Offload all model generation to model output

Signed-off-by: Justin Georgi <justin.georgi@gmail.com>

includes/GlModelHandler.php

@@ -2,6 +2,7 @@
 namespace MediaWiki\Extension\GlModelViewer;
 
 use ImageHandler;
+use Html;
 
 class GlModelHandler extends ImageHandler {
   /**
@@ -35,16 +36,25 @@ class GlModelHandler extends ImageHandler {
    * @return MediaTransformOutput
    */
   public function doTransform($image, $dstPath, $dstUrl, $params, $flags = 0) {
-    echo '<script>';
-    self::console_log($image);
-    self::console_log($dstPath);
-    self::console_log($dstUrl);
-    self::console_log($params);
-    self::console_log($flags);
-    echo '</script>';
+    return new GlModelTransformOutput($image, $params);
+  }
 
-    return new GlModelTransformOutput($image, ['type' => 'glb']);
-   }
+  /**
+   * Check the incoming media parameters
+   * 
+	 * @param string $name
+	 * @param string $value
+	 * @return bool
+	 */
+	public function validateParam( $name, $value ) {
+    if (in_array($name, ['width', 'height'])) {
+      return $value > 0;
+    } else if (in_array($name, ['view', 'hsset'])) {
+      return true;
+    } else {
+      return false;
+    }
+  }
 
   /**
    * Small helper function to display information on the browser console