Amélioration recherche événements similaires

Fix #400

src/agenda_culturel/models.py

@@ -1187,8 +1187,28 @@ class Event(models.Model):
                         output_field=models.IntegerField(),
                     )
                 )
+                with_emoji = [
+                    s for s in self.tags if any(char in emoji.EMOJI_DATA for char in s)
+                ]
+                if len(with_emoji) > 0:
+                    qs = qs.annotate(
+                        overlap_emoji_tags=RawSQL(
+                            sql="ARRAY(select UNNEST(%s::text[]) INTERSECT select UNNEST(tags))",
+                            params=(with_emoji,),
+                            output_field=ArrayField(models.CharField(max_length=50)),
+                        )
+                    ).annotate(
+                        overlap_emoji_tags_count=Func(
+                            F("overlap_emoji_tags"),
+                            function="CARDINALITY",
+                            output_field=models.IntegerField(),
+                        )
+                    )
+                else:
+                    qs = qs.annotate(overlap_emoji_tags_count=Value(0))
+
             else:
-                qs = qs.annotate(overlap_tags_count=Value(1))
+                qs = qs.annotate(overlap_tags_count=Value(0))
 
             if self.exact_location:
                 qs = (
@@ -1216,7 +1236,8 @@ class Event(models.Model):
                     )
                 )
                 .annotate(
-                    score=F("overlap_tags_count") * 30
+                    score=F("overlap_tags_count") * 20
+                    + F("overlap_emoji_tags_count") * 40
                     + F("similarity_title") * 2
                     + F("similarity_description") * 10
                     + 10 / (F("distance") + 1)