Validate json settings with ajv

src/shared/settings/Validator.ts

@@ -0,0 +1,20 @@
+import Ajv from 'ajv';
+
+export default class Validator<T> {
+  constructor(
+    private schema: object | boolean,
+  ) {
+  }
+
+  validate(data: any): T {
+    let ajv = new Ajv();
+    let valid = ajv.validate(this.schema, data);
+    if (!valid) {
+      let message = ajv.errors!!
+        .map(err => `'${err.dataPath}' of ${err.keyword} ${err.message}`)
+        .join('; ');
+      throw new TypeError(message);
+    }
+    return data as T;
+  }
+}