Save auth tokens from link shares only in memory, don't persist them to localStorage

Resolves #587

src/helpers/auth.js

@@ -0,0 +1,62 @@
+import {HTTPFactory} from '@/http-common'
+
+let savedToken = null
+let persisted = false
+
+/**
+ * Saves a token while optionally saving it to lacal storage. This is used when viewing a link share:
+ * It enables viewing multiple link shares indipendently from each in multiple tabs other without overriding any other open ones.
+ * @param token
+ * @param persist
+ */
+export const saveToken = (token, persist = true) => {
+	savedToken = token
+	if (persist) {
+		persisted = true
+		localStorage.setItem('token', token)
+	}
+}
+
+/**
+ * Returns a saved token. If there is one saved in memory it will use that before anything else.
+ * @returns {string|null}
+ */
+export const getToken = () => {
+	if (savedToken !== null) {
+		return savedToken
+	}
+
+	savedToken = localStorage.getItem('token')
+	return savedToken
+}
+
+/**
+ * Removes all tokens everywhere.
+ */
+export const removeToken = () => {
+	savedToken = null
+	localStorage.removeItem('token')
+}
+
+/**
+ * Refreshes an auth token while ensuring it is updated everywhere.
+ * @returns {Promise<AxiosResponse<any>>}
+ */
+export const refreshToken = () => {
+	const HTTP = HTTPFactory()
+	return HTTP.post('user/token', null, {
+		headers: {
+			Authorization: `Bearer ${getToken()}`,
+		},
+	})
+		.then(r => {
+			saveToken(r.data.token, persisted)
+			return Promise.resolve(r)
+		})
+		.catch(e => {
+			// eslint-disable-next-line
+			console.log('Error renewing token: ', e)
+			return Promise.reject(e)
+		})
+}
+