Ignore hashtags when sorting channels

client/js/utils/__tests__/util.test.js

@@ -1,10 +1,24 @@
 import React from 'react';
 import TestRenderer from 'react-test-renderer';
-import { isChannel, isValidNick, isValidChannel, isValidUsername } from '..';
+import {
+  trimPrefixChar,
+  isChannel,
+  isValidNick,
+  isValidChannel,
+  isValidUsername
+} from '..';
 import linkify from '../linkify';
 
 const render = el => TestRenderer.create(el).toJSON();
 
+describe('trimPrefixChar()', () => {
+  it('trims prefix characters', () => {
+    expect(trimPrefixChar('##chan', '#')).toBe('chan');
+    expect(trimPrefixChar('#chan', '#')).toBe('chan');
+    expect(trimPrefixChar('chan', '#')).toBe('chan');
+  });
+});
+
 describe('isChannel()', () => {
   it('it handles strings', () => {
     expect(isChannel('#cake')).toBe(true);

client/js/utils/index.js

@@ -3,14 +3,6 @@ import padStart from 'lodash/padStart';
 export { findBreakpoints, messageHeight } from './messageHeight';
 export { default as linkify } from './linkify';
 
-export function normalizeChannel(channel) {
-  if (channel.indexOf('#') !== 0) {
-    return channel;
-  }
-
-  return channel.split('#').join('').toLowerCase();
-}
-
 export function isChannel(name) {
   // TODO: Handle other channel types
   if (typeof name === 'object') {
@@ -42,6 +34,22 @@ function isString(s, maxLength) {
   return true;
 }
 
+export function trimPrefixChar(str, char) {
+  if (!isString(str)) {
+    return str;
+  }
+
+  let start = 0;
+  while (str[start] === char) {
+    start++;
+  }
+
+  if (start > 0) {
+    return str.slice(start);
+  }
+  return str;
+}
+
 // RFC 2812
 // nickname = ( letter / special ) *( letter / digit / special / "-" )
 // letter   = A-Z / a-z