feat: basic flexsearch implementation

assets/js/flexsearch.js

@@ -0,0 +1,86 @@
+// {{ $searchDataFile := printf "%s.search-data.json" .Language.Lang }}
+// {{ $searchData := resources.Get "json/search-data.json" | resources.ExecuteAsTemplate $searchDataFile . | resources.Minify | resources.Fingerprint }}
+
+(function () {
+  const searchDataURL = '{{ $searchData.Permalink }}';
+  console.log('searchDataURL', searchDataURL);
+
+  const indexConfig = {
+    tokenize: "full",
+    cache: 100,
+    document: {
+      id: 'id',
+      store: ['title', 'href', 'section'],
+      index: ["title", "content"]
+    },
+    context: {
+      resolution: 9,
+      depth: 2,
+      bidirectional: true
+    }
+  }
+  window.flexSearchIndex = new FlexSearch.Document(indexConfig);
+
+  const input = document.getElementById('search-input');
+  const results = document.getElementById('search-results');
+
+  input.addEventListener('focus', init);
+  input.addEventListener('keyup', search);
+
+
+  /**
+   * Initializes the search functionality by adding the necessary event listeners and fetching the search data.
+   */
+  function init() {
+    input.removeEventListener('focus', init); // init once
+
+    fetch(searchDataURL).then(resp => resp.json()).then(pages => {
+      pages.forEach(page => {
+        window.flexSearchIndex.add(page);
+      });
+    }).then(search);
+  }
+
+  function search() {
+    console.log('search', input.value);
+    while (results.firstChild) {
+      results.removeChild(results.firstChild);
+    }
+
+    if (!input.value) {
+      return;
+    }
+
+    const searchHits = window.flexSearchIndex.search(input.value, { limit: 5, enrich: true });
+    showResults(searchHits);
+  }
+
+  function showResults(hits) {
+    console.log('showResults', hits);
+    const flatResults = new Map(); // keyed by href to dedupe hits
+    for (const result of hits.flatMap(r => r.result)) {
+      if (flatResults.has(result.doc.href)) continue;
+      flatResults.set(result.doc.href, result.doc);
+    }
+    console.log('flatResults', flatResults);
+    const create = (str) => {
+      const div = document.createElement('div');
+      div.innerHTML = str.trim();
+      return div.firstChild;
+    }
+    const fragment = document.createDocumentFragment();
+
+    console.log(fragment)
+
+    for (const result of flatResults.values()) {
+      const li = create(`
+      <li class="mx-2.5 break-words rounded-md contrast-more:border text-gray-800 contrast-more:border-transparent dark:text-gray-300">
+        <a class="block scroll-m-12 px-2.5 py-2" data-index="0" href="${result.href}">
+          <div class="text-base font-semibold leading-5">${result.title}</div>
+        </a>
+      </li>`);
+      fragment.appendChild(li);
+    }
+    results.appendChild(fragment);
+  }
+})();