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<?php |
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// |
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// $Id: Memory_DBsimple.php,v 1.2 2003/01/30 17:43:41 cain Exp $ |
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// |
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|
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//ini_set('include_path',realpath(dirname(__FILE__).'/../../').':'.realpath(dirname(__FILE__).'/../../../includes').':'.ini_get('include_path')); |
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//ini_set('error_reporting',E_ALL); |
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|
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/** |
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* this is a helper function, so i dont have to write so many prints :-) |
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* @param array $para the result returned by some method, that will be dumped |
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* @param string $string the explaining string |
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*/ |
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function dumpHelper( $para , $string='' , $addArray=false ) |
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{ |
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global $tree,$element; |
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|
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if( $addArray ) |
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eval( "\$res=array(".$para.');' ); |
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else |
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eval( "\$res=".$para.';' ); |
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|
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print '<b>'.$para.' </b><i><u><font color="#008000">'.$string.'</font></u></i><br>'; |
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// this method dumps to the screen, since print_r or var_dump dont |
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// work too good here, because the inner array is recursive |
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// well, it looks ugly but one can see what is meant :-) |
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$tree->varDump($res); |
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print '<br>'; |
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|
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} |
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|
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/** |
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* dumps the entire structure nicely |
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* @param string $string the explaining string |
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*/ |
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function dumpAllNicely( $string='' ) |
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{ |
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global $tree; |
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|
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print '<i><u><font color="#008000">'.$string.'</font></u></i><br>'; |
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$all = $tree->getNode(); // get the entire structure sorted as the tree is, so we can simply foreach through it and show it |
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foreach( $all as $aElement ) |
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{ |
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for( $i=0 ; $i<$aElement['level'] ; $i++) |
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print ' '; |
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print $aElement['name'].' ===> '; |
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$tree->varDump(array($aElement)); |
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} |
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print '<br>'; |
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|
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} |
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|
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|
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/* |
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|
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use this to build the db table |
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|
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CREATE TABLE test_tree ( |
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id int(11) NOT NULL auto_increment, |
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parentId int(11) NOT NULL default '0', |
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name varchar(255) NOT NULL default '', |
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PRIMARY KEY (id) |
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) |
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|
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|
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This example demonstrates how to manage trees |
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that are saved in a DB, it uses a very simple |
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DB-structure, not nested trees (ok, that sucks, but it can be implemented :-) ) |
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|
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it reads out the entire tree upon calling the method |
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'setup', then you can work on the tree in whichever way |
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you want, just have a look at the examples |
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there are different ways to achieve things, |
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i will try to demonstrate (all of) them |
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|
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*/ |
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|
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require_once('Tree/Tree.php'); |
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|
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// define the DB-table where the data shall be read from |
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$options = array( 'table' => 'test_tree', |
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'order' => 'id' // when reading the data from the db sort them by id, this is only for ensuring |
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// for 'getNext' of "myElement/subElement" in this example to find "myElement/anotherSubElement" |
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// you can simply sort it by "name" and it would be in alphabetical order |
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); |
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|
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// calling 'setupMemory' means to retreive a class, which works on trees, |
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// that are temporarily stored in the memory, in an array |
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// this means the entire tree is available at all time |
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// consider the resource usage and it's not to suggested to work |
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// on huge trees (upto 1000 elements it should be ok, depending on your environment and requirements) |
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// using 'setupMemory' |
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$tree = Tree::setupMemory( 'DBsimple', // use the simple DB schema |
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'mysql://root@localhost/test', // the DSN |
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$options); // pass the options we had assigned up there |
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|
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// add a new root element in the tree |
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$parentId = $tree->add(array( 'name'=>'myElement')); |
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|
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// add an element under the new element we added |
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$id = $tree->add(array( 'name'=>'subElement') , $parentId ); |
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|
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// add another element under the parent element we added |
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$id = $tree->add(array( 'name'=>'anotherSubElement') , $parentId ); |
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|
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// call 'setup', to build the inner array, so we can work on the structure using the |
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// given methods |
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$tree->setup(); |
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|
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dumpAllNicely( 'dump all after creation' ); |
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|
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// get the path of the last inserted element |
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dumpHelper( '$tree->getPath( '.$id.' )' , 'dump the path from "myElement/anotherSubElement"' ); |
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|
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print "tree->getIdByPath('myElement/subElement')=".$id = $tree->getIdByPath('myElement/subElement'); |
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dumpHelper( '$tree->getParent('.$id.')' , 'dump the parent of "myElement/subElement"' , true ); |
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// you can also use: $tree->data[$id]['parent'] |
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|
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$id = $tree->getIdByPath('myElement'); |
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dumpHelper( '$tree->getChild('.$id.')' , 'dump the child of "myElement"' , true ); |
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// you can also use: $tree->data[$id]['child'] |
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|
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$id = $tree->getIdByPath('myElement'); |
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dumpHelper( '$tree->getChildren('.$id.')' , 'dump the children of "myElement"' ); |
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// you can also use: $tree->data[$id]['children'] |
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|
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$id = $tree->getIdByPath('myElement/subElement'); |
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dumpHelper( '$tree->getNext('.$id.')' , 'dump the "next" of "myElement/subElement"' , true ); |
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// you can also use: $tree->data[$id]['next'] |
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|
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$id = $tree->getIdByPath('myElement/anotherSubElement'); |
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dumpHelper( '$tree->getPrevious('.$id.')' , 'dump the "previous" of "myElement/anotherSubElement"' , true ); |
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// you can also use: $tree->data[$id]['previous'] |
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|
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$id = $tree->getIdByPath('myElement'); |
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$element = $tree->data[$id]['child']['next']['parent']; // refer to yourself again, in a very complicated way :-) |
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dumpHelper( '$element[\'id\']' , 'demo of using the internal array, for referencing tree-nodes, see the code' ); |
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|
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$id = $tree->getIdByPath('myElement'); |
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$element = $tree->data[$id]['child']['next']; // refer to the second child of 'myElement' |
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dumpHelper( '$element[\'id\']' , 'demo2 of using the internal array, for referencing tree-nodes, see the code' ); |
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|
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$id = $tree->getIdByPath('myElement/anotherSubElement'); |
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$tree->move( $id , 0 ); |
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$tree->setup(); // rebuild the structure again, since we had changed it |
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dumpAllNicely( 'dump all, after "myElement/anotherSubElement" was moved under the root' ); |
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|
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$moveId = $tree->getIdByPath('myElement'); |
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$id = $tree->getIdByPath('anotherSubElement'); |
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$tree->move( $moveId , $id ); |
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$tree->setup(); // rebuild the structure again, since we had changed it |
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dumpAllNicely( 'dump all, after "myElement" was moved under the "anotherSubElement"' ); |
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|
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$tree->setRemoveRecursively(true); |
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$tree->remove(0); |
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print '<font color="red">ALL ELEMENTS HAVE BEEN REMOVED (uncomment this part to keep them in the DB after running this test script)</font>'; |
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|
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?> |
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