chore: Replace packages with native functions (#5140)

app/javascript/dashboard/helper/URLHelper.js

@@ -1,8 +1,7 @@
-import queryString from 'query-string';
 import { DEFAULT_REDIRECT_URL } from '../constants';
 
 export const frontendURL = (path, params) => {
-  const stringifiedParams = params ? `?${queryString.stringify(params)}` : '';
+  const stringifiedParams = params ? `?${new URLSearchParams(params)}` : '';
   return `/app/${path}${stringifiedParams}`;
 };
 

app/javascript/dashboard/helper/flag.js

@@ -0,0 +1,19 @@
+const FLAG_OFFSET = 127397;
+
+/**
+ * Gets emoji flag for given locale.
+ *
+ * @param {string} countryCode locale code
+ * @return {string} emoji flag
+ *
+ * @example
+ * getCountryFlag('cz') // '🇨🇿'
+ */
+export const getCountryFlag = countryCode => {
+  const codePoints = countryCode
+    .toUpperCase()
+    .split('')
+    .map(char => FLAG_OFFSET + char.charCodeAt());
+
+  return String.fromCodePoint(...codePoints);
+};

app/javascript/dashboard/helper/specs/flag.spec.js

@@ -0,0 +1,9 @@
+import { getCountryFlag } from '../flag';
+
+describe('#flag', () => {
+  it('returns the correct flag ', () => {
+    expect(getCountryFlag('cz')).toBe('🇨🇿');
+    expect(getCountryFlag('IN')).toBe('🇮🇳');
+    expect(getCountryFlag('US')).toBe('🇺🇸');
+  });
+});