implement highlight feature

example/config.json

@@ -47,11 +47,27 @@
             {
                 "field_weights":
                 {
-                    "url": 100,
-                    "title": 200,
-                    "description": 300,
-                    "keywords": 400,
-                    "body": 500
+                    "url":100,
+                    "title":200,
+                    "description":300,
+                    "keywords":400,
+                    "body":500
+                }
+            },
+            "highlight":
+            {
+                "fields":
+                [
+                    "url",
+                    "title",
+                    "description",
+                    "keywords",
+                    "body"
+                ],
+                "options":
+                {
+                    "around":5,
+                    "limit":140
                 }
             }
         },

src/webui/search.php

@@ -169,6 +169,15 @@ foreach ($config->webui->search->options as $key => $value)
   }
 }
 
+// Apply highlight options
+if ($config->webui->search->highlight->fields)
+{
+  $query->highlight(
+    (array) $config->webui->search->highlight->fields,
+    (array) $config->webui->search->highlight->options
+  );
+}
+
 // Get found
 $found = empty($q) ? $total : $query->get()->getTotal();
 
@@ -433,19 +442,38 @@ $results = $query->offset($p * $config->webui->pagination->limit - $config->webu
 
           ?>
           <img src="<?php echo $icon ?>" title="<?php echo $hostname ?>" alt="identicon" />
-          <?php if (!empty($result->title)) { ?>
+          <?php if (!empty($result->getHighlight()['title'])) { ?>
+            <?php foreach ($result->getHighlight()['title'] as $title) { ?>
+              <div>
+                <h2><?php echo $title ?></h2>
+              </div>
+            <?php } ?>
+          <?php } else if (!empty($result->title)) { ?>
             <div>
               <h2><?php echo $result->title ?></h2>
             </div>
           <?php } ?>
-          <?php if (!empty($result->description)) { ?>
+          <?php if (!empty($result->getHighlight()['description'])) { ?>
+            <?php foreach ($result->getHighlight()['description'] as $description) { ?>
+              <div><?php echo $description ?></div>
+            <?php } ?>
+          <?php } else if (!empty($result->description)) { ?>
             <div><?php echo $result->description ?></div>
           <?php } ?>
-          <?php if (!empty($result->keywords)) { ?>
+          <?php if (!empty($result->getHighlight()['keywords'])) { ?>
+            <?php foreach ($result->getHighlight()['keywords'] as $keywords) { ?>
+              <div><?php echo $keywords ?></div>
+            <?php } ?>
+          <?php } else if (!empty($result->keywords)) { ?>
             <div>
               <?php echo $result->keywords ?>
             </div>
           <?php } ?>
+          <?php if (!empty($result->getHighlight()['body'])) { ?>
+            <?php foreach ($result->getHighlight()['body'] as $body) { ?>
+              <div><?php echo $body ?></div>
+            <?php } ?>
+          <?php } ?>
           <div>
             <a href="<?php echo $result->url ?>"><?php echo htmlentities(urldecode($result->url)) ?></a>
             <?php if (!in_array($result->get('code'), [0, 200])) { ?>