chore: generate v4 json schemas based with zod (#279)

* chore: generate v4 json schemas based with zod

* fix: small typo

package.json

@@ -40,6 +40,7 @@
     "lint": "eslint . --ext .ts,.json --max-warnings 0",
     "lint:fix": "npm run lint -- --fix",
     "generate-v4-fixtures": "npx ts-node scripts/generateV4JsonFixtures.ts",
+    "generate-v4-json-schemas": "npx ts-node scripts/generateV4JsonSchemas.ts",
     "publish:schema": "./scripts/publishSchema.sh",
     "postinstall": "node scripts/postInstall; npm run generate-v4-fixtures",
     "prebuild": "node scripts/preBuild"
@@ -90,7 +91,8 @@
     "semantic-release": "^22.0.8",
     "ts-jest": "^29.1.2",
     "ts-node": "^10.9.2",
-    "typescript": "^5.1.6"
+    "typescript": "^5.1.6",
+    "zod-to-json-schema": "^3.23.0"
   },
   "dependencies": {
     "@govtechsg/jsonld": "^0.1.0",

scripts/generateV4JsonSchemas.ts

@@ -0,0 +1,36 @@
+import fs from "fs";
+import path from "path";
+import { zodToJsonSchema } from "zod-to-json-schema";
+import { V4Document, V4WrappedDocument, V4SignedWrappedDocument } from "../src/4.0/types";
+
+const OUTPUT_DIR = path.resolve("./src/4.0/jsonSchemas/__generated__");
+
+// make sure the output directory exists
+if (fs.existsSync(OUTPUT_DIR)) {
+  fs.rmSync(OUTPUT_DIR, { recursive: true });
+}
+fs.mkdirSync(OUTPUT_DIR, { recursive: true });
+
+const ZOD_SCHEMAS = [
+  {
+    filename: "v4-document.schema.json",
+    schemaName: "v4Document",
+    zodSchema: V4Document,
+  },
+  {
+    filename: "v4-wrapped-document.schema.json",
+    schemaName: "v4WrappedDocument",
+    zodSchema: V4WrappedDocument,
+  },
+  {
+    filename: "v4-signed-wrapped-document.schema.json",
+    schemaName: "v4SignedWrappedDocument",
+    zodSchema: V4SignedWrappedDocument,
+  },
+];
+
+for (const { filename, zodSchema, schemaName } of ZOD_SCHEMAS) {
+  const jsonSchema = zodToJsonSchema(zodSchema, schemaName);
+
+  fs.writeFileSync(path.join(OUTPUT_DIR, filename), JSON.stringify(jsonSchema, null, 2));
+}