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Internal/package-event-handler/Event.php

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+<?php namespace ZN\EventHandler;
+/**
+ * ZN PHP Web Framework
+ * 
+ * "Simplicity is the ultimate sophistication." ~ Da Vinci
+ * 
+ * @package ZN
+ * @license MIT [http://opensource.org/licenses/MIT]
+ * @author  Ozan UYKUN [ozan@znframework.com]
+ */
+
+use ZN\EventHandler\Exception\InvalidCallbackMethodException;
+
+class Event implements EventInterface
+{
+    /**
+     * Event Callable
+     */
+    use EventCallable;
+
+    /**
+     * Run event by event name
+     * 
+     * @param string $event
+     * @param array  $parameters
+     * 
+     * @return bool
+     */
+    public static function run(string $event, array $parameters = []) : bool
+    {
+        $events = self::get($event);
+        
+        $return = NULL;
+
+        foreach( $events as $e )
+        {
+            $return = $e(...$parameters);
+        }
+
+        if( $return === false )
+        {
+            return false;
+        }
+
+        return true;
+    }
+
+    /**
+     * Insert a listener.
+     * 
+     * @param callable|int    $callback
+     * @param int|null        $priority
+     */
+    public static function callback($callback = NULL, $priority = NULL) : Event
+    {
+        if( ! is_callable($callback) )
+        {
+            throw new InvalidCallbackMethodException;
+        }
+
+        if( $priority )
+        {
+            Properties::$listener[$priority] = $callback;
+        }
+        else
+        {
+            Properties::$listener[] = $callback;
+        }
+
+        return new self;
+    }
+
+    /**
+     * Insert a listener.
+     * 
+     * @param string $event
+     */
+    public static function create($event = NULL)
+    { 
+        $listener = Properties::$listener;
+
+        Properties::$listener = [];
+
+        Properties::$listeners[$event] = $listener;
+
+        return new self;
+    }
+
+    /**
+     * Select a listener.
+     * 
+     * @param string $event
+     * @param int    $priority = NULL
+     * 
+     * @return array|callback
+     */
+    public static function get(string $event, ?int $priority = NULL)
+    {
+        if ( ! isset(Properties::$listeners[$event]))
+		{
+			return [];
+        }
+
+        $listeners = Properties::$listeners[$event];
+        
+        ksort($listeners);
+
+        if( $priority )
+        {
+            return $listeners[$priority] ?? [];
+        }
+
+        return $listeners;
+    }
+
+    /**
+     * Delete a listener.
+     * 
+     * @param string $event
+     * @param int    $priority = NULL
+     * 
+     * @return bool
+     */
+    public static function remove(string $event, ?int $priority = NULL) : bool
+    {
+        if( isset(Properties::$listeners[$event][$priority]) )
+        {
+            unset(Properties::$listeners[$event][$priority]);
+
+            return true;
+        }
+
+        if( $priority === NULL && isset(Properties::$listeners[$event]) )
+        {
+            unset(Properties::$listeners[$event]);
+
+            return true;
+        }
+
+        return false; // @codeCoverageIgnore
+    }
+}