[Stable8.5] Port time machine to arcade stable

localtypings/pxtarget.d.ts

@@ -481,6 +481,10 @@ declare namespace pxt {
         songEditor?: boolean; // enable the song asset type and field editor
         multiplayer?: boolean; // enable multiplayer features
         shareToKiosk?: boolean; // enable sharing to a kiosk
+        timeMachine?: boolean;
+        timeMachineQueryParams?: string[]; // An array of query params to pass to timemachine iframe embed
+        timeMachineDiffInterval?: number; // An interval in milliseconds at which to take diffs to store in project history. Defaults to 5 minutes
+        timeMachineSnapshotInterval?: number; // An interval in milliseconds at which to take full project snapshots in project history. Defaults to 15 minutes
     }
 
     interface DownloadDialogTheme {

package.json

@@ -69,11 +69,13 @@
     "@fortawesome/fontawesome-free": "^5.15.4",
     "@microsoft/applicationinsights-web": "^2.8.11",
     "@microsoft/immersive-reader-sdk": "1.1.0",
+    "@types/diff-match-patch": "^1.0.36",
     "@zip.js/zip.js": "2.4.20",
     "browserify": "16.2.3",
     "chai": "^3.5.0",
     "cssnano": "4.1.10",
     "dashjs": "^4.4.0",
+    "diff-match-patch": "^1.0.5",
     "dompurify": "2.0.17",
     "faye-websocket": "0.11.1",
     "karma": "6.3.10",

pxteditor/editor.ts

@@ -357,6 +357,7 @@ namespace pxt.editor {
         showLanguagePicker(): void;
         showShareDialog(title?: string, forMultiplayer?: boolean): void;
         showAboutDialog(): void;
+        showTurnBackTimeDialogAsync(): Promise<void>;
 
         showLoginDialog(continuationHash?: string): void;
         showProfileDialog(location?: string): void;