Add script to revert changes

package.json

@@ -4,7 +4,8 @@
   "description": "A program that optimises the boot of Minecraft Dungeons by removing the unnecessary loading videos.",
   "main": "distrib/main.js",
   "scripts": {
-    "test": "node ."
+    "remove-loading-videos": "node .",
+    "revert-changes": "node distrib/scripts/revert-changes.js"
   },
   "keywords": [
     "minecraft",

src/scripts/revert-changes.ts

@@ -0,0 +1,31 @@
+import { readFileSync, rmSync, writeFileSync } from "fs";
+import { archivedVideoEnding, blankSplashContent, moviesFolder, splashesToRemove } from "../constants";
+
+export function revertChanges() {
+    for (const loadingVideo of splashesToRemove) {
+        const fullFilePath = moviesFolder + "/" + loadingVideo;
+
+        // Save content to new file, in case the user wants to re-add the loading videos
+        const split = fullFilePath.split(".");
+        split[1] = archivedVideoEnding;
+
+        let archivedVideoFilePath = split.join("")
+        archivedVideoFilePath += ".mp4";
+
+        let content: Buffer;
+
+        try {
+            content = readFileSync(archivedVideoFilePath);
+        } catch (error) {
+            console.log("Could not read file " + archivedVideoFilePath + ".");
+            continue;
+        }
+
+        console.log("Reverting deletion of video " + fullFilePath + ".");
+
+        writeFileSync(fullFilePath, content);
+        rmSync(archivedVideoFilePath);
+    }
+}
+
+revertChanges();