text: /**
   * # Response context
   *
   * Figures out which context we are currently serving. The biggest challenge with determining this
   * is that the only way to determine whether or not we are a post, or a page, is with data after all the
   * data for the template has been retrieved.
   *
   * Contexts are determined based on 3 pieces of information
   * 1. res.locals.relativeUrl - which never includes the subdirectory
   * 2. req.params.page - always has the page parameter, regardless of if the URL contains a keyword
   * 3. data - used for telling the difference between posts and pages
   */
  // @TODO: fix this!! These regexes are app specific and should be dynamic. They should not belong here....
  // routeKeywords.private: 'private'
  const privatePattern = new RegExp('^\\/private\\/');
  
  // routeKeywords.amp: 'amp'
  const ampPattern = new RegExp('\\/amp\\/$');
  
  const homePattern = new RegExp('^\\/$');
  
  function setResponseContext(req, res, data) {
      const pageParam = req.params && req.params.page !== undefined ? parseInt(req.params.page, 10) : 1;
  
      res.locals = res.locals || {};
      res.locals.context = [];
  
      // If we don't have a relativeUrl, we can't detect the context, so return
      // See web/parent/middleware/ghost-locals
      if (!res.locals.relativeUrl) {
          return;
      }
  
      // Paged context - special rule
      if (!isNaN(pageParam) && pageParam > 1) {
          res.locals.context.push('paged');
      }
  
      // Home context - special rule
      if (homePattern.test(res.locals.relativeUrl)) {
          res.locals.context.push('home');
      }
  
      // Add context 'amp' to either post or page, if we have an `*/amp` route
      if (ampPattern.test(res.locals.relativeUrl) && (data.post || data.page)) {
          res.locals.context.push('amp');
      }
  
      // Each page can only have at most one of these
      if (res.routerOptions && res.routerOptions.context) {
          res.locals.context = res.locals.context.concat(res.routerOptions.context);
      }
  
      if (privatePattern.test(res.locals.relativeUrl)) {
          if (!res.locals.context.includes('private')) {
              res.locals.context.push('private');
          }
      }
  
      // @TODO: remove first if condition when only page key is returned
      //        ref.: https://github.com/TryGhost/Ghost/issues/10042
      if (data && data.post && data.post.page) {
          if (!res.locals.context.includes('page')) {
              res.locals.context.push('page');
          }
      } else if (data && data.post) {
          if (!res.locals.context.includes('post')) {
              res.locals.context.push('post');
          }
      } else if (data && data.page) {
          if (!res.locals.context.includes('page')) {
              res.locals.context.push('page');
          }
      } else if (data && data.tag) {
          if (!res.locals.context.includes('tag')) {
              res.locals.context.push('tag');
          }
      }
  }
  
  module.exports = setResponseContext;
  