Allow validation of GeometryCollection geometries with booleanValid in package boolean-valid

packages/turf-boolean-valid/index.ts

@@ -83,6 +83,31 @@ function booleanValid(feature: Feature<any> | Geometry) {
         }
       }
       return true;
+    case "GeometryCollection":
+      if (!geom.geometries) {
+        return false;
+      }
+
+      // To avoid situations where Geometry Collections nested within one another
+      // could lead to a situation where there is an infinite validation loop,
+      // we enforce the GeoJSON RFC recommendations
+      // (https://datatracker.ietf.org/doc/html/rfc7946#section-3.1.8)
+      // which states that we should not have Nested Geometry Collections
+      return (
+        Array.isArray(geom.geometries) &&
+        geom.geometries.length > 0 &&
+        geom.geometries.every(
+          (geometry: Geometry) =>
+            [
+              "Point",
+              "LineString",
+              "MultiLineString",
+              "MultiPoint",
+              "Polygon",
+              "MultiPolygon",
+            ].includes(geometry.type) && booleanValid(geometry)
+        )
+      );
     default:
       return false;
   }

packages/turf-boolean-valid/package.json

@@ -5,7 +5,8 @@
   "author": "Turf Authors",
   "contributors": [
     "Rowan Winsemius <@rowanwins>",
-    "Denis Carriere <@DenisCarriere>"
+    "Denis Carriere <@DenisCarriere>",
+    "Martin Künzi <@ltkum>"
   ],
   "license": "MIT",
   "bugs": {

packages/turf-boolean-valid/test/false/GeometryCollection/malformed-geometry-in-collection.geojson

@@ -0,0 +1,26 @@
+{
+  "type": "FeatureCollection",
+  "features": [
+    {
+      "type": "Feature",
+      "properties": {},
+      "geometry": {
+        "type": "GeometryCollection",
+        "geometries": [
+          {
+            "type": "Point",
+            "coordinates": [2.8113711933311403]
+          },
+          {
+            "type": "LineString",
+            "coordinates": [
+              [1.285400390625, 4.214943141390651],
+              [0.472412109375, 2.9649843693339677],
+              [1.900634765625, 2.1857489471296665]
+            ]
+          }
+        ]
+      }
+    }
+  ]
+}

packages/turf-boolean-valid/test/false/GeometryCollection/nested-collection.geojson

@@ -0,0 +1,27 @@
+{
+  "type": "FeatureCollection",
+  "features": [
+    {
+      "type": "Feature",
+      "properties": {},
+      "geometry": {
+        "type": "GeometryCollection",
+        "geometries": [
+          {
+            "type": "GeometryCollection",
+            "geometries": [
+              {
+                "type": "Point",
+                "coordinates": [6.7575683593749996, 2.8113711933311403]
+              },
+              {
+                "type": "Point",
+                "coordinates": [2.7575683593749996, 2.8113711933311403]
+              }
+            ]
+          }
+        ]
+      }
+    }
+  ]
+}

packages/turf-boolean-valid/test/false/GeometryCollection/no-type-in-nested-geometry.geojson

@@ -0,0 +1,25 @@
+{
+  "type": "FeatureCollection",
+  "features": [
+    {
+      "type": "Feature",
+      "properties": {},
+      "geometry": {
+        "type": "GeometryCollection",
+        "geometries": [
+          {
+            "coordinates": [6.7575683593749996, 2.8113711933311403]
+          },
+          {
+            "type": "LineString",
+            "coordinates": [
+              [1.285400390625, 4.214943141390651],
+              [0.472412109375, 2.9649843693339677],
+              [1.900634765625, 2.1857489471296665]
+            ]
+          }
+        ]
+      }
+    }
+  ]
+}

packages/turf-boolean-valid/test/false/GeometryCollection/non-geometry-in-collection.geojson

@@ -0,0 +1,26 @@
+{
+  "type": "FeatureCollection",
+  "features": [
+    {
+      "type": "Feature",
+      "properties": {},
+      "geometry": {
+        "type": "GeometryCollection",
+        "geometries": [
+          {
+            "type": "Feature",
+            "properties": {},
+            "geometry": {
+              "type": "Point",
+              "coordinates": [2.7575683593749996, 2.8113711933311403]
+            }
+          },
+          {
+            "type": "Point",
+            "coordinates": [2.7575683593749996, 2.8113711933311403]
+          }
+        ]
+      }
+    }
+  ]
+}

packages/turf-boolean-valid/test/true/GeometryCollection/geometry-collection.geojson

@@ -0,0 +1,26 @@
+{
+  "type": "FeatureCollection",
+  "features": [
+    {
+      "type": "Feature",
+      "properties": {},
+      "geometry": {
+        "type": "GeometryCollection",
+        "geometries": [
+          {
+            "type": "Point",
+            "coordinates": [6.7575683593749996, 2.8113711933311403]
+          },
+          {
+            "type": "LineString",
+            "coordinates": [
+              [1.285400390625, 4.214943141390651],
+              [0.472412109375, 2.9649843693339677],
+              [1.900634765625, 2.1857489471296665]
+            ]
+          }
+        ]
+      }
+    }
+  ]
+}