fix extended syntax request processing

src/library/sphinx.php

@@ -4,28 +4,28 @@ class Sphinx {
 
   private $_sphinx;
 
-  public function __construct(string $host, int $port) {
+  public function __construct(string $host, int $port)
-
+  {
     $this->_sphinx = new PDO('mysql:host=' . $host . ';port=' . $port . ';charset=utf8', false, false, [PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8']);
     $this->_sphinx->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
     $this->_sphinx->setAttribute(PDO::ATTR_DEFAULT_FETCH_MODE, PDO::FETCH_OBJ);
   }
 
-  public function searchMagnetsTotal(string $keyword) {
+  public function searchMagnetsTotal(string $keyword) : int
-
+  {
     $query = $this->_sphinx->prepare('SELECT COUNT(*) AS `total` FROM `magnet` WHERE MATCH(?)');
 
     $query->execute(
       [
-        $keyword
+        self::_match($keyword)
       ]
     );
 
     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)
-
+  {
     $query = $this->_sphinx->prepare("SELECT *
 
                                       FROM `magnet`
@@ -40,10 +40,34 @@ class Sphinx {
 
     $query->execute(
       [
-        $keyword
+        self::_match($keyword)
       ]
     );
 
     return $query->fetchAll();
   }
+
+  private static function _match(string $keyword) : string
+  {
+    $keyword = trim($keyword);
+
+    if (empty($keyword))
+    {
+      return $keyword;
+    }
+
+    $keyword = str_replace(['"'], ' ', $keyword);
+    $keyword = preg_replace('/[\W]/ui', ' ', $keyword);
+    $keyword = preg_replace('/[\s]+/ui', ' ', $keyword);
+    $keyword = trim($keyword);
+
+    $result = [];
+
+    foreach ((array) explode(' ', $keyword) as $value)
+    {
+      $result[] = sprintf('@"*%s*"', $value);
+    }
+
+    return implode(' | ', $result);
+  }
 }