Product back Stock Alert to customer through SMS

Question

I need to send SMS (By using any SMS API) to customers when products are back in stock.

I have added my SMS API in Mage_ProductAlert_Model_Observer class under public_html/app/code/core/Mage/ProductAlert/Model/Observer.php file but its not sending SMS to customers. Why?

Also its only showing two customers details instead of all customers subscribed to product stock alert. Here is my code

 public function process()
    {
        $email = Mage::getModel('productalert/email');
        /* @var $email Mage_ProductAlert_Model_Email */
        $this->_processPrice($email);
        $this->_processStock($email);
        $this->_sendErrorEmail();

        return $this;

    $customer_stock_alerts = Mage::getModel('productalert/stock')->getCollection()->addStatusFilter(0)->setCustomerOrder();
    foreach ($customer_stock_alerts as $alert){
      $stock_back_product = $alert->getProductId();
      $current_product=Mage::getModel('catalog/product')->load($stock_back_product);
      $current_product_name = $current_product->getName();
      $customer_info = Mage::getModel('customer/customer')->load($alert->getCustomerId());
      $customer_name = $customer_info->getPrimaryBillingAddress()->getFirstname();
      $customer_mobile = $customer_info->getPrimaryBillingAddress()->getTelephone(); 
      $message = 0;     
      $message = "Dear $customer_name, Product $current_product_name is back in Stock";
      $message=urlencode($message);
      $sendsms = "http://api.msg91.com/api/sendhttp.php?sender=MSGIND&route=4&mobiles=$customer_mobile&authkey=xxxxxxxxxxxxxxxxxxx&country=91&message=$message";
      file_get_contents($sendsms);     
    }
    }

Can anyone share what's the issue this & why SMS is not sending?

Thanks.

Answer 1

The Magento core uses the method Mage_ProductAlert_Model_Observer::process() to send email alerts. You can either rewrite this class and connect it to your SMS API, or take the functionality of this class as an inspiration to setup your own class with custom configuration settings.

Answer 2

You can try checking this codebase as reference and follow it.

https://github.com/pmclain/module-twilio?files=1

Or

If you don't know how to rewrite use Magento 2 module generation tools like below to rewrite the classes. It will provide you a skeleton. Later you can change the logic accordingly.

1.http://mage2gen.com 2. http://www.silksoftware.com/magento-module-creator/magento2x.php