2 files changed, 45 insertions, 1 deletions
diff --git a/opendc-web/opendc-web-ui/src/auth/hook.js b/opendc-web/opendc-web-ui/src/auth/hook.js
new file mode 100644
index 00000000..ddaf53ed
--- /dev/null
+++ b/opendc-web/opendc-web-ui/src/auth/hook.js
@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2021 AtLarge Research
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+import { useEffect, useState } from 'react'
+import { userIsLoggedIn } from './index'
+import { useRouter } from 'next/router'
+
+export function useAuth() {
+    const [isLoggedIn, setLoggedIn] = useState(false)
+
+    useEffect(() => {
+        setLoggedIn(userIsLoggedIn())
+    }, [])
+
+    return isLoggedIn
+}
+
+export function useRequireAuth() {
+    const router = useRouter()
+    useEffect(() => {
+        if (!userIsLoggedIn()) {
+            router.replace('/')
+        }
+    })
+}
diff --git a/opendc-web/opendc-web-ui/src/auth/index.js b/opendc-web/opendc-web-ui/src/auth/index.js
index b5953990..148e2e13 100644
--- a/opendc-web/opendc-web-ui/src/auth/index.js
+++ b/opendc-web/opendc-web-ui/src/auth/index.js
@@ -2,7 +2,7 @@ import { LOG_IN_SUCCEEDED, LOG_OUT } from '../actions/auth'
 import { DELETE_CURRENT_USER_SUCCEEDED } from '../actions/users'
 
 const getAuthObject = () => {
-    const authItem = localStorage.getItem('auth')
+    const authItem = global.localStorage && localStorage.getItem('auth')
     if (!authItem || authItem === '{}') {
         return undefined
     }