Initial commit

client/src/utils/access-token-storage.js

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+const ACCESS_TOKEN_KEY = 'accessToken';
+
+export const getAccessToken = () => localStorage.getItem(ACCESS_TOKEN_KEY);
+
+export const setAccessToken = (accessToken) => {
+  localStorage.setItem(ACCESS_TOKEN_KEY, accessToken);
+};
+
+export const removeAccessToken = () => {
+  localStorage.removeItem(ACCESS_TOKEN_KEY);
+};

client/src/utils/local-id.js

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+export const nextLocalId = (maxId = 0) => maxId + Date.now() / 10000000000000;
+
+export const isLocalId = (id) => id % 1 !== 0;

client/src/utils/match-paths.js

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+import { matchPath } from 'react-router-dom';
+
+export default (pathname, paths) => {
+  for (let i = 0; i < paths.length; i += 1) {
+    const match = matchPath(pathname, {
+      path: paths[i],
+      exact: true,
+    });
+
+    if (match) {
+      return match;
+    }
+  }
+
+  return null;
+};

client/src/utils/timer.js

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+// eslint-disable-next-line max-len
+const getFullSeconds = ({ startedAt, total }) => (startedAt ? Math.floor((new Date() - startedAt) / 1000) + total : total);
+
+export const createTimer = ({ hours, minutes, seconds }) => ({
+  startedAt: null,
+  total: hours * 60 * 60 + minutes * 60 + seconds,
+});
+
+export const updateTimer = ({ startedAt }, parts) => ({
+  ...createTimer(parts),
+  startedAt: startedAt && new Date(),
+});
+
+export const startTimer = (timer) => ({
+  startedAt: new Date(),
+  total: timer ? timer.total : 0,
+});
+
+export const stopTimer = (timer) => ({
+  startedAt: null,
+  total: getFullSeconds(timer),
+});
+
+export const getTimerParts = (timer) => {
+  const fullSeconds = getFullSeconds(timer);
+
+  const hours = Math.floor(fullSeconds / 3600);
+  const minutes = Math.floor((fullSeconds - hours * 3600) / 60);
+  const seconds = fullSeconds - hours * 3600 - minutes * 60;
+
+  return {
+    hours,
+    minutes,
+    seconds,
+  };
+};
+
+export const formatTimer = (timer) => {
+  const { hours, minutes, seconds } = getTimerParts(timer);
+
+  return [hours, ...[minutes, seconds].map((part) => (part < 10 ? `0${part}` : part))].join(':');
+};