[books] Calculate page data on scrobble save

vrobbler/apps/scrobbles/models.py

@@ -571,6 +571,8 @@ class Scrobble(TimeStampedModel):
         return reverse("scrobbles:finish", kwargs={"uuid": self.uuid})
 
     def save(self, *args, **kwargs):
+        class_name = self.media_obj.__class__.__name__
+
         if not self.uuid:
             self.uuid = uuid4()
 
@@ -593,6 +595,9 @@ class Scrobble(TimeStampedModel):
                 self.stop_timestamp - self.timestamp
             ).seconds
 
+        if class_name == "Book":
+            self.calculate_reading_stats(commit=False)
+
         if (
             self.log
             and isinstance(self.log, dict)
@@ -600,16 +605,14 @@ class Scrobble(TimeStampedModel):
             and self.log.get("page_end") is not None
             and "pages_read" not in self.log
         ):
-            self.log["pages_read"] = (
-                self.log["page_end"] - self.log["page_start"] + 1
-            )
+            self.log["pages_read"] = self.log["page_end"] - self.log["page_start"] + 1
 
         return super(Scrobble, self).save(*args, **kwargs)
 
     def get_absolute_url(self):
         if not self.uuid:
             self.uuid = uuid4()
-            self.save()
+            self.save(update_fields=["uuid"])
         return reverse("scrobbles:detail", kwargs={"uuid": self.uuid})
 
     def push_to_archivebox(self):