#!/usr/bin/php
<?php
chdir ( dirname ( __FILE__ ) );
require_once 'common.php';
assertCli ();

/**
 * @file
 * Compiles all of HTML Purifier's library files into one big file
 * named HTMLPurifier.standalone.php.
 * This is usually called during the
 * release process.
 */

/**
 * Global hash that tracks already loaded includes
 */
$GLOBALS ['loaded'] = array ();

/**
 * Custom FSTools for this script that overloads some behavior
 * @warning The overloading of copy() is not necessarily global for
 * this script.
 * Watch out!
 */
class MergeLibraryFSTools extends FSTools {
	public function copyable($entry) {
		// Skip hidden files
		if ($entry [0] == '.') {
			return false;
		}
		return true;
	}
	public function copy($source, $dest) {
		copy_and_remove_includes ( $source, $dest );
	}
}
$FS = new MergeLibraryFSTools ();

/**
 * Replaces the includes inside PHP source code with the corresponding
 * source.
 * 
 * @param string $text
 *        	PHP source code to replace includes from
 */
function replace_includes($text) {
	// also remove vim modelines
	return preg_replace_callback ( "/require(?:_once)? ['\"]([^'\"]+)['\"];/", 'replace_includes_callback', $text );
}

/**
 * Removes leading PHP tags from included files.
 * Assumes that there is
 * no trailing tag. Also removes vim modelines.
 * @note This is safe for files that have internal <?php
 * 
 * @param string $text
 *        	Text to have leading PHP tag from
 */
function remove_php_tags($text) {
	$text = preg_replace ( '#// vim:.+#', '', $text );
	return substr ( $text, 5 );
}

/**
 * Copies the contents of a directory to the standalone directory
 * 
 * @param string $dir
 *        	Directory to copy
 */
function make_dir_standalone($dir) {
	global $FS;
	return $FS->copyr ( $dir, 'standalone/' . $dir );
}

/**
 * Copies the contents of a file to the standalone directory
 * 
 * @param string $file
 *        	File to copy
 */
function make_file_standalone($file) {
	global $FS;
	$FS->mkdirr ( 'standalone/' . dirname ( $file ) );
	copy_and_remove_includes ( $file, 'standalone/' . $file );
	return true;
}

/**
 * Copies a file to another location recursively, if it is a PHP file
 * remove includes
 * 
 * @param string $file
 *        	Original file
 * @param string $sfile
 *        	New location of file
 */
function copy_and_remove_includes($file, $sfile) {
	$contents = file_get_contents ( $file );
	if (strrchr ( $file, '.' ) === '.php')
		$contents = replace_includes ( $contents );
	return file_put_contents ( $sfile, $contents );
}

/**
 *
 * @param $matches preg_replace_callback
 *        	matches array, where index 1
 *        	is the filename to include
 */
function replace_includes_callback($matches) {
	$file = $matches [1];
	$preserve = array (
			// PEAR (external)
			'XML/HTMLSax3.php' => 1 
	);
	if (isset ( $preserve [$file] )) {
		return $matches [0];
	}
	if (isset ( $GLOBALS ['loaded'] [$file] ))
		return '';
	$GLOBALS ['loaded'] [$file] = true;
	return replace_includes ( remove_php_tags ( file_get_contents ( $file ) ) );
}

echo 'Generating includes file... ';
shell_exec ( 'php generate-includes.php' );
echo "done!\n";

chdir ( dirname ( __FILE__ ) . '/../library/' );

echo 'Creating full file...';
$contents = replace_includes ( file_get_contents ( 'HTMLPurifier.includes.php' ) );
$contents = str_replace ( 
		// Note that bootstrap is now inside the standalone file
		"define('HTMLPURIFIER_PREFIX', realpath(dirname(__FILE__) . '/..'));", "define('HTMLPURIFIER_PREFIX', dirname(__FILE__) . '/standalone');
    set_include_path(HTMLPURIFIER_PREFIX . PATH_SEPARATOR . get_include_path());", $contents );
file_put_contents ( 'HTMLPurifier.standalone.php', $contents );
echo ' done!' . PHP_EOL;

echo 'Creating standalone directory...';
$FS->rmdirr ( 'standalone' ); // ensure a clean copy
                           
// data files
$FS->mkdirr ( 'standalone/HTMLPurifier/DefinitionCache/Serializer' );
make_file_standalone ( 'HTMLPurifier/EntityLookup/entities.ser' );
make_file_standalone ( 'HTMLPurifier/ConfigSchema/schema.ser' );

// non-standard inclusion setup
make_dir_standalone ( 'HTMLPurifier/ConfigSchema' );
make_dir_standalone ( 'HTMLPurifier/Language' );
make_dir_standalone ( 'HTMLPurifier/Filter' );
make_dir_standalone ( 'HTMLPurifier/Printer' );
make_file_standalone ( 'HTMLPurifier/Printer.php' );
make_file_standalone ( 'HTMLPurifier/Lexer/PH5P.php' );

echo ' done!' . PHP_EOL;

// vim: et sw=4 sts=4