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<?php |
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namespace NotificationChannels\Gammu; |
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class GammuMessage |
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{ |
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const VERSION = '0.0.1'; |
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/** |
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* @var array Params payload. |
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*/ |
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public $payload = []; |
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/** |
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* @var array Multipart chunks. |
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*/ |
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public $multiparts = []; |
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/** |
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* @param string $content |
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* |
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* @return static |
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*/ |
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public static function create($content = '') |
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{ |
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return new static($content); |
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} |
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/** |
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* Create a new message instance. |
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* |
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* @param string $content |
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*/ |
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public function __construct($content = '') |
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{ |
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$this->content($content); |
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$this->payload['CreatorID'] = class_basename($this).'/'.self::VERSION; |
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$this->payload['MultiPart'] = 'false'; |
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} |
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/** |
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* Destination phone number. |
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* |
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* @param $phoneNumber |
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* |
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* @return $this |
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*/ |
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public function to($phoneNumber) |
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{ |
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$this->payload['DestinationNumber'] = $phoneNumber; |
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return $this; |
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} |
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/** |
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* SMS message. |
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* |
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* @param $content |
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* |
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* @return $this |
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*/ |
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public function content($content) |
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{ |
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// Check if long SMS |
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if (strlen($content) > 160) { |
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$this->parseLongMessage($content); |
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} else { |
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$this->payload['TextDecoded'] = $content; |
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} |
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return $this; |
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} |
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/** |
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* Sender Phone ID. |
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* |
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* @param $phoneId |
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* |
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* @return $this |
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*/ |
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public function sender($phoneId = null) |
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{ |
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$this->payload['SenderID'] = $phoneId; |
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return $this; |
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} |
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/** |
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* Determine if Sender Phone ID is not given. |
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* |
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* @return bool |
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*/ |
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public function senderNotGiven() |
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{ |
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return ! isset($this->payload['SenderID']); |
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} |
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/** |
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* Determine if Destination Phone Number is not given. |
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* |
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* @return bool |
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*/ |
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public function destinationNotGiven() |
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{ |
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return ! isset($this->payload['DestinationNumber']); |
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} |
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/** |
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* Returns params payload. |
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* |
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* @return array |
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*/ |
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public function toArray() |
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{ |
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return $this->payload; |
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} |
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/** |
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* Returns multipart chunks. |
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* |
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* @return array |
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*/ |
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public function getMultipartChunks() |
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{ |
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return $this->multiparts; |
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} |
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/** |
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* Generate UDH part for long SMS. |
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* |
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* @link https://en.wikipedia.org/wiki/Concatenated_SMS#Sending_a_concatenated_SMS_using_a_User_Data_Header |
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* |
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* @return string |
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*/ |
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protected function generateUDH($total = 2, $sequence = 2, $ref = 0) |
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{ |
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// Length of User Data Header, in this case 05 |
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$octet_1 = '05'; |
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// Information Element Identifier, equal to 00 (Concatenated short messages, 8-bit reference number) |
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$octet_2 = '00'; |
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// Length of the header, excluding the first two fields; equal to 03 |
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$octet_3 = '03'; |
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// CSMS reference number, must be same for all the SMS parts in the CSMS |
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$octet_4 = str_pad(dechex($ref), 2, '0', STR_PAD_LEFT); |
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// Total number of parts |
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$octet_5 = str_pad(dechex($total), 2, '0', STR_PAD_LEFT); |
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// Part sequence |
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$octet_6 = str_pad(dechex($sequence), 2, '0', STR_PAD_LEFT); |
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$udh = implode('', [ |
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$octet_1, $octet_2, $octet_3, $octet_4, $octet_5, $octet_6, |
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]); |
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return strtoupper($udh); |
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} |
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protected function parseLongMessage($content) |
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{ |
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// Parse message to chunks |
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// @ref: http://www.nowsms.com/long-sms-text-messages-and-the-160-character-limit |
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$messages = str_split($content, 153); |
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$messages = collect($messages); |
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$messages_count = $messages->count(); |
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// Get first message |
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$firstChunk = $messages->shift(); |
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// Generate UDH |
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$ref = mt_rand(0, 255); |
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$i = 1; |
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$firstUDH = $this->generateUDH($messages_count, $i, $ref); |
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++$i; |
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$this->payload['TextDecoded'] = $firstChunk; |
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$this->payload['UDH'] = $firstUDH; |
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$this->payload['MultiPart'] = 'true'; |
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foreach ($messages as $chunk) { |
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array_push($this->multiparts, [ |
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'UDH' => $this->generateUDH($messages_count, $i, $ref), |
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'TextDecoded' => $chunk, |
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'SequencePosition' => $i, |
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]); |
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++$i; |
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} |
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return $this; |
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} |
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} |
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laravel-notification-channels /
gammu
