added new direction 'changing'

closes #18

Author: gregor-j

src/Api/RemoteApi.php

@@ -57,6 +57,15 @@ public function getOutputElements(): array
         return $this->getElements(IApiElement::DIRECTION_OUTPUT);
     }
 
+    /**
+     * Get all direction changing values of the remote function.
+     * @return IApiElement[]
+     */
+    public function getChangingElements(): array
+    {
+        return $this->getElements(IApiElement::DIRECTION_CHANGING);
+    }
+
     /**
      * Get all tables of the remote function.
      * @return IApiElement[]

src/Api/Struct.php

@@ -65,7 +65,8 @@ protected function getAllowedDirections(): array
     {
         return [
             self::DIRECTION_INPUT,
-            self::DIRECTION_OUTPUT
+            self::DIRECTION_OUTPUT,
+            self::DIRECTION_CHANGING
         ];
     }
 

src/Api/Value.php

@@ -86,7 +86,8 @@ protected function getAllowedDirections(): array
     {
         return [
             self::DIRECTION_INPUT,
-            self::DIRECTION_OUTPUT
+            self::DIRECTION_OUTPUT,
+            self::DIRECTION_CHANGING
         ];
     }
 }