import os
from django.conf import settings
from django.core.files import File
-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 django.utils.deconstruct import deconstructible
+from django.utils.translation import gettext_lazy as _
from catalogue.constants import LANGUAGES_3TO2, EBOOK_FORMATS_WITH_CHILDREN, EBOOK_FORMATS_WITHOUT_CHILDREN
from catalogue.utils import absolute_url, remove_zip, truncate_html_words, gallery_path, gallery_url
-from celery import Task, shared_task
-from celery.utils.log import get_task_logger
from waiter.utils import clear_cache
-task_logger = get_task_logger(__name__)
-
ETAG_SCHEDULED_SUFFIX = '-scheduled'
EBOOK_BUILD_PRIORITY = 0
EBOOK_REBUILD_PRIORITY = 9
+@deconstructible
+class UploadToPath(object):
+ def __init__(self, path):
+ self.path = path
+
+ def __call__(self, instance, filename):
+ return self.path % instance.slug
+
+ def __eq__(self, other):
+ return isinstance(other, type(self)) and other.path == self.path
+
+
class EbookFieldFile(FieldFile):
"""Represents contents of an ebook file field."""
def build(self):
"""Build the ebook immediately."""
- return self.field.builder.build(self)
+ etag = self.field.get_current_etag()
+ self.field.build(self)
+ self.update_etag(etag)
+ self.instance.clear_cache()
def build_delay(self, priority=EBOOK_BUILD_PRIORITY):
"""Builds the ebook in a delayed task."""
+ from .tasks import build_field
+
self.update_etag(
"".join([self.field.get_current_etag(), ETAG_SCHEDULED_SUFFIX])
)
- return self.field.builder.apply_async(
- [self.instance, self.field.attname],
+ return build_field.apply_async(
+ [self.instance.pk, self.field.attname],
priority=priority
)
- def get_url(self):
- return self.instance.media_url(self.field.attname.split('_')[0])
-
def set_readable(self, readable):
import os
permissions = 0o644 if readable else 0o600
class EbookField(models.FileField):
"""Represents an ebook file field, attachable to a model."""
attr_class = EbookFieldFile
- registry = []
+ ext = None
+ librarian2_api = False
+ ZIP = None
+
+ def __init__(self, verbose_name=None, with_etag=True, etag_field_name=None, **kwargs):
+ kwargs.setdefault('verbose_name', verbose_name)
+ self.with_etag = with_etag
+ self.etag_field_name = etag_field_name
+ kwargs.setdefault('max_length', 255)
+ kwargs.setdefault('blank', True)
+ kwargs.setdefault('default', '')
+ kwargs.setdefault('upload_to', self.get_upload_to(self.ext))
- def __init__(self, format_name, *args, **kwargs):
- super(EbookField, self).__init__(*args, **kwargs)
- self.format_name = format_name
+ super().__init__(**kwargs)
def deconstruct(self):
- name, path, args, kwargs = super(EbookField, self).deconstruct()
- args.insert(0, self.format_name)
+ name, path, args, kwargs = super().deconstruct()
+ if kwargs.get('max_length') == 255:
+ del kwargs['max_length']
+ if kwargs.get('blank') is True:
+ del kwargs['blank']
+ if kwargs.get('default') == '':
+ del kwargs['default']
+ if self.get_upload_to(self.ext) == kwargs.get('upload_to'):
+ del kwargs['upload_to']
+ # with_etag creates a second field, which then deconstructs to manage
+ # its own migrations. So for migrations, etag_field_name is explicitly
+ # set to avoid double creation of the etag field.
+ if self.with_etag:
+ kwargs['etag_field_name'] = self.etag_field_name
+ else:
+ kwargs['with_etag'] = self.with_etag
+
return name, path, args, kwargs
- @property
- def builder(self):
- """Finds a celery task suitable for the format of the field."""
- return BuildEbook.for_format(self.format_name)
+ @classmethod
+ def get_upload_to(cls, directory):
+ directory = getattr(cls, 'directory', cls.ext)
+ upload_template = f'book/{directory}/%s.{cls.ext}'
+ return UploadToPath(upload_template)
def contribute_to_class(self, cls, name):
super(EbookField, self).contribute_to_class(cls, name)
- self.etag_field_name = f'{name}_etag'
+ if self.with_etag and not self.etag_field_name:
+ self.etag_field_name = f'{name}_etag'
+ self.etag_field = models.CharField(max_length=255, editable=False, default='', db_index=True)
+ self.etag_field.contribute_to_class(cls, f'{name}_etag')
def has(model_instance):
return bool(getattr(model_instance, self.attname, None))
has.short_description = self.name
has.boolean = True
- self.registry.append(self)
-
setattr(cls, 'has_%s' % self.attname, has)
def get_current_etag(self):
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'):
+ if not self.with_etag:
return
etag = self.get_current_etag()
fieldfile.build_delay(priority=priority)
@classmethod
- def schedule_all_stale(cls):
+ def schedule_all_stale(cls, model):
"""Schedules all stale ebooks of all formats to rebuild."""
- for field in cls.registry:
- field.schedule_stale()
-
-
-
-class BuildEbook(Task):
- librarian2_api = False
-
- formats = {}
-
- @classmethod
- def register(cls, format_name):
- """A decorator for registering subclasses for particular formats."""
- def wrapper(builder):
- cls.formats[format_name] = builder
- return builder
- return wrapper
-
- @classmethod
- def for_format(cls, format_name):
- """Returns a celery task suitable for specified format."""
- return cls.formats.get(format_name, BuildEbookTask)
+ for field in model._meta.fields:
+ if isinstance(field, cls):
+ field.schedule_stale()
@staticmethod
- def transform(wldoc, fieldfile):
+ def transform(wldoc):
"""Transforms an librarian.WLDocument into an librarian.OutputFile.
-
- By default, it just calls relevant wldoc.as_??? method.
-
"""
- return getattr(wldoc, "as_%s" % fieldfile.field.format_name)()
-
- def run(self, obj, field_name):
- """Just run `build` on FieldFile, can't pass it directly to Celery."""
- 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
+ raise NotImplemented()
def set_file_permissions(self, fieldfile):
if fieldfile.instance.preview:
book = fieldfile.instance
out = self.transform(
book.wldocument2() if self.librarian2_api else book.wldocument(),
- fieldfile)
- fieldfile.save(None, File(open(out.get_filename(), 'rb')), save=False)
+ )
+ with open(out.get_filename(), 'rb') as f:
+ fieldfile.save(None, File(f), save=False)
self.set_file_permissions(fieldfile)
if book.pk is not None:
- book.save(update_fields=[fieldfile.field.attname])
- if fieldfile.field.format_name in app_settings.FORMAT_ZIPS:
- remove_zip(app_settings.FORMAT_ZIPS[fieldfile.field.format_name])
-# Don't decorate BuildEbook, because we want to subclass it.
-BuildEbookTask = shared_task(BuildEbook, ignore_result=True)
+ book.save(update_fields=[self.attname])
+ if self.ZIP:
+ remove_zip(self.ZIP)
+
+
+class XmlField(EbookField):
+ ext = 'xml'
+
+ def build(self, fieldfile):
+ pass
+
+class TxtField(EbookField):
+ ext = 'txt'
-@BuildEbook.register('txt')
-@shared_task(ignore_result=True)
-class BuildTxt(BuildEbook):
@staticmethod
- def transform(wldoc, fieldfile):
+ def transform(wldoc):
return wldoc.as_text()
-@BuildEbook.register('pdf')
-@shared_task(ignore_result=True)
-class BuildPdf(BuildEbook):
+class Fb2Field(EbookField):
+ ext = 'fb2'
+ ZIP = 'wolnelektury_pl_fb2'
+
+ @staticmethod
+ def transform(wldoc):
+ return wldoc.as_fb2()
+
+
+class PdfField(EbookField):
+ ext = 'pdf'
+ ZIP = 'wolnelektury_pl_pdf'
+
@staticmethod
- def transform(wldoc, fieldfile):
+ def transform(wldoc):
return wldoc.as_pdf(
morefloats=settings.LIBRARIAN_PDF_MOREFLOATS, cover=True,
base_url=absolute_url(gallery_url(wldoc.book_info.url.slug)), customizations=['notoc'])
def build(self, fieldfile):
- BuildEbook.build(self, fieldfile)
+ super().build(fieldfile)
clear_cache(fieldfile.instance.slug)
-@BuildEbook.register('epub')
-@shared_task(ignore_result=True)
-class BuildEpub(BuildEbook):
+class EpubField(EbookField):
+ ext = 'epub'
librarian2_api = True
+ ZIP = 'wolnelektury_pl_epub'
@staticmethod
- def transform(wldoc, fieldfile):
+ def transform(wldoc):
from librarian.builders import EpubBuilder
return EpubBuilder(
base_url='file://' + os.path.abspath(gallery_path(wldoc.meta.url.slug)) + '/',
).build(wldoc)
-@BuildEbook.register('mobi')
-@shared_task(ignore_result=True)
-class BuildMobi(BuildEbook):
+class MobiField(EbookField):
+ ext = 'mobi'
librarian2_api = True
+ ZIP = 'wolnelektury_pl_mobi'
@staticmethod
- def transform(wldoc, fieldfile):
+ def transform(wldoc):
from librarian.builders import MobiBuilder
return MobiBuilder(
base_url='file://' + os.path.abspath(gallery_path(wldoc.meta.url.slug)) + '/',
).build(wldoc)
-@BuildEbook.register('html')
-@shared_task(ignore_result=True)
-class BuildHtml(BuildEbook):
+class HtmlField(EbookField):
+ ext = 'html'
+
def build(self, fieldfile):
from django.core.files.base import ContentFile
from slugify import slugify
book = fieldfile.instance
- html_output = self.transform(book.wldocument(parse_dublincore=False), fieldfile)
+ html_output = self.transform(book.wldocument(parse_dublincore=False))
# Delete old fragments, create from scratch if necessary.
book.fragments.all().delete()
return False
@staticmethod
- def transform(wldoc, fieldfile):
+ def transform(wldoc):
# ugly, but we can't use wldoc.book_info here
from librarian import DCNS
url_elem = wldoc.edoc.getroot().find('.//' + DCNS('identifier.url'))
return wldoc.as_html(gallery_path=gal_path, gallery_url=gal_url, base_url=absolute_url(gal_url))
-class BuildCover(BuildEbook):
+class CoverField(EbookField):
+ ext = 'jpg'
+ directory = 'cover'
+
+ @staticmethod
+ def transform(wldoc):
+ return wldoc.as_cover()
+
def set_file_permissions(self, fieldfile):
pass
-@BuildEbook.register('cover_clean')
-@shared_task(ignore_result=True)
-class BuildCoverClean(BuildCover):
- @classmethod
- def transform(cls, wldoc, fieldfile):
+class CoverCleanField(CoverField):
+ directory = 'cover_clean'
+
+ @staticmethod
+ def transform(wldoc):
if wldoc.book_info.cover_box_position == 'none':
from librarian.cover import WLCover
return WLCover(wldoc.book_info, width=240).output_file()
return MarquiseCover(wldoc.book_info, width=240).output_file()
-@BuildEbook.register('cover_thumb')
-@shared_task(ignore_result=True)
-class BuildCoverThumb(BuildCover):
- @classmethod
- def transform(cls, wldoc, fieldfile):
+class CoverThumbField(CoverField):
+ directory = 'cover_thumb'
+
+ @staticmethod
+ def transform(wldoc):
from librarian.cover import WLCover
return WLCover(wldoc.book_info, height=193).output_file()
-@BuildEbook.register('cover_api_thumb')
-@shared_task(ignore_result=True)
-class BuildCoverApiThumb(BuildCover):
- @classmethod
- def transform(cls, wldoc, fieldfile):
+class CoverApiThumbField(CoverField):
+ directory = 'cover_api_thumb'
+
+ @staticmethod
+ def transform(wldoc):
from librarian.cover import WLNoBoxCover
return WLNoBoxCover(wldoc.book_info, height=500).output_file()
-@BuildEbook.register('simple_cover')
-@shared_task(ignore_result=True)
-class BuildSimpleCover(BuildCover):
- @classmethod
- def transform(cls, wldoc, fieldfile):
+class SimpleCoverField(CoverField):
+ directory = 'cover_simple'
+
+ @staticmethod
+ def transform(wldoc):
from librarian.cover import WLNoBoxCover
return WLNoBoxCover(wldoc.book_info, height=1000).output_file()
-@BuildEbook.register('cover_ebookpoint')
-@shared_task(ignore_result=True)
-class BuildCoverEbookpoint(BuildCover):
- @classmethod
- def transform(cls, wldoc, fieldfile):
+class CoverEbookpointField(CoverField):
+ directory = 'cover_ebookpoint'
+
+ @staticmethod
+ def transform(wldoc):
from librarian.cover import EbookpointCover
return EbookpointCover(wldoc.book_info).output_file()
-
-
-# not used, but needed for migrations
-class OverwritingFieldFile(FieldFile):
- """
- Deletes the old file before saving the new one.
- """
-
- def save(self, name, content, *args, **kwargs):
- leave = kwargs.pop('leave', None)
- # delete if there's a file already and there's a new one coming
- if not leave and self and (not hasattr(content, 'path') or content.path != self.path):
- self.delete(save=False)
- return super(OverwritingFieldFile, self).save(name, content, *args, **kwargs)
-
-
-class OverwritingFileField(models.FileField):
- attr_class = OverwritingFieldFile
-
-
-class OverwriteStorage(FileSystemStorage):
-
- def get_available_name(self, name, max_length=None):
- self.delete(name)
- return name
fnp / wolnelektury.git / blobdiff