Update client deps: react 16.3, babel 7

client/src/js/utils/index.js

@@ -0,0 +1,64 @@
+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
+  return typeof name === 'string' && name[0] === '#';
+}
+
+export function timestamp(date = new Date()) {
+  const h = padStart(date.getHours(), 2, '0');
+  const m = padStart(date.getMinutes(), 2, '0');
+  return `${h}:${m}`;
+}
+
+const canvas = document.createElement('canvas');
+const ctx = canvas.getContext('2d');
+
+export function stringWidth(str, font) {
+  ctx.font = font;
+  return ctx.measureText(str).width;
+}
+
+export function measureScrollBarWidth() {
+  const outer = document.createElement('div');
+  outer.style.visibility = 'hidden';
+  outer.style.width = '100px';
+
+  document.body.appendChild(outer);
+
+  const widthNoScroll = outer.offsetWidth;
+  outer.style.overflow = 'scroll';
+
+  const inner = document.createElement('div');
+  inner.style.width = '100%';
+  outer.appendChild(inner);
+
+  const widthWithScroll = inner.offsetWidth;
+
+  outer.parentNode.removeChild(outer);
+
+  return widthNoScroll - widthWithScroll;
+}
+
+export function find(arr, pred) {
+  if (!arr) {
+    return null;
+  }
+
+  for (let i = 0; i < arr.length; i++) {
+    if (pred(arr[i])) {
+      return arr[i];
+    }
+  }
+}