add ViewRaw plugin & MiniPopover API (#275)

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

src/api/MessagePopover.ts

@@ -0,0 +1,69 @@
+/*
+ * 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 Logger from "@utils/Logger";
+import { Channel, Message } from "discord-types/general";
+import type { MouseEventHandler } from "react";
+
+const logger = new Logger("MessagePopover");
+
+export interface ButtonItem {
+    key?: string,
+    label: string,
+    icon: React.ComponentType<any>,
+    message: Message,
+    channel: Channel,
+    onClick?: MouseEventHandler<HTMLButtonElement>,
+    onContextMenu?: MouseEventHandler<HTMLButtonElement>;
+}
+
+export type getButtonItem = (message: Message) => ButtonItem | null;
+
+export const buttons = new Map<string, getButtonItem>();
+
+export function addButton(
+    identifier: string,
+    item: getButtonItem,
+) {
+    buttons.set(identifier, item);
+}
+
+export function removeButton(identifier: string) {
+    buttons.delete(identifier);
+}
+
+export function _buildPopoverElements(
+    msg: Message,
+    makeButton: (item: ButtonItem) => React.ComponentType
+) {
+    const items = [] as React.ComponentType[];
+
+    for (const [identifier, getItem] of buttons.entries()) {
+        try {
+            const item = getItem(msg);
+            if (item) {
+                item.key ??= identifier;
+                items.push(makeButton(item));
+            }
+        } catch (err) {
+            logger.error(`[${identifier}]`, err);
+        }
+    }
+
+    return items;
+}