Make converter param name case insensitive (#43)

Author: laurynas-convertapi

lib/ConvertApi/Task.php

@@ -31,8 +31,9 @@ function run()
         }
 
         $fromFormat = $this->fromFormat ?: $this->detectFormat($params);
-        $converter = isset($params['converter']) ? "/converter/{$params['converter']}" : '';
-        $path = 'convert/' . $fromFormat . '/to/' . $this->toFormat . $converter;
+        $converter = $this->detectConverter($params);
+        $converterPath = $converter ? "/converter/{$converter}" : '';
+        $path = 'convert/' . $fromFormat . '/to/' . $this->toFormat . $converterPath;
 
         $response = ConvertApi::client()->post($path, $params, $readTimeout);
 
@@ -91,4 +92,15 @@ private function detectFormat($params)
 
         return $detector->run();
     }
+
+    private function detectConverter($params)
+    {
+        $keys = array_keys($params);
+
+        foreach ($keys as $key)
+            if (strtolower($key) == 'converter')
+                return $params[$key];
+
+        return;
+    }
 }