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[wolnelektury.git] / src / catalogue / models / book.py

diff --git a/src/catalogue/models/book.py b/src/catalogue/models/book.py
index 9535e90..8b5ac63 100644 (file)
--- a/src/catalogue/models/book.py
+++ b/src/catalogue/models/book.py
@@ -83,27 +83,32 @@ class Book(models.Model):
         null=True, blank=True,
         upload_to=_cover_upload_to,
         storage=bofh_storage, max_length=255)
+    cover_etag = models.CharField(max_length=255, editable=False, default='', db_index=True)
     # Cleaner version of cover for thumbs
     cover_thumb = EbookField(
         'cover_thumb', _('cover thumbnail'),
         null=True, blank=True,
         upload_to=_cover_thumb_upload_to,
         max_length=255)
+    cover_thumb_etag = models.CharField(max_length=255, editable=False, default='', db_index=True)
     cover_api_thumb = EbookField(
         'cover_api_thumb', _('cover thumbnail for mobile app'),
         null=True, blank=True,
         upload_to=_cover_api_thumb_upload_to,
         max_length=255)
+    cover_api_thumb_etag = models.CharField(max_length=255, editable=False, default='', db_index=True)
     simple_cover = EbookField(
         'simple_cover', _('cover for mobile app'),
         null=True, blank=True,
         upload_to=_simple_cover_upload_to,
         max_length=255)
+    simple_cover_etag = models.CharField(max_length=255, editable=False, default='', db_index=True)
     cover_ebookpoint = EbookField(
         'cover_ebookpoint', _('cover for Ebookpoint'),
         null=True, blank=True,
         upload_to=_cover_ebookpoint_upload_to,
         max_length=255)
+    cover_ebookpoint_etag = models.CharField(max_length=255, editable=False, default='', db_index=True)
     ebook_formats = constants.EBOOK_FORMATS
     formats = ebook_formats + ['html', 'xml']
 
@@ -242,6 +247,41 @@ class Book(models.Model):
     def gallery_url(self):
         return gallery_url(self.slug)
 
+    def get_first_text(self):
+        if self.html_file:
+            return self
+        child = self.children.all().order_by('parent_number').first()
+        if child is not None:
+            return child.get_first_text()
+
+    def get_last_text(self):
+        if self.html_file:
+            return self
+        child = self.children.all().order_by('parent_number').last()
+        if child is not None:
+            return child.get_last_text()
+
+    def get_prev_text(self):
+        if not self.parent:
+            return None
+        sibling = self.parent.children.filter(parent_number__lt=self.parent_number).order_by('-parent_number').first()
+        if sibling is not None:
+            return sibling.get_last_text()
+        return self.parent.get_prev_text()
+
+    def get_next_text(self):
+        if not self.parent:
+            return None
+        sibling = self.parent.children.filter(parent_number__gt=self.parent_number).order_by('parent_number').first()
+        if sibling is not None:
+            return sibling.get_first_text()
+        return self.parent.get_next_text()
+
+    def get_siblings(self):
+        if not self.parent:
+            return []
+        return self.parent.children.all().order_by('parent_number')
+
     @property
     def name(self):
         return self.title
@@ -856,6 +896,8 @@ def add_file_fields():
             blank=True,
             default=''
         ).contribute_to_class(Book, field_name)
+        if format_ != 'xml':
+            models.CharField(max_length=255, editable=False, default='', db_index=True).contribute_to_class(Book, f'{field_name}_etag')
 
 
 add_file_fields()