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<?php |
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namespace MBSocial; |
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defined('ABSPATH') or die('No direct access permitted'); |
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|
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/// ssst. Plugin communicating |
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class whistle |
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{ |
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|
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protected $listeners = array(); |
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protected $told = array(); |
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protected $asked = array(); |
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protected $offers = array(); |
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protected $offer_order = array(); |
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|
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protected $log_active = false; |
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//protected $timer_active = false; |
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//protected $time_start = 0; |
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|
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public static function getInstance() |
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{ |
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return new whistle(); |
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|
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} |
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|
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public function __construct() |
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{ |
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|
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} |
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|
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public function tell($msg, $args = array(), $priority='') |
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{ |
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|
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|
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$this->told[$msg][] = $args; |
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$this->checkListeners($msg, "tell"); |
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//$this->timer($msg, array('tell') ); |
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|
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} |
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|
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// if there is only one good answer |
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public function ask($msg, $respond = null) |
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{ |
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$return = null; |
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//$this->timer($msg, array('ask') ); |
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if (isset($this->told[$msg])) |
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{ |
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$response = end($this->told[$msg]); |
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|
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if (is_null($respond)) |
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$return = $response; |
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elseif (is_callable($respond)) |
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{ |
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$return = call_user_func($respond, $response); |
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} |
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} |
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elseif (! is_null($respond)) // if not now, and there is a respond callback, tell them later. |
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{ |
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$this->listen($msg, $respond, 'tell'); |
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} |
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|
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$checked = $this->checkListeners($msg, "ask"); |
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if (! is_null($checked)) // if the listener has a better answer. |
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$return = $checked; |
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|
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return $return; |
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} |
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|
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// direction: if to listen to somebody telling something, or asking something. |
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public function listen($msg, $callback, $direction) |
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{ |
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$this->listeners[$direction][$msg][] = $callback; // wtf! |
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} |
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|
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// Callback structure for more complicated data. |
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public function offer($msg, $callback, $args = array(), $priority = 10) |
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{ |
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|
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if ( isset($this->offers[$msg]) ) |
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$count = count($this->offers[$msg]); |
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else |
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$count = 0; |
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|
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$this->offer_order[$msg][ $count ] = $priority; |
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$this->offers[$msg][] = array('callback' => $callback, |
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'args' => $args); |
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|
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$this->checkListeners($msg, 'ask'); |
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} |
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|
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// Check if there are any offers |
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public function hasOffer($msg) |
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{ |
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if (isset($this->offers[$msg]) && $this->offers[$msg] > 0) |
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{ |
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return true; |
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} |
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else |
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return false; |
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} |
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|
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public function collect($msg, $collect_args = array() ) |
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{ |
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$results = array(); |
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$this->checkListeners($msg, 'tell'); |
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|
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if (isset($this->offers[$msg])) |
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{ |
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$offers = $this->offers[$msg]; |
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|
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$offer_order = $this->offer_order[$msg]; |
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|
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asort($offer_order, SORT_NUMERIC); // sort by priority |
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|
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if (count ($offer_order) == count($offers) ) |
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{ |
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$new_offers = array(); |
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foreach($offer_order as $index => $prio) |
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{ |
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$new_offers[] = $offers[$index]; |
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} |
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$offers = $new_offers; |
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} |
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else |
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{ |
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//MI()->errors()->add( new \Exception('Whistle collect - Offer order and Offers are of different size') ); |
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} |
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|
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foreach($offers as $offer) |
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{ |
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$call = $offer['callback']; |
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$args = $offer['args']; // perhaps this is useless, of this should be returned if no callback is given? |
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|
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if(is_callable($call) ) |
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$results[] = call_user_func($call, $args, $collect_args); |
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else |
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{ |
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//MI()->errors()->add( new \Exception('Offer ' . $msg . ' has an invalid callback') ); |
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} |
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|
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} |
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} |
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|
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$this->checkListeners($msg . '_done', 'tell'); // our option to plug after. |
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return $results; |
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} |
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|
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protected function checkListeners($msg, $direction) |
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{ |
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if (isset($this->listeners[$direction][$msg])) |
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{ |
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$response = null; |
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|
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foreach($this->listeners[$direction][$msg] as $listener) |
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{ |
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if (isset($this->told[$msg])) |
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{ |
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$response = end($this->told[$msg]); |
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} |
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|
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|
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if(is_callable($listener) ) |
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{ |
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$response = call_user_func( $listener, $response); |
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} |
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else |
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{ |
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//MI()->errors()->add( new \Exception('Listener is not a callback') ); |
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} |
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} |
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return $response; // this will return only the last response, possibly also not great. |
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} |
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} |
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|
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/** Send message to log file |
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* |
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* Function will tell log function to record statement |
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* @param @msg String The message to log |
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* @param @args Array Extra variables to show in log file |
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*/ |
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|
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public function log($msg, $args) |
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{ |
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$logger = $this->ask('system/logger'); |
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try { |
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$logger->debug($msg . ":" . var_export($args, true) ); |
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} |
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catch (Exception $e) |
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{ |
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$logger->error('Logger ran into trouble: ', $e); |
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} |
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} |
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|
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} // class |
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|
