Use

web/apps/photos/src/services/collectionService.ts

@@ -1,4 +1,5 @@
 import type { User } from "ente-accounts/services/user";
+import { isDevBuild } from "ente-base/env";
 import log from "ente-base/log";
 import { apiURL } from "ente-base/origins";
 import { groupFilesByCollectionID, sortFiles } from "ente-gallery/utils/file";
@@ -7,6 +8,7 @@ import {
     addToFavorites,
     createUncategorizedCollection,
     moveFromCollection,
+    removeFromCollection2,
     removeNonUserFilesFromCollection,
     savedUserFavoritesCollection,
 } from "ente-new/photos/services/collection";
@@ -40,6 +42,10 @@ export const removeFromCollection = async (
     collectionID: number,
     toRemoveFiles: EnteFile[],
 ) => {
+    // TODO(RE):
+    if (isDevBuild && process.env.ENTE_WIP_MOVE)
+        return removeFromCollection2(collectionID, toRemoveFiles);
+
     try {
         const user: User = getData("user");
         const nonUserFiles = [];

web/packages/new/photos/services/collection.ts

@@ -701,10 +701,28 @@ export const deleteFromTrash = async (fileIDs: number[]) =>
  *
  * See: [Note: Deleting a collection].
  */
-export const removeFromCollection = (
+export const removeFromCollection2 = async (
     collectionID: number,
     files: EnteFile[],
-) => {};
+) => {
+    const userID = ensureLocalUser().id;
+    const [userFiles, nonUserFiles] = splitByPredicate(
+        files,
+        (f) => f.ownerID == userID,
+    );
+    if (userFiles.length) {
+        await moveUserFilesToUncategorizedIfSoleCollection(
+            collectionID,
+            userFiles,
+        );
+    }
+    if (nonUserFiles.length) {
+        await removeNonUserFilesFromCollection(
+            collectionID,
+            nonUserFiles.map((f) => f.id),
+        );
+    }
+};
 
 /**
  * Move the given user owned files whose only user owned instance is in the