#29 검색 기능 추가

@kciter 님께서 주신 자료를 가지고 붙여넣기만 했습니다
현재는 포스트 양이 적으니까 별 무리 없을 것 같아 수정은 안했습니다

Author: ChangJoo-Park

_layouts/search.html

@@ -0,0 +1,10 @@
+---
+layout: default
+---
+
+<div class="search">
+	{{ content }}
+</div>
+
+<script src="../js/vendors/lunr.js"></script>
+<script src="../js/search.js"></script>

_sass/_forms.scss

@@ -104,3 +104,18 @@ textarea {
   outline: none;
   box-shadow: 0 0 2px rgba($blue, .5);
 }
+.search-form {
+  margin-bottom: 10px;
+}
+#search-box {
+  box-sizing: border-box;
+  width: 100%;
+  border: none;
+  border-bottom: 1px solid #000;
+  outline: none;
+  transition: border-color 0.3s ease-in-out, border-width 0.1s ease-in-out;
+}
+
+#search-box:focus {
+  border-bottom: 3px solid #41B883;
+}

index.html

@@ -2,6 +2,10 @@
 layout: default
 ---
 {% assign posts_count = (paginator.posts | size) %}
+<form class="search-form" action="/search" method="get">
+  <label for="search_box"></label>
+  <input type="text" id="search-box" name="query" placeholder="검색">
+</form>
 
 <div class="home">
   {% if posts_count > 0 %}

js/search.js

@@ -0,0 +1,61 @@
+(function() {
+  function displaySearchResults(results, store) {
+    var searchResults = document.getElementById('search-results');
+
+    if (results.length) { // Are there any results?
+      var appendString = '';
+
+      for (var i = 0; i < results.length; i++) {  // Iterate over the results
+        var item = store[results[i].ref];
+        appendString += '<li><a href="' + item.url + '"><h3>' + item.title + '</h3></a>';
+        appendString += '<p>' + item.content.substring(0, 150) + '...</p></li>';
+      }
+
+      searchResults.innerHTML = appendString;
+    } else {
+      searchResults.innerHTML = '<li>검색어에 대한 내용이 없습니다. 다른 검색어로 찾아보시는 것은 어떨까요?</li>';
+    }
+  }
+
+  function getQueryVariable(variable) {
+    var query = window.location.search.substring(1);
+    var vars = query.split('&');
+
+    for (var i = 0; i < vars.length; i++) {
+      var pair = vars[i].split('=');
+
+      if (pair[0] === variable) {
+        return decodeURIComponent(pair[1].replace(/\+/g, '%20'));
+      }
+    }
+  }
+
+  var searchTerm = getQueryVariable('query');
+
+  if (searchTerm) {
+    document.getElementById('search-box').setAttribute("value", searchTerm);
+
+    // Initalize lunr with the fields it will be searching on. I've given title
+    // a boost of 10 to indicate matches on this field are more important.
+    var idx = lunr(function () {
+      this.field('id');
+      this.field('title', { boost: 10 });
+      this.field('author');
+      this.field('category');
+      this.field('content');
+    });
+
+    for (var key in window.store) { // Add the data to lunr
+      idx.add({
+        'id': key,
+        'title': window.store[key].title,
+        'author': window.store[key].author,
+        'category': window.store[key].category,
+        'content': window.store[key].content
+      });
+
+      var results = idx.search(searchTerm); // Get lunr to perform a search
+      displaySearchResults(results, window.store); // We'll write this in the next section
+    }
+  }
+})();

js/vendors/lunr.js

@@ -0,0 +1,24 @@
+---
+layout: search
+---
+<form action="/search" method="get">
+  <label for="search-box"></label>
+  <input type="text" id="search-box" name="query">
+</form>
+
+<ul id="search-results"></ul>
+
+<script>
+window.store = {
+  {% for post in site.posts %}
+    "{{ post.url | slugify }}": {
+      "title": "{{ post.title | xml_escape }}",
+      "author": "{{ post.author | xml_escape }}",
+      "category": "{{ post.category | xml_escape }}",
+      "content": {{ post.content | strip_html | strip_newlines | jsonify }},
+      "url": "{{ post.url | xml_escape }}"
+    }
+    {% unless forloop.last %},{% endunless %}
+  {% endfor %}
+};
+</script>