<?php

/**
 * Recursively strips all comments and whitespace out of .php files
 * in a specified source directory. The original files are not
 * modified. The stripped files are copied to a specified target dir.
 * 
 * Command line syntax: php Stripper.php [sourceDir] [targetDir]
 * 
 * Both parameters are optional. [sourceDir] defaults to the
 * directory that contains Stripper.php. [targetDir] defaults to
 * a copy of the directory that contains Stripper.php with '-stripped'
 * appended to the directory name.
 * 
 * You can also run it from your browser by putting it in your library
 * folder and going to http://mysite.com/path/to/library/Stripper.php
 *
 * @author Michael Sheakoski
 */

header('Content-Type: text/plain');

if (array_key_exists(1, $_SERVER['argv']) && !empty($_SERVER['argv'][1])) {
    $sourceDir = $_SERVER['argv'][1];
} elseif (array_key_exists(0, $_SERVER['argv'])) {
    $sourceDir = dirname($_SERVER['argv'][0]);
} else {
    $sourceDir = dirname($_SERVER['SCRIPT_FILENAME']);
}

if (array_key_exists(2, $_SERVER['argv']) && !empty($_SERVER['argv'][2])) {
    $targetDir = $_SERVER['argv'][2];
} else {
    $targetDir = null;
}

$stripper = new PhpSourceCodeStripper();
$stripper->setSourceDir($sourceDir);
$stripper->setTargetDir($targetDir);
$stripper->strip();


class PhpSourceCodeStripper
{
    public $sourceDir;
    public $targetDir;
    
    public function setSourceDir($dir)
    {
        if (!is_dir($dir)) {
            throw new Exception('Directory [' . $dir . '] does not exist');
        }
        
        if (basename($dir) === '.' || basename($dir) === '..') {
            $dir = realpath($dir);
        }
        
        $this->sourceDir = rtrim($dir, DIRECTORY_SEPARATOR);
    }
    
    public function getSourceDir()
    {
        return $this->sourceDir;
    }
    
    public function setTargetDir($dir = null)
    {
        if (is_null($dir)) {
            $dir = $this->getSourceDir();
            
            if (is_null($dir)) {
                throw new Exception('You must first call setSourceDir() before calling setTargetDir()');
            }
            
            $dir .= '-stripped';
        }
        
        $dir = rtrim($dir, DIRECTORY_SEPARATOR);
        
        if (!is_dir($dir)) {
            if (!mkdir($dir)) {
                throw new Exception('Cannot create directory [' . $dir . ']. Please create it manually and try again');
            }
        }
        
        $this->targetDir = $dir;
    }
    
    public function getTargetDir()
    {
        return $this->targetDir;
    }
    
    public function strip($dir = null)
    {
        if (is_null($dir)) {
            $dir = $this->getSourceDir();
            
            echo 'Source dir: ', $dir, "\n";
            echo 'Target dir: ', $this->getTargetDir(), "\n\n";
        }
        
    	if (is_dir($dir)) {
    		if ($handle = opendir($dir)) {
    			while (($file = readdir($handle)) !== false) {
    				// If $file is a directory and not . or ..
    				if (is_dir($dir . DIRECTORY_SEPARATOR . $file) && $file !== '.' && $file !== '..') {
    					if ($file !== '.svn') {
        				    // Dive deeper into the current dir
        					$this->strip($dir . DIRECTORY_SEPARATOR . $file);
    					}
    				}
    				elseif (is_file($dir . DIRECTORY_SEPARATOR . $file)) {
                        if (substr($file, strrpos($file, '.')) === '.php') {
    				        $targetDir = str_replace($this->getSourceDir(), $this->getTargetDir(), $dir);
                            if (!is_dir($targetDir) && !mkdir($targetDir, 0777, true)) {
                                throw new Exception('Cannot create directory [' . $targetDir . ']. Please make sure the parent dir [' . $this->getTargetDir() . '] has write permissions');
                            }
                            $strippedData = php_strip_whitespace($dir . DIRECTORY_SEPARATOR . $file);
                            if ($strippedData !== '') {
                                if (strpos($strippedData, '<<<') === false) {
            				        echo 'Stripping: ', $dir . DIRECTORY_SEPARATOR . $file;
                                    $this->writeFile($targetDir . DIRECTORY_SEPARATOR . $file, $strippedData);
                                    $sourceFilesize = filesize($dir . DIRECTORY_SEPARATOR . $file);
                                    $targetFilesize = strlen($strippedData);
                                    echo ' ',
                                        $sourceFilesize, ' bytes -> ', $targetFilesize, ' bytes',
                                        ' = ', 100 - round(100 / $sourceFilesize * $targetFilesize, 0), "% smaller\n";
                                } else {
            				        echo 'Heredoc detected! Copying: ', $dir . DIRECTORY_SEPARATOR . $file, "\n";
            				        copy($dir . DIRECTORY_SEPARATOR . $file, $targetDir . DIRECTORY_SEPARATOR . $file);
                                }
                            }
                        }
    				}
    			}
    			
    			closedir($handle);
    		}
    	}
    }
    
    public function writeFile($filename, $data)
    {
        if (!$handle = fopen($filename, 'w')) {
            echo "Cannot open file ($filename)";
            exit;
        }
        
        if (fwrite($handle, $data) === false) {
            echo "Cannot write to file ($filename)";
            exit;
        }
        
        fclose($handle);
    }
}