text: const _ = require('lodash');
  const settingsCache = require('../../shared/settings-cache');
  
  function optionalString(test, string) {
      if (test) {
          return string;
      }
      return '';
  }
  
  function getTitle(data, root, options = {}) {
      const context = root ? root.context : null;
      const siteTitle = settingsCache.get('title') || '';
      const pagination = root ? root.pagination : null;
  
      // options.property = null/'og'/'twitter'
      const optionsPropertyName = `${options.property || 'meta'}_title`;
  
      let title = '';
      let pageString = '';
  
      if (pagination && pagination.total > 1) {
          pageString = _.has(options.hash, 'page') ? options.hash.page.replace('%', pagination.page) : ' (Page ' + pagination.page + ')';
      }
  
      const dashSiteTitle = optionalString(siteTitle, ' - ' + siteTitle);
      const dashSiteTitlePage = optionalString(siteTitle || pageString, ' -' + optionalString(siteTitle, ' ' + siteTitle) + pageString);
  
      // If there's a specific meta title
      if (data.meta_title) {
          title = data.meta_title;
      // Home title
      } else if (_.includes(context, 'home')) {
          if (options.property) {
              title = settingsCache.get(optionsPropertyName) || siteTitle;
          } else {
              title = settingsCache.get('meta_title') || siteTitle;
          }
      // Author title, paged
      } else if (_.includes(context, 'author') && data.author && _.includes(context, 'paged')) {
          title = data.author.name + dashSiteTitlePage;
      // Author title, index
      } else if (_.includes(context, 'author') && data.author) {
          title = data.author.name + dashSiteTitle;
      // Tag title, paged
      } else if (_.includes(context, 'tag') && data.tag && _.includes(context, 'paged')) {
          title = data.tag.meta_title || data.tag.name + dashSiteTitlePage;
      // Tag title, index
      } else if (_.includes(context, 'tag') && data.tag) {
          title = data.tag[optionsPropertyName] || data.tag.meta_title || data.tag.name + dashSiteTitle;
      // Post title
      } else if (_.includes(context, 'post') && data.post) {
          title = data.post[optionsPropertyName] || data.post.meta_title || data.post.title;
      // Page title dependent on legacy object formatting (https://github.com/TryGhost/Ghost/issues/10042)
      } else if (_.includes(context, 'page') && data.post) {
          title = data.post[optionsPropertyName] || data.post.meta_title || data.post.title;
      // Page title v2
      } else if (_.includes(context, 'page') && data.page) {
          title = data.page[optionsPropertyName] || data.page.meta_title || data.page.title;
      // Fallback
      } else {
          title = siteTitle + pageString;
      }
  
      return (title || '').trim();
  }
  
  module.exports = getTitle;
  