feat: Crash Handler (#531)

Co-authored-by: Ven <vendicated@riseup.net>

src/api/settings.ts

@@ -92,7 +92,7 @@ function makeProxy(settings: any, root = settings, path = ""): Settings {
                 // Return empty for plugins with no settings
                 if (path === "plugins" && p in plugins)
                     return target[p] = makeProxy({
-                        enabled: plugins[p].required ?? false
+                        enabled: plugins[p].required ?? plugins[p].enabledByDefault ?? false
                     }, root, `plugins.${p}`);
 
                 // Since the property is not set, check if this is a plugin's setting and if so, try to resolve

src/components/handleComponentFailed.ts

@@ -16,29 +16,12 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
-import { isOutdated, rebuild, update } from "@utils/updater";
+import { maybePromptToUpdate } from "@utils/updater";
 
-export async function handleComponentFailed() {
-    if (isOutdated) {
-        setImmediate(async () => {
-            const wantsUpdate = confirm(
+export function handleComponentFailed() {
+    maybePromptToUpdate(
         "Uh Oh! Failed to render this Page." +
         " However, there is an update available that might fix it." +
         " Would you like to update and restart now?"
     );
-            if (wantsUpdate) {
-                try {
-                    await update();
-                    await rebuild();
-                    if (IS_WEB)
-                        location.reload();
-                    else
-                        DiscordNative.app.relaunch();
-                } catch (e) {
-                    console.error(e);
-                    alert("That also failed :( Try updating or reinstalling with the installer!");
-                }
-            }
-        });
-    }
 }

src/plugins/crashHandler.ts

@@ -0,0 +1,134 @@
+/*
+ * Vencord, a modification for Discord's desktop app
+ * Copyright (c) 2022 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 { showNotification } from "@api/Notifications";
+import { definePluginSettings } from "@api/settings";
+import { Devs } from "@utils/constants";
+import Logger from "@utils/Logger";
+import { closeAllModals } from "@utils/modal";
+import definePlugin, { OptionType } from "@utils/types";
+import { maybePromptToUpdate } from "@utils/updater";
+import { FluxDispatcher, NavigationRouter } from "@webpack/common";
+import type { ReactElement } from "react";
+
+const CrashHandlerLogger = new Logger("CrashHandler");
+
+const settings = definePluginSettings({
+    attemptToPreventCrashes: {
+        type: OptionType.BOOLEAN,
+        description: "Whether to attempt to prevent Discord crashes.",
+        default: true
+    },
+    attemptToNavigateToHome: {
+        type: OptionType.BOOLEAN,
+        description: "Whether to attempt to navigate to the home when preventing Discord crashes.",
+        default: false
+    }
+});
+
+export default definePlugin({
+    name: "CrashHandler",
+    description: "Utility plugin for handling and possibly recovering from Crashes without a restart",
+    authors: [Devs.Nuckyz],
+    enabledByDefault: true,
+
+    popAllModals: undefined as (() => void) | undefined,
+
+    settings,
+
+    patches: [
+        {
+            find: ".Messages.ERRORS_UNEXPECTED_CRASH",
+            replacement: {
+                match: /(?=this\.setState\()/,
+                replace: "$self.handleCrash(this)||"
+            }
+        },
+        {
+            find: 'dispatch({type:"MODAL_POP_ALL"})',
+            replacement: {
+                match: /(?<=(?<popAll>\i)=function\(\){\(0,\i\.\i\)\(\);\i\.\i\.dispatch\({type:"MODAL_POP_ALL"}\).+};)/,
+                replace: "$self.popAllModals=$<popAll>;"
+            }
+        }
+    ],
+
+    handleCrash(_this: ReactElement & { forceUpdate: () => void; }) {
+        try {
+            maybePromptToUpdate("Uh oh, Discord has just crashed... but good news, there is a Vencord update available that might fix this issue! Would you like to update now?", true);
+
+            if (settings.store.attemptToPreventCrashes) {
+                this.handlePreventCrash(_this);
+                return true;
+            }
+
+            return false;
+        } catch (err) {
+            CrashHandlerLogger.error("Failed to handle crash", err);
+        }
+    },
+
+    handlePreventCrash(_this: ReactElement & { forceUpdate: () => void; }) {
+        try {
+            showNotification({
+                color: "#eed202",
+                title: "Discord has crashed!",
+                body: "Attempting to recover...",
+            });
+        } catch { }
+
+        try {
+            FluxDispatcher.dispatch({ type: "CONTEXT_MENU_CLOSE" });
+        } catch (err) {
+            CrashHandlerLogger.debug("Failed to close open context menu.", err);
+        }
+        try {
+            this.popAllModals?.();
+        } catch (err) {
+            CrashHandlerLogger.debug("Failed to close old modals.", err);
+        }
+        try {
+            closeAllModals();
+        } catch (err) {
+            CrashHandlerLogger.debug("Failed to close all open modals.", err);
+        }
+        try {
+            FluxDispatcher.dispatch({ type: "USER_PROFILE_MODAL_CLOSE" });
+        } catch (err) {
+            CrashHandlerLogger.debug("Failed to close user popout.", err);
+        }
+        try {
+            FluxDispatcher.dispatch({ type: "LAYER_POP_ALL" });
+        } catch (err) {
+            CrashHandlerLogger.debug("Failed to pop all layers.", err);
+        }
+        if (settings.store.attemptToNavigateToHome) {
+            try {
+                NavigationRouter.transitionTo("/channels/@me");
+            } catch (err) {
+                CrashHandlerLogger.debug("Failed to navigate to home", err);
+            }
+        }
+
+        try {
+            _this.forceUpdate();
+        } catch (err) {
+            CrashHandlerLogger.debug("Failed to update crash handler component.", err);
+        }
+    }
+});

src/plugins/noF1.ts

@@ -16,9 +16,11 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
+import { migratePluginSettings } from "@api/settings";
 import { Devs } from "@utils/constants";
 import definePlugin from "@utils/types";
 
+migratePluginSettings("NoF1", "No F1");
 export default definePlugin({
     name: "NoF1",
     description: "Disables F1 help bind.",

src/plugins/noRPC.ts

@@ -16,9 +16,11 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
+import { migratePluginSettings } from "@api/settings";
 import { Devs } from "@utils/constants";
 import definePlugin from "@utils/types";
 
+migratePluginSettings("NoRPC", "No RPC");
 export default definePlugin({
     name: "NoRPC",
     description: "Disables Discord's RPC server.",

src/utils/modal.tsx

@@ -117,6 +117,7 @@ const ModalAPI = mapMangledModuleLazy("onCloseRequest:null!=", {
     openModal: filters.byCode("onCloseRequest:null!="),
     closeModal: filters.byCode("onCloseCallback&&"),
     openModalLazy: m => m?.length === 1 && filters.byCode(".apply(this,arguments)")(m),
+    closeAllModals: filters.byCode(".value.key,")
 });
 
 /**
@@ -142,3 +143,10 @@ export function openModal(render: RenderFunction, options?: ModalOptions, contex
 export function closeModal(modalKey: string, contextKey?: string): void {
     return ModalAPI.closeModal(modalKey, contextKey);
 }
+
+/**
+ * Close all open modals
+ */
+export function closeAllModals(): void {
+    return ModalAPI.closeAllModals();
+}

src/utils/types.ts

@@ -75,6 +75,10 @@ export interface PluginDef {
      * Whether this plugin is required and forcefully enabled
      */
     required?: boolean;
+    /**
+     * Whether this plugin should be enabled by default, but can be disabled
+     */
+    enabledByDefault?: boolean;
     /**
      * Set this if your plugin only works on Browser or Desktop, not both
      */

src/utils/updater.ts

@@ -77,3 +77,25 @@ export async function rebuild() {
     return oldHashes["patcher.js"] !== newHashes["patcher.js"] ||
         oldHashes["preload.js"] !== newHashes["preload.js"];
 }
+
+export async function maybePromptToUpdate(confirmMessage: string, checkForDev = false) {
+    if (IS_WEB) return;
+    if (checkForDev && IS_DEV) return;
+
+    try {
+        const isOutdated = await checkForUpdates();
+        if (isOutdated) {
+            const wantsUpdate = confirm(confirmMessage);
+            if (wantsUpdate && isNewer) return alert("Your local copy has more recent commits. Please stash or reset them.");
+            if (wantsUpdate) {
+                await update();
+                const needFullRestart = await rebuild();
+                if (needFullRestart) DiscordNative.app.relaunch();
+                else location.reload();
+            }
+        }
+    } catch (err) {
+        UpdateLogger.error(err);
+        alert("That also failed :( Try updating or re-installing with the installer!");
+    }
+}