Epub+mo support

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

diff --git a/src/catalogue/fields.py b/src/catalogue/fields.py
index 4261252..3d10cd8 100644 (file)
--- a/src/catalogue/fields.py
+++ b/src/catalogue/fields.py
@@ -1,20 +1,26 @@
-# -*- 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 catalogue import app_settings
 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
+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.task import Task, task
 from celery.utils.log import get_task_logger
 from waiter.utils import clear_cache
 
 task_logger = get_task_logger(__name__)
 
 from celery.task import Task, 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
+

 
 class EbookFieldFile(FieldFile):
     """Represents contents of an ebook file field."""
 
 class EbookFieldFile(FieldFile):
     """Represents contents of an ebook file field."""


@@ -23,14 +29,34 @@ class EbookFieldFile(FieldFile):
         """Build the ebook immediately."""
         return self.field.builder.build(self)
 
         """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."""
         """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])
+
+    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

+    registry = []

 
     def __init__(self, format_name, *args, **kwargs):
         super(EbookField, self).__init__(*args, **kwargs)
 
     def __init__(self, format_name, *args, **kwargs):
         super(EbookField, self).__init__(*args, **kwargs)


@@ -49,16 +75,58 @@ class EbookField(models.FileField):
     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)
 

+        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
         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)
 
         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):
 
 class BuildEbook(Task):

+    librarian2_api = False
+

     formats = {}
 
     @classmethod
     formats = {}
 
     @classmethod


@@ -85,19 +153,29 @@ class BuildEbook(Task):
 
     def run(self, obj, field_name):
         """Just run `build` on FieldFile, can't pass it directly to Celery."""
 
     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))
         ret = self.build(getattr(obj, field_name))

-        obj.flush_includes()
+        fieldfile.update_etag(etag)
+        obj.clear_cache()

         return ret
 
         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(),
+            fieldfile)
+        fieldfile.save(None, File(open(out.get_filename(), 'rb')), 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
-            })
+            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.
         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.


@@ -117,7 +195,9 @@ class BuildTxt(BuildEbook):
 class BuildPdf(BuildEbook):
     @staticmethod
     def transform(wldoc, fieldfile):
 class BuildPdf(BuildEbook):
     @staticmethod
     def transform(wldoc, fieldfile):

-        return wldoc.as_pdf(morefloats=settings.LIBRARIAN_PDF_MOREFLOATS, cover=True)
+        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)
 
     def build(self, fieldfile):
         BuildEbook.build(self, fieldfile)


@@ -127,9 +207,29 @@ class BuildPdf(BuildEbook):
 @BuildEbook.register('epub')
 @task(ignore_result=True)
 class BuildEpub(BuildEbook):
 @BuildEbook.register('epub')
 @task(ignore_result=True)
 class BuildEpub(BuildEbook):

+    librarian2_api = True
+

     @staticmethod
     def transform(wldoc, fieldfile):
     @staticmethod
     def transform(wldoc, fieldfile):

-        return wldoc.as_epub(cover=True)
+        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)
+
+
+@BuildEbook.register('mobi')
+@task(ignore_result=True)
+class BuildMobi(BuildEbook):
+    librarian2_api = True
+
+    @staticmethod
+    def transform(wldoc, fieldfile):
+        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')
 
 
 @BuildEbook.register('html')


@@ -137,16 +237,14 @@ class BuildEpub(BuildEbook):
 class BuildHtml(BuildEbook):
     def build(self, fieldfile):
         from django.core.files.base import ContentFile
 class BuildHtml(BuildEbook):
     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), fieldfile)

 
         # Delete old fragments, create from scratch if necessary.
         book.fragments.all().delete()
 
         # Delete old fragments, create from scratch if necessary.
         book.fragments.all().delete()


@@ -160,7 +258,8 @@ 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
             })


@@ -179,18 +278,23 @@ 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)
                             tag.sort_key = sortify(theme_name.lower())
                         if created:
                             tag.name = theme_name
                             setattr(tag, "name_%s" % lang, theme_name)
                             tag.sort_key = sortify(theme_name.lower())

+                            tag.for_books = True

                             tag.save()
                         themes.append(tag)
                     elif lang is not None:
                         # Don't create unknown themes in non-default languages.
                         try:
                             tag.save()
                         themes.append(tag)
                     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:


@@ -202,24 +306,92 @@ 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)

+                for theme in themes:
+                    if not theme.for_books:
+                        theme.for_books = True
+                        theme.save()

             book.html_built.send(sender=type(self), instance=book)
             return True
         return False
 
             book.html_built.send(sender=type(self), instance=book)
             return True
         return False
 

+    @staticmethod
+    def transform(wldoc, fieldfile):
+        # 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:
+            gal_url = ''
+            gal_path = ''
+        else:
+            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))
+
+
+class BuildCover(BuildEbook):
+    def set_file_permissions(self, fieldfile):
+        pass
+
+
+@BuildEbook.register('cover_clean')
+@task(ignore_result=True)
+class BuildCoverClean(BuildCover):
+    @classmethod
+    def transform(cls, wldoc, fieldfile):
+        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()
+

 
 @BuildEbook.register('cover_thumb')
 @task(ignore_result=True)
 
 @BuildEbook.register('cover_thumb')
 @task(ignore_result=True)

-class BuildCoverThumb(BuildEbook):
+class BuildCoverThumb(BuildCover):

     @classmethod
     def transform(cls, wldoc, fieldfile):
         from librarian.cover import WLCover
         return WLCover(wldoc.book_info, height=193).output_file()
 
 
     @classmethod
     def transform(cls, wldoc, fieldfile):
         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(BuildCover):
+    @classmethod
+    def transform(cls, wldoc, fieldfile):
+        from librarian.cover import WLNoBoxCover
+        return WLNoBoxCover(wldoc.book_info, height=500).output_file()
+
+
+@BuildEbook.register('simple_cover')
+@task(ignore_result=True)
+class BuildSimpleCover(BuildCover):
+    @classmethod
+    def transform(cls, wldoc, fieldfile):
+        from librarian.cover import WLNoBoxCover
+        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):
     """
         Deletes the old file before saving the new one.
 class OverwritingFieldFile(FieldFile):
     """
         Deletes the old file before saving the new one.


@@ -235,3 +407,10 @@ class OverwritingFieldFile(FieldFile):
 
 class OverwritingFileField(models.FileField):
     attr_class = OverwritingFieldFile
 
 class OverwritingFileField(models.FileField):
     attr_class = OverwritingFieldFile

+
+
+class OverwriteStorage(FileSystemStorage):
+
+    def get_available_name(self, name, max_length=None):
+        self.delete(name)
+        return name