<?php
/**
 * Generates array of classes for autoload
 * 
 * @copyright NetMonsters <team@netmonsters.ru>
 * @link http://netmonsters.ru
 * @package Majestic
 * @subpackage util
 * @since 2010-02-24
 * @version SVN: $Id$
 * @filesource $URL$
 */

class AutoloadBuilder
{
    protected $autoload;
    protected $dirs;
    protected $handler;
    protected $regex = '/(class|interface) ([a-zA-Z_\x7f-\xff][a-zA-Z0-9_\x7f-\xff]*)/';
    
    public function __construct($autoload, $dirs = array())
    {
        $this->autoload = $autoload;
        $this->dirs     = $dirs;
    }
    
    public function build()
    {
        $this->openAutoload();
        echo "parsing started...\n";
        // for dublicates check
        $classes = array();
        foreach ($this->dirs as $dir) {
            $iterator = new RecursiveIteratorIterator(
                new RecursiveDirectoryIterator($dir),
                RecursiveIteratorIterator::LEAVES_ONLY
            );
            
            foreach ($iterator as $file) {
                // skip non php files
                $e = explode('.', $file->getFileName());
                if ((end($e) !== 'php') || strstr((string)$file, 'test')) {
                    continue;
                }
                
                $content = file_get_contents($file->getRealPath());
                $matches = array();
                
                $relative_path = substr($file->getRealPath(), strlen(PATH));
                
                if (preg_match_all($this->regex, $content, $matches, PREG_SET_ORDER)) {
                    foreach ($matches as $match) {
                        echo "found {$match[0]}...";
                        if (array_key_exists($match[2], $classes)) {
                            echo " FAULT\n{$match[0]} also found in ".
                            $file->getRealPath(). ", skipped.\n";
                            continue;
                        }
                        echo " OK\n";
                        $string = "'{$match[2]}'=>'" . $relative_path . "',\n";
                        $this->write($string);
                        $classes[$match[2]] = $file->getRealPath();
                    }
                }
            }
        }
        echo "done.\n";
        $this->closeAutoload();
    }
    
    protected function openAutoload()
    {
        $this->write("<?php\n// This file is autogenerated by \n// " . __FILE__ . " script.\nreturn array(\n");
    }
    
    protected function closeAutoload()
    {
        if ($this->write(");\n")) {
            fclose($this->handler);
        }
    }
    
    protected function write($string)
    {
        if (! $this->handler) {
            if (! $this->handler = fopen($this->autoload, 'w')) {
                echo "{$this->autoload} is not writable\n";
                die;
            }
        }
        return (bool) fwrite($this->handler, $string);
    }
}