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include/swiftmailer/lib/classes/Swift.php

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+<?php
+
+/*
+ * This file is part of SwiftMailer.
+ * (c) 2004-2009 Chris Corbyn
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/**
+ * General utility class in Swift Mailer, not to be instantiated.
+ *
+ * @author Chris Corbyn
+ */
+abstract class Swift
+{
+    const VERSION = '6.2.7';
+
+    public static $initialized = false;
+    public static $inits = [];
+
+    /**
+     * Registers an initializer callable that will be called the first time
+     * a SwiftMailer class is autoloaded.
+     *
+     * This enables you to tweak the default configuration in a lazy way.
+     *
+     * @param mixed $callable A valid PHP callable that will be called when autoloading the first Swift class
+     */
+    public static function init($callable)
+    {
+        self::$inits[] = $callable;
+    }
+
+    /**
+     * Internal autoloader for spl_autoload_register().
+     *
+     * @param string $class
+     */
+    public static function autoload($class)
+    {
+        // Don't interfere with other autoloaders
+        if (0 !== strpos($class, 'Swift_')) {
+            return;
+        }
+
+        $path = __DIR__.'/'.str_replace('_', '/', $class).'.php';
+
+        if (!file_exists($path)) {
+            return;
+        }
+
+        require $path;
+
+        if (self::$inits && !self::$initialized) {
+            self::$initialized = true;
+            foreach (self::$inits as $init) {
+                \call_user_func($init);
+            }
+        }
+    }
+
+    /**
+     * Configure autoloading using Swift Mailer.
+     *
+     * This is designed to play nicely with other autoloaders.
+     *
+     * @param mixed $callable A valid PHP callable that will be called when autoloading the first Swift class
+     */
+    public static function registerAutoload($callable = null)
+    {
+        if (null !== $callable) {
+            self::$inits[] = $callable;
+        }
+        spl_autoload_register(['Swift', 'autoload']);
+    }
+}