Update version and add redirect script

manifest.json

@@ -1,7 +1,7 @@
 {
   "manifest_version": 3,
   "name": "FastHKU",
-  "version": "2.1",
+  "version": "2.2",
   "description": "One step to access HKU services",
   "content_scripts": [
     {
@@ -21,6 +21,10 @@
       "matches": ["https://moodle.hku.hk/login/index.php"],
       "js": ["scripts/moodle_goto_login.js"],
       "run_at": "document_end"
+    },
+    {
+      "matches": ["https://moodle.hku.hk/"],
+      "js": ["scripts/redirect_to_login.js"]
     }
   ],
   "action": {

scripts/redirect_to_login.js

@@ -0,0 +1,13 @@
+
+
+try {
+    // check if user is logged in
+    if (document.getElementsByClassName("pull-right")[0].getElementsByTagName("a")[0].innerHTML == "login") {
+        // user is not logged in
+        // redirect to login page "https://moodle.hku.hk/login/index.php"
+        document.location.href = "https://moodle.hku.hk/login/index.php";
+}
+} catch (error) {
+    // user is logged in
+    // do nothing
+}