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<?php namespace Viber; use Closure; use Viber\Bot\Manager; use Viber\Api\Event; use Viber\Api\Signature; use Viber\Api\Event\Factory; use Viber\Api\Entity; /** * Build bot with viber client * * @author Novikov Bogdan <hcbogdan@gmail.com> / class Bot { /* * Api client * * @var \Viber\Client / protected $client; /* * Event managers collection * * @var array / protected $managers = []; /* * Init client * * Required options (one of two): * token string * client \Viber\Client * * @throws \RuntimeException * @param array $options / public function __construct(array $options) { if (isset($options['token'])) { $this->client = new Client($options); } elseif (isset($options['client']) && $options['client'] instanceof Client) { $this->client = $options['client']; } else { throw new \RuntimeException('Specify "client" or "token" parameter'); } } /* * Get current bot client * * @return \|Viber\Client / public function getClient() { return $this->client; } /* * Register event handler callback * * @param \Closure $checker checker function * @param \Closure $handler handler function * * @return \Viber\Bot / public function on(\Closure $checker, \Closure $handler) { $this->managers[] = new Manager($checker, $handler); return $this; } /* * Register text message handler by PCRE * * @param string $regexp valid regular expression * @param Closure $handler event handler * @return \Viber\Bot / public function onText($regexp, \Closure $handler) { $this->managers[] = new Manager(function (Event $event) use ($regexp) { return ( $event instanceof \Viber\Api\Event\Message && $event->getMessage() instanceof \Viber\Api\Message\Text && preg_match($regexp, $event->getMessage()->getText()) ); }, $handler); return $this; } /* * Register subscrive event handler * * @param Closure $handler valid function * @return \Viber\Bot / public function onSubscribe(\Closure $handler) { $this->managers[] = new Manager(function (Event $event) { return ($event instanceof \Viber\Api\Event\Subscribed); }, $handler); return $this; } /* * Register subscrive event handler * * @param Closure $handler valid function * @return \Viber\Bot / public function onUnsubscribe(\Closure $handler) { $this->managers[] = new Manager(function (Event $event) { return ($event instanceof \Viber\Api\Event\Unsubscribed); }, $handler); return $this; } /* * Register conversation event handler * * @param Closure $handler valid function * @return \Viber\Bot / public function onConversation(\Closure $handler) { $this->managers[] = new Manager(function (Event $event) { return ($event instanceof \Viber\Api\Event\Conversation); }, $handler); return $this; } /* * Register picture message handler * * @param Closure $handler event handler * @return \Viber\Bot / public function onPicture(\Closure $handler) { $this->managers[] = new Manager(function (Event $event) { return ( $event instanceof \Viber\Api\Event\Message && $event->getMessage() instanceof \Viber\Api\Message\Picture ); }, $handler); return $this; } /* * Get signature header * * @throws \RuntimeException * @return string / public function getSignHeaderValue() { $signature = ''; if (isset($_SERVER['HTTP_X_VIBER_CONTENT_SIGNATURE'])) { $signature = $_SERVER['HTTP_X_VIBER_CONTENT_SIGNATURE']; } elseif (isset($_GET['sig'])) { $signature = $_GET['sig']; } if (empty($signature)) { throw new \RuntimeException('Signature header not found', 1); } return $signature; } /* * Get bot input stream * * @return string / public function getInputBody() { return file_get_contents('php://input'); } /* * Response with entity * * @param Entity $entity * @return void / public function outputEntity(Entity $entity) { header('Content-Type: application/json'); echo json_encode($entity->toApiArray()); } /* * Start bot process * * @throws \RuntimeException * @param \Viber\Api\Event $event start bot with some event * @return \Viber\Bot */ public function run($event = null) { if (null === $event) { // check body $eventBody = $this->getInputBody(); if (!Signature::isValid( $this->getSignHeaderValue(), $eventBody, $this->getClient()->getToken() )) { throw new \RuntimeException('Invalid signature header', 2); } // check json $eventBody = json_decode($eventBody, true); if (json_last_error() \|\| empty($eventBody) \|\| !is_array($eventBody)) { throw new \RuntimeException('Invalid json request', 3); } // make event from json $event = Factory::makeFromApi($eventBody); } elseif (!$event instanceof Event) { throw new \RuntimeException('Event must be instance of \Viber\Api\Event', 4); } // main bot loop foreach ($this->managers as $manager) { if ($manager->isMatch($event)) { $returnValue = $manager->runHandler($event); if ($returnValue && $returnValue instanceof Entity) { // reply with entity $this->outputEntity($returnValue); } break; } } return $this; } }

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