Add missing constraint.

[wolnelektury.git] / src / catalogue / fields.py

diff --git a/src/catalogue/fields.py b/src/catalogue/fields.py
index 911f857..c592c55 100644 (file)
--- a/src/catalogue/fields.py
+++ b/src/catalogue/fields.py
@@ -1,20 +1,32 @@
-# -*- coding: utf-8 -*-

 # This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 #
 # This file is part of Wolnelektury, licensed under GNU Affero GPLv3 or later.
 # Copyright © Fundacja Nowoczesna Polska. See NOTICE for more information.
 #

+import os

 from django.conf import settings
 from django.core.files import File
 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 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.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
+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 waiter.utils import clear_cache
 
 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):
 
 
 class EbookFieldFile(FieldFile):


@@ -22,139 +34,234 @@ class EbookFieldFile(FieldFile):
 
     def build(self):
         """Build the ebook immediately."""
 
     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):
+    def build_delay(self, priority=EBOOK_BUILD_PRIORITY):

         """Builds the ebook in a delayed task."""
         """Builds the ebook in a delayed task."""

-        return self.field.builder.delay(self.instance, self.field.attname)
+        from .tasks import build_field
+
+        self.update_etag(
+            "".join([self.field.get_current_etag(), ETAG_SCHEDULED_SUFFIX])
+        )
+        return build_field.apply_async(
+            [self.instance.pk, self.field.attname],
+            priority=priority
+        )
+
+    def set_readable(self, readable):
+        import os
+        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
 
 
 class EbookField(models.FileField):
     """Represents an ebook file field, attachable to a model."""
     attr_class = EbookFieldFile

+    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):
 
     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
 
         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)
 
 
     def contribute_to_class(self, cls, name):
         super(EbookField, self).contribute_to_class(cls, name)
 

+        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.__doc__ = None
         has.__name__ = str("has_%s" % self.attname)
         has.short_description = self.name
         has.boolean = True
         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

-        setattr(cls, 'has_%s' % self.attname, has)

 
 

+        setattr(cls, 'has_%s' % self.attname, has)

 
 

-class BuildEbook(Task):
-    formats = {}
+    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 self.with_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
 
     @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)
+    def schedule_all_stale(cls, model):
+        """Schedules all stale ebooks of all formats to rebuild."""
+        for field in model._meta.fields:
+            if isinstance(field, cls):
+                field.schedule_stale()

 
     @staticmethod
 
     @staticmethod

-    def transform(wldoc, fieldfile):
+    def transform(wldoc):

         """Transforms an librarian.WLDocument into an librarian.OutputFile.
         """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)()
+        raise NotImplemented()

 
 

-    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))
-        ret = self.build(getattr(obj, field_name))
-        obj.flush_includes()
-        return ret
+    def set_file_permissions(self, fieldfile):
+        if fieldfile.instance.preview:
+            fieldfile.set_readable(False)

 
     def build(self, fieldfile):
         book = fieldfile.instance
 
     def build(self, fieldfile):
         book = fieldfile.instance

-        out = self.transform(book.wldocument(), fieldfile)
-        fieldfile.save(None, File(open(out.get_filename())), save=False)
+        out = self.transform(
+            book.wldocument2() if self.librarian2_api else book.wldocument(),
+        )
+        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:
         if book.pk is not None:

-            type(book).objects.filter(pk=book.pk).update(**{
-                fieldfile.field.attname: fieldfile
-            })
-        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 = 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')
-@task(ignore_result=True)
-class BuildTxt(BuildEbook):

     @staticmethod
     @staticmethod

-    def transform(wldoc, fieldfile):
+    def transform(wldoc):

         return wldoc.as_text()
 
 
         return wldoc.as_text()
 
 

-@BuildEbook.register('pdf')
-@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
     @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))
+    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):
 
     def build(self, fieldfile):

-        BuildEbook.build(self, fieldfile)
+        super().build(fieldfile)

         clear_cache(fieldfile.instance.slug)
 
 
         clear_cache(fieldfile.instance.slug)
 
 

-@BuildEbook.register('epub')
-@task(ignore_result=True)
-class BuildEpub(BuildEbook):
+class EpubField(EbookField):
+    ext = 'epub'
+    librarian2_api = True
+    ZIP = 'wolnelektury_pl_epub'
+

     @staticmethod
     @staticmethod

-    def transform(wldoc, fieldfile):
-        return wldoc.as_epub(cover=True, ilustr_path=gallery_path(wldoc.book_info.url.slug))
+    def transform(wldoc):
+        from librarian.builders import EpubBuilder
+        return EpubBuilder(
+                base_url='file://' + os.path.abspath(gallery_path(wldoc.meta.url.slug)) + '/',
+                fundraising=settings.EPUB_FUNDRAISING
+            ).build(wldoc)
+

 
 

+class MobiField(EbookField):
+    ext = 'mobi'
+    librarian2_api = True
+    ZIP = 'wolnelektury_pl_mobi'

 
 

-@BuildEbook.register('mobi')
-@task(ignore_result=True)
-class BuildMobi(BuildEbook):

     @staticmethod
     @staticmethod

-    def transform(wldoc, fieldfile):
-        return wldoc.as_mobi(cover=True, ilustr_path=gallery_path(wldoc.book_info.url.slug))
+    def transform(wldoc):
+        from librarian.builders import MobiBuilder
+        return MobiBuilder(
+                base_url='file://' + os.path.abspath(gallery_path(wldoc.meta.url.slug)) + '/',
+                fundraising=settings.EPUB_FUNDRAISING
+            ).build(wldoc)

 
 
 
 

-@BuildEbook.register('html')
-@task(ignore_result=True)
-class BuildHtml(BuildEbook):
+class HtmlField(EbookField):
+    ext = 'html'
+

     def build(self, fieldfile):
         from django.core.files.base import ContentFile
     def build(self, fieldfile):
         from django.core.files.base import ContentFile

-        from fnpdjango.utils.text.slughifi import slughifi
+        from slugify import slugify

         from sortify import sortify
         from librarian import html
         from catalogue.models import Fragment, Tag
 
         book = fieldfile.instance
 
         from sortify import sortify
         from librarian import html
         from catalogue.models import Fragment, Tag
 
         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()
 
         # Delete old fragments, create from scratch if necessary.
         book.fragments.all().delete()


@@ -168,7 +275,8 @@ class BuildHtml(BuildEbook):
             if lang not in [ln[0] for ln in settings.LANGUAGES]:
                 lang = None
 
             if lang not in [ln[0] for ln in settings.LANGUAGES]:
                 lang = None
 

-            fieldfile.save(None, ContentFile(html_output.get_string()), save=False)
+            fieldfile.save(None, ContentFile(html_output.get_bytes()), save=False)
+            self.set_file_permissions(fieldfile)

             type(book).objects.filter(pk=book.pk).update(**{
                 fieldfile.field.attname: fieldfile
             })
             type(book).objects.filter(pk=book.pk).update(**{
                 fieldfile.field.attname: fieldfile
             })


@@ -187,8 +295,9 @@ class BuildHtml(BuildEbook):
                     if lang == settings.LANGUAGE_CODE:
                         # Allow creating themes if book in default language.
                         tag, created = Tag.objects.get_or_create(
                     if lang == settings.LANGUAGE_CODE:
                         # Allow creating themes if book in default language.
                         tag, created = Tag.objects.get_or_create(

-                                            slug=slughifi(theme_name),
-                                            category='theme')
+                            slug=slugify(theme_name),
+                            category='theme'
+                        )

                         if created:
                             tag.name = theme_name
                             setattr(tag, "name_%s" % lang, theme_name)
                         if created:
                             tag.name = theme_name
                             setattr(tag, "name_%s" % lang, theme_name)


@@ -199,7 +308,10 @@ class BuildHtml(BuildEbook):
                     elif lang is not None:
                         # Don't create unknown themes in non-default languages.
                         try:
                     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:
                         except Tag.DoesNotExist:
                             pass
                         else:


@@ -211,7 +323,12 @@ class BuildHtml(BuildEbook):
                 short_text = truncate_html_words(text, 15)
                 if text == short_text:
                     short_text = ''
                 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)
 
                 new_fragment.save()
                 new_fragment.tags = set(meta_tags + themes)


@@ -224,64 +341,75 @@ class BuildHtml(BuildEbook):
         return False
 
     @staticmethod
         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'))
         if url_elem is None:
         # ugly, but we can't use wldoc.book_info here
         from librarian import DCNS
         url_elem = wldoc.edoc.getroot().find('.//' + DCNS('identifier.url'))
         if url_elem is None:

-            gallery = ''
+            gal_url = ''
+            gal_path = ''

         else:
         else:

-            gallery = gallery_url(slug=url_elem.text.rsplit('/', 1)[1])
-        return wldoc.as_html(options={'gallery': "'%s'" % gallery})
+            slug = url_elem.text.rstrip('/').rsplit('/', 1)[1]
+            gal_url = gallery_url(slug=slug)
+            gal_path = gallery_path(slug=slug)
+        return wldoc.as_html(gallery_path=gal_path, gallery_url=gal_url, base_url=absolute_url(gal_url))

 
 
 
 

-@BuildEbook.register('cover_thumb')
-@task(ignore_result=True)
-class BuildCoverThumb(BuildEbook):
-    @classmethod
-    def transform(cls, wldoc, fieldfile):
+class CoverField(EbookField):
+    ext = 'jpg'
+    directory = 'cover'
+
+    @staticmethod
+    def transform(wldoc):
+        return wldoc.as_cover()
+
+    def set_file_permissions(self, fieldfile):
+        pass
+
+
+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()
+        from librarian.covers.marquise import MarquiseCover
+        return MarquiseCover(wldoc.book_info, width=240).output_file()
+
+
+class CoverThumbField(CoverField):
+    directory = 'cover_thumb'
+
+    @staticmethod
+    def transform(wldoc):

         from librarian.cover import WLCover
         return WLCover(wldoc.book_info, height=193).output_file()
 
 
         from librarian.cover import WLCover
         return WLCover(wldoc.book_info, height=193).output_file()
 
 

-@BuildEbook.register('cover_api_thumb')
-@task(ignore_result=True)
-class BuildCoverApiThumb(BuildEbook):
-    @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()
 
 
         from librarian.cover import WLNoBoxCover
         return WLNoBoxCover(wldoc.book_info, height=500).output_file()
 
 

-@BuildEbook.register('simple_cover')
-@task(ignore_result=True)
-class BuildSimpleCover(BuildEbook):
-    @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()
 
 
         from librarian.cover import WLNoBoxCover
         return WLNoBoxCover(wldoc.book_info, height=1000).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 CoverEbookpointField(CoverField):
+    directory = 'cover_ebookpoint'

 
 

-
-class OverwriteStorage(FileSystemStorage):
-
-    def get_available_name(self, name, max_length=None):
-        self.delete(name)
-        return name
+    @staticmethod
+    def transform(wldoc):
+        from librarian.cover import EbookpointCover
+        return EbookpointCover(wldoc.book_info).output_file()