From 809943edcc01fc3c81ec59ebdfabfb7f8669656a Mon Sep 17 00:00:00 2001
From: Bauke <me@bauke.xyz>
Date: Sat, 15 Jul 2023 15:20:05 +0200
Subject: [PATCH] Gate certain features by requiring a logged in user.

---
 source/content-scripts/setup.tsx | 28 ++++++++++++++++++++++------
 source/utilities/exports.ts      |  1 +
 source/utilities/user.ts         |  6 ++++++
 3 files changed, 29 insertions(+), 6 deletions(-)
 create mode 100644 source/utilities/user.ts

diff --git a/source/content-scripts/setup.tsx b/source/content-scripts/setup.tsx
index c933f2c..164b3be 100644
--- a/source/content-scripts/setup.tsx
+++ b/source/content-scripts/setup.tsx
@@ -1,5 +1,10 @@
 import {type JSX, render} from "preact";
-import {extractGroups, initializeGlobals, log} from "../utilities/exports.js";
+import {
+  extractGroups,
+  initializeGlobals,
+  log,
+  userIsLoggedIn,
+} from "../utilities/exports.js";
 import {
   Data,
   Feature,
@@ -36,6 +41,11 @@ async function initialize() {
   const knownGroups = await fromStorage(Data.KnownGroups);
   const userLabels = await fromStorage(Feature.UserLabels);
 
+  const isLoggedIn = userIsLoggedIn();
+  if (!isLoggedIn) {
+    log("User is not logged in, running with limited features enabled.", true);
+  }
+
   // Only when any of the features that uses this data are enabled, try to save
   // the groups.
   if (
@@ -89,7 +99,7 @@ async function initialize() {
     });
   }
 
-  if (enabledFeatures.value.has(Feature.MarkdownToolbar)) {
+  if (enabledFeatures.value.has(Feature.MarkdownToolbar) && isLoggedIn) {
     observerFeatures.push(() => {
       runMarkdownToolbarFeature();
     });
@@ -121,7 +131,7 @@ async function initialize() {
   // Object to hold the active components we are going to render.
   const components: Record<string, JSX.Element | undefined> = {};
 
-  if (enabledFeatures.value.has(Feature.Autocomplete)) {
+  if (enabledFeatures.value.has(Feature.Autocomplete) && isLoggedIn) {
     components.autocomplete = (
       <AutocompleteFeature
         anonymizeUsernamesEnabled={anonymizeUsernamesEnabled}
@@ -135,7 +145,7 @@ async function initialize() {
     components.backToTop = <BackToTopFeature />;
   }
 
-  if (enabledFeatures.value.has(Feature.JumpToNewComment)) {
+  if (enabledFeatures.value.has(Feature.JumpToNewComment) && isLoggedIn) {
     components.jumpToNewComment = <JumpToNewCommentFeature />;
   }
 
@@ -152,11 +162,17 @@ async function initialize() {
     runCommentAnchorFixFeature();
   }
 
-  if (miscEnabled.value.has(MiscellaneousFeature.GroupListSubscribeButtons)) {
+  if (
+    miscEnabled.value.has(MiscellaneousFeature.GroupListSubscribeButtons) &&
+    isLoggedIn
+  ) {
     runGroupListSubscribeButtonFeature();
   }
 
-  if (miscEnabled.value.has(MiscellaneousFeature.TopicInfoIgnore)) {
+  if (
+    miscEnabled.value.has(MiscellaneousFeature.TopicInfoIgnore) &&
+    isLoggedIn
+  ) {
     runTopicInfoIgnore();
   }
 
diff --git a/source/utilities/exports.ts b/source/utilities/exports.ts
index 71f0f37..3294472 100644
--- a/source/utilities/exports.ts
+++ b/source/utilities/exports.ts
@@ -7,4 +7,5 @@ export * from "./logging.js";
 export * from "./query-selectors.js";
 export * from "./report-a-bug.js";
 export * from "./text.js";
+export * from "./user.js";
 export * from "./validators.js";
diff --git a/source/utilities/user.ts b/source/utilities/user.ts
new file mode 100644
index 0000000..dfa4444
--- /dev/null
+++ b/source/utilities/user.ts
@@ -0,0 +1,6 @@
+/**
+ * Checks whether a user is logged in on or not.
+ */
+export function userIsLoggedIn(): boolean {
+  return document.querySelector(".logged-in-user-username") !== null;
+}