Proyectos de Subversion Moodle

<?php

// This file is part of Moodle - http://moodle.org/

//

// Moodle is free software: you can redistribute it and/or modify

// it under the terms of the GNU General Public License as published by

// the Free Software Foundation, either version 3 of the License, or

// (at your option) any later version.

//

// Moodle is distributed in the hope that it will be useful,

// but WITHOUT ANY WARRANTY; without even the implied warranty of

// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

// GNU General Public License for more details.

//

// You should have received a copy of the GNU General Public License

// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.

/**

* @package    backup-convert

* @subpackage cc-library

* @copyright  2011 Darko Miletic <dmiletic@moodlerooms.com>

* @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later

*/

require_once 'cc_utils.php';

require_once 'cc_version_base.php';

require_once 'cc_resources.php';

require_once 'cc_manifest.php';

/**

 * Organization Class

 *

 */

class cc_organization implements cc_i_organization {

    public $title         = null;

    public $identifier    = null;

    public $structure     = null;

    public $itemlist      = null;

    private $metadata      = null;

    private $sequencing    = null;

    /** @var bool true if empty, otherwise false. */

    protected $isempty;

    public function __construct($node=null, $doc=null) {

        if (is_object($node) && is_object($doc)) {

            $this->process_organization($node,$doc);

        } else {

            $this->init_new();

        }

    }

    /**

     * Add one Item into the Organization

     *

     * @param cc_i_item $item

     */

    public function add_item(cc_i_item &$item) {

        if (is_null($this->itemlist)) {

            $this->itemlist = array();

        }

        $this->itemlist[$item->identifier] = $item;

    }

    /**

     * Add new Item into the Organization

     *

     * @param string $title

     * @return cc_i_item

     */

    public function add_new_item($title='') {

        $nitem = new cc_item();

        $nitem->title = $title;

        $this->add_item($nitem);

        return $nitem;

    }

    public function has_items() {

        return is_array($this->itemlist) && (count($this->itemlist) > 0);

    }

    public function attr_value(&$nod, $name, $ns=null) {

      return is_null($ns) ?

             ($nod->hasAttribute($name) ? $nod->getAttribute($name) : null) :

             ($nod->hasAttributeNS($ns, $name) ? $nod->getAttributeNS($ns, $name) : null);

    }

    public function process_organization(&$node,&$doc) {

        $this->identifier   = $this->attr_value($node,"identifier");

        $this->structure    = $this->attr_value($node,"structure");

        $this->title        = '';

        $nlist              = $node->getElementsByTagName('title');

        if (is_object($nlist) && ($nlist->length > 0) ) {

            $this->title = $nlist->item(0)->nodeValue;

        }

        $nlist = $doc->nodeList("//imscc:organization[@identifier='".$this->identifier."']/imscc:item");

        $this->itemlist=array();

        foreach ($nlist as $item) {

            $this->itemlist[$item->getAttribute("identifier")] = new cc_item($item,$doc);

        }

        $this->isempty=false;

    }

    public function init_new() {

        $this->title        = null;

        $this->identifier   = cc_helpers::uuidgen('O_');

        $this->structure    = 'rooted-hierarchy';

        $this->itemlist     = null;

        $this->metadata     = null;

        $this->sequencing   = null;

    }

    public function uuidgen() {

        $uuid = sprintf('%04x%04x', mt_rand(0, 65535), mt_rand(0, 65535));

        return strtoupper(trim($uuid));

    }

}

/**

 * Item Class

 *

 */

class cc_item implements cc_i_item  {

    public $identifier     = null;

    public $identifierref  = null;

    public $isvisible      = null;

    public $title          = null;

    public $parameters     = null;

    public $childitems     = null;

    private $parentItem     = null;

    private $isempty        = true;

    /** @var mixed node structure. */

    public $structure;

    public function __construct($node=null,$doc=null) {

        if (is_object($node)) {

            $clname = get_class($node);

            if ($clname =='cc_resource') {

                $this->init_new_item();

                $this->identifierref = $node->identifier;

                $this->title = is_string($doc) && (!empty($doc)) ? $doc : 'item';

            } else if ($clname =='cc_manifest') {

                $this->init_new_item();

                $this->identifierref = $node->manifestID();

                $this->title = is_string($doc) && (!empty($doc)) ? $doc : 'item';

            } else if ( is_object($doc)){

                $this->process_item($node,$doc);

            } else {

                $this->init_new_item();

            }

        } else {

            $this->init_new_item();

        }

    }

    public function attr_value(&$nod, $name, $ns=null) {

      return is_null($ns) ?

             ($nod->hasAttribute($name) ? $nod->getAttribute($name) : null) :

             ($nod->hasAttributeNS($ns, $name) ? $nod->getAttributeNS($ns, $name) : null);

    }

    public function process_item(&$node,&$doc) {

        $this->identifier       = $this->attr_value($node,"identifier");

        $this->structure        = $this->attr_value($node,"structure");

        $this->identifierref    = $this->attr_value($node,"identifierref");

        $atr = $this->attr_value($node,"isvisible");

        $this->isvisible = is_null($atr) ? true : $atr;

        $nlist = $node->getElementsByTagName('title');

        if (is_object($nlist) && ($nlist->length > 0) ) {

            $this->title = $nlist->item(0)->nodeValue;

        }

        $nlist = $doc->nodeList("//imscc:item[@identifier='".$this->identifier."']/imscc:item");

        if ($nlist->length > 0) {

            $this->childitems=array();

            foreach ($nlist as $item) {

                $key=$this->attr_value($item,"identifier");

                $this->childitems[$key] = new cc_item($item,$doc);

            }

        }

        $this->isempty = false;

    }

    /**

     * Add one Child Item

     *

     * @param cc_i_item $item

     */

    public function add_child_item(cc_i_item &$item) {

        if (is_null($this->childitems)) {

            $this->childitems = array();

        }

        $this->childitems[$item->identifier] = $item;

    }

    /**

     * Add new child Item

     *

     * @param string $title

     * @return cc_i_item

     */

    public function add_new_child_item($title='') {

        $sc         = new cc_item();

        $sc->title  = $title;

        $this->add_child_item($sc);

        return $sc;

    }

    public function attach_resource($resource) {

        if ($this->has_child_items()) {

            throw new Exception("Can not attach resource to item that contains other items!");

        }

        $resident = null;

        if (is_string($resource)) {

            $resident = $resource;

        } else if (is_object($resource)) {

            $clname = get_class($resource);

            if ($clname == 'cc_resource') {

                $resident = $resource->identifier;

            } else

            if ($clname == 'cc_manifest') {

                $resident = $resource->manifestID();

            } else {

                throw new Exception("Unable to attach resource. Invalid object.");

            }

        }

        if (is_null($resident) || (empty($resident))) {

            throw new Exception("Resource must have valid identifier!");

        }

        $this->identifierref = $resident;

    }

    public function has_child_items() {

        return is_array($this->childitems) && (count($this->childitems) > 0);

    }

    public function child_item($identifier) {

        return $this->has_child_items() ? $this->childitems[$identifier] : null;

    }

    public function init_clean() {

            $this->identifier   = null;

            $this->isvisible    = null;

            $this->title        = null;

            $this->parameters   = null;

            $this->childitems   = null;

            $this->parentItem   = null;

            $this->isempty      = true;

    }

    public function init_new_item() {

            $this->identifier   = cc_helpers::uuidgen('I_');

            $this->isvisible    = true; //default is true

            $this->title        = null;

            $this->parameters   = null;

            $this->childitems   = null;

            $this->parentItem   = null;

            $this->isempty      = false;

    }

}