- refactored scraper filter function

- added ability to specify default scrapers in environment variables

data/config.php

@@ -22,6 +22,13 @@ class config{
 	
 	// Enable the API?
 	const API_ENABLED = true;
+
+    // Default scrapers
+    const SCRAPER_WEB = "ddg";
+    const SCRAPER_IMAGES = "ddg";
+    const SCRAPER_NEWS = "ddg";
+    const SCRAPER_VIDEOS = "yt";
+    const SCRAPER_MUSIC = "sc";
 	
 	//
 	// BOT PROTECTION