@ministryofjustice/hmpps-digital-prison-reporting-frontend/dpr/middleware/setUpNestedRoute.js

The Digital Prison Reporting Frontend contains templates and code to help display data effectively in UI applications.

import { setNestedPath } from '../utils/urlHelper.js';
import logger from '../utils/logger.js';

const setupNestedRoute = () => {
    return (req, res, next) => {
        const locals = res.app.locals.dprPaths;
        if (locals) {
            // Initialise originals once
            if (!locals.original) {
                locals.original = { ...locals };
            }
            const base = req.baseUrl && req.baseUrl.length > 0 ? req.baseUrl : undefined;
            const { original } = locals;
            // CASE 1: no baseUrl so reset to originals
            if (!base) {
                locals.nestedBaseUrl = undefined;
                Object.assign(locals, original);
                return next();
            }
            // CASE 2: baseUrl is the SAME as last time so skip
            if (locals.nestedBaseUrl === base) {
                return next();
            }
            logger.info('Running nested-route middleware', JSON.stringify({
                routerBase: req.baseUrl,
                mountPoint: req.originalUrl,
            }));
            // CASE 3: baseUrl is NEW so apply nested version
            locals.nestedBaseUrl = base;
            locals.bookmarkActionEndpoint = setNestedPath(original.bookmarkActionEndpoint, base);
            locals.subscribePath = setNestedPath(original.subscribePath, base);
            locals.downloadActionEndpoint = setNestedPath(original.downloadActionEndpoint, base);
            locals.productCollectionEndpoint = setNestedPath(original.productCollectionEndpoint, base);
            locals.bookmarkListPath = setNestedPath(original.bookmarkListPath, base);
            locals.requestedListPath = setNestedPath(original.requestedListPath, base);
            locals.recentlyViewedListPath = setNestedPath(original.recentlyViewedListPath, base);
            locals.reportsCatalogue = setNestedPath(original.reportsCatalogue, base);
            locals.userReportsList = setNestedPath(original.userReportsList, base);
            locals.dprHomepage = setNestedPath(original.dprHomepage, base);
            locals.requestReportPath = setNestedPath(original.requestReportPath, base);
            locals.viewReportPath = setNestedPath(original.viewReportPath, base);
        }
        return next();
    };
};

export { setupNestedRoute as default, setupNestedRoute };
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