opencart-automation-suite/install.xml

<?xml version="1.0" encoding="utf-8"?>
<modification>
    <name><![CDATA[Automation Suite]]></name>
    <code>automation-suite</code>
    <author><![CDATA[<b style="color: green">MY-Dev | </b><b>Mohamed Youssef</b>]]></author>
    <link>https://my-dev.pro</link>
    <version>1.0.0</version>

    <file path="catalog/model/checkout/order.php">
        <operation error="skip">
            <search><![CDATA[$this->db->query("UPDATE " . DB_PREFIX . "product SET quantity = (quantity - " . (int)$order_product['quantity'] . ") WHERE product_id = '" . (int)$order_product['product_id'] . "' AND subtract = '1'");]]></search>
            <add position="replace"><![CDATA[$this->db->query("UPDATE " . DB_PREFIX . "product SET quantity = (quantity - " . (int)$order_product['quantity'] . "), status = IF(quantity <= 0, 0, status) WHERE product_id = '" . (int)$order_product['product_id'] . "' AND subtract = '1'");]]></add>
        </operation>
        <operation error="skip">
            <search><![CDATA[$this->db->query("UPDATE `" . DB_PREFIX . "product` SET quantity = (quantity + " . (int)$order_product['quantity'] . ") WHERE product_id = '" . (int)$order_product['product_id'] . "' AND subtract = '1'");]]></search>
            <add position="replace"><![CDATA[$this->db->query("UPDATE `" . DB_PREFIX . "product` SET quantity = (quantity + " . (int)$order_product['quantity'] . "), status = IF((quantity + " . (int)$order_product['quantity'] . ") > 0, 1, status) WHERE product_id = '" . (int)$order_product['product_id'] . "' AND subtract = '1'");]]></add>
        </operation>
    </file>

    <file path="">
        <operation error="skip">
            <search><![CDATA[]]></search>
            <add position=""><![CDATA[]]></add>
        </operation>
    </file>

</modification>