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<?php

//

// +----------------------------------------------------------------------+

// | PEAR :: DB_NestedSet_Output                                          |

// +----------------------------------------------------------------------+

// | Copyright (c) 1997-2003 The PHP Group                                |

// +----------------------------------------------------------------------+

// | This source file is subject to version 2.0 of the PHP license,       |

// | that is bundled with this package in the file LICENSE, and is        |

// | available at through the world-wide-web at                           |

// | http://www.php.net/license/2_02.txt.                                 |

// | If you did not receive a copy of the PHP license and are unable to   |

// | obtain it through the world-wide-web, please send a note to          |

// | license@php.net so we can mail you a copy immediately.               |

// +----------------------------------------------------------------------+

// | Authors: Daniel Khan <dk@webcluster.at>                              |

// |          Jason Rust  <jason@rustyparts.com>                          |

// +----------------------------------------------------------------------+

// $Id: Output.php,v 1.11 2003/10/07 00:11:27 datenpunk Exp $

//

require_once 'PEAR.php';

// {{{ constants

define('NESEO_ERROR_NO_METHOD',    'E1000');

define('NESEO_DRIVER_NOT_FOUND',   'E1100');

define('NESEO_ERROR_NO_OPTIONS',   'E2100');

// }}}

// {{{ DB_NestedSet_Output:: class

/**

* DB_NestedSet_Output is a unified API for other output drivers

* Status is beta

*

* At the moment PEAR::HTML_TreeMenu written by Jason Rust is supported

* A driver for treemenu.org will follow soon.

*

* Usage example:

*

* require_once('DB_NestedSet/NestedSet/Output.php');

* $icon         = 'folder.gif';

* $expandedIcon = 'folder-expanded.gif';

* // get data (important to fetch it as an array, using the true flag)

* $data = $NeSe->getAllNodes(true);

* // change the events for one of the elements

* $data[35]['events'] = array('onexpand' => 'alert("we expanded!");');

* // add links to each item

* foreach ($data as $a_data) {

*   $a_data['link'] = 'http://foo.com/foo.php?' . $a_data['id'];

* }

* $params = array(

* 'structure' => $data,

* 'options' => array(

* 'icon' => $icon,

* 'expandedIcon' => $expandedIcon,

* ),

* 'textField' => 'name',

* 'linkField' => 'link',

* );

* $menu =& DB_NestedSet_Output::factory('TreeMenu', $params);

* $menu->printListbox();

*

* @author       Daniel Khan <dk@webcluster.at>

* @package      DB_NestedSet

* @version      $Revision: 1.11 $

* @access       public

*

*/

// }}}

class DB_NestedSet_Output {

    // {{{ properties

    /**

    * @var object The tree menu structure

    * @access private

    */

    var $_structTreeMenu    = false;

    /**

    * @var array Array of options to be passed to the ouput methods

    * @access public

    */

    var $options    = array();

    // }}}

    // {{{ factory()

    /**

    * Returns a output driver object

    *

    * @param array $params A DB_NestedSet nodeset

    * @param string $driver (optional) The driver, such as TreeMenu (default)

    *

    * @access public

    * @return object The DB_NestedSet_Ouput object

    */

    function &factory ($params, $driver = 'TreeMenu') {

        $path = dirname(__FILE__).'/'.$driver.'.php';

        if(is_dir($path) || !file_exists($path)) {

            PEAR::raiseError("The output driver '$driver' wasn't found", NESEO_DRIVER_NOT_FOUND, PEAR_ERROR_TRIGGER, E_USER_ERROR);

        }

        require_once($path);

        $driverClass = 'DB_NestedSet_'.$driver;

        return new $driverClass($params);

    }

    // }}}

    // {{{ setOptions()

    /**

    * Set's options for a specific output group (printTree, printListbox)

    * This enables you to set specific options for each output method

    *

    * @param string $group Output group ATM 'printTree' or 'printListbox'

    * @param array $options Hash with options

    *

    * @access public

    * @return bool

    */

    function setOptions($group, $options) {

        $this->options[$group] = $options;

        return true;

    }

    // }}}

    // {{{ _getOptions()

    /**

    * Get's all option for a specific output group (printTree, printListbox)

    *

    * @param string $group Output group ATM 'printTree' or 'printListbox'

    *

    * @access private

    * @return array Options

    */

    function _getOptions($group) {

        if (!isset($this->options[$group])) {

            return array();

        }

        return $this->options[$group];

    }

    // }}}

    // {{{ printTree()

    /**

    * Print's the current tree using the output driver

    * Overriden by the driver class

    *

    * @access public

    */

    function printTree() {

        PEAR::raiseError("Method not available for this driver", NESEO_ERROR_NO_METHOD, PEAR_ERROR_TRIGGER, E_USER_ERROR);

    }

    // }}}

    // {{{ printListbox()

    /**

    * Print's a listbox representing the current tree

    * Overriden by the driver class

    *

    * @access public

    */

    function printListbox() {

        PEAR::raiseError("Method not available for this driver", NESEO_ERROR_NO_METHOD, PEAR_ERROR_TRIGGER, E_USER_ERROR);

    }

    // }}}

    // {{{ toHTML()

    /**

     * Returns the HTML for the DHTML-menu. This method can be

     * used instead of printMenu() to use the menu system

     * with a template system.

     *

     * @access public

     * @return string The HTML for the menu

     * @author Emanuel Zueger

     */

    function tree_toHTML() {

        PEAR::raiseError("Method not available for this driver", NESEO_ERROR_NO_METHOD, PEAR_ERROR_TRIGGER, E_USER_ERROR);

    }

    // }}}

    // {{{ listbox_toHTML()

    /**

     * Returns the HTML for the listbox. This method can be

     * used instead of printListbox() to use the menu system

     * with a template system.

     *

     * @access public

     * @return string The HTML for the listbox

     * @author Emanuel Zueger

     */

    function listbox_toHTML() {

        PEAR::raiseError("Method not available for this driver", NESEO_ERROR_NO_METHOD, PEAR_ERROR_TRIGGER, E_USER_ERROR);

    }

    // }}}

}

?>