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31 lines
982 B
JavaScript
31 lines
982 B
JavaScript
const {i18n} = require('../../../../server/lib/common');
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const errors = require('@tryghost/errors');
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const urlUtils = require('../../../../shared/url-utils');
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/**
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* @description Middleware, which validates and interprets the page param e.g. /page/1
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* @param {Object} req
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* @param {Object} res
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* @param {Function} next
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* @param {Number} page
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* @returns {*}
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*/
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module.exports = function handlePageParam(req, res, next, page) {
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// routeKeywords.page: 'page'
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const pageRegex = new RegExp('/page/(.*)?/');
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page = parseInt(page, 10);
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if (page === 1) {
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// CASE: page 1 is an alias for the collection index, do a permanent 301 redirect
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return urlUtils.redirect301(res, req.originalUrl.replace(pageRegex, '/'));
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} else if (page < 1 || isNaN(page)) {
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return next(new errors.NotFoundError({
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message: i18n.t('errors.errors.pageNotFound')
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}));
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} else {
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req.params.page = page;
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return next();
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}
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};
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