Updating downloader function

Took 40 minutes

Downloader.php

@@ -1,13 +1,54 @@
 <?php
 class Downloader
 {
+    private static $loggedIn = false;
+
+    public function __construct()
+    {
+        if( !self::$loggedIn )
+        {
+            $this->login();
+        }
+    }
+
+    private function login( )
+    {
+        $ch = curl_init();
+
+        curl_setopt( $ch, CURLOPT_URL, "http://usdb.animux.de/index.php?&link=home" );
+        curl_setopt( $ch, CURLOPT_POST, 1 );
+        curl_setopt( $ch, CURLOPT_COOKIEFILE, DOWNLOAD_PATH . '/cookies.txt' );
+        curl_setopt( $ch, CURLOPT_COOKIEJAR, DOWNLOAD_PATH . '/cookies.txt' );
+        // In real life you should use something like:
+        curl_setopt( $ch, CURLOPT_POSTFIELDS,
+            http_build_query(
+                array(
+                    'user' => 'trump@whitehouse.gov',
+                    'userpass3' => 'C7AFvca6Ri6VhZL'
+                ) ) );
+
+        // Receive server response ...
+        curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );
+
+        $out = curl_exec( $ch );
+
+        if( strpos( $out, 'Datensatz nicht gefunden' ) !== false )
+        {
+            echo "Not found - Skip\n";
+            curl_close( $ch );
+            return false;
+        }
+        curl_close( $ch );
+        echo "OK\n";
+    }
+
     /**
      * @param int $a_id
      *
      * @return bool
      * @throws Exception
      */
-    public function requestSong( int $a_id )
+    public function requestSong( int $a_id ): ?bool
     {
         if( ( $out = $this->downloadFile( $a_id ) ) === false )
         {