X-Git-Url: https://git.mdrn.pl/wolnelektury.git/blobdiff_plain/6d42bc478e3d1bd90eb294464748c21e4de0fc63..94ca8037f9a5891b7ded1c92c639e0fbc676e67b:/src/catalogue/fields.py diff --git a/src/catalogue/fields.py b/src/catalogue/fields.py index 46cde2379..d88787e63 100644 --- a/src/catalogue/fields.py +++ b/src/catalogue/fields.py @@ -7,7 +7,7 @@ from django.core.files.storage import FileSystemStorage from django.db import models from django.db.models.fields.files import FieldFile from catalogue import app_settings -from catalogue.constants import LANGUAGES_3TO2 +from catalogue.constants import LANGUAGES_3TO2, EBOOK_FORMATS_WITH_CHILDREN, EBOOK_FORMATS_WITHOUT_CHILDREN from catalogue.utils import remove_zip, truncate_html_words, gallery_path, gallery_url from celery.task import Task, task from celery.utils.log import get_task_logger @@ -15,6 +15,10 @@ from waiter.utils import clear_cache task_logger = get_task_logger(__name__) +ETAG_SCHEDULED_SUFFIX = '-scheduled' +EBOOK_BUILD_PRIORITY = 0 +EBOOK_REBUILD_PRIORITY = 9 + class EbookFieldFile(FieldFile): """Represents contents of an ebook file field.""" @@ -23,9 +27,15 @@ class EbookFieldFile(FieldFile): """Build the ebook immediately.""" return self.field.builder.build(self) - def build_delay(self): + def build_delay(self, priority=EBOOK_BUILD_PRIORITY): """Builds the ebook in a delayed task.""" - return self.field.builder.delay(self.instance, self.field.attname) + self.update_etag( + "".join([self.field.get_current_etag(), ETAG_SCHEDULED_SUFFIX]) + ) + return self.field.builder.apply_async( + [self.instance, self.field.attname], + priority=priority + ) def get_url(self): return self.instance.media_url(self.field.attname.split('_')[0]) @@ -35,10 +45,16 @@ class EbookFieldFile(FieldFile): permissions = 0o644 if readable else 0o600 os.chmod(self.path, permissions) + def update_etag(self, etag): + setattr(self.instance, self.field.etag_field_name, etag) + if self.instance.pk: + self.instance.save(update_fields=[self.field.etag_field_name]) + class EbookField(models.FileField): """Represents an ebook file field, attachable to a model.""" attr_class = EbookFieldFile + registry = [] def __init__(self, format_name, *args, **kwargs): super(EbookField, self).__init__(*args, **kwargs) @@ -57,14 +73,54 @@ class EbookField(models.FileField): def contribute_to_class(self, cls, name): super(EbookField, self).contribute_to_class(cls, name) + self.etag_field_name = f'{name}_etag' + def has(model_instance): return bool(getattr(model_instance, self.attname, None)) has.__doc__ = None has.__name__ = str("has_%s" % self.attname) has.short_description = self.name has.boolean = True + + self.registry.append(self) + setattr(cls, 'has_%s' % self.attname, has) + def get_current_etag(self): + import pkg_resources + librarian_version = pkg_resources.get_distribution("librarian").version + return librarian_version + + def schedule_stale(self, queryset=None): + """Schedule building this format for all the books where etag is stale.""" + # If there is not ETag field, bail. That's true for xml file field. + if not hasattr(self.model, f'{self.attname}_etag'): + return + + etag = self.get_current_etag() + if queryset is None: + queryset = self.model.objects.all() + + if self.format_name in EBOOK_FORMATS_WITHOUT_CHILDREN + ['html']: + queryset = queryset.filter(children=None) + + queryset = queryset.exclude(**{ + f'{self.etag_field_name}__in': [ + etag, f'{etag}{ETAG_SCHEDULED_SUFFIX}' + ] + }) + for obj in queryset: + fieldfile = getattr(obj, self.attname) + priority = EBOOK_REBUILD_PRIORITY if fieldfile else EBOOK_BUILD_PRIORITY + fieldfile.build_delay(priority=priority) + + @classmethod + def schedule_all_stale(cls): + """Schedules all stale ebooks of all formats to rebuild.""" + for field in cls.registry: + field.schedule_stale() + + class BuildEbook(Task): formats = {} @@ -93,8 +149,13 @@ class BuildEbook(Task): def run(self, obj, field_name): """Just run `build` on FieldFile, can't pass it directly to Celery.""" - task_logger.info("%s -> %s" % (obj.slug, field_name)) + fieldfile = getattr(obj, field_name) + + # Get etag value before actually building the file. + etag = fieldfile.field.get_current_etag() + task_logger.info("%s -> %s@%s" % (obj.slug, field_name, etag)) ret = self.build(getattr(obj, field_name)) + fieldfile.update_etag(etag) obj.clear_cache() return ret @@ -133,8 +194,9 @@ class BuildTxt(BuildEbook): class BuildPdf(BuildEbook): @staticmethod def transform(wldoc, fieldfile): - return wldoc.as_pdf(morefloats=settings.LIBRARIAN_PDF_MOREFLOATS, cover=True, - ilustr_path=gallery_path(wldoc.book_info.url.slug), customizations=['notoc']) + return wldoc.as_pdf( + morefloats=settings.LIBRARIAN_PDF_MOREFLOATS, cover=True, + ilustr_path=gallery_path(wldoc.book_info.url.slug), customizations=['notoc']) def build(self, fieldfile): BuildEbook.build(self, fieldfile) @@ -203,8 +265,9 @@ class BuildHtml(BuildEbook): if lang == settings.LANGUAGE_CODE: # Allow creating themes if book in default language. tag, created = Tag.objects.get_or_create( - slug=slugify(theme_name), - category='theme') + slug=slugify(theme_name), + category='theme' + ) if created: tag.name = theme_name setattr(tag, "name_%s" % lang, theme_name) @@ -215,7 +278,10 @@ class BuildHtml(BuildEbook): elif lang is not None: # Don't create unknown themes in non-default languages. try: - tag = Tag.objects.get(category='theme', **{"name_%s" % lang: theme_name}) + tag = Tag.objects.get( + category='theme', + **{"name_%s" % lang: theme_name} + ) except Tag.DoesNotExist: pass else: @@ -227,7 +293,12 @@ class BuildHtml(BuildEbook): short_text = truncate_html_words(text, 15) if text == short_text: short_text = '' - new_fragment = Fragment.objects.create(anchor=fragment.id, book=book, text=text, short_text=short_text) + new_fragment = Fragment.objects.create( + anchor=fragment.id, + book=book, + text=text, + short_text=short_text + ) new_fragment.save() new_fragment.tags = set(meta_tags + themes) @@ -283,6 +354,15 @@ class BuildSimpleCover(BuildCover): return WLNoBoxCover(wldoc.book_info, height=1000).output_file() +@BuildEbook.register('cover_ebookpoint') +@task(ignore_result=True) +class BuildCoverEbookpoint(BuildCover): + @classmethod + def transform(cls, wldoc, fieldfile): + from librarian.cover import EbookpointCover + return EbookpointCover(wldoc.book_info).output_file() + + # not used, but needed for migrations class OverwritingFieldFile(FieldFile): """