Fix supplier query - aggregate through offers

Only show suppliers that have active offers.

geo_app/cluster_index.py

@@ -43,11 +43,26 @@ def _fetch_nodes(db, transport_type=None, node_type=None):
                     RETURN node
                 """
             elif node_type == 'supplier':
+                # Get suppliers that have offers (aggregate through offers)
                 aql = """
-                FOR node IN nodes
-                    FILTER node.node_type == 'supplier'
-                    FILTER node.latitude != null AND node.longitude != null
-                    RETURN node
+                FOR offer IN nodes
+                    FILTER offer.node_type == 'offer'
+                    FILTER offer.supplier_uuid != null
+                    LET supplier = DOCUMENT(CONCAT('nodes/', offer.supplier_uuid))
+                    FILTER supplier != null
+                    FILTER supplier.latitude != null AND supplier.longitude != null
+                    COLLECT sup_uuid = offer.supplier_uuid INTO offers
+                    LET sup = DOCUMENT(CONCAT('nodes/', sup_uuid))
+                    RETURN {
+                        _key: sup_uuid,
+                        name: sup.name,
+                        latitude: sup.latitude,
+                        longitude: sup.longitude,
+                        country: sup.country,
+                        country_code: sup.country_code,
+                        node_type: 'supplier',
+                        offers_count: LENGTH(offers)
+                    }
                 """
             else:  # logistics (default)
                 aql = """