Bulk delivery confirmation of incoming messages

Delivery confirmation of incoming SMS (replies)

If you want to receive DLR entries to your application, just set up url address on Gretor SMS Panel (see picture below). Delivery confirmations are sent to the url address via HTTP POST method. Format (Content-Type) of the sent data is application/json. See the table of parameters.

Delivery confirmation: Parameters

Example of the request

POST example.php HTTP/1.1
Host: sms.gretor.net
Content-Type: application/json
Cache-Control: no-cache

[
   {
      "status":"1",
      "smsID":"3t2563af3ff285",
      "price":"0.71",
      "date":"1904111007;1904111011"
   },
   {
      "status":"2",
      "smsID":"2t2563af3ff285",
      "price":"0.71",
      "date":"1904111007;1904111011"
   },
   {
      "status":"10",
      "from":"420777777777",
      "text":"answer text",
   }
]

Delivery confirmation: Status

Script implementation example

<?php declare(strict_types=1);

class Delivery
{
    const STATUS_LIST = [
        0 => 'unknown',
        1 => 'delivered',
        2 => 'unavailable',
        3 => 'not_delivered'
    ];

    public function __construct()
    {
        try
        {
            foreach ($this->loadInput() as $key => $row)
            {
                if($row['type'] === 'answer')
                {
                    $this->inbox($row['from'], $row['message']);
                }
                else
                {
                    $this->delivery($row['smsID'], $row['status'], $row['price'], $row['send_time'], $row['delivery_time']);
                }
            }
        }
        catch (\Exception $e)
        {
            $this->log($e->getMessage(), 'error');

            exit(1);
        }
        exit(0);
    }

    public function inbox(string $from, string $message): void
    {
        $this->log(sprintf('From: [%s] Message: [%s]', $from, $message), 'inbox');
    }

    public function delivery(string $sms_id, string $status, float $price, \DateTime $send_time, \DateTime $delivery_time): void
    {
        $this->log(sprintf('Message ID [%s] is in the status [%s], Price: [%f], Time of sending: [%s], Delivery time: [%s]', $sms_id, $status, $price, $send_time->format('c'), $delivery_time->format('c')), 'delivery');
    }

    private function log(string $message, string $type): void
    {
        $message = '['.date('Y-m-d H-i-s').'] ' . $message . PHP_EOL;

        echo $message;
        file_put_contents(__DIR__."/$type.log", $message,FILE_APPEND);
    }

    private function loadInput(): iterable
    {
        $json = file_get_contents("php://input");

        if($json && is_string($json))
        {
            $data = json_decode($json, true, 512, JSON_BIGINT_AS_STRING);

            if ($error = json_last_error())
            {
                throw new \Exception(json_last_error_msg());
            }

            if(is_array($data))
            {
                foreach($data as $key => $row)
                {
                    if((int) ($row['status'] ?? 0) === 10)
                    {
                        yield $key => [
                            'type' => 'answer',
                            'from' => $row['from'] ?? '',
                            'message' => $row['message'] ?? ''
                        ];
                    }
                    else
                    {
                        [$send_time, $delivery_time] = array_pad(explode(';', $row['date'] ?? '0;0'), 2, 0);

                        yield $key => [
                            'type' => 'dlr',
                            'smsID' => $row['smsID'] ?? '',
                            'status' => self::STATUS_LIST[(int) ($row['status'] ?? 0)] ?? 'unknown',
                            'price' => (float) $row['price'] ?? 0.0,
                            'send_time' => new \DateTime('@'.(string) (int) $send_time),
                            'delivery_time' => new \DateTime('@'.(string) (int) $delivery_time),
                        ];
                    }
                }
            }
            else
            {
                throw new \Exception('Invalid input');
            }
        }
        else
        {
            throw new \Exception('Invalid input');
        }
    }
};

new \Delivery();