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<?php
/**
* This helper builds the Attachment object for a /mail/send API call
*
* PHP Version - 5.6, 7.0, 7.1, 7.2
*
* @package SendGrid\Mail
* @author Elmer Thomas <dx@sendgrid.com>
* @copyright 2018 SendGrid
* @license https://opensource.org/licenses/MIT The MIT License
* @version GIT: <git_id>
* @link http://packagist.org/packages/sendgrid/sendgrid
*/
namespace SendGrid\Mail;
/**
* This class is used to construct a Attachment object for the /mail/send API call
*
* @package SendGrid\Mail
*/
class Attachment implements \JsonSerializable
{
/** @var $content string Base64 encoded content */
private $content;
/** @var $type string Mime type of the attachment */
private $type;
/** @var $filename string File name of the attachment */
private $filename;
/** @var $disposition string How the attachment should be displayed: inline or attachment, default is attachment */
private $disposition;
/** @var $content_id string Used when disposition is inline to diplay the file within the body of the email */
private $content_id;
/**
* Optional constructor
*
* @param string $content Base64 encoded content
* @param string $type Mime type of the attachment
* @param string $filename File name of the attachment
* @param string $disposition How the attachment should be displayed: inline
* or attachment, default is attachment
* @param string $content_id Used when disposition is inline to diplay the
* file within the body of the email
*/
public function __construct(
$content = null,
$type = null,
$filename = null,
$disposition = null,
$content_id = null
) {
if (isset($content)) {
$this->setContent($content);
}
if (isset($type)) {
$this->setType($type);
}
if (isset($filename)) {
$this->setFilename($filename);
}
if (isset($disposition)) {
$this->setDisposition($disposition);
}
if (isset($content_id)) {
$this->setContentID($content_id);
}
}
/**
* Add the content to a Attachment object
*
* @param string $content Base64 encoded content
*
* @throws TypeException
*/
public function setContent($content)
{
if (!is_string($content)) {
throw new TypeException('$content must be of type string.');
}
if (!$this->isBase64($content)) {
$this->content = base64_encode($content);
} else {
$this->content = $content;
}
}
/**
* Retrieve the content from a Attachment object
*
* @return string
*/
public function getContent()
{
return $this->content;
}
/**
* Add the mime type to a Attachment object
*
* @param string $type Mime type of the attachment
*
* @throws TypeException
*/
public function setType($type)
{
if (!is_string($type)) {
throw new TypeException('$type must be of type string.');
}
$this->type = $type;
}
/**
* Retrieve the mime type from a Attachment object
*
* @return string
*/
public function getType()
{
return $this->type;
}
/**
* Add the file name to a Attachment object
*
* @param string $filename File name of the attachment
*
* @throws TypeException
*/
public function setFilename($filename)
{
if (!is_string($filename)) {
throw new TypeException('$filename must be of type string');
}
$this->filename = $filename;
}
/**
* Retrieve the file name from a Attachment object
*
* @return string
*/
public function getFilename()
{
return $this->filename;
}
/**
* Add the disposition to a Attachment object
*
* @param string $disposition How the attachment should be displayed:
* inline or attachment, default is attachment
*
* @throws TypeException
*/
public function setDisposition($disposition)
{
if (!is_string($disposition)) {
throw new TypeException('$disposition must be of type string.');
}
$this->disposition = $disposition;
}
/**
* Retrieve the disposition from a Attachment object
*
* @return string
*/
public function getDisposition()
{
return $this->disposition;
}
/**
* Add the content id to a Attachment object
*
* @param string $content_id Used when disposition is inline to diplay
* the file within the body of the email
*/
public function setContentID($content_id)
{
if (!is_string($content_id)) {
throw new TypeException('$content_id must be of type string.');
}
$this->content_id = $content_id;
}
/**
* Retrieve the content id from a Attachment object
*
* @return string
*/
public function getContentID()
{
return $this->content_id;
}
/**
* Verifies whether or not the provided string is a valid base64 string
*
* @param $string string The string that has to be checked
* @return bool
*/
private function isBase64($string)
{
$decoded_data = base64_decode($string, true);
$encoded_data = base64_encode($decoded_data);
if ($encoded_data != $string) {
return false;
}
return true;
}
/**
* Return an array representing a Attachment object for the SendGrid API
*
* @return null|array
*/
public function jsonSerialize()
{
return array_filter(
[
'content' => $this->getContent(),
'type' => $this->getType(),
'filename' => $this->getFilename(),
'disposition' => $this->getDisposition(),
'content_id' => $this->getContentID()
],
function ($value) {
return $value !== null;
}
) ?: null;
}
}
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