Update feature search posts

js/super-search.js

@@ -0,0 +1,132 @@
+/*  Super Search
+    Author: Kushagra Gour (http://kushagragour.in)
+    MIT Licensed
+*/
+
+(function () {
+    var isSearchOpen = false,
+        searchEl = document.querySelector('#js-search'),
+        searchInputEl = document.querySelector('#js-search__input'),
+        searchResultsEl = document.querySelector('#js-search__results'),
+        currentInputValue = '',
+        lastSearchResultHash,
+        posts = [];
+
+    // Changes XML to JSON
+    // Modified version from here: http://davidwalsh.name/convert-xml-json
+    function xmlToJson(xml) {
+
+        // Create the return object
+        var obj = {};
+
+        if (xml.nodeType == 1) { // element
+            // do attributes
+            if (xml.attributes.length > 0) {
+            obj["@attributes"] = {};
+                for (var j = 0; j < xml.attributes.length; j++) {
+                    var attribute = xml.attributes.item(j);
+                    obj["@attributes"][attribute.nodeName] = attribute.nodeValue;
+                }
+            }
+        } else if (xml.nodeType == 3) { // text
+            obj = xml.nodeValue;
+        }
+
+        // do children
+        // If all text nodes inside, get concatenated text from them.
+        var textNodes = [].slice.call(xml.childNodes).filter(function (node) { return node.nodeType === 3; });
+        if (xml.hasChildNodes() && xml.childNodes.length === textNodes.length) {
+            obj = [].slice.call(xml.childNodes).reduce(function (text, node) { return text + node.nodeValue; }, '');
+        }
+        else if (xml.hasChildNodes()) {
+            for(var i = 0; i < xml.childNodes.length; i++) {
+                var item = xml.childNodes.item(i);
+                var nodeName = item.nodeName;
+                if (typeof(obj[nodeName]) == "undefined") {
+                    obj[nodeName] = xmlToJson(item);
+                } else {
+                    if (typeof(obj[nodeName].push) == "undefined") {
+                        var old = obj[nodeName];
+                        obj[nodeName] = [];
+                        obj[nodeName].push(old);
+                    }
+                    obj[nodeName].push(xmlToJson(item));
+                }
+            }
+        }
+        return obj;
+    }
+
+    function getPostsFromXml(xml) {
+        var json = xmlToJson(xml);
+        return json.channel.item;
+    }
+
+    var xmlhttp=new XMLHttpRequest();
+    xmlhttp.open("GET","/sitemap.xml");
+    xmlhttp.onreadystatechange = function () {
+        if (xmlhttp.readyState != 4) return;
+        if (xmlhttp.status != 200 && xmlhttp.status != 304) { return; }
+        var node = (new DOMParser).parseFromString(xmlhttp.responseText, 'text/xml');
+        node = node.children[0];
+        posts = getPostsFromXml(node);
+    }
+    xmlhttp.send();
+
+    window.toggleSearch = function toggleSearch() {
+        _gaq.push(['_trackEvent', 'supersearch', searchEl.classList.contains('is-active')]);
+        searchEl.classList.toggle('is-active');
+        if (searchEl.classList.contains('is-active')) {
+            // while opening
+            searchInputEl.value = '';
+        } else {
+            // while closing
+            searchResultsEl.classList.add('is-hidden');
+        }
+        setTimeout(function () {
+            searchInputEl.focus();
+        }, 210);
+    }
+
+    window.addEventListener('keyup', function onKeyPress(e) {
+        if (e.which === 27) {
+            toggleSearch();
+        }
+    });
+    window.addEventListener('keypress', function onKeyPress(e) {
+        if (e.which === 47 && !searchEl.classList.contains('is-active')) {
+            toggleSearch();
+        }
+    });
+
+    searchInputEl.addEventListener('input', function onInputChange() {
+        var currentResultHash, d;
+
+        currentInputValue = searchInputEl.value;
+        if (!currentInputValue || currentInputValue.length < 3) {
+            lastSearchResultHash = '';
+            searchResultsEl.classList.add('is-hidden');
+            return;
+        }
+        searchResultsEl.style.offsetWidth;
+
+        var matchingPosts = posts.filter(function (post) {
+            if (post.title.indexOf(currentInputValue) !== -1 || post.description.indexOf(currentInputValue) !== -1) {
+                return true;
+            }
+        });
+        if (!matchingPosts.length) {
+            searchResultsEl.classList.add('is-hidden');
+        }
+        currentResultHash = matchingPosts.reduce(function(hash, post) { return post.title + hash; }, '');
+        if (matchingPosts.length && currentResultHash !== lastSearchResultHash) {
+            searchResultsEl.classList.remove('is-hidden');
+            searchResultsEl.innerHTML = matchingPosts.map(function (post) {
+                d = new Date(post.pubDate);
+                return '<li><a href="' + post.link + '">' + post.title + '<span class="search__result-date">' + d.toUTCString().replace(/.*(\d{2})\s+(\w{3})\s+(\d{4}).*/,'$2 $1, $3') + '</span></a></li>';
+            }).join('');
+        }
+        lastSearchResultHash = currentResultHash;
+    });
+
+})();