1 files changed, 90 insertions, 0 deletions
diff --git a/public/js/search.js b/public/js/search.js
new file mode 100644
index 0000000..90ef720
--- /dev/null
+++ b/public/js/search.js
@@ -0,0 +1,90 @@
+function makeTeaser(body, terms) {
+  if (!body) return '';
+  var TEASER_MAX_CHARS = 200;
+  var lowerBody = body.toLowerCase();
+  var firstTermIndex = -1;
+
+  for (var i = 0; i < terms.length; i++) {
+    var idx = lowerBody.indexOf(terms[i].toLowerCase());
+    if (idx !== -1 && (firstTermIndex === -1 || idx < firstTermIndex)) {
+      firstTermIndex = idx;
+    }
+  }
+
+  var start = Math.max(0, firstTermIndex - 50);
+  var end = Math.min(body.length, start + TEASER_MAX_CHARS);
+  var teaser = (start > 0 ? '…' : '') + body.substring(start, end) + (end < body.length ? '…' : '');
+
+  terms.forEach(function(term) {
+    var regex = new RegExp('(' + term.replace(/[.*+?^${}()|[\]\\]/g, '\\$&') + ')', 'gi');
+    teaser = teaser.replace(regex, '<b>$1</b>');
+  });
+
+  return teaser;
+}
+
+function formatSearchResultItem(item, terms, isLast) {
+  var doc = item.item;
+  return '<div class="search-results__item">'
+    + '<h3>' + doc.title + '</h3>'
+    + '<p>' + makeTeaser(doc.body, terms) + '</p>'
+    + '<p class="s"><a href="' + doc.url + '">' + doc.url + '</a></p>'
+    + '</div>' + (isLast ? '' : '<hr>');
+}
+
+function initSearch() {
+  var $searchInput = document.getElementById("search-input");
+  var $searchResults = document.querySelector(".search-results");
+  var $searchResultsItems = document.querySelector(".search-results__items");
+  var MAX_ITEMS = 20;
+  var currentTerm = "";
+  var debounceTimer;
+
+  if (!$searchInput || !window.searchIndex) return;
+
+  var fuse = new Fuse(window.searchIndex, {
+    keys: [
+      { name: 'title', weight: 2 },
+      { name: 'body', weight: 1 }
+    ],
+    includeMatches: true,
+    minMatchCharLength: 2,
+    threshold: 0.4
+  });
+
+  function doSearch() {
+    var term = $searchInput.value.trim();
+    if (term === currentTerm) return;
+
+    $searchResults.style.display = term === "" ? "none" : "block";
+    $searchResultsItems.innerHTML = "";
+    currentTerm = term;
+
+    if (term === "") return;
+
+    var results = fuse.search(term);
+    if (results.length === 0) {
+      $searchResultsItems.innerHTML = '<p class="s">No results</p>';
+      return;
+    }
+
+    var terms = term.split(" ").filter(function(t) { return t.length > 0; });
+    var count = Math.min(results.length, MAX_ITEMS);
+    for (var i = 0; i < count; i++) {
+      $searchResultsItems.innerHTML += formatSearchResultItem(results[i], terms, i === count - 1);
+    }
+  }
+
+  $searchInput.oninput = function() {
+    clearTimeout(debounceTimer);
+    debounceTimer = setTimeout(doSearch, 150);
+  };
+}
+
+if (document.readyState === "complete" ||
+  (document.readyState !== "loading" && !document.documentElement.doScroll)
+) {
+  initSearch();
+} else {
+  document.addEventListener("DOMContentLoaded", initSearch);
+}