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wp-content/plugins/smart-slider-3/Nextend/Autoloader.php

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+<?php
+
+namespace Nextend;
+
+class Autoloader {
+
+    private static $instance = null;
+
+    private $aliases = array(
+        'N2Data'              => '\\Nextend\\Framework\\Data\\Data',
+        'N2SmartSliderBackup' => '\\Nextend\\SmartSlider3\\BackupSlider\\BackupData',
+        'N2SmartSliderImport' => '\\Nextend\\SmartSlider3\\BackupSlider\\ImportSlider',
+        'N2SmartSliderExport' => '\\Nextend\\SmartSlider3\\BackupSlider\\ExportSlider',
+    );
+
+    /**
+     * An associative array where the key is a namespace prefix and the value
+     * is an array of base directories for classes in that namespace.
+     *
+     * @var array
+     */
+    protected $prefixes = array();
+
+    public function __construct() {
+        $this->addNamespace('Nextend\\', dirname(__FILE__));
+
+
+        $this->register();
+
+        $currentPath = dirname(__FILE__) . '/';
+        foreach (scandir($currentPath) as $file) {
+            if ($file == '.' || $file == '..') continue;
+            $path = $currentPath . $file;
+            if (is_dir($path)) {
+
+                $className = '\\Nextend\\' . $file . '\\' . $file;
+
+                if (class_exists($className) && is_callable(array(
+                        $className,
+                        'getInstance'
+                    ))) {
+                    call_user_func_array(array(
+                        $className,
+                        'getInstance'
+                    ), array());
+                }
+            }
+        }
+
+        Nextend::getInstance();
+    }
+
+    public static function getInstance() {
+        if (self::$instance == null) {
+            self::$instance = new Autoloader();
+        }
+
+        return self::$instance;
+    }
+
+    /**
+     * Register loader with SPL autoloader stack.
+     *
+     * @return void
+     */
+    public function register() {
+        spl_autoload_register(array(
+            $this,
+            'loadClass'
+        ));
+    }
+
+    /**
+     * Adds a base directory for a namespace prefix.
+     *
+     * @param string $prefix   The namespace prefix.
+     * @param string $base_dir A base directory for class files in the
+     *                         namespace.
+     * @param bool   $prepend  If true, prepend the base directory to the stack
+     *                         instead of appending it; this causes it to be searched first rather
+     *                         than last.
+     *
+     * @return void
+     */
+    public function addNamespace($prefix, $base_dir, $prepend = false) {
+        // normalize namespace prefix
+        $prefix = trim($prefix, '\\') . '\\';
+
+        // normalize the base directory with a trailing separator
+        $base_dir = rtrim($base_dir, DIRECTORY_SEPARATOR) . '/';
+
+        // initialize the namespace prefix array
+        if (isset($this->prefixes[$prefix]) === false) {
+            $this->prefixes[$prefix] = array();
+        }
+
+        // retain the base directory for the namespace prefix
+        if ($prepend) {
+            array_unshift($this->prefixes[$prefix], $base_dir);
+        } else {
+            array_push($this->prefixes[$prefix], $base_dir);
+        }
+    }
+
+    /**
+     * Loads the class file for a given class name.
+     *
+     * @param string $class The fully-qualified class name.
+     *
+     * @return mixed The mapped file name on success, or boolean false on
+     * failure.
+     */
+    public function loadClass($class) {
+        // the current namespace prefix
+        $prefix = $class;
+
+        // work backwards through the namespace names of the fully-qualified
+        // class name to find a mapped file name
+        while (false !== $pos = strrpos($prefix, '\\')) {
+
+            // retain the trailing namespace separator in the prefix
+            $prefix = substr($class, 0, $pos + 1);
+
+            // the rest is the relative class name
+            $relative_class = substr($class, $pos + 1);
+
+            // try to load a mapped file for the prefix and relative class
+            $mapped_file = $this->loadMappedFile($prefix, $relative_class);
+            if ($mapped_file) {
+                return $mapped_file;
+            }
+
+            // remove the trailing namespace separator for the next iteration
+            // of strrpos()
+            $prefix = rtrim($prefix, '\\');
+        }
+
+        if (isset($this->aliases[$class]) && class_exists($this->aliases[$class])) {
+            /**
+             * Create class alias for old class names
+             */
+            class_alias($this->aliases[$class], $class);
+
+            return true;
+        }
+
+        // never found a mapped file
+        return false;
+    }
+
+    /**
+     * Load the mapped file for a namespace prefix and relative class.
+     *
+     * @param string $prefix         The namespace prefix.
+     * @param string $relative_class The relative class name.
+     *
+     * @return mixed Boolean false if no mapped file can be loaded, or the
+     * name of the mapped file that was loaded.
+     */
+    protected function loadMappedFile($prefix, $relative_class) {
+        // are there any base directories for this namespace prefix?
+        if (isset($this->prefixes[$prefix]) === false) {
+            return false;
+        }
+
+        // look through base directories for this namespace prefix
+        foreach ($this->prefixes[$prefix] as $base_dir) {
+
+            // replace the namespace prefix with the base directory,
+            // replace namespace separators with directory separators
+            // in the relative class name, append with .php
+            $file = $base_dir . str_replace('\\', '/', $relative_class) . '.php';
+
+            // if the mapped file exists, require it
+            if ($this->requireFile($file)) {
+                // yes, we're done
+                return $file;
+            }
+        }
+
+        // never found it
+        return false;
+    }
+
+    /**
+     * If a file exists, require it from the file system.
+     *
+     * @param string $file The file to require.
+     *
+     * @return bool True if the file exists, false if not.
+     */
+    protected function requireFile($file) {
+        if (file_exists($file)) {
+            require $file;
+
+            return true;
+        }
+
+        return false;
+    }
+}
+
+Autoloader::getInstance();