Desktop: Multiple window support (#11181)

Co-authored-by: Laurent Cozic <laurent22@users.noreply.github.com>

packages/app-desktop/gui/WindowCommandsAndDialogs/commands/duplicateNote.ts

@@ -0,0 +1,24 @@
+import { CommandRuntime, CommandDeclaration, CommandContext } from '@joplin/lib/services/CommandService';
+import { _ } from '@joplin/lib/locale';
+import Note from '@joplin/lib/models/Note';
+
+export const declaration: CommandDeclaration = {
+	name: 'duplicateNote',
+	label: () => _('Duplicate'),
+};
+
+export const runtime = (): CommandRuntime => {
+	return {
+		execute: async (context: CommandContext, noteIds: string[] = null) => {
+			if (noteIds === null) noteIds = context.state.selectedNoteIds;
+
+			for (let i = 0; i < noteIds.length; i++) {
+				const note = await Note.load(noteIds[i]);
+				await Note.duplicate(noteIds[i], {
+					uniqueTitle: _('%s - Copy', note.title),
+				});
+			}
+		},
+		enabledCondition: '!noteIsReadOnly',
+	};
+};