implement visitor to change ids in links

apps/server/src/modules/board/index.ts

@@ -4,3 +4,4 @@ export * from './service/card.service';
 export * from './service/column-board.service';
 export * from './service/column.service';
 export * from './service/content-element.service';
+export * from './service/column-board-copy.service';

apps/server/src/modules/board/service/board-do-copy-service/swap-internal-links.visitor.spec.ts

@@ -0,0 +1,130 @@
+import { LinkElement } from '@shared/domain/domainobject';
+import { EntityId } from '@shared/domain/types';
+import {
+	cardFactory,
+	columnBoardFactory,
+	columnFactory,
+	externalToolElementFactory,
+	fileElementFactory,
+	linkElementFactory,
+	richTextElementFactory,
+	submissionContainerElementFactory,
+	submissionItemFactory,
+} from '@shared/testing';
+import { drawingElementFactory } from '@shared/testing/factory/domainobject/board/drawing-element.do.factory';
+import { ObjectId } from 'bson';
+import { SwapInternalLinksVisitor } from './swap-internal-links.visitor';
+
+describe('swap internal links visitor', () => {
+	it('should keep link unchanged', () => {
+		const map = new Map<EntityId, EntityId>();
+		const linkElement = linkElementFactory.build({ url: 'testurl.dev' });
+		const visitor = new SwapInternalLinksVisitor(map);
+
+		linkElement.accept(visitor);
+
+		expect(linkElement.url).toEqual('testurl.dev');
+	});
+
+	const setupIdPair = () => {
+		const originalId = new ObjectId().toString();
+		const newId = new ObjectId().toString();
+		const value = {
+			originalId,
+			newId,
+			originalUrl: `testurl.dev/${originalId}`,
+			expectedUrl: `testurl.dev/${newId}`,
+		};
+		return value;
+	};
+
+	const buildIdMap = (pairs: { originalId: string; newId: string }[]) => {
+		const map = new Map<EntityId, EntityId>();
+		pairs.forEach((pair) => {
+			map.set(pair.originalId, pair.newId);
+		});
+		return map;
+	};
+
+	const buildBoardContaining = (linkelelements: LinkElement[]) => {
+		const cardContainingLinks = cardFactory.build({ children: linkelelements });
+		const submissionContainer = submissionContainerElementFactory.build({
+			children: [
+				submissionItemFactory.build({
+					children: [richTextElementFactory.build()],
+				}),
+			],
+		});
+		const cardContainingOthers = cardFactory.build({
+			children: [
+				richTextElementFactory.build(),
+				fileElementFactory.build(),
+				submissionContainer,
+				drawingElementFactory.build(),
+				externalToolElementFactory.build(),
+			],
+		});
+		const column = columnFactory.build({
+			children: [cardContainingLinks, cardContainingOthers],
+		});
+		const columnBoard = columnBoardFactory.build({
+			children: [column],
+		});
+		return columnBoard;
+	};
+
+	describe('when a single id is matched', () => {
+		const setupWithIdPair = () => {
+			const pair = setupIdPair();
+			const map = buildIdMap([pair]);
+			const visitor = new SwapInternalLinksVisitor(map);
+
+			return { pair, visitor };
+		};
+
+		it('should change ids in link', () => {
+			const { pair, visitor } = setupWithIdPair();
+			const linkElement = linkElementFactory.build({ url: pair.originalUrl });
+
+			linkElement.accept(visitor);
+
+			expect(linkElement.url).toEqual(pair.expectedUrl);
+		});
+
+		it('should change ids in multiple matching links', () => {
+			const { pair, visitor } = setupWithIdPair();
+			const firstLinkElement = linkElementFactory.build({ url: pair.originalUrl });
+			const secondLinkElement = linkElementFactory.build({ url: pair.originalUrl });
+			const root = buildBoardContaining([firstLinkElement, secondLinkElement]);
+
+			root.accept(visitor);
+
+			expect(firstLinkElement.url).toEqual(pair.expectedUrl);
+			expect(secondLinkElement.url).toEqual(pair.expectedUrl);
+		});
+	});
+
+	describe('when multiple different ids are matched', () => {
+		const setupWithMultipleIds = () => {
+			const pairs = [setupIdPair(), setupIdPair()];
+
+			const idMap = buildIdMap(pairs);
+			const visitor = new SwapInternalLinksVisitor(idMap);
+
+			return { visitor, pairs };
+		};
+
+		const buildLinkElementsWithUrls = (urls: string[]) => urls.map((url) => linkElementFactory.build({ url }));
+
+		it('should change multiple ids in different links', () => {
+			const { visitor, pairs } = setupWithMultipleIds();
+			const linkElements = buildLinkElementsWithUrls(pairs.map((pair) => pair.originalUrl));
+			const root = buildBoardContaining(linkElements);
+
+			root.accept(visitor);
+
+			expect(linkElements[0].url).toEqual(pairs[0].expectedUrl);
+			expect(linkElements[1].url).toEqual(pairs[1].expectedUrl);
+		});
+	});
+});

apps/server/src/modules/board/service/board-do-copy-service/swap-internal-links.visitor.ts

@@ -0,0 +1,64 @@
+import {
+	AnyBoardDo,
+	BoardCompositeVisitor,
+	Card,
+	Column,
+	ColumnBoard,
+	LinkElement,
+	SubmissionContainerElement,
+	SubmissionItem,
+} from '@shared/domain/domainobject';
+import { DrawingElement } from '@shared/domain/domainobject/board/drawing-element.do';
+import { EntityId } from '@shared/domain/types';
+
+export class SwapInternalLinksVisitor implements BoardCompositeVisitor {
+	constructor(private readonly idMap: Map<EntityId, EntityId>) {}
+
+	visitDrawingElement(drawingElement: DrawingElement): void {
+		this.visitChildrenOf(drawingElement);
+	}
+
+	visitCard(card: Card): void {
+		this.visitChildrenOf(card);
+	}
+
+	visitColumn(column: Column): void {
+		this.visitChildrenOf(column);
+	}
+
+	visitColumnBoard(columnBoard: ColumnBoard): void {
+		this.visitChildrenOf(columnBoard);
+	}
+
+	visitExternalToolElement(): void {
+		this.doNothing();
+	}
+
+	visitFileElement(): void {
+		this.doNothing();
+	}
+
+	visitLinkElement(linkElement: LinkElement): void {
+		this.idMap.forEach((value, key) => {
+			linkElement.url = linkElement.url.replace(key, value);
+		});
+	}
+
+	visitRichTextElement(): void {
+		this.doNothing();
+	}
+
+	visitSubmissionContainerElement(submissionContainerElement: SubmissionContainerElement): void {
+		this.visitChildrenOf(submissionContainerElement);
+	}
+
+	visitSubmissionItem(submissionItem: SubmissionItem): void {
+		this.visitChildrenOf(submissionItem);
+	}
+
+	private visitChildrenOf(boardDo: AnyBoardDo) {
+		boardDo.children.forEach((child) => child.accept(this));
+	}
+
+	private doNothing() {}
+}

apps/server/src/modules/board/service/column-board-copy.service.spec.ts

@@ -3,8 +3,19 @@ import { CopyElementType, CopyStatus, CopyStatusEnum } from '@modules/copy-helpe
 import { UserService } from '@modules/user';
 import { Test, TestingModule } from '@nestjs/testing';
 import { BoardExternalReferenceType, ColumnBoard, UserDO } from '@shared/domain/domainobject';
+import { EntityId } from '@shared/domain/types';
 import { CourseRepo } from '@shared/repo';
-import { columnBoardFactory, courseFactory, schoolFactory, setupEntities, userFactory } from '@shared/testing';
+import {
+	cardFactory,
+	columnBoardFactory,
+	columnFactory,
+	courseFactory,
+	linkElementFactory,
+	schoolFactory,
+	setupEntities,
+	userFactory,
+} from '@shared/testing';
+import { ObjectId } from 'bson';
 import { BoardDoRepo } from '../repo';
 import {
 	BoardDoCopyService,
@@ -168,4 +179,53 @@ describe('column board copy service', () => {
 			expect(result).toEqual(expectedCopyStatus);
 		});
 	});
+
+	describe('when changing linked ids', () => {
+		const setup = () => {
+			const linkedIdBefore = new ObjectId().toString();
+			const linkElement = linkElementFactory.build({
+				url: `someurl/${linkedIdBefore}`,
+			});
+			const board = columnBoardFactory.build({
+				children: [
+					columnFactory.build({
+						children: [
+							cardFactory.build({
+								children: [linkElement],
+							}),
+						],
+					}),
+				],
+			});
+			boardRepo.findById.mockResolvedValue(board);
+
+			return { board, linkElement, linkedIdBefore };
+		};
+
+		it('should get board', async () => {
+			const { board } = setup();
+
+			await service.swapLinkedIds(board.id, new Map<EntityId, EntityId>());
+
+			expect(boardRepo.findById).toHaveBeenCalledWith(board.id);
+		});
+
+		it('should update links in board', async () => {
+			const { board, linkElement, linkedIdBefore } = setup();
+			const expectedId = new ObjectId().toString();
+			const map = new Map<EntityId, EntityId>().set(linkedIdBefore, expectedId);
+
+			await service.swapLinkedIds(board.id, map);
+
+			expect(linkElement.url).toEqual(`someurl/${expectedId}`);
+		});
+
+		it('should persist updates', async () => {
+			const { board } = setup();
+
+			await service.swapLinkedIds(board.id, new Map<EntityId, EntityId>());
+
+			expect(boardRepo.save).toHaveBeenCalledWith(board);
+		});
+	});
 });

apps/server/src/modules/board/service/column-board-copy.service.ts

@@ -11,6 +11,7 @@ import { EntityId } from '@shared/domain/types';
 import { CourseRepo } from '@shared/repo';
 import { BoardDoRepo } from '../repo';
 import { BoardDoCopyService, SchoolSpecificFileCopyServiceFactory } from './board-do-copy-service';
+import { SwapInternalLinksVisitor } from './board-do-copy-service/swap-internal-links.visitor';
 
 @Injectable()
 export class ColumnBoardCopyService {
@@ -54,4 +55,16 @@ export class ColumnBoardCopyService {
 
 		return copyStatus;
 	}
+
+	public async swapLinkedIds(boardId: EntityId, idMap: Map<EntityId, EntityId>) {
+		const board = await this.boardDoRepo.findById(boardId);
+
+		const visitor = new SwapInternalLinksVisitor(idMap);
+
+		board.accept(visitor);
+
+		await this.boardDoRepo.save(board);
+
+		return board;
+	}
 }