From cc3b21bc86e4e65f5d3d758d3162de8039779dcf Mon Sep 17 00:00:00 2001
From: Nick Garlis <nickgarlis@gmail.com>
Date: Wed, 15 Nov 2017 21:43:31 +0200
Subject: [PATCH] Add Lunr Search (#1353)

* Add `search.html` layout and JavaScript
* Move `{{ content }}` before search input
* Add spaces for consistency

Close #1011
---
 _includes/scripts.html              |  5 ++
 _layouts/search.html                | 30 ++++++++++
 _sass/minimal-mistakes/_search.scss | 10 ++++
 assets/js/lunr-en.js                | 92 +++++++++++++++++++++++++++++
 assets/js/lunr.min.js               |  7 +++
 docs/_pages/search.md               |  5 ++
 test/_pages/search.md               |  5 ++
 7 files changed, 154 insertions(+)
 create mode 100644 _layouts/search.html
 create mode 100644 _sass/minimal-mistakes/_search.scss
 create mode 100644 assets/js/lunr-en.js
 create mode 100644 assets/js/lunr.min.js
 create mode 100644 docs/_pages/search.md
 create mode 100644 test/_pages/search.md

diff --git a/_includes/scripts.html b/_includes/scripts.html
index e685cddf..8a454e7b 100644
--- a/_includes/scripts.html
+++ b/_includes/scripts.html
@@ -11,5 +11,10 @@
   <script src="{{ '/assets/js/main.min.js' | absolute_url }}"></script>
 {% endif %}
 
+{% if page.layout == 'search' %}
+  <script src="{{ '/assets/js/lunr.min.js' | absolute_url }}"></script>
+  <script src="{{ '/assets/js/lunr-en.js' | absolute_url }}"></script>
+{% endif %}
+
 {% include analytics.html %}
 {% include /comments-providers/scripts.html %}
diff --git a/_layouts/search.html b/_layouts/search.html
new file mode 100644
index 00000000..d9cdfe3e
--- /dev/null
+++ b/_layouts/search.html
@@ -0,0 +1,30 @@
+---
+layout: default
+---
+
+{% if page.header.overlay_color or page.header.overlay_image or page.header.image %}
+  {% include page__hero.html %}
+{% endif %}
+
+{% if page.url != "/" and site.breadcrumbs %}
+  {% unless paginator %}
+    {% include breadcrumbs.html %}
+  {% endunless %}
+{% endif %}
+
+<div id="main" role="main">
+  {% include sidebar.html %}
+
+  <div class="archive">
+    {% unless page.header.overlay_color or page.header.overlay_image %}
+      <h1 class="page__title">{{ page.title }}</h1>
+    {% endunless %}
+
+    {{ content }}
+    
+    <input placeholder="Search..." type="search" id="search" class="search-input">
+    <div id="results"></div>
+
+
+  </div>
+</div>
diff --git a/_sass/minimal-mistakes/_search.scss b/_sass/minimal-mistakes/_search.scss
new file mode 100644
index 00000000..90bc9893
--- /dev/null
+++ b/_sass/minimal-mistakes/_search.scss
@@ -0,0 +1,10 @@
+.search-input {
+  -webkit-appearance: none;
+  border: 0;
+  border-radius: .25em;
+  font-family: inherit;
+  font-size: 1.25em;
+  margin: 2em auto 1em;
+  padding: .5em;
+  width: 100%;
+}
diff --git a/assets/js/lunr-en.js b/assets/js/lunr-en.js
new file mode 100644
index 00000000..bf0dd279
--- /dev/null
+++ b/assets/js/lunr-en.js
@@ -0,0 +1,92 @@
+---
+
+---
+var idx = lunr(function () {
+  this.field('title', {boost: 10})
+  this.field('excerpt')
+  this.field('categories')
+  this.field('tags')
+  this.ref('id')
+});
+
+{% assign count = 0 %}
+{% for c in site.collections %}
+  {% assign docs = c.docs %}
+  {% for doc in docs %}
+    idx.add({
+      title: {{ doc.title | jsonify }},
+      excerpt: {{ doc.excerpt | strip_html | truncatewords: 20 | jsonify }},
+      categories: {{ doc.categories | jsonify }},
+      tags: {{ doc.tags | jsonify }},
+      id: {{ count }}
+    });
+    {% assign count = count | plus: 1 %}
+  {% endfor %}
+{% endfor %}
+
+console.log( jQuery.type(idx) );
+
+var store = [
+  {% for c in site.collections %}
+    {% if forloop.last %}
+      {% assign l = true %}
+    {% endif %}
+    {% assign docs = c.docs %}
+    {% for doc in docs %}
+      {% if doc.header.teaser %}
+        {% capture teaser %}{{ doc.header.teaser }}{% endcapture %}
+      {% else %}
+        {% assign teaser = site.teaser %}
+      {% endif %}
+      {
+        "title": {{ doc.title | jsonify }},
+        "url": {{ doc.url | absolute_url | jsonify }},
+        "excerpt": {{ doc.content | strip_html | truncatewords: 20 | jsonify }},
+        "teaser":
+          {% if teaser contains "://" %}
+            {{ teaser | jsonify }}
+          {% else %}
+            {{ teaser | absolute_url | jsonify }}
+          {% endif %}
+      }{% unless forloop.last and l %},{% endunless %}
+    {% endfor %}
+  {% endfor %}]
+
+$(document).ready(function() {
+  $('input#search').on('keyup', function () {
+    var resultdiv = $('#results');
+    var query = $(this).val();
+    var result = idx.search(query);
+    resultdiv.empty();
+    resultdiv.prepend('<p>'+result.length+' Result(s) found</p>');
+    for (var item in result) {
+      var ref = result[item].ref;
+      if(store[ref].teaser){
+        var searchitem =
+          '<div>'+
+            '<article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">'+
+              '<div class="archive__item-teaser">'+
+                '<img src="'+store[ref].teaser+'" alt="">'+
+              '</div>'+
+              '<h2 class="archive__item-title" itemprop="headline">'+
+                '<a href="'+store[ref].url+'" rel="permalink">'+store[ref].title+'</a>'+
+              '</h2>'+
+              '<p class="archive__item-excerpt" itemprop="description">'+store[ref].excerpt+'</p>'+
+            '</article>'+
+          '</div>';
+      }
+      else{
+    	  var searchitem =
+          '<div>'+
+            '<article class="archive__item" itemscope itemtype="http://schema.org/CreativeWork">'+
+              '<h2 class="archive__item-title" itemprop="headline">'+
+                '<a href="'+store[ref].url+'" rel="permalink">'+store[ref].title+'</a>'+
+              '</h2>'+
+              '<p class="archive__item-excerpt" itemprop="description">'+store[ref].excerpt+'</p>'+
+            '</article>'+
+          '</div>';
+      }
+      resultdiv.append(searchitem);
+    }
+  });
+});
diff --git a/assets/js/lunr.min.js b/assets/js/lunr.min.js
new file mode 100644
index 00000000..914dcc62
--- /dev/null
+++ b/assets/js/lunr.min.js
@@ -0,0 +1,7 @@
+/**
+ * lunr - http://lunrjs.com - A bit like Solr, but much smaller and not as bright - 0.5.12
+ * Copyright (C) 2015 Oliver Nightingale
+ * MIT Licensed
+ * @license
+ */
+!function(){var t=function(e){var n=new t.Index;return n.pipeline.add(t.trimmer,t.stopWordFilter,t.stemmer),e&&e.call(n,n),n};t.version="0.5.12",t.utils={},t.utils.warn=function(t){return function(e){t.console&&console.warn&&console.warn(e)}}(this),t.EventEmitter=function(){this.events={}},t.EventEmitter.prototype.addListener=function(){var t=Array.prototype.slice.call(arguments),e=t.pop(),n=t;if("function"!=typeof e)throw new TypeError("last argument must be a function");n.forEach(function(t){this.hasHandler(t)||(this.events[t]=[]),this.events[t].push(e)},this)},t.EventEmitter.prototype.removeListener=function(t,e){if(this.hasHandler(t)){var n=this.events[t].indexOf(e);this.events[t].splice(n,1),this.events[t].length||delete this.events[t]}},t.EventEmitter.prototype.emit=function(t){if(this.hasHandler(t)){var e=Array.prototype.slice.call(arguments,1);this.events[t].forEach(function(t){t.apply(void 0,e)})}},t.EventEmitter.prototype.hasHandler=function(t){return t in this.events},t.tokenizer=function(t){return arguments.length&&null!=t&&void 0!=t?Array.isArray(t)?t.map(function(t){return t.toLowerCase()}):t.toString().trim().toLowerCase().split(/[\s\-]+/):[]},t.Pipeline=function(){this._stack=[]},t.Pipeline.registeredFunctions={},t.Pipeline.registerFunction=function(e,n){n in this.registeredFunctions&&t.utils.warn("Overwriting existing registered function: "+n),e.label=n,t.Pipeline.registeredFunctions[e.label]=e},t.Pipeline.warnIfFunctionNotRegistered=function(e){var n=e.label&&e.label in this.registeredFunctions;n||t.utils.warn("Function is not registered with pipeline. This may cause problems when serialising the index.\n",e)},t.Pipeline.load=function(e){var n=new t.Pipeline;return e.forEach(function(e){var i=t.Pipeline.registeredFunctions[e];if(!i)throw new Error("Cannot load un-registered function: "+e);n.add(i)}),n},t.Pipeline.prototype.add=function(){var e=Array.prototype.slice.call(arguments);e.forEach(function(e){t.Pipeline.warnIfFunctionNotRegistered(e),this._stack.push(e)},this)},t.Pipeline.prototype.after=function(e,n){t.Pipeline.warnIfFunctionNotRegistered(n);var i=this._stack.indexOf(e);if(-1==i)throw new Error("Cannot find existingFn");i+=1,this._stack.splice(i,0,n)},t.Pipeline.prototype.before=function(e,n){t.Pipeline.warnIfFunctionNotRegistered(n);var i=this._stack.indexOf(e);if(-1==i)throw new Error("Cannot find existingFn");this._stack.splice(i,0,n)},t.Pipeline.prototype.remove=function(t){var e=this._stack.indexOf(t);-1!=e&&this._stack.splice(e,1)},t.Pipeline.prototype.run=function(t){for(var e=[],n=t.length,i=this._stack.length,o=0;n>o;o++){for(var r=t[o],s=0;i>s&&(r=this._stack[s](r,o,t),void 0!==r);s++);void 0!==r&&e.push(r)}return e},t.Pipeline.prototype.reset=function(){this._stack=[]},t.Pipeline.prototype.toJSON=function(){return this._stack.map(function(e){return t.Pipeline.warnIfFunctionNotRegistered(e),e.label})},t.Vector=function(){this._magnitude=null,this.list=void 0,this.length=0},t.Vector.Node=function(t,e,n){this.idx=t,this.val=e,this.next=n},t.Vector.prototype.insert=function(e,n){this._magnitude=void 0;var i=this.list;if(!i)return this.list=new t.Vector.Node(e,n,i),this.length++;if(e<i.idx)return this.list=new t.Vector.Node(e,n,i),this.length++;for(var o=i,r=i.next;void 0!=r;){if(e<r.idx)return o.next=new t.Vector.Node(e,n,r),this.length++;o=r,r=r.next}return o.next=new t.Vector.Node(e,n,r),this.length++},t.Vector.prototype.magnitude=function(){if(this._magnitude)return this._magnitude;for(var t,e=this.list,n=0;e;)t=e.val,n+=t*t,e=e.next;return 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t.Store,this.tokenStore=new t.TokenStore,this.corpusTokens=new t.SortedSet,this.eventEmitter=new t.EventEmitter,this._idfCache={},this.on("add","remove","update",function(){this._idfCache={}}.bind(this))},t.Index.prototype.on=function(){var t=Array.prototype.slice.call(arguments);return this.eventEmitter.addListener.apply(this.eventEmitter,t)},t.Index.prototype.off=function(t,e){return this.eventEmitter.removeListener(t,e)},t.Index.load=function(e){e.version!==t.version&&t.utils.warn("version mismatch: current "+t.version+" importing "+e.version);var n=new this;return n._fields=e.fields,n._ref=e.ref,n.documentStore=t.Store.load(e.documentStore),n.tokenStore=t.TokenStore.load(e.tokenStore),n.corpusTokens=t.SortedSet.load(e.corpusTokens),n.pipeline=t.Pipeline.load(e.pipeline),n},t.Index.prototype.field=function(t,e){var e=e||{},n={name:t,boost:e.boost||1};return this._fields.push(n),this},t.Index.prototype.ref=function(t){return this._ref=t,this},t.Index.prototype.add=function(e,n){var i={},o=new t.SortedSet,r=e[this._ref],n=void 0===n?!0:n;this._fields.forEach(function(n){var r=this.pipeline.run(t.tokenizer(e[n.name]));i[n.name]=r,t.SortedSet.prototype.add.apply(o,r)},this),this.documentStore.set(r,o),t.SortedSet.prototype.add.apply(this.corpusTokens,o.toArray());for(var s=0;s<o.length;s++){var a=o.elements[s],h=this._fields.reduce(function(t,e){var n=i[e.name].length;if(!n)return t;var o=i[e.name].filter(function(t){return t===a}).length;return t+o/n*e.boost},0);this.tokenStore.add(a,{ref:r,tf:h})}n&&this.eventEmitter.emit("add",e,this)},t.Index.prototype.remove=function(t,e){var n=t[this._ref],e=void 0===e?!0:e;if(this.documentStore.has(n)){var i=this.documentStore.get(n);this.documentStore.remove(n),i.forEach(function(t){this.tokenStore.remove(t,n)},this),e&&this.eventEmitter.emit("remove",t,this)}},t.Index.prototype.update=function(t,e){var e=void 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diff --git a/docs/_pages/search.md b/docs/_pages/search.md
new file mode 100644
index 00000000..443741b5
--- /dev/null
+++ b/docs/_pages/search.md
@@ -0,0 +1,5 @@
+---
+layout: search
+title: "Search"
+permalink: /search/
+---
diff --git a/test/_pages/search.md b/test/_pages/search.md
new file mode 100644
index 00000000..443741b5
--- /dev/null
+++ b/test/_pages/search.md
@@ -0,0 +1,5 @@
+---
+layout: search
+title: "Search"
+permalink: /search/
+---