Add schema validators for map state

src/validators/Note.ts

@@ -0,0 +1,62 @@
+import Ajv, { JSONSchemaType } from "ajv";
+import { Note } from "../types/Note";
+
+import { Vector2Schema } from "./Vector2";
+import { ColorSchema } from "./Color";
+
+export const NoteSchema: JSONSchemaType<Note> = {
+  $id: "https://www.owlbear.rodeo/schemas/note.json",
+  properties: {
+    color: {
+      $ref: "color.json",
+    },
+    id: {
+      type: "string",
+    },
+    lastModified: {
+      type: "number",
+    },
+    lastModifiedBy: {
+      type: "string",
+    },
+    locked: {
+      type: "boolean",
+    },
+    size: {
+      type: "number",
+    },
+    text: {
+      type: "string",
+    },
+    textOnly: {
+      type: "boolean",
+    },
+    visible: {
+      type: "boolean",
+    },
+    x: {
+      type: "number",
+    },
+    y: {
+      type: "number",
+    },
+  },
+  required: [
+    "color",
+    "id",
+    "lastModified",
+    "lastModifiedBy",
+    "locked",
+    "size",
+    "text",
+    "textOnly",
+    "visible",
+    "x",
+    "y",
+  ],
+  type: "object",
+};
+
+const ajv = new Ajv({ schemas: [NoteSchema, ColorSchema, Vector2Schema] });
+
+export const isNote = ajv.compile<Note>(NoteSchema);