feat: add html encoder

lib/html-encoder.js

@@ -0,0 +1,19 @@
+'use strict'
+
+const encodeHtml = require('html-entities').encode
+
+const encode = (object) => {
+    const result = {}
+
+    Object.entries(object).forEach(([key, value]) => {
+        if (typeof value === 'object') {
+            result[key] = encode(value)
+        } else {
+            result[key] = encodeHtml(value)
+        }
+    })
+
+    return result
+}
+
+module.exports = encode

test/spec/html-encoder.spec.js

@@ -0,0 +1,22 @@
+'use strict'
+
+const encode = require('../../lib/html-encoder')
+
+const { expect } = require('chai')
+
+describe('HtmlEncoder', () => {
+    it('encodes recursively', () => {
+        const object = {
+            nested1: {
+                nested2: {
+                    left: '<',
+                    right: '>'
+                }
+            }
+        }
+
+        const encoded = encode(object)
+        expect(encoded.nested1.nested2.left).to.equal('&lt;')
+        expect(encoded.nested1.nested2.right).to.equal('&gt;')
+    })
+})