implement similar magnets feature

src/library/sphinx.php

@@ -11,20 +11,20 @@ class Sphinx {
     $this->_sphinx->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_OBJ);
   }
 
-  public function searchMagnetsTotal(string $keyword) : int
+  public function searchMagnetsTotal(string $keyword, string $mode = 'default') : int
   {
     $query = $this->_sphinx->prepare('SELECT COUNT(*) AS `total` FROM `magnet` WHERE MATCH(?)');
 
     $query->execute(
       [
-        self::_match($keyword)
+        self::_match($keyword, $mode)
       ]
     );
 
     return $query->fetch()->total;
   }
 
-  public function searchMagnets(string $keyword, int $start, int $limit, int $maxMatches)
+  public function searchMagnets(string $keyword, int $start, int $limit, int $maxMatches, string $mode = 'default')
   {
     $query = $this->_sphinx->prepare("SELECT *
 
@@ -40,14 +40,14 @@ class Sphinx {
 
     $query->execute(
       [
-        self::_match($keyword)
+        self::_match($keyword, $mode)
       ]
     );
 
     return $query->fetchAll();
   }
 
-  private static function _match(string $keyword) : string
+  private static function _match(string $keyword, string $mode = 'default') : string
   {
     $keyword = trim($keyword);
 
@@ -61,6 +61,38 @@ class Sphinx {
     $keyword = preg_replace('/[\s]+/ui', ' ', $keyword);
     $keyword = trim($keyword);
 
+    switch ($mode)
+    {
+      case 'similar':
+
+        $result = [];
+
+        foreach ((array) explode(' ', $keyword) as $i => $value)
+        {
+          if (mb_strlen($value) > 5)
+          {
+            $result[] = sprintf('@metaTitle "%s" | @dn "%s"', $value, $value);
+
+            if ($i > 3)
+            {
+              break;
+            }
+          }
+        }
+
+        if (empty($result))
+        {
+          return '*';
+        }
+        else
+        {
+          return implode(' | ', $result);
+        }
+
+      break;
+
+      default:
+
         $result = [];
 
         foreach ((array) explode(' ', $keyword) as $value)
@@ -71,3 +103,4 @@ class Sphinx {
         return implode(' | ', $result);
     }
   }
+}

src/public/magnet.php

@@ -2,10 +2,23 @@
 
 // Load dependencies
 require_once (__DIR__ . '/../config/app.php');
+require_once (__DIR__ . '/../library/sphinx.php');
 require_once (__DIR__ . '/../library/database.php');
 require_once (__DIR__ . '/../library/time.php');
 require_once (__DIR__ . '/../../vendor/autoload.php');
 
+// Connect Sphinx
+try {
+
+  $sphinx = new Sphinx(SPHINX_HOST, SPHINX_PORT);
+
+} catch(Exception $e) {
+
+  var_dump($e);
+
+  exit;
+}
+
 // Connect database
 try {
 
@@ -358,6 +371,37 @@ echo '<?xml version="1.0" encoding="UTF-8"?>' . PHP_EOL ?>
                     </span>
                   </div>
                 </div>
+                <?php if ($similarMagnetsTotal = $sphinx->searchMagnetsTotal($magnet->metaTitle ? $magnet->metaTitle : $magnet->dn, 'similar')) { ?>
+                  <?php if ($similarMagnetsTotal > 1) { // skip current magnet ?>
+                    <div class="padding-y-8 padding-x-16">
+                      <a name="similar"></a>
+                      <h3><?php echo _('Similar') ?></h3>
+                    </div>
+                    <div class="padding-x-16 margin-b-8">
+                      <div class="padding-16 margin-t-8 border-radius-3 background-color-night">
+                        <?php foreach ( $sphinx->searchMagnets(
+                                        $magnet->metaTitle ? $magnet->metaTitle : $magnet->dn,
+                                        0,
+                                        10,
+                                        $similarMagnetsTotal,
+                                        'similar'
+                                      ) as $result) { ?>
+                          <?php if ($magnet = $db->getMagnet($result->magnetid)) { ?>
+                            <?php if ($result->magnetid != $response->magnet->magnetId && // skip current magnet
+                                      ($response->user->address == $db->getUser($magnet->userId)->address ||
+                                       in_array($response->user->address, MODERATOR_IP_LIST) || ($magnet->approved && $magnet->public))) { ?>
+                              <div class="margin-y-8">
+                                <a href="<?php echo sprintf('%s/magnet.php?magnetId=%s', WEBSITE_URL, $magnet->magnetId) ?>" class="margin-b-16">
+                                  <?php echo nl2br(htmlentities($magnet->metaTitle ? $magnet->metaTitle : $magnet->dn)) ?>
+                                </a>
+                              </div>
+                            <?php } ?>
+                          <?php } ?>
+                        <?php } ?>
+                      </div>
+                    </div>
+                  <?php } ?>
+                <?php } ?>
                 <?php if ($response->magnet->comments) { ?>
                   <div class="padding-y-8 padding-x-16">
                     <a name="comment"></a>