X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/dfd584e3b136d770bf56569030d10712a8722569..013ec8a416d4ff1ea3e1f2fa9ee2935623197ecd:/apps/api/handlers.py diff --git a/apps/api/handlers.py b/apps/api/handlers.py index a3a5ce599..5fe931e69 100644 --- a/apps/api/handlers.py +++ b/apps/api/handlers.py @@ -2,29 +2,24 @@ # This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later. # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information. # -from datetime import datetime, timedelta 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 django.utils.functional import lazy -from django.utils.timezone import utc from piston.handler import AnonymousBaseHandler, BaseHandler from piston.utils import rc from sorl.thumbnail import default -from api.helpers import timestamp -from api.models import Deleted 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 wolnelektury.utils import tz from stats.utils import piwik_track +from . import emitters # Register our emitters + API_BASE = WL_BASE = MEDIA_BASE = lazy( lambda: u'http://' + Site.objects.get_current().domain, unicode)() @@ -71,7 +66,10 @@ def read_tags(tags, allowed): raise ValueError('Category not allowed.') if category == 'book': - books.append(Book.objects.get(slug=slug)) + 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)) @@ -174,8 +172,8 @@ class AnonymousBooksHandler(AnonymousBaseHandler, BookDetails): return book.tags.filter(category='genre') @piwik_track - def read(self, request, tags, top_level=False, - audiobooks=False, daisy=False): + def read(self, request, tags=None, top_level=False, + audiobooks=False, daisy=False, pk=None): """ Lists all books with given tags. :param tags: filtering tags; should be a path of categories @@ -184,8 +182,14 @@ class AnonymousBooksHandler(AnonymousBaseHandler, BookDetails): it's children are aren't. By default all books matching the tags are returned. """ + if pk is not None: + 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, allowed=book_tag_categories) except ValueError: return rc.NOT_FOUND @@ -360,8 +364,13 @@ class TagsHandler(BaseHandler, TagDetails): fields = ['name', 'href', 'url'] @piwik_track - def read(self, request, category): + 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] @@ -442,274 +451,6 @@ class FragmentsHandler(BaseHandler, FragmentDetails): return rc.NOT_FOUND - -# Changes handlers - -class CatalogueHandler(BaseHandler): - - @staticmethod - def fields(request, name): - fields_str = request.GET.get(name) if request is not None else None - return fields_str.split(',') if fields_str is not None else None - - @staticmethod - def until(t=None): - """ Returns time suitable for use as upper time boundary for check. - - Used to avoid issues with time between setting the change stamp - and actually saving the model in database. - Cuts the microsecond part to avoid issues with DBs where time has - more precision. - - :param datetime t: manually sets the upper boundary - - """ - # set to five minutes ago, to avoid concurrency issues - if t is None: - t = datetime.utcnow().replace(tzinfo=utc) - timedelta(seconds=settings.API_WAIT) - # set to whole second in case DB supports something smaller - return t.replace(microsecond=0) - - @staticmethod - def book_dict(book, fields=None): - all_fields = ['url', 'title', 'description', - 'gazeta_link', 'wiki_link', - ] + Book.formats + BookMedia.formats.keys() + [ - '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 - - extra_info = book.extra_info - - obj = {} - for field in fields: - - if field in Book.formats: - f = getattr(book, field+'_file') - if f: - obj[field] = { - 'url': f.url, - 'size': f.size, - } - - elif field in BookMedia.formats: - media = [] - for m in book.media.filter(type=field).iterator(): - media.append({ - 'url': m.file.url, - 'size': m.file.size, - }) - if media: - obj[field] = media - - elif field == 'url': - obj[field] = book.get_absolute_url() - - elif field == 'tags': - obj[field] = [t.id for t in book.tags.exclude(category='set').iterator()] - - elif field == '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 in ('license', 'license_description', 'source_name', - 'technical_editors', 'editors'): - f = extra_info.get(field) - if f: - obj[field] = f - - else: - f = getattr(book, field) - if f: - obj[field] = f - - obj['id'] = book.id - return obj - - @classmethod - def book_changes(cls, request=None, since=0, until=None, fields=None): - since = datetime.fromtimestamp(int(since), tz) - until = cls.until(until) - - changes = { - 'time_checked': timestamp(until) - } - - if not fields: - fields = cls.fields(request, 'book_fields') - - added = [] - updated = [] - deleted = [] - - last_change = since - for book in Book.objects.filter(changed_at__gte=since, - changed_at__lt=until).iterator(): - book_d = cls.book_dict(book, fields) - updated.append(book_d) - if updated: - changes['updated'] = updated - - for book in Deleted.objects.filter(content_type=Book, - deleted_at__gte=since, - deleted_at__lt=until, - created_at__lt=since).iterator(): - deleted.append(book.id) - if deleted: - changes['deleted'] = deleted - - return changes - - @staticmethod - def tag_dict(tag, fields=None): - all_fields = ('name', 'category', 'sort_key', 'description', - 'gazeta_link', 'wiki_link', - 'url', 'books', - ) - - if fields: - fields = (f for f in fields if f in all_fields) - else: - fields = all_fields - - obj = {} - for field in fields: - - if field == 'url': - obj[field] = tag.get_absolute_url() - - elif field == 'books': - obj[field] = [b.id for b in Book.tagged_top_level([tag]).iterator()] - - elif field == 'sort_key': - obj[field] = tag.sort_key - - else: - f = getattr(tag, field) - if f: - obj[field] = f - - obj['id'] = tag.id - return obj - - @classmethod - def tag_changes(cls, request=None, since=0, until=None, fields=None, categories=None): - since = datetime.fromtimestamp(int(since), tz) - until = cls.until(until) - - changes = { - 'time_checked': timestamp(until) - } - - if not fields: - fields = cls.fields(request, 'tag_fields') - if not categories: - categories = cls.fields(request, 'tag_categories') - - all_categories = ('author', 'epoch', 'kind', 'genre') - if categories: - categories = (c for c in categories if c in all_categories) - else: - categories = all_categories - - updated = [] - deleted = [] - - for tag in Tag.objects.filter(category__in=categories, - changed_at__gte=since, - changed_at__lt=until - ).exclude(items=None).iterator(): - tag_d = cls.tag_dict(tag, fields) - updated.append(tag_d) - for tag in Tag.objects.filter(category__in=categories, - created_at__lt=since, - changed_at__gte=since, - changed_at__lt=until, - items=None).iterator(): - deleted.append(tag.id) - if updated: - changes['updated'] = updated - - for tag in Deleted.objects.filter(category__in=categories, - content_type=Tag, - deleted_at__gte=since, - deleted_at__lt=until, - created_at__lt=since).iterator(): - deleted.append(tag.id) - if deleted: - changes['deleted'] = deleted - - return changes - - @classmethod - 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_by_type = { - 'books': cls.book_changes(request, since, until, book_fields), - 'tags': cls.tag_changes(request, since, until, tag_fields, tag_categories), - } - - for model in changes_by_type: - for field in changes_by_type[model]: - 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',) - - @piwik_track - def read(self, request, since): - return self.book_changes(request, since) - - -class TagChangesHandler(CatalogueHandler): - allowed_methods = ('GET',) - - @piwik_track - def read(self, request, since): - return self.tag_changes(request, since) - - -class ChangesHandler(CatalogueHandler): - allowed_methods = ('GET',) - - @piwik_track - def read(self, request, since): - return self.changes(request, since) - - class PictureHandler(BaseHandler): model = Picture fields = ('slug', 'title')