feat(plugins): add FixInbox plugin (#552)

src/plugins/FixInbox.tsx

@@ -0,0 +1,56 @@
+/*
+ * Vencord, a modification for Discord's desktop app
+ * Copyright (c) 2023 Vendicated and contributors
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+*/
+
+import { Devs } from "@utils/constants";
+import definePlugin from "@utils/types";
+import { Forms } from "@webpack/common";
+
+export default definePlugin({
+    name: "FixInbox",
+    description: "Fixes the Unreads Inbox from crashing Discord when you're in lots of guilds.",
+    authors: [Devs.Megu],
+
+    patches: [{
+        find: "INBOX_OPEN:function",
+        replacement: {
+            // This function normally dispatches a subscribe event to every guild.
+            // this is badbadbadbadbad so we just get rid of it.
+            match: /INBOX_OPEN:function.+?\{/,
+            replace: "$&return true;"
+        }
+    }],
+
+    settingsAboutComponent() {
+        return (
+            <Forms.FormSection>
+                <Forms.FormTitle tag="h3">What's the problem?</Forms.FormTitle>
+                <Forms.FormText style={{ marginBottom: 8 }}>
+                    By default, Discord emits a GUILD_SUBSCRIPTIONS event for every guild you're in.
+                    When you're in a lot of guilds, this can cause the gateway to ratelimit you.
+                    This causes the client to crash and get stuck in an infinite ratelimit loop as it tries to reconnect.
+                </Forms.FormText>
+
+                <Forms.FormTitle tag="h3">How does it work?</Forms.FormTitle>
+                <Forms.FormText>
+                    This plugin works by stopping the client from sending GUILD_SUBSCRIPTIONS events to the gateway when you open the unreads inbox.
+                    This means that not all unreads will be shown, instead only already-subscribed guilds' unreads will be shown, but your client won't crash anymore.
+                </Forms.FormText>
+            </Forms.FormSection>
+        );
+    }
+});