<?php
# -- BEGIN LICENSE BLOCK ----------------------------------
#
# This file is part of pacKman, a plugin for Dotclear 2.
# 
# Copyright (c) 2009-2013 Jean-Christian Denis and contributors
# contact@jcdenis.fr http://jcd.lv
# 
# Licensed under the GPL version 2.0 license.
# A copy of this license is available in LICENSE file or at
# http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
#
# -- END LICENSE BLOCK ------------------------------------

if (!defined('DC_CONTEXT_ADMIN')) {
    return null;
}

class dcPackman
{
    public static $exclude = [
        '.',
        '..',
        '__MACOSX',
        '.svn',
        '.hg*',
        '.git*',
        'CVS',
        '.DS_Store',
        'Thumbs.db'
    ];

    public static function quote_exclude($exclude)
    {
        foreach($exclude AS $k => $v) {
            $exclude[$k] = '#(^|/)(' . str_replace(
                ['.', '*'],
                ['\.', '.*?'],
                trim($v)
            ) . ')(/|$)#';
        }

        return $exclude;
    }

    public static function getPackages($core, $root)
    {
        $res = array();

        $cache = self::getCache() . '/';
        if (!is_dir($root) || !is_readable($root)) {
            return $res;
        }

        $files = files::scanDir($root);
        $zip_files = array();
        foreach($files AS $file) {
            if (!preg_match('#(^|/)(.*?)\.zip(/|$)#', $file)) {
                continue;
            }
            $zip_files[] = $file;
        }

        if (empty($zip_files)) {
            return $res;
        }

        $modules = new dcModules($core);
        $themes = new dcThemes($core);

        $i = 0;
        foreach($zip_files AS $zip_file) {
            $zip = new fileUnzip($root . '/' . $zip_file);

            $zip_root_dir = $zip->getRootDir();

            if ($zip_root_dir != false) {
                $define = $zip_root_dir . '/_define.php';
                $has_define = $zip->hasFile($define);
            } else {
                $define = '_define.php';
                $has_define = $zip->hasFile($define);
            }

            if (!$has_define) {
                continue;
            }

            $zip->unzip($define, $cache . '/_define.php');

            $modules->requireDefine($cache, $zip_root_dir);
            if ($modules->moduleExists($zip_root_dir)) {
                $res[$i] = $modules->getModules($zip_root_dir);
            } else {
                $themes->requireDefine($cache, $zip_root_dir);
                $res[$i] = $themes->getModules($zip_root_dir);
            }
            $res[$i]['id'] = $zip_root_dir;
            $res[$i]['root'] = $root . '/' . $zip_file;

            unlink($cache . '_define.php');
            $i++;
        }

        return $res;
    }

    public static function pack($info, $root, $files, $overwrite = false, $exclude = [], $nocomment = false)
    {
        if (!($info = self::getInfo($info))
         || !($root = self::getRoot($root))) {
            return false;
        }

        $exclude = self::getExclude($exclude);

        foreach($files as $file) {
            if (!($file = self::getFile($file, $info))
             || !($dest = self::getOverwrite($overwrite, $root, $file))) {
                continue;
            }

            @set_time_limit(300);
            $fp = fopen($dest, 'wb');

            $zip = $nocomment ? 
                new packmanFileZip($fp) : new fileZip($fp);

            foreach($exclude AS $e) {
                $zip->addExclusion($e);
            }
            $zip->addDirectory(
                path::real($info['root']),
                $info['id'],
                true
            );

            $zip->write();
            $zip->close();
            unset($zip);
        }

        return true;
    }

    private static function getRoot($root)
    {
        $root = path::real($root);
        if (!is_dir($root) || !is_writable($root)) {
            throw new Exception('Directory is not writable');
        }

        return $root;
    }

    private static function getInfo($info)
    {
        if (!isset($info['root']) 
         || !isset($info['id']) 
         || !is_dir($info['root'])) {
            throw new Exception('Failed to get module info');
        }

        return $info;
    }

    private static function getExclude($exclude)
    {
        $exclude = array_merge(self::$exclude, $exclude);

        return self::quote_exclude($exclude);
    }

    private static function getFile($file, $info)
    {
        if (empty($file) || empty($info)) {
            return null;
        }

        $file = str_replace(
            [
                '%type%',
                '%id%',
                '%version%',
                '%author%',
                '%time%'
            ],
            [
                $info['type'],
                $info['id'],
                $info['version'],
                $info['author'],
                time()
            ],
            $file
        );
        $parts = explode('/', $file);
        foreach($parts as $i => $part) {
            $parts[$i] = files::tidyFileName($part);
        }
        return implode('/', $parts) . '.zip';
    }

    private static function getOverwrite($overwrite, $root, $file)
    {
        $path = $root . '/' . $file;
        if (file_exists($path) && !$overwrite) {
            // don't break loop
            //throw new Exception('File already exists');
            return null;
        }

        return $path;
    }

    private static function getCache()
    {
        $c = DC_TPL_CACHE . '/packman';
        if (!file_exists($c)) {
            @mkdir($c);
        }
        if (!is_writable($c)) {
            throw new Exception('Failed to get temporary directory');
        }

        return $c;
    }
}