Add tweaks to update notes

apps/participation/models.py

@@ -380,7 +380,8 @@ class Pool(models.Model):
         return Solution.objects.filter(participation__in=self.participations, final_solution=self.tournament.final)
 
     def average(self, participation):
-        return sum(passage.average(participation) for passage in self.passages.all())
+        return sum(passage.average(participation) for passage in self.passages.all()) \
+               + sum(tweak.diff for tweak in participation.tweaks.filter(pool=self).all())
 
     def get_absolute_url(self):
         return reverse_lazy("participation:pool_detail", args=(self.pk,))
@@ -514,6 +515,30 @@ class Passage(models.Model):
         verbose_name_plural = _("passages")
 
 
+class Tweak(models.Model):
+    pool = models.ForeignKey(
+        Pool,
+        on_delete=models.CASCADE,
+        verbose_name=_("passage"),
+    )
+
+    participation = models.ForeignKey(
+        Participation,
+        on_delete=models.CASCADE,
+        verbose_name=_("participation"),
+        related_name='tweaks',
+    )
+
+    diff = models.IntegerField(
+        verbose_name=_("difference"),
+        help_text=_("Score to add/remove on the final score"),
+    )
+
+    class Meta:
+        verbose_name = _("tweak")
+        verbose_name_plural = _("tweaks")
+
+
 def get_solution_filename(instance, filename):
     return f"solutions/{instance.participation.team.trigram}_{instance.problem}" \
            + ("final" if instance.final_solution else "")