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 BulkGate Portal (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

PARAMETER NAME	VALUE	MANDATORY
status	See the table with delivery confirmation status	Yes
smsID	Unique smsID of a message	No
price	Price of SMS in credits	No
date	Sending and receiving time (CET timezone), e.g.: 1812141317;1812141318 (14th December 2018, 13:17 and 14th December 2018, 13:18)	No
from	Only if status=10, SenderID of incoming SMS in international format	No
message	Only if status=10, Text of incoming SMS in UTF-8 encoding	No

Example of the request

POST example.php HTTP/1.1
Host: portal.bulkgate.com
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

STATUS	DESCRIPTION
1	SMS successfully delivered
2	SMS buffered on SMSC. SMS will be delivered later. Recipient is unavailable.
3	SMS not delivered. Unknown/unavailable recipient.
10	Incoming SMS or SMS answer

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();