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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
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/**
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 * @package    backup-convert
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 * @subpackage cc-library
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 * @copyright  2011 Darko Miletic <dmiletic@moodlerooms.com>
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 * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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 */
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require_once('cc_interfaces.php');
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abstract class cc_converter {
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    /**
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     *
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     * Enter description here ...
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     * @var cc_item
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     */
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    protected $item     = null;
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    /**
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     *
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     * Enter description here ...
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     * @var cc_manifest
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     */
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    protected $manifest = null;
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    /**
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     *
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     * Enter description here ...
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     * @var string
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     */
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    protected $rootpath = null;
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    /**
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     *
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     * Enter description here ...
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     * @var string
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     */
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    protected $path     = null;
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    /**
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     *
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     * Enter description here ...
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     * @var string
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     */
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    protected $defaultfile = null;
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    /**
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     *
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     * Enter description here ...
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     * @var string
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     */
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    protected $defaultname = null;
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    /**
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     *
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     * Enter description here ...
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     * @var string
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     */
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    protected $cc_type = null;
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    /**
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     *
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     * Document
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     * @var XMLGenericDocument
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     */
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    protected $doc = null;
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    /**
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     *
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     * ctor
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     * @param  cc_i_item $item
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     * @param  cc_i_manifest $manifest
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     * @param  string $rootpath
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     * @param  string $path
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     * @throws InvalidArgumentException
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     */
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    public function __construct(cc_i_item &$item, cc_i_manifest &$manifest, $rootpath, $path) {
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        $rpath = realpath($rootpath);
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        if (empty($rpath)) {
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            throw new InvalidArgumentException('Invalid path!');
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        }
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        $rpath2 = realpath($path);
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        if (empty($rpath)) {
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            throw new InvalidArgumentException('Invalid path!');
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        }
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        $doc = new XMLGenericDocument();
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        if (!$doc->load($path . DIRECTORY_SEPARATOR . $this->defaultfile)) {
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            throw new RuntimeException('File does not exist!');
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        }
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        $this->doc      = $doc;
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        $this->item     = $item;
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        $this->manifest = $manifest;
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        $this->rootpath = $rpath;
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        $this->path     = $rpath2;
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    }
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    /**
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     *
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     * performs conversion
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     * @param string $outdir - root directory of common cartridge
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     * @return boolean
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     */
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    abstract public function convert($outdir);
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    /**
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     *
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     * Is the element visible in the course?
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     * @throws RuntimeException
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     * @return bool
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     */
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    protected function is_visible() {
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        $tdoc = new XMLGenericDocument();
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        if (!$tdoc->load($this->path . DIRECTORY_SEPARATOR . 'module.xml')) {
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            throw new RuntimeException('File does not exist!');
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        }
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        $visible = (int)$tdoc->nodeValue('/module/visible');
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        return ($visible > 0);
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    }
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    /**
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     *
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     * Stores any files that need to be stored
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     */
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    protected function store(general_cc_file $doc, $outdir, $title, $deps = null) {
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        $rdir = new cc_resource_location($outdir);
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        $rtp = $rdir->fullpath(true).$this->defaultname;
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        if ( $doc->saveTo($rtp) ) {
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            $resource = new cc_resource($rdir->rootdir(), $this->defaultname, $rdir->dirname(true));
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            $resource->dependency = empty($deps) ? array() : $deps;
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            $resource->instructoronly = !$this->is_visible();
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            $res = $this->manifest->add_resource($resource, null, $this->cc_type);
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            $resitem = new cc_item();
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            $resitem->attach_resource($res[0]);
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            $resitem->title = $title;
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            $this->item->add_child_item($resitem);
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        } else {
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            throw new RuntimeException("Unable to save file {$rtp}!");
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        }
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    }
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}