typehead search button and improve article excerpt

common/helpers/StringHelper.php

@@ -0,0 +1,68 @@
+<?php
+namespace common\helpers;
+
+use yii\helpers\BaseStringHelper;
+/**
+ * StringHelper
+ *
+ * @author Qiang Xue <[email protected]>
+ * @author Alex Makarov <[email protected]>
+ * @since 2.0
+ */
+class StringHelper extends BaseStringHelper
+{
+
+	public static function  Excerpt($string, $lines, $suffix, $wordsPerLine=80, $encoding = false)
+	{
+		return static::truncateHtml($string, $lines, $suffix, $wordsPerLine, $encoding);
+	}
+
+	protected static function truncateHtml($string, $count, $suffix, $wordsPerLine, $encoding)
+	{
+		$config = \HTMLPurifier_Config::create(null);
+		$config->set('Cache.SerializerPath', \Yii::$app->getRuntimePath());
+		$lexer = \HTMLPurifier_Lexer::create($config);
+		$tokens = $lexer->tokenizeHTML($string, $config, null);
+		$openTokens = 0;
+		$totalCount = 0;
+		$truncated = [];
+		foreach ($tokens as $token) {
+			if ($token instanceof \HTMLPurifier_Token_Start) { //Tag begins
+				$openTokens++;
+				$truncated[] = $token;
+			} elseif ($token instanceof \HTMLPurifier_Token_Text && $totalCount <= $count) { //Text
+				if (false === $encoding) {
+					$token->data = self::truncateWords($token->data, ($count - $totalCount)*$wordsPerLine, '');
+					$currentWords = str_word_count($token->data);
+				} else {
+					$token->data = self::truncate($token->data, ($count - $totalCount)*$wordsPerLine, '', $encoding) . ' ';
+					$currentWords = mb_strlen($token->data, $encoding);
+				}
+				//$totalCount += $currentWords;
+				if(!$token->is_whitespace)
+					$totalCount += intval(ceil($currentWords/$wordsPerLine));//turn into lines
+				if (1 === $currentWords) {
+					$token->data = ' ' . $token->data;
+				}
+				$truncated[] = $token;
+			} elseif ($token instanceof \HTMLPurifier_Token_End) { //Tag ends
+				$openTokens--;
+				$truncated[] = $token;
+			} elseif ($token instanceof \HTMLPurifier_Token_Empty) { //Self contained tags, i.e. <img/> etc.
+				if($token->name=='img')
+				{
+					//filter img tag
+				}
+				else
+					$truncated[] = $token;
+			}
+			if (0 === $openTokens && $totalCount >= $count) {
+				break;
+			}
+		}
+		$context = new \HTMLPurifier_Context();
+		$generator = new \HTMLPurifier_Generator($config, $context);
+		return $generator->generateFromTokens($truncated) . $suffix;
+	}
+
+}

composer.json

@@ -47,7 +47,9 @@
     "bower-asset/font-awesome": "^4.0",
     "bower-asset/html5shiv": "^3.0",
     "bower-asset/jquery-slimscroll": "^1.3",
-    "bower-asset/flot": "^0.8"
+    "bower-asset/flot": "^0.8",
+
+    "kartik-v/yii2-widgets": "*",
   },
   "require-dev": {
     "yiisoft/yii2-debug": "^2.0.0",

frontend/controllers/ArticleController.php

@@ -7,7 +7,7 @@
 use frontend\models\search\ArticleSearch;
 use yii\web\Controller;
 use yii\web\NotFoundHttpException;
-
+use yii\helpers\Json;
 /**
  * @author Eugene Terentev <[email protected]>
  */
@@ -25,7 +25,7 @@ public function actionIndex()
         ];
         return $this->render('index', ['dataProvider'=>$dataProvider]);
     }
-
+    
     /**
      * @param $slug
      * @return string
@@ -54,4 +54,20 @@ public function actionAttachmentDownload($id)
             $model->name
         );
     }
+
+    public function actionSearchList($q = null) {
+
+    	$out = [];
+    	if($q){
+    		$query = Article::find()->where(['LIKE', 'title', $q])->orWhere(['LIKE', 'body', $q]);
+    		$data=$query->limit(10)->all();
+    	}
+
+    	foreach ($data as $d) {
+    		$out[] = ['value' => $d['title']];
+    	}
+    	echo Json::encode($out);
+    }
+
+
 }

frontend/models/search/ArticleSearch.php

@@ -42,6 +42,19 @@ public function search($params)
         $dataProvider = new ActiveDataProvider([
             'query' => $query,
         ]);
+
+        //q=word
+        if(!empty($params['q']))
+        {
+        	$q=$params['q'];
+        	//$q="��";
+        	//$query2=Article::find();
+        	//$query2->andWhere(['LIKE', 'title', $q]);
+        	//$t=$query2->all();
+
+        	$query->andWhere(['LIKE', 'title', $q])->orWhere(['LIKE', 'body', $q]);
+        	return $dataProvider;
+        }
 
         if (!($this->load($params) && $this->validate())) {
             return $dataProvider;

frontend/views/article/_item.php

@@ -4,7 +4,8 @@
  * @var $model common\models\Article
  */
 use yii\helpers\Html;
-
+use Symfony\Component\DomCrawler\Crawler;
+use common\helpers\StringHelper;
 ?>
 <hr/>
 <div class="article-item row">
@@ -35,7 +36,10 @@
                 ) ?>
             <?php endif; ?>
             <div class="article-text">
-                <?php echo \yii\helpers\StringHelper::truncate($model->body, 150, '...', null, true) ?>
+                <?php
+                	//excerpt 5 lines and filter img
+                	echo StringHelper::Excerpt($model->body, 5, '...', 90, Yii::$app->charset);
+                ?>
             </div>
         </div>
     </div>

frontend/views/article/_typehead.php

@@ -0,0 +1,43 @@
+<?php
+use yii\helpers\Html;
+//use yii\bootstrap\ActiveForm;
+use kartik\form\ActiveForm;
+use kartik\widgets\Typeahead;
+use yii\helpers\Url;
+?>
+
+<div class="system-article-search">
+    <?php 
+		$form = ActiveForm::begin([
+        'action' => ['index'],
+        'method' => 'get',
+		'type' => ActiveForm::TYPE_INLINE,
+    	]); 
+	?>
+
+<div class="input-group pull-right">
+	<span class="input-group-btn">
+    <?php 
+	echo Typeahead::widget([
+    'name' => 'q',
+    'options' => ['placeholder' => 'search articles...'],
+    'scrollable' => true,
+    'pluginOptions' => ['highlight'=>true],
+    'dataset' => [
+        [
+            'datumTokenizer' => "Bloodhound.tokenizers.obj.whitespace('value')",
+            'display' => 'value',
+            //'prefetch' => $baseUrl . '/samples/countries.json',
+            'remote' => [
+                'url' => Url::to(['article/search-list']) . '?q=%QUERY',
+                'wildcard' => '%QUERY'
+            ]
+        ]
+    ]
+]);
+    ?>
+	</span>
+	<?php echo  Html::submitButton(Yii::t('backend', 'Search'), ['class' => 'btn btn-primary']) ?>
+</div>   
+    <?php ActiveForm::end(); ?>
+</div>

frontend/views/article/index.php

@@ -2,6 +2,7 @@
 /* @var $this yii\web\View */
 $this->title = Yii::t('frontend', 'Articles')
 ?>
+<?php echo $this->render('_typehead');?>
 <div id="article-index">
     <h1><?php echo Yii::t('frontend', 'Articles') ?></h1>
     <?php echo \yii\widgets\ListView::widget([

frontend/views/article/view.php

@@ -5,6 +5,9 @@
 $this->params['breadcrumbs'][] = ['label' => Yii::t('frontend', 'Articles'), 'url' => ['index']];
 $this->params['breadcrumbs'][] = $this->title;
 ?>
+
+<?php echo $this->render('_typehead'); ?>
+
 <div class="content">
     <article class="article-item">
         <h1><?php echo $model->title ?></h1>