feat(plugins): Keep Current Channel plugin (#248)

2 files changed, 108 insertions, 0 deletions

diff --git a/src/plugins/keepCurrentChannel.ts b/src/plugins/keepCurrentChannel.ts
new file mode 100644
index 0000000..395fd76
--- /dev/null
+++ b/src/plugins/keepCurrentChannel.ts
@@ -0,0 +1,99 @@
+/*
+ * 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 { DataStore } from "../api";
+import { Devs } from "../utils/constants";
+import definePlugin from "../utils/types";
+import { ChannelStore, FluxDispatcher, NavigationRouter, SelectedChannelStore, SelectedGuildStore } from "../webpack/common";
+
+export interface LogoutEvent {
+    type: "LOGOUT";
+    isSwitchingAccount: boolean;
+}
+
+interface ChannelSelectEvent {
+    type: "CHANNEL_SELECT";
+    channelId: string | null;
+    guildId: string | null;
+}
+
+interface PreviousChannel {
+    guildId: string | null;
+    channelId: string | null;
+}
+
+
+export default definePlugin({
+    name: "KeepCurrentChannel",
+    description: "Attempt to navigate the channel you were in before switching accounts or loading Discord.",
+    authors: [Devs.Nuckyz],
+
+    isSwitchingAccount: false,
+    previousCache: {} as PreviousChannel,
+
+    attemptToNavigateToChannel(guildId: string | null, channelId: string) {
+        if (!ChannelStore.hasChannel(channelId)) return;
+        NavigationRouter.transitionTo(`/channels/${guildId ?? "@me"}/${channelId}`);
+    },
+
+    onLogout(e: LogoutEvent) {
+        this.isSwitchingAccount = e.isSwitchingAccount;
+    },
+
+    onConnectionOpen() {
+        if (!this.isSwitchingAccount) return;
+        this.isSwitchingAccount = false;
+
+        if (this.previousCache.channelId) this.attemptToNavigateToChannel(this.previousCache.guildId, this.previousCache.channelId);
+    },
+
+    async onChannelSelect({ guildId, channelId }: ChannelSelectEvent) {
+        if (this.isSwitchingAccount) return;
+
+        this.previousCache = {
+            guildId,
+            channelId
+        };
+        await DataStore.set("KeepCurrentChannel_previousData", this.previousCache);
+    },
+
+    async start() {
+        const previousData = await DataStore.get<PreviousChannel>("KeepCurrentChannel_previousData");
+        if (previousData) {
+            this.previousCache = previousData;
+
+            if (this.previousCache.channelId) this.attemptToNavigateToChannel(this.previousCache.guildId, this.previousCache.channelId);
+        } else {
+            this.previousCache = {
+                guildId: SelectedGuildStore.getGuildId(),
+                channelId: SelectedChannelStore.getChannelId() ?? null
+            };
+            await DataStore.set("KeepCurrentChannel_previousData", this.previousCache);
+        }
+
+        FluxDispatcher.subscribe("LOGOUT", this.onLogout.bind(this));
+        FluxDispatcher.subscribe("CONNECTION_OPEN", this.onConnectionOpen.bind(this));
+        FluxDispatcher.subscribe("CHANNEL_SELECT", this.onChannelSelect.bind(this));
+    },
+
+    stop() {
+        FluxDispatcher.unsubscribe("LOGOUT", this.onLogout);
+        FluxDispatcher.unsubscribe("CONNECTION_OPEN", this.onConnectionOpen);
+        FluxDispatcher.unsubscribe("CHANNEL_SELECT", this.onChannelSelect);
+    }
+});
diff --git a/src/webpack/common.tsx b/src/webpack/common.tsx
index c649c19..fa6bb0e 100644
--- a/src/webpack/common.tsx
+++ b/src/webpack/common.tsx
@@ -41,6 +41,7 @@ export const PresenceStore = lazyWebpack(filters.byProps("setCurrentUserOnConnec
 export let GuildStore: Stores.GuildStore;
 export let UserStore: Stores.UserStore;
 export let SelectedChannelStore: Stores.SelectedChannelStore;
+export let SelectedGuildStore: any;
 export let ChannelStore: Stores.ChannelStore;
 
 export const Forms = {} as {
@@ -125,6 +126,13 @@ export const Clipboard = mapMangledModuleLazy('document.queryCommandEnabled("cop
     SUPPORTS_COPY: x => typeof x === "boolean",
 });
 
+export const NavigationRouter = mapMangledModuleLazy("Transitioning to external path", {
+    transitionTo: filters.byCode("Transitioning to external path"),
+    transitionToGuild: filters.byCode("transitionToGuild"),
+    goBack: filters.byCode("goBack()"),
+    goForward: filters.byCode("goForward()"),
+});
+
 waitFor("useState", m => React = m);
 
 waitFor(["dispatch", "subscribe"], m => {
@@ -139,6 +147,7 @@ waitFor(["dispatch", "subscribe"], m => {
 waitFor(["getCurrentUser", "initialize"], m => UserStore = m);
 waitFor("getSortedPrivateChannels", m => ChannelStore = m);
 waitFor("getCurrentlySelectedChannelId", m => SelectedChannelStore = m);
+waitFor("getLastSelectedGuildId", m => SelectedGuildStore = m);
 waitFor("getGuildCount", m => GuildStore = m);
 
 waitFor(["Hovers", "Looks", "Sizes"], m => Button = m);