[Fixes #11617] Introduce icons for thesauri keywords (#11618)

* Introduce icons for thesauri keywords

* fix black

geonode/base/migrations/0087_thesauruskeyword_icon.py

+# Generated by Django 3.2.22 on 2023-10-18 14:53
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('base', '0086_linkedresource'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='thesauruskeyword',
+            name='icon',
+            field=models.CharField(blank=True, max_length=512, null=True, help_text='It can be a fa-class name or a URL to an image'),
+        ),
+    ]

geonode/base/models.py

@@ -545,6 +545,10 @@ class ThesaurusKeyword(models.Model):
 
     thesaurus = models.ForeignKey("Thesaurus", related_name="thesaurus", on_delete=models.CASCADE)
 
+    icon = models.CharField(
+        max_length=512, help_text="It can be a fa-class name or a URL to an image", null=True, blank=True
+    )
+
     def __str__(self):
         return str(self.alt_label)
 

geonode/facets/providers/thesaurus.py

@@ -79,7 +79,7 @@ class ThesaurusFacetProvider(FacetProvider):
 
         q = (
             queryset.filter(**filter)
-            .values("tkeywords", "tkeywords__alt_label")
+            .values("tkeywords", "tkeywords__alt_label", "tkeywords__icon")
             .annotate(count=Count("tkeywords"))
             .annotate(
                 localized_label=Subquery(
@@ -102,6 +102,7 @@ class ThesaurusFacetProvider(FacetProvider):
                 "label": r["localized_label"] or r["tkeywords__alt_label"],
                 "is_localized": r["localized_label"] is not None,
                 "count": r["count"],
+                "icon": r["tkeywords__icon"],
             }
             for r in q[start:end].all()
         ]