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<?php |
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namespace NotificationChannels\Facebook\Components; |
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use NotificationChannels\Facebook\Enums\ButtonType; |
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use NotificationChannels\Facebook\Exceptions\CouldNotCreateButton; |
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class Button implements \JsonSerializable |
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{ |
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/** @var string Button Title */ |
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protected $title; |
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/** @var string Button Type */ |
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protected $type; |
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/** @var string|array Button URL, Postback Data or Phone Number */ |
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protected $data; |
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/** @var array Payload */ |
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protected $payload = []; |
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/** |
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* Create a button. |
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* |
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* @param string $title |
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* @param string|array $data |
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* @param string $type |
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* |
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* @return static |
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*/ |
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public static function create($title = '', $data = null, $type = ButtonType::WEB_URL) |
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{ |
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return new static($title, $data, $type); |
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} |
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/** |
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* Button Constructor. |
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* |
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* @param string $title |
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* @param string|array $data |
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* @param string $type |
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*/ |
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public function __construct($title = '', $data = null, $type = ButtonType::WEB_URL) |
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{ |
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$this->title = $title; |
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$this->data = $data; |
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$this->payload['type'] = $type; |
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} |
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/** |
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* Set Button Title. |
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* |
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* @param $title |
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* |
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* @return $this |
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* @throws CouldNotCreateButton |
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*/ |
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public function title($title) |
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{ |
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if ($this->isNotSetOrEmpty($title)) { |
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throw CouldNotCreateButton::titleNotProvided(); |
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} elseif (mb_strlen($title) > 20) { |
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throw CouldNotCreateButton::titleLimitExceeded($title); |
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} |
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$this->payload['title'] = $title; |
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return $this; |
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} |
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/** |
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* Set a URL for the button. |
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* |
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* @param $url |
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* |
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* @return $this |
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* @throws CouldNotCreateButton |
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*/ |
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public function url($url) |
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{ |
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if ($this->isNotSetOrEmpty($url)) { |
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throw CouldNotCreateButton::urlNotProvided(); |
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} elseif (!filter_var($url, FILTER_VALIDATE_URL)) { |
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throw CouldNotCreateButton::invalidUrlProvided($url); |
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} |
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$this->payload['url'] = $url; |
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$this->isTypeWebUrl(); |
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return $this; |
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} |
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/** |
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* @param $phone |
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* |
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* @return $this |
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* @throws CouldNotCreateButton |
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*/ |
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public function phone($phone) |
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{ |
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if ($this->isNotSetOrEmpty($phone)) { |
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throw CouldNotCreateButton::phoneNumberNotProvided(); |
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} elseif (is_string($phone) && !starts_with($phone, '+')) { |
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throw CouldNotCreateButton::invalidPhoneNumberProvided($phone); |
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} |
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$this->payload['payload'] = $phone; |
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$this->isTypePhoneNumber(); |
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return $this; |
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} |
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/** |
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* @param $postback |
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* |
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* @return $this |
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* @throws CouldNotCreateButton |
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*/ |
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public function postback($postback) |
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{ |
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if ($this->isNotSetOrEmpty($postback)) { |
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throw CouldNotCreateButton::postbackNotProvided(); |
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} elseif (!is_array($postback)) { |
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throw CouldNotCreateButton::invalidPostbackProvided($postback); |
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} |
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$this->payload['payload'] = json_encode($postback); |
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$this->isTypePostback(); |
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return $this; |
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} |
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/** |
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* Set Button Type. |
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* |
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* @param $type Possible Values: "web_url", "postback" or "phone_number". Default: "web_url" |
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* |
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* @return $this |
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*/ |
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public function type($type) |
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{ |
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$this->payload['type'] = $type; |
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return $this; |
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} |
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/** |
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* Set button type as web_url. |
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* |
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* @return $this |
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*/ |
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public function isTypeWebUrl() |
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{ |
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$this->payload['type'] = ButtonType::WEB_URL; |
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return $this; |
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} |
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/** |
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* Set button type as postback. |
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* |
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* @return $this |
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*/ |
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public function isTypePostback() |
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{ |
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$this->payload['type'] = ButtonType::POSTBACK; |
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return $this; |
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} |
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/** |
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* Set button type as phone_number. |
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* |
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* @return $this |
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*/ |
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public function isTypePhoneNumber() |
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{ |
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$this->payload['type'] = ButtonType::PHONE_NUMBER; |
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return $this; |
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} |
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/** |
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* Determine Button Type. |
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* |
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* @param $type |
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* |
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* @return bool |
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*/ |
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protected function isType($type) |
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{ |
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return isset($this->payload['type']) && $type === $this->payload['type']; |
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} |
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/** |
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* Make payload by data and type. |
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* |
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* @param mixed $data |
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* |
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* @return $this |
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* @throws CouldNotCreateButton |
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*/ |
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protected function makePayload($data) |
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{ |
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if ($this->isNotSetOrEmpty($data)) { |
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return $this; |
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} |
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switch ($this->payload['type']) { |
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case ButtonType::WEB_URL: |
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$this->url($data); |
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break; |
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case ButtonType::PHONE_NUMBER: |
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$this->phone($data); |
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break; |
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case ButtonType::POSTBACK: |
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$this->postback($data); |
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break; |
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} |
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if (isset($this->payload['payload']) && mb_strlen($this->payload['payload']) > 1000) { |
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throw CouldNotCreateButton::payloadLimitExceeded($this->payload['payload']); |
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} |
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return $this; |
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} |
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/** |
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* Builds payload and returns an array. |
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* |
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* @return array |
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* @throws CouldNotCreateButton |
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*/ |
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public function toArray() |
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{ |
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$this->title($this->title); |
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$this->makePayload($this->data); |
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return $this->payload; |
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} |
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/** |
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* Convert the object into something JSON serializable. |
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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 $this->toArray(); |
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} |
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/** |
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* Determine if it's not set or is empty. |
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* |
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* @param $var |
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* |
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* @return bool |
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*/ |
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protected function isNotSetOrEmpty($var) |
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{ |
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return !isset($var) || empty($var); |
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} |
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} |
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