42 lines
1.6 KiB
JavaScript
42 lines
1.6 KiB
JavaScript
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const _ = require('lodash');
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const urlUtils = require('../../shared/url-utils');
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function getPaginatedUrl(page, data, absolute) {
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// If we don't have enough information, return null right away
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if (!data || !data.relativeUrl || !data.pagination) {
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return null;
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}
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// routeKeywords.page: 'page'
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const pagePath = urlUtils.urlJoin('/page/');
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// Try to match the base url, as whatever precedes the pagePath
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// routeKeywords.page: 'page'
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const baseUrlPattern = new RegExp('(.+)?(/page/\\d+/)');
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const baseUrlMatch = data.relativeUrl.match(baseUrlPattern);
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// If there is no match for pagePath, use the original url, without the trailing slash
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const baseUrl = baseUrlMatch ? baseUrlMatch[1] : data.relativeUrl.slice(0, -1);
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let newRelativeUrl;
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if (page === 'next' && data.pagination.next) {
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newRelativeUrl = urlUtils.urlJoin(pagePath, data.pagination.next, '/');
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} else if (page === 'prev' && data.pagination.prev) {
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newRelativeUrl = data.pagination.prev > 1 ? urlUtils.urlJoin(pagePath, data.pagination.prev, '/') : '/';
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} else if (_.isNumber(page)) {
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newRelativeUrl = page > 1 ? urlUtils.urlJoin(pagePath, page, '/') : '/';
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} else {
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// If none of the cases match, return null right away
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return null;
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}
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// baseUrl can be undefined, if there was nothing preceding the pagePath (e.g. first page of the index channel)
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newRelativeUrl = baseUrl ? urlUtils.urlJoin(baseUrl, newRelativeUrl) : newRelativeUrl;
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return urlUtils.urlFor({relativeUrl: newRelativeUrl}, absolute);
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}
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module.exports = getPaginatedUrl;
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