the API. """
-        return API_BASE + reverse("api_book", args=[book.slug])
+        return API_BASE + reverse("catalogue_api_book", args=[book.slug])
 
     @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 children for a book. """
-
-        return book.children.all()
+        return book.children.order_by('parent_number', 'sort_key')
 
     @classmethod
     def media(cls, book):
@@ -136,6 +136,13 @@ class BookDetails(object):
         return MEDIA_BASE + default.backend.get_thumbnail(
                     book.cover, "139x193").url if book.cover else ''
 
+    @classmethod
+    def simple_thumb(cls, book):
+        return MEDIA_BASE + book.cover_api_thumb.url if book.cover_api_thumb else ''
+
+    @classmethod
+    def simple_cover(cls, book):
+        return MEDIA_BASE + book.simple_cover.url if book.simple_cover else ''
 
 
 class BookDetailHandler(BaseHandler, BookDetails):
@@ -145,7 +152,8 @@ class BookDetailHandler(BaseHandler, BookDetails):
     """
     allowed_methods = ['GET']
     fields = ['title', 'parent', 'children'] + Book.formats + [
-        'media', 'url', 'cover', 'cover_thumb'] + [
+        'media', 'url', 'cover', 'cover_thumb', 'simple_thumb', 'simple_cover', 'fragment_data', 'audio_length',
+        'preview', 'cover_color'] + [
             category_plural[c] for c in book_tag_categories]
 
     @piwik_track
@@ -164,16 +172,18 @@ class AnonymousBooksHandler(AnonymousBaseHandler, BookDetails):
     """
     allowed_methods = ('GET',)
     model = Book
-    fields = book_tag_categories + ['href', 'title', 'url', 'cover', 'cover_thumb']
+    fields = book_list_fields
 
+    # FIXME: Unused?
     @classmethod
     def genres(cls, book):
         """ Returns all media for a book. """
         return book.tags.filter(category='genre')
 
     @piwik_track
-    def read(self, request, tags=None, top_level=False,
-                audiobooks=False, daisy=False, pk=None):
+    def read(self, request, tags=None, top_level=False, audiobooks=False, daisy=False, pk=None,
+             recommended=False, newest=False, books=None,
+             after=None, count=None):
         """ Lists all books with given tags.
 
         :param tags: filtering tags; should be a path of categories
@@ -183,16 +193,23 @@ class AnonymousBooksHandler(AnonymousBaseHandler, BookDetails):
              are returned.
         """
         if pk is not None:
+            # FIXME: Unused?
             try:
                 return Book.objects.get(pk=pk)
             except Book.DoesNotExist:
                 return rc.NOT_FOUND
 
         try:
-            tags, _ancestors = read_tags(tags, allowed=book_tag_categories)
+            tags, _ancestors = read_tags(tags, request, allowed=book_tag_categories)
         except ValueError:
             return rc.NOT_FOUND
 
+        new_api = request.GET.get('new_api')
+        if 'after' in request.GET:
+            after = request.GET['after']
+        if 'count' in request.GET:
+            count = request.GET['count']
+
         if tags:
             if top_level:
                 books = Book.tagged_top_level(tags)
@@ -200,7 +217,8 @@ class AnonymousBooksHandler(AnonymousBaseHandler, BookDetails):
             else:
                 books = Book.tagged.with_all(tags)
         else:
-            books = Book.objects.all()
+            books = books if books is not None else Book.objects.all()
+        books = order_books(books, new_api)
 
         if top_level:
             books = books.filter(parent=None)
@@ -208,11 +226,25 @@ class AnonymousBooksHandler(AnonymousBaseHandler, BookDetails):
             books = books.filter(media__type='mp3').distinct()
         if daisy:
             books = books.filter(media__type='daisy').distinct()
+        if recommended:
+            books = books.filter(recommended=True)
+        if newest:
+            books = books.order_by('-created_at')
+
+        if after:
+            books = books_after(books, after, new_api)
 
-        if books.exists():
-            return books
+        if new_api:
+            books = books.only('slug', 'title', 'cover', 'cover_thumb', 'sort_key', 'sort_key_author')
         else:
-            return rc.NOT_FOUND
+            books = books.only('slug', 'title', 'cover', 'cover_thumb')
+        for category in book_tag_categories:
+            books = prefetch_relations(books, category)
+
+        if count:
+            books = books[:count]
+
+        return books
 
     def create(self, request, *args, **kwargs):
         return rc.FORBIDDEN
@@ -221,9 +253,23 @@ class AnonymousBooksHandler(AnonymousBaseHandler, BookDetails):
 class BooksHandler(BookDetailHandler):
     allowed_methods = ('GET', 'POST')
     model = Book
-    fields = book_tag_categories + ['href', 'title', 'url', 'cover', 'cover_thumb']
+    fields = book_list_fields + ['liked']
     anonymous = AnonymousBooksHandler
 
+    # hack, because piston is stupid
+    @classmethod
+    def liked(cls, book):
+        return getattr(book, 'liked', None)
+
+    def read(self, request, **kwargs):
+        books = AnonymousBooksHandler().read(request, **kwargs)
+        likes = set(Book.tagged.with_any(request.user.tag_set.all()).values_list('id', flat=True))
+
+        new_books = [
+            BookProxy(book).set('liked', book.id in likes)
+            for book in books]
+        return QuerySetProxy(new_books)
+
     def create(self, request, *args, **kwargs):
         if not request.user.has_perm('catalogue.add_book'):
             return rc.FORBIDDEN
@@ -238,217 +284,167 @@ class BooksHandler(BookDetailHandler):
 
 
 class EBooksHandler(AnonymousBooksHandler):
-    fields = ('author', 'href', 'title', 'cover') + tuple(Book.ebook_formats)
+    fields = ('author', 'href', 'title', 'cover') + tuple(Book.ebook_formats) + ('slug',)
 
 
-# add categorized tags fields for Book
-def _tags_getter(category):
-    @classmethod
-    def get_tags(cls, book):
-        return book.tags.filter(category=category)
-    return get_tags
-def _tag_getter(category):
-    @classmethod
-    def get_tag(cls, book):
-        return ', '.join(tag.name for tag in book.tags.filter(category=category))
-    return get_tag
-for plural, singular in category_singular.items():
-    setattr(BookDetails, plural, _tags_getter(singular))
-    setattr(BookDetails, singular, _tag_getter(singular))
+class BookProxy(models.Model):
+    class Meta:
+        managed = False
 
-# add fields for files in Book
-def _file_getter(format):
-    field = "%s_file" % format
-    @classmethod
-    def get_file(cls, book):
-        f = getattr(book, field)
-        if f:
-            return MEDIA_BASE + f.url
-        else:
-            return ''
-    return get_file
-for format in Book.formats:
-    setattr(BookDetails, format, _file_getter(format))
+    def __init__(self, book, key=None):
+        self.book = book
+        self.key = key
 
+    def set(self, attr, value):
+        self.__setattr__(attr, value)
+        return self
 
-class CollectionDetails(object):
-    """Custom Collection fields."""
+    def __getattr__(self, item):
+        return self.book.__getattribute__(item)
 
-    @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 QuerySetProxy(models.QuerySet):
+    def __init__(self, l):
+        self.list = l
 
+    def __iter__(self):
+        return iter(self.list)
 
 
-class CollectionDetailHandler(BaseHandler, CollectionDetails):
-    allowed_methods = ('GET',)
-    fields = ['url', 'title', 'description', 'books']
-
-    @piwik_track
-    def read(self, request, slug):
-        """ Returns details of a collection, identified by slug. """
-        try:
-            return Collection.objects.get(slug=slug)
-        except Collection.DoesNotExist:
-            return rc.NOT_FOUND
+class AnonFilterBooksHandler(AnonymousBooksHandler):
+    fields = book_list_fields + ['key']
 
+    def parse_bool(self, s):
+        if s in ('true', 'false'):
+            return s == 'true'
+        else:
+            return None
 
-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. """
-
-    fields = ['name', 'url', 'sort_key', 'description']
-
-    @piwik_track
-    def read(self, request, category, slug):
-        """ Returns details of a tag, identified by category and slug. """
-
-        try:
-            category_sng = category_singular[category]
-        except KeyError, e:
-            return rc.NOT_FOUND
-
-        try:
-            return Tag.objects.get(category=category_sng, slug=slug)
-        except Tag.DoesNotExist:
-            return rc.NOT_FOUND
-
-
-class TagsHandler(BaseHandler, TagDetails):
-    """ Main handler for Tag objects.
-
-    Responsible for lists of Tag objects
-    and fields used for representing Tags.
-
-    """
-    allowed_methods = ('GET',)
-    model = Tag
-    fields = ['name', 'href', 'url']
-
-    @piwik_track
-    def read(self, request, category=None, pk=None):
-        """ Lists all tags in the category (eg. all themes). """
-        if pk is not None:
-            try:
-                return Tag.objects.exclude(category='set').get(pk=pk)
-            except Book.DoesNotExist:
-                return rc.NOT_FOUND
-
-        try:
-            category_sng = category_singular[category]
-        except KeyError, e:
-            return rc.NOT_FOUND
-
-        tags = Tag.objects.filter(category=category_sng).exclude(items=None)
-        if tags.exists():
-            return tags
+        key_sep = '$'
+        search_string = request.GET.get('search')
+        is_lektura = self.parse_bool(request.GET.get('lektura'))
+        is_audiobook = self.parse_bool(request.GET.get('audiobook'))
+        preview = self.parse_bool(request.GET.get('preview'))
+
+        new_api = request.GET.get('new_api')
+        after = request.GET.get('after')
+        count = int(request.GET.get('count', 50))
+        books = order_books(Book.objects.distinct(), new_api)
+        if is_lektura is not None:
+            books = books.filter(has_audience=is_lektura)
+        if is_audiobook is not None:
+            if is_audiobook:
+                books = books.filter(media__type='mp3')
+            else:
+                books = books.exclude(media__type='mp3')
+        if preview is not None:
+            books = books.filter(preview=preview)
+        for key in request.GET:
+            if key in category_singular:
+                category = category_singular[key]
+                if category in book_tag_categories:
+                    slugs = request.GET[key].split(',')
+                    tags = Tag.objects.filter(category=category, slug__in=slugs)
+                    books = Book.tagged.with_any(tags, books)
+        if (search_string is not None) and len(search_string) < 3:
+            search_string = None
+        if search_string:
+            search_string = re_escape(search_string)
+            books_author = books.filter(cached_author__iregex='\m' + search_string)
+            books_title = books.filter(title__iregex='\m' + search_string)
+            books_title = books_title.exclude(id__in=list(books_author.values_list('id', flat=True)))
+            if after and (key_sep in after):
+                which, key = after.split(key_sep, 1)
+                if which == 'title':
+                    book_lists = [(books_after(books_title, key, new_api), 'title')]
+                else:  # which == 'author'
+                    book_lists = [(books_after(books_author, key, new_api), 'author'), (books_title, 'title')]
+            else:
+                book_lists = [(books_author, 'author'), (books_title, 'title')]
         else:
-            return rc.NOT_FOUND
-
-
-class FragmentDetails(object):
-    """Custom Fragment fields."""
-
+            if after and key_sep in after:
+                which, key = after.split(key_sep, 1)
+                books = books_after(books, key, new_api)
+            book_lists = [(books, 'book')]
+
+        filtered_books = []
+        for book_list, label in book_lists:
+            book_list = book_list.only('slug', 'title', 'cover', 'cover_thumb', 'sort_key_author', 'sort_key')
+            for category in book_tag_categories:
+                book_list = prefetch_relations(book_list, category)
+            remaining_count = count - len(filtered_books)
+            new_books = [
+                BookProxy(book, '%s%s%s' % (
+                    label, key_sep, book.slug if not new_api else book.full_sort_key()))
+                for book in book_list[:remaining_count]]
+            filtered_books += new_books
+            if len(filtered_books) == count:
+                break
+
+        return QuerySetProxy(filtered_books)
+
+
+class FilterBooksHandler(BooksHandler):
+    anonymous = AnonFilterBooksHandler
+    fields = book_list_fields + ['key', 'liked']
+
+    # hack, because piston is stupid
     @classmethod
-    def href(cls, fragment):
-        """ Returns URI in the API for the fragment. """
+    def liked(cls, book):
+        return getattr(book, 'liked', None)
 
-        return API_BASE + reverse("api_fragment",
-            args=[fragment.book.slug, fragment.anchor])
+    def read(self, request):
+        qsp = AnonFilterBooksHandler().read(request)
+        likes = set(Book.tagged.with_any(request.user.tag_set.all()).values_list('id', flat=True))
+        for book in qsp.list:
+            book.set('liked', book.id in likes)
+        return qsp
 
+
+# add categorized tags fields for Book
+def _tags_getter(category):
     @classmethod
-    def url(cls, fragment):
-        """ Returns URL on the site for the fragment. """
+    def get_tags(cls, book):
+        return book.tags.filter(category=category)
+    return get_tags
 
-        return WL_BASE + fragment.get_absolute_url()
 
+def _tag_getter(category):
     @classmethod
-    def themes(cls, fragment):
-        """ Returns a list of theme tags for the fragment. """
+    def get_tag(cls, book):
+        return book.tag_unicode(category)
+    return get_tag
 
-        return fragment.tags.filter(category='theme')
 
+def add_tag_getters():
+    for plural, singular in category_singular.items():
+        setattr(BookDetails, plural, _tags_getter(singular))
+        setattr(BookDetails, singular, _tag_getter(singular))
 
-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. """
-        try:
-            return Fragment.objects.get(book__slug=book, anchor=anchor)
-        except Fragment.DoesNotExist:
-            return rc.NOT_FOUND
+add_tag_getters()
 
 
-class FragmentsHandler(BaseHandler, FragmentDetails):
-    """ Main handler for Fragments.
+# add fields for files in Book
+def _file_getter(book_format):
 
-    Responsible for lists of Fragment objects
-    and fields used for representing Fragments.
+    @staticmethod
+    def get_file(book):
+        f_url = book.media_url(book_format)
+        if f_url:
+            return MEDIA_BASE + f_url
+        else:
+            return ''
+    return get_file
 
-    """
-    model = Fragment
-    fields = ['book', 'url', 'anchor', 'href']
-    allowed_methods = ('GET',)
 
-    categories = set(['author', 'epoch', 'kind', 'genre', 'book', 'theme'])
+def add_file_getters():
+    for book_format in Book.formats:
+        setattr(BookDetails, book_format, _file_getter(book_format))
 
-    @piwik_track
-    def read(self, request, tags):
-        """ Lists all fragments with given book, tags, themes.
 
-        :param tags: should be a path of categories and slugs, i.e.:
-             books/book-slug/authors/an-author/themes/a-theme/
-
-        """
-        try:
-            tags, ancestors = 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
+add_file_getters()
 
 
 class PictureHandler(BaseHandler):
@@ -467,3 +463,40 @@ class PictureHandler(BaseHandler):
             return rc.CREATED
         else:
             return rc.NOT_FOUND
+
+
+class BlogEntryHandler(BaseHandler):
+    model = Entry
+    fields = (
+        'title', 'lead', 'body', 'place', 'time', 'image_url', 'image_thumb', 'gallery_urls', 'type', 'key', 'url')
+
+    def read(self, request):
+        after = request.GET.get('after')
+        count = int(request.GET.get('count', 20))
+        entries = Entry.published_objects.filter(in_stream=True).order_by('-first_published_at')
+        if after:
+            entries = entries.filter(first_published_at__lt=after)
+        if count:
+            entries = entries[:count]
+        return entries
+
+    @classmethod
+    def image_url(cls, entry):
+        return (WL_BASE + entry.image.url) if entry.image else None
+
+    @classmethod
+    def image_thumb(cls, entry):
+        return MEDIA_BASE + default.backend.get_thumbnail(
+            entry.image, "193x193").url if entry.image else ''
+
+    @classmethod
+    def gallery_urls(cls, entry):
+        return [WL_BASE + photo.url() for photo in entry.photo_set.all()]
+
+    @classmethod
+    def key(cls, entry):
+        return entry.first_published_at
+
+    @classmethod
+    def url(cls, entry):
+        return WL_BASE + entry.get_absolute_url()