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

Development tools for Fonto.

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

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

/**
 * @param {DevCmsConfig} _config
 */
export default function configureDocumentRevisionGetPostRouteHandler(_config) {
	return asyncRouteWithLockCleanupHandler(async (acquireLock, req, res) => {
		const documentsRevisions = req.body.documentsRevisions;
		const correlationIdRepository = req.repositories.correlationId;

		// Because these requests do not originate from the editor, but from another 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.
		// For review this endpoint might also be called from the editor, in which case the
		// editSessionToken is provided as a body parameter.
		const editSessionToken =
			req.body.context && req.body.context.editSessionToken
				? req.body.context.editSessionToken
				: correlationIdRepository.getEditSessionTokenForRequest(req);

		const results = await Promise.all(
			documentsRevisions.map(async (documentRevisions) => {
				const documentId = documentRevisions.documentId;

				const documentExists = req.cms.existsSync(documentId);
				if (!documentExists) {
					return {
						documentId,
						status: 404,
					};
				}

				const revisions = await Promise.all(
					documentRevisions.revisionIds.map(async (revisionId) => {
						// Using a file lock per revision, otherwise we might still cause a race condition.
						const fileLock = await acquireLock(documentId);
						const content = await req.cms.getFileByRevisionId(
							documentId,
							revisionId,
							editSessionToken,
							fileLock,
						);
						fileLock.release();
						if (content === null) {
							return {
								revisionId,
								status: 404,
							};
						}
						return {
							revisionId,
							status: 200,
							revision: {
								content,
							},
						};
					}),
				);

				return {
					documentId,
					status: 200,
					revisions,
				};
			}),
		);

		res
			.status(200)
			.set('content-type', 'application/json; charset=utf-8')
			.json({
				results,
			});
	});
}