setup validator

Signed-off-by: shmck <[email protected]>

Author: ShMcK

package-lock.json

@@ -19,6 +19,7 @@
   "author": "Argemiro Neto",
   "license": "ISC",
   "dependencies": {
+    "ajv": "^6.12.2",
     "arg": "^4.1.3",
     "esm": "^3.2.25",
     "inquirer": "^7.1.0",
@@ -31,6 +32,7 @@
   },
   "devDependencies": {
     "@babel/preset-typescript": "^7.10.1",
+    "@types/ajv": "^1.0.0",
     "@types/inquirer": "^6.5.0",
     "@types/jest": "^25.2.3",
     "@types/js-yaml": "^3.12.4",

package.json

@@ -1,4 +1,3 @@
-import * as yamlParser from "js-yaml";
 import * as path from "path";
 import * as _ from "lodash";
 import * as fs from "fs";

src/build.ts

@@ -0,0 +1,23 @@
+import * as T from "../../typings/tutorial";
+import schema from "./schema";
+
+// https://www.npmjs.com/package/ajv
+// @ts-ignore ajv typings not working
+import JsonSchema from "ajv";
+
+export function validateSchema(json: T.Tutorial) {
+  // validate using https://json-schema.org/
+  const jsonSchema = new JsonSchema({ allErrors: true, verbose: true });
+  // support draft-07 of json schema
+  jsonSchema.addMetaSchema(require("ajv/lib/refs/json-schema-draft-07.json"));
+
+  const valid = jsonSchema.compile(schema, json);
+
+  if (!valid) {
+    // log errors
+    console.log(jsonSchema.errorsText());
+    throw new Error("Invalid schema. See log for details");
+  }
+
+  return true;
+}