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<?php |
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namespace Tgallice\FBMessenger\Model\Generic; |
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use Tgallice\FBMessenger\Model\Button; |
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class Element implements \JsonSerializable |
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{ |
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/** |
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* @var string |
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*/ |
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private $title; |
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/** |
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* @var null|string |
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*/ |
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private $itemUrl; |
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/** |
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* @var null|string |
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*/ |
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private $imageUrl; |
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/** |
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* @var null|string |
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*/ |
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private $subtitle; |
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/** |
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* @var null|Button[] |
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*/ |
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private $buttons; |
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/** |
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* @param string $title |
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* @param null|string $itemUrl |
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* @param null|string $imageUrl |
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* @param null|string $subtitle |
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* @param null|Button[] $buttons |
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*/ |
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public function __construct($title, $itemUrl = null, $imageUrl = null, $subtitle = null, array $buttons = null) |
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{ |
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$this->title = $title; |
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$this->itemUrl = $itemUrl; |
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$this->imageUrl = $imageUrl; |
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$this->subtitle = $subtitle; |
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$this->buttons = $buttons; |
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$this->validateElement(); |
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} |
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/** |
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* @return string |
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*/ |
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public function getTitle() |
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{ |
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return $this->title; |
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} |
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/** |
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* @return null|string |
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*/ |
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public function getItemUrl() |
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{ |
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return $this->itemUrl; |
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} |
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/** |
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* @return null|string |
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*/ |
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public function getImageUrl() |
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{ |
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return $this->imageUrl; |
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} |
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/** |
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* @return null|string |
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*/ |
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public function getSubtitle() |
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{ |
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return $this->subtitle; |
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} |
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/** |
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* @return null|Button[] |
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*/ |
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public function getButtons() |
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{ |
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return $this->buttons; |
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} |
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/** |
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* @return array |
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*/ |
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public function jsonSerialize() |
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{ |
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return [ |
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'title' => $this->title, |
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'item_url' => $this->itemUrl, |
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'image_url' => $this->imageUrl, |
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'subtitle' => $this->subtitle, |
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'buttons' => $this->buttons, |
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]; |
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} |
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private function validateElement() |
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{ |
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if (strlen($this->title) > 45) { |
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throw new \InvalidArgumentException('In a generic element, the "title" field should not exceed 45 characters'); |
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} |
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if (!empty($this->subtitle) && strlen($this->subtitle) > 80) { |
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throw new \InvalidArgumentException('In a generic element, the "subtitle" field should not exceed 80 characters'); |
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} |
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if (count($this->buttons) > 3) { |
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throw new \InvalidArgumentException('A generic element can not have more than 3 buttons'); |
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} |
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} |
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} |
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tgallice /
fb-messenger-sdk
