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<?php

//

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

// | PEAR :: DB_NestedSet_TreeMenu                                        |

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

// | 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: Jason Rust <jrust@rustyparts.com>                           |

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

//

// $Id: TreeMenu.php,v 1.13 2003/10/07 00:11:27 datenpunk Exp $

//

require_once 'HTML/TreeMenu.php';

// {{{ DB_NestedSet_TreeMenu:: class

/**

* A helper class to translate the data from a nested set table into a HTML_TreeMenu object

* so that it can be used to create a dynamic tree menu using the PEAR HTML_TreeMenu class.

*

* @see          docs/TreeMenu_example.php

* @author       Jason Rust <jrust@rustyparts.com>

* @package      DB_NestedSet

* @version      $Revision: 1.13 $

* @access       public

*/

// }}}

class DB_NestedSet_TreeMenu extends DB_NestedSet_Output {

    // {{{ properties

    /**

    * @var array The current menu structure

    * @access private

    */

    var $_structTreeMenu = false;

    // }}}

    // {{{ DB_NestedSet_TreeMenu

    function &DB_NestedSet_TreeMenu($params) {

        $this->_structTreeMenu =& $this->_createFromStructure($params);

    }

    // }}}

    // {{{ _createFromStructure()

    /**

    * <pre>Creates a HTML_TreeMenu structure based off of the results from getAllNodes() method

    * of the DB_NestedSet class.  The needed parameters are:

    * o 'structure' => the result from $nestedSet->getAllNodes(true)

    * o 'textField' => the field in the table that has the text for node

    * o 'linkField' => the field in the table that has the link for the node

    * o 'options' => (optional) an array of any additional options to pass to the node when

    * Additionally these parameters may be added to the individual nodes to control their

    * behavior:

    * o 'ensureVisible' => (optional) whether or not the field should be forced as visible

    *                creating it such as 'icon' or 'expandedIcon'

    * o 'events' => (optional) an array of any events to pass to the node when creating it

    *               such as 'onclick' or 'onexpand'</pre>

    * </pre>

    * @access public

    * @return object A HTML_TreeMenu object

    */

    function &_createFromStructure($params)

    {

        // Basically we go through the array of nodes checking to see

        // if each node has children and if so recursing.  The reason this

        // works is because the data from getAllNodes() is ordered by level

        // so a root node will always be first, and sub children will always

        // be after them.

        if (!isset($params['treeMenu'])) {

            $treeMenu =& new HTML_TreeMenu();

        } else {

            $treeMenu =& $params['treeMenu'];

        }

        // always start at level 1

        if (!isset($params['currentLevel'])) {

            $params['currentLevel'] = 1;

        }

        // have to use a while loop here because foreach works on a copy of the array and

        // the child nodes are passed by reference during the recursion so that the parent

        // will know when they have been hit.

        reset($params['structure']);

        while(list($key, $node) = each($params['structure'])) {

            // see if we've already been here before

            if (isset($node['hit'])) {

                continue;

            }

            // mark that we've hit this node

            $params['structure'][$key]['hit'] = $node['hit'] = true;

            $tag = array(

            'text' => $node[$params['textField']],

            'link' => $node[$params['linkField']],

            'ensureVisible' => isset($node['ensureVisible']) ? $node['ensureVisible'] : false,

            );

            $options = isset($params['options']) ? array_merge($params['options'], $tag) : $tag;

            $events = isset($node['events']) ? $node['events'] : array();

            $parentNode =& $treeMenu->addItem(new HTML_TreeNode($options, $events));

            // see if it has children

            if (($node['r'] - 1) != $node['l']) {

                $children = array();

                // harvest all the children

                $tempStructure = $params['structure'];

                foreach ($tempStructure as $childKey => $childNode) {

                    if (!isset($childNode['hit']) &&

                    $childNode['l'] > $node['l'] &&

                    $childNode['r'] < $node['r'] &&

                    $childNode['rootid'] == $node['rootid']) {

                        // important that we assign it by reference here, so that when the child

                        // marks itself 'hit' the parent loops will know

                        $children[] =& $params['structure'][$childKey];

                    }

                }

                $recurseParams = $params;

                $recurseParams['structure'] = $children;

                $recurseParams['treeMenu'] =& $parentNode;

                $recurseParams['currentLevel']++;

                $this->_createFromStructure($recurseParams);

            }

        }

        return $treeMenu;

    }

    // }}}

    // {{{ printTree()

    /**

    * Print's the current tree using the output driver

    *

    * @access public

    */

    function printTree() {

        $options = $this->_getOptions('printTree');

        $tree =& new HTML_TreeMenu_DHTML($this->_structTreeMenu, $options);

        $tree->printMenu();

    }

    // }}}

    // {{{ printListbox()

    /**

    * Print's a listbox representing the current tree

    *

    * @access public

    */

    function printListbox() {

        $options = $this->_getOptions('printListbox');

        $listBox  =& new HTML_TreeMenu_Listbox($this->_structTreeMenu, $options);

        $listBox->printMenu();

    }

    // }}}

    // }}}

    // {{{ tree_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() {

        $options = $this->_getOptions('toHTML');

        $tree  =& new HTML_TreeMenu_DHTML($this->_structTreeMenu, $options);

        return $tree->toHTML();

    }

    // }}}

    // {{{ 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() {

        $options = $this->_getOptions('toHTML');

        $listBox  =& new HTML_TreeMenu_Listbox($this->_structTreeMenu, $options);

        return $listBox->toHTML();

    }

    // }}}

}

?>