title: Add custom Product data dynamically as item meta data on the Order
body: <p>Is it possible to add a metadata on a product which is inside the Order?</p>
  
  <p>In this case, there would be one metadata but each product (in the order) would have different value.
  Example:</p>
  
  <pre><code>Order 1:
       * Product 1 
       Sample Meta: Meta1
  
       * Product 2
       Sample Meta: Meta2
  </code></pre>
  
  <p>Thanks.</p>
  
  <hr>
  
  <p><strong>Update1 :</strong> </p>
  
  <p>I'm now stuck on how would I grab the values from the <code>woocommerce_add_cart_item_data</code> filter. I was able to successfully add the meta data from there.</p>
  
  <p>I need to grab those values for me to use in this <code>woocommerce_add_order_item_meta</code> action hook.</p>
  
  <p>This is how I successfully added the metadata to the filter:</p>
  
  <pre><code>function add_cart_item_data( $cart_item_data, $product_id ) {
      $cart_item_data[ "meta1" ] = $_POST["meta1"];  
      $cart_item_data[ "meta2" ] = $_POST["meta2"]; 
      return $cart_item_data;
  }
  add_filter( 'woocommerce_add_cart_item_data', 'add_cart_item_data', 99, 2 );
  </code></pre>