WHMCSnow integration with GatewayAPI.com

gatewayapi.php

<?php

// This is untested code
class smsGateway_gatewayapi {
    public $apifields = array(
        'apitoken' => array("FriendlyName" => "API Token", "Type" => "text", "Size" => "64", ),
        'senderid' => array("FriendlyName" => "Sender ID", "Type" => "text", "Size" => "15", ),
    );

    function sendSMSMessage() {
        $recipients = array_combine(explode(',',$this->mobile),explode(',',$this->clientlist));
        // $apifields settings above can be access via $this->settingname
        // $this->apiid $this->apiusers etc..
        // Other variables passed on from the SMS addon
        // $this->smsmethod to be used in the SMS log
        // $this->sms_body is the SMS body
        // $this->mobile is a comma separated list of mobile numbers
        // $this->clientlist is a comma separated list of client ID's (in the same order as $this->mobile
        // $this->unicode is set to true if a unicode message is trying to be sent

        foreach($recipients as $client_mobile => $client_id) {
            // Code to send SMS messages here
            $request = array(
                'recipients.0.msisdn' => $client_mobile,
                'sender' => $this->senderid,
                'message' => $this->sms_body,
                'token' => $this->apitoken,
                'userref' => $this->apiref,
            );
            if ($this->unicode) {
                $request['encoding'] = 'UCS2';
            }
            $response = sms_addon_curl("https://gatewayapi.com/rest/mtsms", $request);
            // apiresponse: response from SMS API (eg. The message was successfully accepted for delivery.)
            // apiref: A way to indentfy the SMS log entry, used for callbacks
            // smsstatus: 0 = Message did not send      1 = Message sent successfully     2 = Message in queue (for callbacks)
            try {
                $ids = json_decode($response, true);
                // Log result using the following query
                $log = array('clientid' => $client_id,
                    'mobilenumber' => $client_mobile,
                    'smsbody' => $this->sms_body,
                    'smsmethod' => $this->smsmethod,
                    'apiresponse' => $response,
                    'apiref' => implode(',', $ids['ids']),
                    'smsstatus' => '1'
                );
                sms_addon_smslogger($log, $this);
                return true;
            } catch (Exception $e) {
                // Log result using the following query
                $log = array('clientid' => $client_id,
                    'mobilenumber' => $client_mobile,
                    'smsbody' => $this->sms_body,
                    'smsmethod' => $this->smsmethod,
                    'apiresponse' => $response,
                    'apiref' =>  '',
                    'smsstatus' => '0'
                );
                sms_addon_smslogger($log, $this);
                return $e;
            }
        }
    }

    function smsBalance() { // Remove this function if balance isn't supported by SMS Gateway API
        // Code to get balance from API
        try {
            $response = sms_addon_curl("https://gatewayapi.com/rest/me",array('apitoken' => $this->apitoken));
            $data = json_decode($response, true);
            return $data['credit'];
        } catch (Exception $e) {
            return false;
        }
    }
}