X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/fa5a185ce54eb7bacaadc34f05abb63e701d39d8..e78ad9088340bcceb6634334ce0941f571a67440:/apps/api/handlers.py diff --git a/apps/api/handlers.py b/apps/api/handlers.py index cca504f8f..706e0cdac 100644 --- a/apps/api/handlers.py +++ b/apps/api/handlers.py @@ -2,42 +2,16 @@ # 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 -from django.shortcuts import get_object_or_404 -from django.contrib.auth.decorators import login_required, user_passes_test -from django.utils import simplejson as json +from datetime import datetime, timedelta from piston.handler import BaseHandler -from piston.utils import rc, validate +from django.conf import settings -from api.models import Deleted from api.helpers import timestamp +from api.models import Deleted from catalogue.models import Book, Tag -from catalogue.forms import BookImportForm -from catalogue.views import tagged_object_list -""" -class TagHandler(BaseHandler): - allowed_methods = ('GET',) - model = Tag - - def read(self, request, tags=''): - if tags == '': - return Tag.objects.all() - else: - return tagged_object_list(request, tags, api=True) - -class BookHandler(BaseHandler): - model = Book - #fields = ('slug', 'title') - - def read(self, request, slug=None): - if slug: - return get_object_or_404(Book, slug=slug) - else: - return Book.objects.all() -""" -class WLHandler(BaseHandler): +class CatalogueHandler(BaseHandler): @staticmethod def fields(request, name): @@ -45,164 +19,237 @@ class WLHandler(BaseHandler): return fields_str.split(',') if fields_str is not None else None @staticmethod - def book_dict(book, fields=None, extra_fields=None): + def until(t=None): + """ Returns time suitable for use as upper time boundary for check. + + Defaults to 'five minutes ago' to avoid issues with time between + change stamp set and model save. + Cuts the microsecond part to avoid issues with DBs where time has + more precision. + + """ + # set to five minutes ago, to avoid concurrency issues + if t is None: + t = datetime.now() - 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', + 'xml', 'epub', 'txt', 'pdf', 'html', + 'mp3', 'ogg', 'daisy', + '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.get_extra_info_value() + obj = {} - for field in ('slug', 'title', 'description', - 'extra_info', 'gazeta_link', 'wiki_link'): - if getattr(book, field): - obj[field] = getattr(book, field) - for field in ('created_at', 'changed_at'): - obj[field] = timestamp(getattr(book, field)) - for field in ('xml', 'epub', 'txt', 'pdf', 'html'): - f = getattr(book, field+'_file') - if f: - obj[field] = f.url - for media in book.medias.all(): - obj.setdefault(media.type, []).append(media.file.url) - if book.parent: - obj['parent'] = book.parent.id - obj['parent_number'] = book.parent_number - if fields is not None: - for key in obj.keys(): - if key not in fields: - del obj[key] - - # if there's still extra_info, we can parse it - if 'extra_info' in obj: - extra = json.loads(obj['extra_info']) - if extra_fields is not None: - for key in extra.keys(): - if key not in extra_fields: - del extra[key] - obj['extra_info'] = extra + for field in fields: + + if field in ('xml', 'epub', 'txt', 'pdf', 'html'): + f = getattr(book, field+'_file') + if f: + obj[field] = { + 'url': f.url, + 'size': f.size, + } + + elif field in ('mp3', 'ogg', 'daisy'): + media = [] + for m in book.media.filter(type=field): + 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__in=('book', 'set'))] + + elif field == 'author': + obj[field] = ", ".join(t.name for t in book.tags.filter(category='author')) + + 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, since=0, request=None): - since = datetime.fromtimestamp(float(since)) - book_fields = cls.fields(request, 'book_fields') - extra_fields = cls.fields(request, 'extra_fields') + def book_changes(cls, request=None, since=0, until=None, fields=None): + since = datetime.fromtimestamp(int(since)) + until = cls.until(until) + + changes = { + 'time_checked': timestamp(until) + } + + if not fields: + fields = cls.fields(request, 'book_fields') added = [] - changed = [] + updated = [] deleted = [] last_change = since - for book in Book.objects.filter(changed_at__gt=since): - if book.changed_at > last_change: - last_change = book.changed_at - book_d = cls.book_dict(book, book_fields, extra_fields) - if book.created_at > since: - added.append(book_d) - else: - changed.append(book_d) - - for book in Deleted.objects.filter(type='Book', deleted_at__gt=since, created_at__lte=since): - if book.deleted_at > last_change: - last_change = book.deleted_at + for book in Book.objects.filter(changed_at__gte=since, + changed_at__lt=until): + 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): deleted.append(book.id) - return {'added': added, 'changed': changed, 'deleted': deleted, 'last_change': timestamp(last_change)} + 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 ('name', 'slug', 'sort_key', 'category', 'description', 'main_page', #'created_at', 'changed_at', - 'gazeta_link', 'wiki_link'): - if getattr(tag, field): - obj[field] = getattr(tag, field) - if fields is not None: - for key in obj.keys(): - if key not in fields: - del obj[key] + 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])] + + 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, since=0, request=None): - since = datetime.fromtimestamp(float(since)) - tag_fields = cls.fields(request, 'tag_fields') + def tag_changes(cls, request=None, since=0, until=None, fields=None, categories=None): + since = datetime.fromtimestamp(int(since)) + until = cls.until(until) - added = [] - changed = [] - deleted = [] + changes = { + 'time_checked': timestamp(until) + } - last_change = since - for tag in Tag.objects.filter(changed_at__gt=since): - if tag.changed_at > last_change: - last_change = tag.changed_at - tag_d = cls.tag_dict(tag, tag_fields) - if tag.created_at > since: - added.append(tag_d) - else: - changed.append(tag_d) + if not fields: + fields = cls.fields(request, 'tag_fields') + if not categories: + categories = cls.fields(request, 'tag_categories') - for tag in Deleted.objects.filter(type='Tag', deleted_at__gt=since, created_at__lte=since): - if tag.deleted_at > last_change: - last_change = tag.deleted_at - deleted.append(tag.id) - return {'added': added, 'changed': changed, 'deleted': deleted, 'last_change': timestamp(last_change)} + 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 = [] -class BookChangesHandler(WLHandler): - allowed_methods = ('GET',) + for tag in Tag.objects.filter(category__in=categories, + changed_at__gte=since, + changed_at__lt=until): + # only serve non-empty tags + if tag.get_count(): + tag_d = cls.tag_dict(tag, fields) + updated.append(tag_d) + elif tag.created_at < since: + 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): + deleted.append(tag.id) + if deleted: + changes['deleted'] = deleted - def read(self, request, since): - return self.book_changes(since, request) + 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) -class TagChangesHandler(WLHandler): - allowed_methods = ('GET',) + changes = { + 'time_checked': timestamp(until) + } - def read(self, request, since): - return self.tag_changes(since, request) + 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] + return changes -class ChangesHandler(WLHandler): + +class BookChangesHandler(CatalogueHandler): allowed_methods = ('GET',) def read(self, request, since): - changes = { - 'books': self.book_changes(since, request), - 'tags': self.tag_changes(since, request), - } + return self.book_changes(request, since) - last_change = 0 - changes_rev = {} - for model in changes: - for field in changes[model]: - if field == 'last_change': - if changes[model][field] > last_change: - last_change = changes[model][field] - else: - changes_rev.setdefault(field, {})[model] = changes[model][field] - changes_rev['last_change'] = last_change - return changes_rev +class TagChangesHandler(CatalogueHandler): + allowed_methods = ('GET',) + def read(self, request, since): + return self.tag_changes(request, since) -# old -""" -staff_required = user_passes_test(lambda user: user.is_staff) -class BookHandler(BaseHandler): - model = Book - fields = ('slug', 'title') +class ChangesHandler(CatalogueHandler): + allowed_methods = ('GET',) - @staff_required - def read(self, request, slug=None): - if slug: - return get_object_or_404(Book, slug=slug) - else: - return Book.objects.all() - - @staff_required - def create(self, request): - form = BookImportForm(request.POST, request.FILES) - if form.is_valid(): - form.save() - return rc.CREATED - else: - return rc.BAD_REQUEST -""" + def read(self, request, since): + return self.changes(request, since)