76 lines
2.5 KiB
JavaScript
76 lines
2.5 KiB
JavaScript
/**
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* # Response context
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*
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* Figures out which context we are currently serving. The biggest challenge with determining this
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* is that the only way to determine whether or not we are a post, or a page, is with data after all the
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* data for the template has been retrieved.
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*
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* Contexts are determined based on 3 pieces of information
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* 1. res.locals.relativeUrl - which never includes the subdirectory
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* 2. req.params.page - always has the page parameter, regardless of if the URL contains a keyword
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* 3. data - used for telling the difference between posts and pages
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*/
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// @TODO: fix this!! These regexes are app specific and should be dynamic. They should not belong here....
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// routeKeywords.private: 'private'
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const privatePattern = new RegExp('^\\/private\\/');
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// routeKeywords.amp: 'amp'
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const ampPattern = new RegExp('\\/amp\\/$');
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const homePattern = new RegExp('^\\/$');
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function setResponseContext(req, res, data) {
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const pageParam = req.params && req.params.page !== undefined ? parseInt(req.params.page, 10) : 1;
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res.locals = res.locals || {};
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res.locals.context = [];
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// If we don't have a relativeUrl, we can't detect the context, so return
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// See web/parent/middleware/ghost-locals
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if (!res.locals.relativeUrl) {
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return;
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}
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// Paged context - special rule
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if (!isNaN(pageParam) && pageParam > 1) {
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res.locals.context.push('paged');
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}
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// Home context - special rule
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if (homePattern.test(res.locals.relativeUrl)) {
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res.locals.context.push('home');
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}
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// Add context 'amp' to either post or page, if we have an `*/amp` route
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if (ampPattern.test(res.locals.relativeUrl) && (data.post || data.page)) {
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res.locals.context.push('amp');
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}
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// Each page can only have at most one of these
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if (res.routerOptions && res.routerOptions.context) {
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res.locals.context = res.locals.context.concat(res.routerOptions.context);
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}
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if (privatePattern.test(res.locals.relativeUrl)) {
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if (!res.locals.context.includes('private')) {
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res.locals.context.push('private');
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}
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}
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if (data && data.page) {
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if (!res.locals.context.includes('page')) {
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res.locals.context.push('page');
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}
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} else if (data && data.post) {
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if (!res.locals.context.includes('post')) {
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res.locals.context.push('post');
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}
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} else if (data && data.tag) {
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if (!res.locals.context.includes('tag')) {
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res.locals.context.push('tag');
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}
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}
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}
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module.exports = setResponseContext;
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