feat(plugin): PreviewMessage (#1607)

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

src/plugins/previewMessage.tsx

@@ -0,0 +1,83 @@
+/*
+ * 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 { sendBotMessage } from "@api/Commands";
+import ErrorBoundary from "@components/ErrorBoundary";
+import { Devs } from "@utils/constants";
+import definePlugin from "@utils/types";
+import { Button, ButtonLooks, ButtonWrapperClasses, DraftStore, DraftType, SelectedChannelStore, Tooltip, UserStore } from "@webpack/common";
+
+interface Props {
+    type: {
+        analyticsName: string;
+    };
+}
+
+const getDraft = (channelId: string) => DraftStore.getDraft(channelId, DraftType.ChannelMessage);
+
+export function PreviewButton(chatBoxProps: Props) {
+    if (chatBoxProps.type.analyticsName !== "normal") return null;
+    const channelId = SelectedChannelStore.getChannelId();
+    const draft = getDraft(channelId);
+
+    if (!draft) return null;
+
+    return (
+        <Tooltip text="Preview Message">
+            {tooltipProps => (
+                <Button
+                    {...tooltipProps}
+                    onClick={() =>
+                        sendBotMessage(
+                            channelId,
+                            {
+                                content: getDraft(channelId),
+                                author: UserStore.getCurrentUser()
+                            }
+                        )}
+                    size=""
+                    look={ButtonLooks.BLANK}
+                    innerClassName={ButtonWrapperClasses.button}
+                    style={{ padding: "0 2px", height: "100%" }}
+                >
+                    <div className={ButtonWrapperClasses.buttonWrapper}>
+                        <img width={24} height={24} src="https://discord.com/assets/4c5a77a89716352686f590a6f014770c.svg" />
+                    </div>
+                </Button>
+            )}
+        </Tooltip>
+    );
+
+}
+
+export default definePlugin({
+    name: "PreviewMessage",
+    description: "Lets you preview your message before sending it",
+    authors: [Devs.Aria],
+    patches: [
+        {
+            find: ".activeCommandOption",
+            replacement: {
+                match: /(.)\.push.{1,30}disabled:(\i),.{1,20}\},"gift"\)\)/,
+                replace: "$&;try{$2||$1.unshift($self.previewIcon(arguments[0]))}catch{}",
+            }
+        },
+    ],
+
+    previewIcon: ErrorBoundary.wrap(PreviewButton, { noop: true }),
+});

src/webpack/common/stores.ts

@@ -27,6 +27,13 @@ export const Flux: t.Flux = findByPropsLazy("connectStores");
 
 export type GenericStore = t.FluxStore & Record<string, any>;
 
+export enum DraftType {
+    ChannelMessage = 0,
+    ThreadSettings = 1,
+    FirstThreadMessage = 2,
+    ApplicationLauncherCommand = 3
+}
+
 export let MessageStore: Omit<Stores.MessageStore, "getMessages"> & {
     getMessages(chanId: string): any;
 };
@@ -52,6 +59,7 @@ export let RelationshipStore: Stores.RelationshipStore & t.FluxStore & {
 
 export let EmojiStore: t.EmojiStore;
 export let WindowStore: t.WindowStore;
+export let DraftStore: t.DraftStore;
 
 export const MaskedLinkStore = mapMangledModuleLazy('"MaskedLinkStore"', {
     openUntrustedLink: filters.byCode(".apply(this,arguments)")
@@ -76,6 +84,7 @@ export const useStateFromStores: <T>(
 ) => T
     = findByCodeLazy("useStateFromStores");
 
+waitForStore("DraftStore", s => DraftStore = s);
 waitForStore("UserStore", s => UserStore = s);
 waitForStore("ChannelStore", m => ChannelStore = m);
 waitForStore("SelectedChannelStore", m => SelectedChannelStore = m);

src/webpack/common/types/stores.d.ts

@@ -16,6 +16,7 @@
  * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 */
 
+import { DraftType } from "@webpack/common";
 import { Channel } from "discord-types/general";
 
 import { FluxDispatcher, FluxEvents } from "./utils";
@@ -148,3 +149,26 @@ export class EmojiStore extends FluxStore {
         get favoriteEmojisWithoutFetchingLatest(): Emoji[];
     };
 }
+
+export interface DraftObject {
+    channelId: string;
+    timestamp: number;
+    draft: string;
+}
+
+interface DraftState {
+    [userId: string]: {
+        [channelId: string]: {
+            [key in DraftType]?: Omit<DraftObject, "channelId">;
+        } | undefined;
+    } | undefined;
+}
+
+
+export class DraftStore extends FluxStore {
+    getDraft(channelId: string, type: DraftType): string;
+    getRecentlyEditedDrafts(type: DraftType): DraftObject[];
+    getState(): DraftState;
+    getThreadDraftWithParentMessageId?(arg: any): any;
+    getThreadSettings(channelId: string): any | null;
+}