@fontoxml/fontoxml-development-tools/src/modules/editor/dev-cms/connectors-cms-standard/configureDocumentCompareRouteHandler.js

Development tools for Fonto.

import asyncRouteWithLockCleanupHandler from '../asyncRouteWithLockCleanupHandler.js';
import correlationIdRepository from './correlationIdRepository.js';

/** @typedef {import('../../src/getAppConfig.js').DevCmsConfig} DevCmsConfig */

/**
 * @param {DevCmsConfig} _config
 */
function configureDocumentCompareRouteHandler(_config) {
	return asyncRouteWithLockCleanupHandler(async (acquireLock, req, res) => {
		const {
			documentAId,
			documentARevisionId,
			documentBId,
			documentBRevisionId,
		} = req.query;
		if (
			!documentBRevisionId ||
			!documentBId ||
			!documentARevisionId ||
			!documentAId
		) {
			res.status(400).end();
			return;
		}

		// Because these requests do not originate from the editor, but from an other server, we
		// have no edit session token.  We do, however, have an correlationId which we may resolve
		// to the editSessionToken used by the corresponding call to the proxy
		const editSessionToken =
			correlationIdRepository.getEditSessionTokenForRequest(req);

		const fileLockA = await acquireLock(documentAId);
		const revisionsAndLatestContentA =
			await req.cms.getRevisionsAndLatestContent(
				documentAId,
				editSessionToken,
				fileLockA,
			);
		const revisionsA = revisionsAndLatestContentA?.revisions;
		const contentA = await req.cms.getFileByRevisionId(
			documentAId,
			documentARevisionId,
			editSessionToken,
			fileLockA,
		);
		fileLockA.release();

		const fileLockB = await acquireLock(documentBId);
		const revisionsAndLatestContentB =
			await req.cms.getRevisionsAndLatestContent(
				documentBId,
				editSessionToken,
				fileLockB,
			);
		const revisionsB = revisionsAndLatestContentB?.revisions;
		const contentB = await req.cms.getFileByRevisionId(
			documentBId,
			documentBRevisionId,
			editSessionToken,
			fileLockB,
		);
		fileLockB.release();

		const revisionMetadataA = revisionsA?.find(
			(revision) => revision.id === documentARevisionId,
		);
		const revisionMetadataB = revisionsB?.find(
			(revision) => revision.id === documentBRevisionId,
		);
		if (
			contentA === null ||
			contentB === null ||
			!revisionMetadataA ||
			!revisionMetadataB
		) {
			// We did not find something
			res.status(404).end();
			return;
		}

		res
			.status(200)
			.set('content-type', 'application/json; charset=utf-8')
			.json({
				documentARevision: {
					content: contentA,
					author: revisionMetadataA.author,
					lastModifiedTimestamp: revisionMetadataA.lastModifiedTimestamp,
				},
				documentBRevision: {
					content: contentB,
					author: revisionMetadataB.author,
					lastModifiedTimestamp: revisionMetadataB.lastModifiedTimestamp,
				},
			});
	});
}

export default configureDocumentCompareRouteHandler;