Allow more map interactions and refactor map value datastructures

package.json

@@ -30,7 +30,7 @@
   "dependencies": {
     "@fortawesome/fontawesome-free": "^6.1.1",
     "@open-formulieren/design-tokens": "^0.53.0",
-    "@open-formulieren/formio-builder": "^0.34.0",
+    "@open-formulieren/formio-builder": "^0.35.0",
     "@open-formulieren/leaflet-tools": "^1.0.0",
     "@open-formulieren/monaco-json-editor": "^0.2.0",
     "@tinymce/tinymce-react": "^4.3.2",

src/openforms/api/geojson.py

@@ -0,0 +1,65 @@
+from typing import Literal, TypedDict
+
+from django.db import models
+from django.utils.translation import gettext_lazy as _
+
+from drf_polymorphic.serializers import PolymorphicSerializer
+from rest_framework import serializers
+
+
+class GeoJsonGeometryTypes(models.TextChoices):
+    point = "Point", _("Point")
+    polygon = "Polygon", _("Polygon")
+    line_string = "LineString", _("LineString")
+
+
+class GeoJSONCoordinatesField(serializers.ListField):
+    child = serializers.FloatField(required=True, allow_null=False)
+
+    def __init__(self, *args, **kwargs):
+        kwargs["min_length"] = 2
+        kwargs["max_length"] = 2
+        super().__init__(*args, **kwargs)
+
+
+class GeoJSONPointGeometrySerializer(serializers.Serializer):
+    coordinates = GeoJSONCoordinatesField()
+
+
+class GeoJSONLineStringGeometrySerializer(serializers.Serializer):
+    coordinates = serializers.ListField(child=GeoJSONCoordinatesField())
+
+
+class GeoJSONPolygonGeometrySerializer(serializers.Serializer):
+    coordinates = serializers.ListField(
+        child=serializers.ListField(child=GeoJSONCoordinatesField())
+    )
+
+
+class GeoJsonGeometryPolymorphicSerializer(PolymorphicSerializer):
+    type = serializers.ChoiceField(choices=GeoJsonGeometryTypes.choices, required=True)
+
+    discriminator_field = "type"
+    serializer_mapping = {
+        GeoJsonGeometryTypes.point: GeoJSONPointGeometrySerializer,
+        GeoJsonGeometryTypes.line_string: GeoJSONLineStringGeometrySerializer,
+        GeoJsonGeometryTypes.polygon: GeoJSONPolygonGeometrySerializer,
+    }
+
+
+type Coordinates = tuple[float, float]
+
+
+class PointGeometry(TypedDict):
+    type: Literal["Point"]
+    coordinates: Coordinates
+
+
+class LineStringGeometry(TypedDict):
+    type: Literal["LineString"]
+    coordinates: list[Coordinates]
+
+
+class PolygonGeometry(TypedDict):
+    type: Literal["Polygon"]
+    coordinates: list[list[Coordinates]]