minify/

<?php
/**
 * shimansky.biz, mobile-english.ru
 *
 * Static web site core scripts
 * @package shimansky.biz
 * @author Serguei Shimansky <englishextra@yandex.ru>
 * @copyright Serguei Shimansky 11:28 23.07.2011
 * @access public
 * @version 0.1
 * @link https://bitbucket.org/englishextra/shimansky.biz
 * @link https://bitbucket.org/englishextra/mobile-english.ru
 * @link https://github.com/englishextra/shimansky.biz.git
 * @link https://github.com/englishextra/mobile-english.ru.git
 */

$relpa = ($relpa0 = preg_replace("/[\/]+/", "/", $_SERVER['DOCUMENT_ROOT'] . '/')) ? $relpa0 : '';

ob_start();

/**
 * put these lines in .htaccess send unpacked gzip to browser
 * php_flag zlib.output_compression On
 * php_value zlib.output_compression_level 5
 */
function lib_local_print_gzipped_scripts($type, $expires_offset, $p) {

    $contenttype = '';
    if ($type == 'js') {$contenttype = 'application/x-javascript';}
    elseif ($type == 'css') {$contenttype = 'text/css';}

    header("Cache-Control: public, max-age=" . $expires_offset);
    header("Expires: " . gmdate( "D, d M Y H:i:s", time() + $expires_offset ) . " GMT");
    header("Content-Type: " . $contenttype . "; charset=UTF-8");

    if ( !ini_get('zlib.output_compression') && 'ob_gzhandler' != ini_get('output_handler') && isset($_SERVER['HTTP_ACCEPT_ENCODING']) ) {
        header('Vary: Accept-Encoding');
        if ( false !== strpos( strtolower($_SERVER['HTTP_ACCEPT_ENCODING']), 'deflate') && function_exists('gzdeflate')) {
            header('Content-Encoding: deflate');
            $p = gzdeflate( $p, 3 );
        } elseif ( false !== strpos( strtolower($_SERVER['HTTP_ACCEPT_ENCODING']), 'gzip') && function_exists('gzencode')) {
            header('Content-Encoding: gzip');
            $p = gzencode( $p, 3 );
        }
    }
    echo $p;
}

function lib_local_write_file ($data, $w, $type) {
    if (!$fo = fopen($data, $type)) {
        die('Cannot open file: ' . $data);
    }
    if (!is_writable($data)) {
        die('Cannot write file: ' . $data);
    }
    flock($fo, LOCK_EX);
    fputs($fo, $w);
    fflush($fo);
    flock($fo, LOCK_UN);
    fclose($fo);
}

function lib_local_fix_filename ($s) {
    $s = str_replace(array(' ','\\','\/','_','-','.',',','!','(',')','[',']'), '', strtolower($s));
    return $s;
}

function lib_local_packCSS($s) {

    //$s = preg_replace('!/\*[^*]*\*+([^/][^*]*\*+)*/!', '', $s);

    $s = str_replace(array("\n", "\r", "\t", "\v", "\0", "\x0B"), '', preg_replace("/[^\x20-\xFF]/", "", trim(@strval($s))));

    $a = array("/[\ ]+/s" => " ",
                "/\; \}/s" => "}",
                "/\;\}/s" => "}",
                "/\}\ /s" => "}",
                "/\: /s" => ":",
                "/\ \{/s" => "{",
                "/\{\ /s" => "{",
                "/\; /s" => ";",
                "/\,\ /s" => ",",
                "/\/\*(.*?)\*\//s" => "");

    foreach($a as $k => $v) {
        $s = preg_replace($k, $v, $s);
    }

    return $s;
}

error_reporting(0);

/**
 * get query string
 */
$type = isset($_GET['type']) ? $_GET['type'] : '';
$load = isset($_GET['load']) ? $_GET['load'] : '';
$static = isset($_GET['static']) ? $_GET['static'] : '';
$method = isset($_GET['method']) ? $_GET['method'] : 'minify';

/**
 * die if not enough parameters
 */
if (!$type && (!$load || !$static)) {die('/*empty query string*/');}

$hash_filepath = $relpa . 'temp/cache/' . $type . '_' . md5($load);

/**
 * is mobile device? print empty js and handheld css
 */
require_once $relpa .'lib/lib_mobile_device_detect.inc';

$is_handheld = (mobile_device_detect()) ? 1 : '';

/**
 * is search engine bot? print empty js and handheld css
 */
require_once $relpa .'lib/lib_browser.inc';

if (!isset($browser) || empty($browser)) {$browser = new Browser();}

$ua = ($ua0 = $browser->getBrowser()) ? $ua0 : '';

//$is_handheld = ($browser->isMobile()) ? 1 : ''; //not reliable with browser.php library

/**
 * is search bot?
 */
$is_robot = ($browser->isRobot()) ? 1 : '';

/**
 * if mobile device or search engine bot, print empty js and handheld css
 */
if (!empty($is_handheld) || !empty($is_robot) || !$ua) {

    $handheld_css_filepath = $relpa . 'css/handheld.css';

    $handheld_css = (file_exists($handheld_css_filepath)) ? file_get_contents($handheld_css_filepath) : '';

    $p = '';

    switch ($type) {

        case 'js':
            $p = '';
            break;

        case 'css':
            $p = lib_local_packCSS($handheld_css);
            break;
    }

    lib_local_write_file($hash_filepath, $p, "w+");
    lib_local_print_gzipped_scripts($type, 31536000, $p);
    exit;
}

/**
 * read from cache when we are sure this is not mobile
 */
if (!empty($ua)) {$hash_filepath = $relpa . 'temp/cache/'
    . lib_local_fix_filename ($ua)
    . '_' . $type . '_' . md5($load);}

$hash_filepath_exits = ( file_exists($hash_filepath) ) ? 1 : '';

if ($hash_filepath_exits) {

    lib_local_print_gzipped_scripts($type, 31536000, '/* from cache file ' . str_replace($relpa . 'temp/cache/', '', $hash_filepath) . ' */' . "\n\n" . file_get_contents($hash_filepath));
    exit;
}

/**
 * initialise output sting
 */
$p = '';

/**
 * print static content first, in .htacces there mast be a rewrite rule:
 * RewriteEngine On
 * RewriteBase /
 * RewriteRule ^(css|js)/([0-9a-z]+)\.(css|js)?$ $1/?static=$1/$2.$3&type=$3 [L]
 */
if (!empty($static) && !empty($type)) {

    $p = file_get_contents($relpa . $static);

/**
 * print packed or minified
 */
} elseif (!empty($load) && !empty($type)) {

    require_once $relpa . 'lib/lib_packscripts.inc';

    $load = explode(',', preg_replace( '/[^a-z0-9\_\,\.\/]+/i', '', $load));

    // obfuscate content
    if ($type == 'css') {

        switch ($method) {

            case 'pack':
                foreach( $load as $handle ) {
                    $p .= "\n" . '/*'. $type .'/' . $handle . '.' . $type .'*/'. "\n\n" . Minify_CSS_Compressor::process(file_get_contents($relpa . $type .'/' . $handle . '.' . $type), null) . "\n";
                }
                break;

            case 'minify':
                foreach( $load as $handle ) {
                    $p .= "\n" . '/*'. $type .'/' . $handle . '.' . $type .'*/'. "\n\n" . CssMin::minify(file_get_contents($relpa . $type .'/' . $handle . '.' . $type)) . "\n";
                }
                break;
        }

    } elseif ($type == 'js') {

        switch ($method) {

            case 'pack':
                foreach( $load as $handle ) {
                    $packer = new JavaScriptPacker(file_get_contents($relpa . $type .'/' . $handle . '.' . $type) . "\n", 'Normal', true, false);
                    $p .= "\n" . '/*'. $type .'/' . $handle . '.' . $type .'*/'. "\n" . $packer->pack();
                }
                break;

            case 'minify':
                foreach( $load as $handle ) {
                    $p .= "\n" . '/*'. $type .'/' . $handle . '.' . $type .'*/'. "\n" . JSMin::minify(file_get_contents($relpa . $type .'/' . $handle . '.' . $type)) . "\n";
                }
                break;
        }
    }
}

/**
 * cache and print output
 */
if (!empty($p)) {

    if (!$hash_filepath_exits
        && !preg_match("/localhost/i", $_SERVER['HTTP_HOST'])
    ) {
        lib_local_write_file($hash_filepath, $p, "w+");
    }

    lib_local_print_gzipped_scripts($type, 31536000, $p);
}

ob_end_flush();