Implement a JSON and a JSON-file renderer.

src/main/resources/labyrinth.schema.json

@@ -0,0 +1,69 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://manuel.friedli.info/labyrinth-1/labyrinth.schema.json",
+  "javaType": "ch.fritteli.labyrinth.generator.json.JsonLabyrinth",
+  "type": "object",
+  "additionalProperties": false,
+  "required": [
+    "id",
+    "width",
+    "height",
+    "grid"
+  ],
+  "properties": {
+    "id": {
+      "type": "integer",
+      "existingJavaType": "java.lang.Long"
+    },
+    "width": {
+      "type": "integer",
+      "minimum": 1
+    },
+    "height": {
+      "type": "integer",
+      "minimum": 1
+    },
+    "grid": {
+      "$ref": "#/$defs/grid"
+    }
+  },
+  "$defs": {
+    "grid": {
+      "type": "array",
+      "items": {
+        "$ref": "#/$defs/row"
+      },
+      "minItems": 1
+    },
+    "row": {
+      "type": "array",
+      "items": {
+        "$ref": "#/$defs/cell"
+      },
+      "minItems": 1
+    },
+    "cell": {
+      "type": "object",
+      "javaType": "ch.fritteli.labyrinth.generator.json.JsonCell",
+      "additionalProperties": false,
+      "required": [],
+      "properties": {
+        "top": {
+          "type": "boolean"
+        },
+        "right": {
+          "type": "boolean"
+        },
+        "bottom": {
+          "type": "boolean"
+        },
+        "left": {
+          "type": "boolean"
+        },
+        "solution": {
+          "type": "boolean"
+        }
+      }
+    }
+  }
+}