From e4b7f754b5f44278189a4136375ee63a4393f134 Mon Sep 17 00:00:00 2001
From: Kushal Pandya <kushal@gitlab.com>
Date: Wed, 7 Feb 2018 18:28:41 +0530
Subject: Add `convertObjectPropsToCamelCase` helper method

---
 app/assets/javascripts/lib/utils/common_utils.js | 21 +++++++++++++++++
 spec/javascripts/lib/utils/common_utils_spec.js  | 29 ++++++++++++++++++++++++
 2 files changed, 50 insertions(+)

diff --git a/app/assets/javascripts/lib/utils/common_utils.js b/app/assets/javascripts/lib/utils/common_utils.js
index 5811d059e0b..7d2cf4b634f 100644
--- a/app/assets/javascripts/lib/utils/common_utils.js
+++ b/app/assets/javascripts/lib/utils/common_utils.js
@@ -1,5 +1,6 @@
 import axios from './axios_utils';
 import { getLocationHash } from './url_utility';
+import { convertToCamelCase } from './text_utility';
 
 export const getPagePath = (index = 0) => $('body').attr('data-page').split(':')[index];
 
@@ -395,6 +396,26 @@ export const spriteIcon = (icon, className = '') => {
   return `<svg ${classAttribute}><use xlink:href="${gon.sprite_icons}#${icon}" /></svg>`;
 };
 
+/**
+ * This method takes in object with snake_case property names
+ * and returns new object with camelCase property names
+ *
+ * Reasoning for this method is to ensure consistent property
+ * naming conventions across JS code.
+ */
+export const convertObjectPropsToCamelCase = (obj = {}) => {
+  if (obj === null) {
+    return {};
+  }
+
+  return Object.keys(obj).reduce((acc, prop) => {
+    const result = acc;
+
+    result[convertToCamelCase(prop)] = obj[prop];
+    return acc;
+  }, {});
+};
+
 export const imagePath = imgUrl => `${gon.asset_host || ''}${gon.relative_url_root || ''}/assets/${imgUrl}`;
 
 window.gl = window.gl || {};
diff --git a/spec/javascripts/lib/utils/common_utils_spec.js b/spec/javascripts/lib/utils/common_utils_spec.js
index 80430011aed..89d1f0329e5 100644
--- a/spec/javascripts/lib/utils/common_utils_spec.js
+++ b/spec/javascripts/lib/utils/common_utils_spec.js
@@ -480,4 +480,33 @@ describe('common_utils', () => {
       expect(commonUtils.spriteIcon('test', 'fa fa-test')).toEqual('<svg class="fa fa-test"><use xlink:href="icons.svg#test" /></svg>');
     });
   });
+
+  describe('convertObjectPropsToCamelCase', () => {
+    it('returns new object with camelCase property names by converting object with snake_case names', () => {
+      const snakeRegEx = /(_\w)/g;
+      const mockObj = {
+        id: 1,
+        group_name: 'GitLab.org',
+        absolute_web_url: 'https://gitlab.com/gitlab-org/',
+      };
+      const mappings = {
+        id: 'id',
+        groupName: 'group_name',
+        absoluteWebUrl: 'absolute_web_url',
+      };
+
+      const convertedObj = commonUtils.convertObjectPropsToCamelCase(mockObj);
+
+      Object.keys(convertedObj).forEach((prop) => {
+        expect(snakeRegEx.test(prop)).toBeFalsy();
+        expect(convertedObj[prop]).toBe(mockObj[mappings[prop]]);
+      });
+    });
+
+    it('return empty object if method is called with null or undefined', () => {
+      expect(typeof commonUtils.convertObjectPropsToCamelCase(null)).toBe('object');
+      expect(typeof commonUtils.convertObjectPropsToCamelCase()).toBe('object');
+      expect(typeof commonUtils.convertObjectPropsToCamelCase({})).toBe('object');
+    });
+  });
 });
-- 
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