Tabs Component

application/core/CI3_Events.php

@@ -0,0 +1,51 @@
+<?php
+
+if (! defined('BASEPATH')) exit('No direct script access allowed');
+
+class CI3_Events
+{
+	const PRIORITY_LOW = 200;
+	const PRIORITY_NORMAL = 100;
+	const PRIORITY_HIGH = 10;
+
+	private static $events = [];
+	private static $eventsSorted = [];
+
+	public static function on($event, $function, $priority = self::PRIORITY_NORMAL)
+	{
+		if (!isset(self::$events[$event]))
+			self::$events[$event] = [];
+
+		self::$events[$event][] = [$priority, $function];
+
+		if (!isset(self::$eventsSorted[$event]))
+			self::$eventsSorted[$event] = true;
+		else
+			self::$eventsSorted[$event] = false;
+	}
+
+	public static function trigger($event, &...$args)
+	{
+		if (!isset(self::$events[$event]))
+			return;
+
+		if (!self::$eventsSorted[$event]) {
+			usort(self::$events[$event], function ($a, $b) {
+				return $a[0] - $b[0];
+			});
+			self::$eventsSorted[$event] = true;
+		}
+		
+		foreach (self::$events[$event] as $conf) {
+			call_user_func_array($conf[1], $args);
+		}
+	}
+}
+
+/**
+ * NOTE(chris): Autoload Events config
+ */
+require_once(APPPATH.'config/Events.php');
+foreach (scandir(APPPATH.'config/extensions') as $dir)
+	if ($dir[0] != '.' && file_exists(APPPATH.'config/extensions/'.$dir.'/Events.php'))
+		require_once APPPATH.'config/extensions/'.$dir.'/Events.php';