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<?php |
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// |
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// +----------------------------------------------------------------------+ |
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// | PHP Version 4 | |
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// +----------------------------------------------------------------------+ |
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// | Copyright (c) 1997-2003 The PHP Group | |
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// +----------------------------------------------------------------------+ |
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// | This source file is subject to version 2.02 of the PHP license, | |
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// | that is bundled with this package in the file LICENSE, and is | |
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// | available at through the world-wide-web at | |
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// | http://www.php.net/license/2_02.txt. | |
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// | If you did not receive a copy of the PHP license and are unable to | |
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// | obtain it through the world-wide-web, please send a note to | |
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// | license@php.net so we can mail you a copy immediately. | |
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// +----------------------------------------------------------------------+ |
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// | Authors: Wolfram Kriesing <wolfram@kriesing.de> | |
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// +----------------------------------------------------------------------+ |
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// |
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// Id: DBsimple.php,v 1.11 2003/01/18 15:36:50 cain Exp |
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// $Id: DBsimple.php,v 1.11 2003/01/18 15:36:50 cain Exp $ |
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|
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require_once('Tree/OptionsDB.php'); |
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require_once('Tree/Error.php'); |
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|
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/** |
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* the DB interface to the tree class |
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* |
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* @access public |
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* @author Wolfram Kriesing <wolfram@kriesing.de> |
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* @version 2001/06/27 |
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* @package Tree |
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*/ |
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class Tree_Memory_DBsimple extends Tree_OptionsDB |
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// FIXXME should actually extend Tree_Common, to use the methods provided in there... but we need to connect |
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// to the db here, so we extend optionsDB for now, may be use "aggregate" function to fix that |
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{ |
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|
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/** |
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* @access public |
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* @var array saves the options passed to the constructor |
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*/ |
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var $options = array( 'order' =>'', // which column to order by when reading the data from the DB, this sorts the data even inside every level |
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'whereAddOn'=>'', // add on for the where clause, this string is simply added behind the WHERE in the select |
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// so you better make sure its correct SQL :-), i.e. 'uid=3' |
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// this is needed i.e. when you are saving many trees for different user |
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// in one table where each entry has a uid (user id) |
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'table' =>'', // |
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// the column-name maps are used for the "as" in the select queries |
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// so you can use any column name in the table and "map" it to the name that shall be used in the |
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// internal array, that is built, see the examples (in comments) |
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'columnNameMaps'=>array( |
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/* 'id' => 'tree_id', // use "tree_id" as "id" |
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'parentId' => 'parent_id', |
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'prevId' => 'previous_id', |
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'name' => 'nodeName' |
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*/ |
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), |
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); |
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|
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/** |
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* @access public |
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* @var string the table where to read the tree data from |
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* can also be set using the DSN in the constructor |
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*/ |
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var $table; |
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|
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/** |
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* @access private |
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* @var object $dbh the handle to the DB-object |
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*/ |
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// var $dbh; |
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|
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/** |
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* set up this object |
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* |
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* @version 2001/06/27 |
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* @access public |
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* @author Wolfram Kriesing <wolfram@kriesing.de> |
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* @param string $dsn this is a DSN of the for that PEAR::DB uses it |
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* only that additionally you can add parameters like ...?table=test_table |
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* to define the table it shall work on |
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* @param array $options additional options you can set |
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*/ |
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function Tree_Memory_DBsimple( $dsn , $options=array() ) |
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{ |
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$this->Tree_OptionsDB( $dsn , $options ); // instanciate DB |
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if( is_string($options) ) // just to be backward compatible, or to make the second paramter shorter |
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{ |
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$this->setOption( 'order' , $options ); |
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} |
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|
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$this->table = $this->getOption('table'); |
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|
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} // end of function |
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|
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/** |
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* retreive all the navigation data from the db and call build to build the |
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* tree in the array data and structure |
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* |
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* @version 2001/11/20 |
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* @access public |
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* @author Wolfram Kriesing <wolfram@kriesing.de> |
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* @return boolean true on success |
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*/ |
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function setup() |
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{ |
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// TODO sort by prevId (parentId,prevId $addQuery) too if it exists in the table, or the root might be wrong |
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// TODO since the prevId of the root should be 0 |
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|
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// |
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$whereAddOn = ''; |
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if( $this->options['whereAddOn'] ) |
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{ |
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$whereAddOn = 'WHERE '.$this->getOption('whereAddOn'); |
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} |
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|
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// |
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$orderBy = ''; |
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if( $this->options['order'] ) |
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{ |
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$orderBy = ",".$this->options['order']; |
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} |
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|
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$map = $this->getOption('columnNameMaps'); |
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if( isset($map['parentId']) ) |
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{ |
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$orderBy = $map['parentId'].$orderBy; |
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} |
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else |
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{ |
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$orderBy = 'parentId'.$orderBy; |
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} |
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|
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// build the query this way, that the root, which has no parent (parentId=0) |
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// and no previous (prevId=0) is in first place (in case prevId is given) |
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$query = sprintf( "SELECT * FROM %s %s ORDER BY %s", |
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$this->table, |
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$whereAddOn, |
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$orderBy); //,prevId !!!! |
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if( DB::isError( $res = $this->dbh->getAll( $query ) ) ) |
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{ |
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// FIXXME remove print use debug mode instead |
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printf("ERROR - Tree::setup - %s - %s<br>",DB::errormessage($res),$query); |
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return $this->_throwError($res->getMessage(),__LINE__); |
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} |
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|
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// if the db-column names need to be mapped to different names |
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// FIXXME somehow we should be able to do this in the query, but i dont know how to select |
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// only those columns, use "as" on them and select the rest, without getting those columns again :-( |
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if( $map ) |
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foreach( $res as $id=>$aResult ) // map each result |
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{ |
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foreach( $map as $key=>$columnName ) |
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{ |
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$res[$id][$key] = $res[$id][$columnName]; |
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unset($res[$id][$columnName]); |
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} |
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} |
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|
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return $res; |
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} |
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|
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/** |
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* adds _one_ new element in the tree under the given parent |
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* the values' keys given have to match the db-columns, because the |
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* value gets inserted in the db directly |
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* to add an entire node containing children and so on see 'addNode()' |
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* |
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* to ba compatible, to the DBnested u can also give the parent and previd as the second and third parameter |
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* |
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* @see addNode() |
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* @version 2001/10/09 |
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* @access public |
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* @author Wolfram Kriesing <wolfram@kriesing.de> |
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* @param array $newValues this array contains the values that shall be inserted in the db-table |
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* the key for each element is the name of the column |
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* @return mixed either boolean false on failure or the id of the inserted row |
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*/ |
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function add( $newValues , $parentId=0 ) |
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{ |
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// FIXXME use $this->dbh->tableInfo to check which columns exist |
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// so only data for which a column exist is inserted |
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if( $parentId ) |
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$newValues['parentId'] = $parentId; |
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|
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$newData = array(); |
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foreach( $newValues as $key=>$value ) // quote the values, as needed for the insert |
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{ |
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$newData[$this->_getColName($key)] = $this->dbh->quote($value); |
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} |
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|
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// use sequences to create a new id in the db-table |
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$nextId = $this->dbh->nextId($this->table); |
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$query = sprintf("INSERT INTO %s (%s,%s) VALUES (%s,%s)", |
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$this->table , |
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$this->_getColName('id'), |
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implode( ',' , array_keys($newData) ) , |
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$nextId, |
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implode( ',' , $newData ) ); |
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if( DB::isError( $res = $this->dbh->query( $query ) ) ) |
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{ |
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// TODO raise PEAR error |
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printf("ERROR - Tree::add - %s - %s<br>",DB::errormessage($res),$query); |
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return false; |
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} |
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|
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return $nextId; |
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} // end of function |
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|
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/** |
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* removes the given node |
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* |
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* @version 2001/10/09 |
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* @access public |
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* @author Wolfram Kriesing <wolfram@kriesing.de> |
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* @param mixed $id the id of the node to be removed, or an array of id's to be removed |
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* @return boolean true on success |
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*/ |
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function remove( $id ) |
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{ |
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// if the one to remove has children, get their id's to remove them too |
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if( $this->hasChildren($id) ) |
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$id = $this->walk( array('_remove',$this) , $id , 'array' ); |
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|
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$idColumnName = 'id'; |
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$map = $this->getOption('columnNameMaps'); |
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if( isset($map['id']) ) // if there are maps given |
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{ |
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$idColumnName = $map['id']; |
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} |
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|
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$whereClause = "WHERE $idColumnName=$id"; |
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if( is_array($id) ) |
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{ |
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$whereClause = "WHERE $idColumnName in (".implode( ',' , $id ).')'; |
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} |
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|
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$query = "DELETE FROM {$this->table} $whereClause"; |
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//print("<br>".$query); |
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if( DB::isError( $res = $this->dbh->query( $query ) ) ) |
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{ |
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// TODO raise PEAR error |
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printf("ERROR - Tree::remove - %s - %s<br>",DB::errormessage($res),$query); |
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return false; |
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} |
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// TODO if remove succeeded set prevId of the following element properly |
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|
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return true; |
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} // end of function |
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|
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/** |
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* move an entry under a given parent or behind a given entry |
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* |
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* @version 2001/10/10 |
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* @access public |
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* @author Wolfram Kriesing <wolfram@kriesing.de> |
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* @param integer $idToMove the id of the element that shall be moved |
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* @param integer $newParentId the id of the element which will be the new parent |
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* @param integer $newPrevId if prevId is given the element with the id idToMove |
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* shall be moved _behind_ the element with id=prevId |
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* if it is 0 it will be put at the beginning |
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* if no prevId is in the DB it can be 0 too and won't bother |
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* since it is not written in the DB anyway |
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* @return boolean true for success |
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*/ |
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function move( $idToMove , $newParentId , $newPrevId=0 ) |
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{ |
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|
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$idColumnName = 'id'; |
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$parentIdColumnName = 'parentId'; |
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$map = $this->getOption('columnNameMaps'); |
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if( isset($map['id']) ) |
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$idColumnName = $map['id']; |
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if( isset($map['parentId']) ) |
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$parentIdColumnName = $map['parentId']; |
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// FIXXME todo: previous stuff |
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|
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// set the parent in the DB |
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$query = "UPDATE $this->table SET $parentIdColumnName=$newParentId WHERE $idColumnName=$idToMove"; |
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//print($query); |
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if( DB::isError( $res = $this->dbh->query( $query ) ) ) |
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{ |
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// TODO raise PEAR error |
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printf("ERROR - Tree::move - %s - %s<br>",DB::errormessage($res),$query); |
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return false; |
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} |
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// FIXXME update the prevId's of the elements where the element was moved away from and moved in |
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|
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return true; |
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} // end of function |
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|
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/** |
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* update an element in the DB |
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* |
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* @version 2002/01/17 |
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* @access public |
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* @author Wolfram Kriesing <wolfram@kriesing.de> |
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* @param array $newData all the new data, the key 'id' is used to |
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* build the 'WHERE id=' clause and all the other |
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* elements are the data to fill in the DB |
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* @return boolean true for success |
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*/ |
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function update( $id , $newData ) |
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{ |
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|
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// FIXXME check $this->dbh->tableInfo to see if all the columns that shall be updated |
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// really exist, this will also extract nextId etc. if given before writing it in the DB |
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// in case they dont exist in the DB |
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$setData = array(); |
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foreach( $newData as $key=>$value ) // quote the values, as needed for the insert |
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{ |
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$setData[] = $this->_getColName($key).'='.$this->dbh->quote($value); |
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} |
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|
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$query = sprintf( 'UPDATE %s SET %s WHERE %s=%s', |
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$this->table, |
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implode( ',' , $setData ), |
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$this->_getColName('id'), |
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$id |
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); |
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if( DB::isError( $res=$this->dbh->query($query) ) ) |
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{ |
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// FIXXME raise PEAR error |
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printf("ERROR - Tree::update - %s - %s<br>",DB::errormessage($res),$query); |
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return false; |
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} |
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|
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return true; |
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} // end of function |
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|
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/** |
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* |
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* |
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* @access private |
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* @version 2002/03/02 |
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* @author Wolfram Kriesing <wolfram@kriesing.de> |
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* @param |
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* @return |
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*/ |
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function _throwError( $msg , $line , $mode=null ) |
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{ |
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return new Tree_Error( $msg , $line , __FILE__ , $mode , $this->db->last_query ); |
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} |
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|
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|
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|
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/** |
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* prepare multiple results |
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* |
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* @see _prepareResult() |
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* @access private |
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* @version 2002/03/03 |
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* @author Wolfram Kriesing <wolfram@kriesing.de> |
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* @param |
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* @return |
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*/ |
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function _prepareResults( $results ) |
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{ |
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$newResults = array(); |
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foreach( $results as $aResult ) |
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$newResults[] = $this->_prepareResult($aResult); |
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return $newResults; |
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} |
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|
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/** |
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* map back the index names to get what is expected |
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* |
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* @access private |
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* @version 2002/03/03 |
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* @author Wolfram Kriesing <wolfram@kriesing.de> |
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* @param |
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* @return |
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*/ |
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function _prepareResult( $result ) |
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{ |
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$map = $this->getOption('columnNameMaps'); |
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|
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if( $map ) |
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foreach( $map as $key=>$columnName ) |
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{ |
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$result[$key] = $result[$columnName]; |
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unset($result[$columnName]); |
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} |
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return $result; |
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} |
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|
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/** |
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* this method retreives the real column name, as used in the DB |
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* since the internal names are fixed, to be portable between different |
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* DB-column namings, we map the internal name to the real column name here |
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* |
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* @access private |
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* @version 2002/03/02 |
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* @author Wolfram Kriesing <wolfram@kriesing.de> |
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* @param |
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* @return |
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*/ |
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function _getColName( $internalName ) |
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{ |
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if( $map = $this->getOption( 'columnNameMaps' ) ) |
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{ |
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if( isset($map[$internalName]) ) |
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return $map[$internalName]; |
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} |
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return $internalName; |
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} |
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|
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|
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} // end of class |
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?> |
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