hugo-theme-zzo/layouts/partials/sidebar/site-search.html

{{ if $.Param "enableSearch" }}

<div class="search">
  <span class="icon">
    {{ partial "svgs/etc/search.svg" (dict "width" 22 "height" 22) }}
  </span>
  <input id="search" class="input" type="text" placeholder="{{T "search-placeholder"}}" autocomplete="off">
  <div id="search-results" class="dropdown">
    <div id="search-menu" class="dropdown-menu" role="menu">
    </div>
  </div>
</div>

{{ partial "sidebar/site-mark" . }}
{{ $lunr := resources.Get "js/lunr.min.js" | fingerprint }}

<script>
  {{ if .Site.IsMultiLingual }}
      var baseurl = "{{.Site.BaseURL}}{{.Site.LanguagePrefix}}";
  {{ else }}
      var baseurl = "{{.Site.BaseURL}}";
  {{ end }}
  fetchInject([
    "{{ $lunr.RelPermalink }}",
  ]).then(() => {
    var lunrIndex = null;
    var pagesIndex = null;
    var searchResults = null;
    var searchMenu = null;
    
    function endsWith(str, suffix) {
      return str.indexOf(suffix, str.length - suffix.length) !== -1;
    }

    function initLunr() {
      if (!endsWith(baseurl, "/")) {
        baseurl = baseurl + '/';
      };

      $.getJSON(baseurl + "index.json")
        .done(function (index) {
          pagesIndex = index;
          lunrIndex = lunr(function () {            
            this.ref('uri');
            this.field('title');
            this.field('description');
            //this.field('content');
            //this.field('tags');
            //this.field('series');
            //this.field('categories');

            var that = this;
            index.forEach(function(page) {
              that.add(page);
            });            
          });
        })
        .fail(function (jqxhr, textStatus, error) {
          var err = textStatus + ", " + error;
          console.error("Error getting Hugo index file:", err);
        });
    }

    function search(query) {
      return lunrIndex.search(query).map(function (result) {               
        return pagesIndex.filter(function (page) {
          return page.uri === result.ref;
        })[0];
      });
    }

    function renderSearchResults(results) {
      searchResults = document.getElementById('search-results');
      searchMenu = document.getElementById('search-menu');
      searchResults.setAttribute('class', 'dropdown is-active');
      
      var content = document.createElement('div');
      content.setAttribute('class', 'dropdown-content search-content');      

      if (results.length > 0) {
        results.forEach(function (result) {
          var item = document.createElement('a');
          item.setAttribute('href', result.uri);
          item.setAttribute('class', 'dropdown-item');
          item.innerHTML = `<div class="menu-item"><div class="menu-item__title">» ${result.title}</div><div class="menu-item__desc">${result.description ? result.description : result.content}</div></div>`;
          content.appendChild(item);          
        });
      } else {
        var item = document.createElement('span');
        item.setAttribute('class', 'dropdown-item');
        item.innerText = 'No results found';
        content.appendChild(item);
      }
      
      while (searchMenu.hasChildNodes()) {
        searchMenu.removeChild(
          searchMenu.lastChild
        );
      }
      searchMenu.appendChild(content);
    }

    initLunr();

    $("#search").on('input', function(e) {
      if (!e.target.value) {
        $('#search-results').attr('class', 'dropdown');
        return null;
      }
      var results = search(e.target.value);
      renderSearchResults(results);
    });    

    $('#search').on('blur', function() {
      setTimeout(function() {
        $('#search-results').attr('class', 'dropdown');
      }, 100);
    });
    
    $('#search').on('click', function (e) {
      if (!e.target.value) {
        $('#search-results').attr('class', 'dropdown');
        return null;
      }
      var results = search(e.target.value);
      renderSearchResults(results);
    });

    $('#search').on('keydown', function(e) {
      var items = $('#search-menu .dropdown-item');      
      var activeIndex = $('#search-menu .dropdown-item.is-active').index();
      
      items.removeClass('is-active');      
      if (e.key === 'ArrowDown') {
        items.eq(activeIndex + 1).addClass('is-active');
      } else if (e.key === 'ArrowUp') {
        items.eq(activeIndex - 1).addClass('is-active');
      } else if (e.key === 'Enter') {
        var currentItemLink = items.eq(activeIndex).attr('href');
        if (currentItemLink) {
          location.href = currentItemLink;
        }        
      }
    });
    
  });
</script>
{{ end }}