Set product in stock and change the status to Enabled if qty is equals or greater than 1

Question

I'm trying to do this for a while, but there's something isn't right about this, I've tried to put it in stock and enable it but nothing is working for me, can someone give me a hint or pinpoint me to the issue?

<?xml version="1.0"?>
<config>
  <modules>
    <Mr_StockEnhancements>
      <version>1.0.0</version>
    </Mr_StockEnhancements>
  </modules>
  <global>
    <models>
      <mr_stockenhancements>
        <class>Mr_StockEnhancements_Model</class>
      </mr_stockenhancements>
    </models>
    <events>
      <catalog_product_prepare_save>
        <observers>
          <Mr_StockEnhancements_Model_Observer>
            <type>singleton</type>
            <class>Mr_StockEnhancements_Model_Observer</class>
            <method>stockEnhancements</method>
          </Mr_StockEnhancements_Model_Observer>
        </observers>
      </catalog_product_prepare_save>
    </events>
  </global>

</config>

And here's the observer:

class Mr_StockEnhancements_Model_Observer {

public function stockEnhancements(Varien_Event_Observer $observer) {

        $product   = $observer->getProduct();
        $stockData = $product->getStockData();

        //make sure stock qty is greater than zero.
        if (isset($stockData['qty']) && $stockData['qty'] >= 1) {

            $product->setStockData['is_in_stock'] = 1; //update to instock
            Mage::getSingleton('catalog/product_action')
            ->updateAttributes(array($product->getId()), array('status' => Mage_Catalog_Model_Product_Status::STATUS_ENABLED), $storeId);

            print_r($stockData['qty'], $product->StockData['is_in_stock']);
            exit;

        } else {
            Mage::getModel('catalog/product_status')->updateProductStatus($product->getProductId(), $storeId, Mage_Catalog_Model_Product_Status::STATUS_DISABLED);
        }
    }
 }

Answer 1

You should use this observer on catalog_product_save_after event , replace your <catalog_product_prepare_save> tags in your xml to <catalog_product_save_after>

EDIT :

I think you've forgot to call $product->save() , so you should add it in the end of the code before print_r

EDIT 2

Also your stock update code doesn't seem right .. Use following code ;

$stockItem = Mage::getModel('cataloginventory/stock_item');
$stockItem->assignProduct($product);
$stockItem->setData('is_in_stock', 1);
$stockItem->setData('qty', 1);
$product->setStockItem($stockItem);

Answer 2

Try this code.

    $productData = $observer->getProduct();
    $product = Mage::getModel('catalog/product')->load($productData->getId());
    $stock = Mage::getModel('cataloginventory/stock_item')->loadByProduct($product);
    $stockQty = $stock->getQty();
    if($stockQty>1){
    $stock->setManageStock(1)
          ->setUseConfigManageStock(1)
          ->setIsInStock(1);
     Mage::app()->setCurrentStore(Mage_Core_Model_App::ADMIN_STORE_ID);
     $stock->save();
  }