feat: Implement proxy validator and custom error

Author: Rodrigo Solis

src/error.js

@@ -0,0 +1,10 @@
+
+function ValidationError(errors) {
+  this.name = 'ValidationError';
+  this.message = JSON.stringify(errors, null, '  ');
+  this.stack = new Error().stack;
+}
+ValidationError.prototype = Object.create(Error.prototype);
+ValidationError.prototype.constructor = ValidationError;
+
+export default ValidationError;

src/index.js

@@ -0,0 +1,3 @@
+import ProxyValidator from './proxy';
+
+export default ProxyValidator;

src/proxy.js

@@ -0,0 +1,22 @@
+/* eslint no-param-reassign: 0 */
+import ValidationError from './error';
+import { checkRules, applySanitizers } from './validation';
+
+export default function ProxyValidator(schema, sanitizers) {
+  const handler = {
+    set(object, prop, value) {
+      const { [prop]: rules } = schema;
+      const { success, errors } = checkRules(rules, value);
+      if (success) {
+        const { [prop]: transforms } = sanitizers;
+        object[prop] = applySanitizers(transforms, value);
+        return success;
+      }
+      throw new ValidationError(errors);
+    }
+  };
+  return function Proxied() {
+    const target = {};
+    return new Proxy(target, handler);
+  };
+}