Multipage drag and drop undo fix

src/main/resources/static/js/multitool/DragDropManager.js

@@ -114,13 +114,15 @@ class DragDropManager {
       } else {
         this.selectedPageElements.forEach((pageEl) => {
           pageEl.classList.remove('drag-manager_dragging');
+        });
 
-          if (this.hoveredEl === this.endInsertionElement) {
-            this.movePageTo(pageEl);
-          } else {
-            this.movePageTo(pageEl, this.hoveredEl);
-          }
+        this.movePageTo(
+          this.selectedPageElements,
+          this.hoveredEl === this.endInsertionElement
+            ? null
+            : this.hoveredEl);
 
+        this.selectedPageElements.forEach((pageEl) => {
           // Handle timeout for the current element
           this.handleTimeoutForElement(pageEl);
         });

src/main/resources/static/js/multitool/PdfContainer.js

@@ -6,6 +6,7 @@ import { UndoManager } from './UndoManager.js';
 import { PageBreakCommand } from './commands/page-break.js';
 import { AddFilesCommand } from './commands/add-page.js';
 import { DecryptFile } from '../DecryptFiles.js';
+import { CommandSequence } from './commands/commands-sequence.js';
 
 class PdfContainer {
   fileName;
@@ -109,9 +110,33 @@ class PdfContainer {
     downloadBtn.disabled = true;
   }
 
-  movePageTo(startElement, endElement, scrollTo = false) {
+  movePagesTo(startElements, endElement, scrollTo = false) {
+    let commands = [];
+    startElements.forEach((page) => {
+      let command = new MovePageCommand(
+        page,
+        endElement,
+        this.pagesContainer,
+        this.pagesContainerWrapper,
+        scrollTo
+      )
+      command.execute();
+      commands.push(command);
+    })
+
+    let commandSequence = new CommandSequence(commands);
+    this.undoManager.pushUndoClearRedo(commandSequence);
+    return commandSequence;
+  }
+
+  movePageTo(startElements, endElement, scrollTo = false) {
+
+    if (Array.isArray(startElements)){
+      return this.movePagesTo(startElements, endElement, scrollTo = false);
+    }
+
     let movePageCommand = new MovePageCommand(
-      startElement,
+      startElements,
       endElement,
       this.pagesContainer,
       this.pagesContainerWrapper,

src/main/resources/static/js/multitool/commands/commands-sequence.js

@@ -0,0 +1,20 @@
+import {Command} from './command.js';
+
+export class CommandSequence extends Command {
+  constructor(commands) {
+    super();
+    this.commands = commands;
+
+  }
+  execute() {
+   this.commands.forEach((command) => command.execute())
+  }
+
+  undo() {
+   this.commands.slice().reverse().forEach((command) => command.undo())
+  }
+
+  redo() {
+    this.execute();
+  }
+}