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468 lines
13 KiB
PHP
468 lines
13 KiB
PHP
<?php
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namespace RedBeanPHP;
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use RedBeanPHP\ToolBox as ToolBox;
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use RedBeanPHP\AssociationManager as AssociationManager;
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use RedBeanPHP\OODB as OODB;
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use RedBeanPHP\OODBBean as OODBBean;
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use RedBeanPHP\QueryWriter\AQueryWriter as AQueryWriter;
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/**
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* Duplication Manager
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* The Duplication Manager creates deep copies from beans, this means
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* it can duplicate an entire bean hierarchy. You can use this feature to
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* implement versioning for instance. Because duplication and exporting are
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* closely related this class is also used to export beans recursively
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* (i.e. we make a duplicate and then convert to array). This class allows
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* you to tune the duplication process by specifying filters determining
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* which relations to take into account and by specifying tables
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* (in which case no reflective queries have to be issued thus improving
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* performance). This class also hosts the Camelfy function used to
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* reformat the keys of an array, this method is publicly available and
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* used internally by exportAll().
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*
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* @file RedBeanPHP/DuplicationManager.php
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* @author Gabor de Mooij and the RedBeanPHP Community
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* @license BSD/GPLv2
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*
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* @copyright
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* copyright (c) G.J.G.T. (Gabor) de Mooij and the RedBeanPHP Community
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* This source file is subject to the BSD/GPLv2 License that is bundled
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* with this source code in the file license.txt.
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*/
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class DuplicationManager
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{
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/**
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* @var ToolBox
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*/
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protected $toolbox;
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/**
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* @var AssociationManager
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*/
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protected $associationManager;
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/**
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* @var OODB
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*/
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protected $redbean;
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/**
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* @var array
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*/
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protected $tables = array();
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/**
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* @var array
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*/
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protected $columns = array();
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/**
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* @var array
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*/
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protected $filters = array();
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/**
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* @var array
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*/
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protected $cacheTables = FALSE;
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/**
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* @var boolean
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*/
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protected $copyMeta = FALSE;
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/**
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* Copies the shared beans in a bean, i.e. all the sharedBean-lists.
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*
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* @param OODBBean $copy target bean to copy lists to
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* @param string $shared name of the shared list
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* @param array $beans array with shared beans to copy
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*
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* @return void
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*/
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private function copySharedBeans( OODBBean $copy, $shared, $beans )
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{
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$copy->$shared = array();
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foreach ( $beans as $subBean ) {
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array_push( $copy->$shared, $subBean );
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}
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}
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/**
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* Copies the own beans in a bean, i.e. all the ownBean-lists.
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* Each bean in the own-list belongs exclusively to its owner so
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* we need to invoke the duplicate method again to duplicate each bean here.
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*
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* @param OODBBean $copy target bean to copy lists to
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* @param string $owned name of the own list
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* @param array $beans array with shared beans to copy
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* @param array $trail array with former beans to detect recursion
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* @param boolean $preserveIDs TRUE means preserve IDs, for export only
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*
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* @return void
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*/
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private function copyOwnBeans( OODBBean $copy, $owned, $beans, $trail, $preserveIDs )
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{
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$copy->$owned = array();
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foreach ( $beans as $subBean ) {
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array_push( $copy->$owned, $this->duplicate( $subBean, $trail, $preserveIDs ) );
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}
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}
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/**
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* Creates a copy of bean $bean and copies all primitive properties (not lists)
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* and the parents beans to the newly created bean. Also sets the ID of the bean
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* to 0.
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*
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* @param OODBBean $bean bean to copy
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*
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* @return OODBBean
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*/
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private function createCopy( OODBBean $bean )
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{
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$type = $bean->getMeta( 'type' );
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$copy = $this->redbean->dispense( $type );
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$copy->setMeta( 'sys.dup-from-id', $bean->id );
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$copy->setMeta( 'sys.old-id', $bean->id );
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$copy->importFrom( $bean );
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if ($this->copyMeta) $copy->copyMetaFrom($bean);
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$copy->id = 0;
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return $copy;
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}
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/**
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* Generates a key from the bean type and its ID and determines if the bean
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* occurs in the trail, if not the bean will be added to the trail.
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* Returns TRUE if the bean occurs in the trail and FALSE otherwise.
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*
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* @param array $trail list of former beans
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* @param OODBBean $bean currently selected bean
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*
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* @return boolean
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*/
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private function inTrailOrAdd( &$trail, OODBBean $bean )
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{
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$type = $bean->getMeta( 'type' );
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$key = $type . $bean->getID();
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if ( isset( $trail[$key] ) ) {
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return TRUE;
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}
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$trail[$key] = $bean;
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return FALSE;
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}
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/**
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* Given the type name of a bean this method returns the canonical names
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* of the own-list and the shared-list properties respectively.
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* Returns a list with two elements: name of the own-list, and name
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* of the shared list.
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*
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* @param string $typeName bean type name
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*
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* @return array
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*/
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private function getListNames( $typeName )
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{
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$owned = 'own' . ucfirst( $typeName );
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$shared = 'shared' . ucfirst( $typeName );
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return array( $owned, $shared );
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}
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/**
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* Determines whether the bean has an own list based on
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* schema inspection from realtime schema or cache.
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*
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* @param string $type bean type to get list for
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* @param string $target type of list you want to detect
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*
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* @return boolean
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*/
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protected function hasOwnList( $type, $target )
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{
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return isset( $this->columns[$target][$type . '_id'] );
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}
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/**
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* Determines whether the bea has a shared list based on
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* schema inspection from realtime schema or cache.
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*
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* @param string $type bean type to get list for
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* @param string $target type of list you are looking for
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*
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* @return boolean
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*/
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protected function hasSharedList( $type, $target )
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{
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return in_array( AQueryWriter::getAssocTableFormat( array( $type, $target ) ), $this->tables );
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}
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/**
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* @see DuplicationManager::dup
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*
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* @param OODBBean $bean bean to be copied
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* @param array $trail trail to prevent infinite loops
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* @param boolean $preserveIDs preserve IDs
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*
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* @return OODBBean
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*/
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protected function duplicate( OODBBean $bean, $trail = array(), $preserveIDs = FALSE )
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{
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if ( $this->inTrailOrAdd( $trail, $bean ) ) return $bean;
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$type = $bean->getMeta( 'type' );
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$copy = $this->createCopy( $bean );
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foreach ( $this->tables as $table ) {
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if ( !empty( $this->filters ) ) {
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if ( !in_array( $table, $this->filters ) ) continue;
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}
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list( $owned, $shared ) = $this->getListNames( $table );
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if ( $this->hasSharedList( $type, $table ) ) {
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if ( $beans = $bean->$shared ) {
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$this->copySharedBeans( $copy, $shared, $beans );
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}
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} elseif ( $this->hasOwnList( $type, $table ) ) {
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if ( $beans = $bean->$owned ) {
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$this->copyOwnBeans( $copy, $owned, $beans, $trail, $preserveIDs );
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}
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$copy->setMeta( 'sys.shadow.' . $owned, NULL );
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}
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$copy->setMeta( 'sys.shadow.' . $shared, NULL );
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}
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$copy->id = ( $preserveIDs ) ? $bean->id : $copy->id;
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return $copy;
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}
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/**
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* Constructor,
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* creates a new instance of DupManager.
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*
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* @param ToolBox $toolbox
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*/
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public function __construct( ToolBox $toolbox )
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{
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$this->toolbox = $toolbox;
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$this->redbean = $toolbox->getRedBean();
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$this->associationManager = $this->redbean->getAssociationManager();
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}
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/**
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* Recursively turns the keys of an array into
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* camelCase.
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*
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* @param array $array array to camelize
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* @param boolean $dolphinMode whether you want the exception for IDs.
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*
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* @return array
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*/
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public function camelfy( $array, $dolphinMode = FALSE ) {
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$newArray = array();
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foreach( $array as $key => $element ) {
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$newKey = preg_replace_callback( '/_(\w)/', function( &$matches ){
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return strtoupper( $matches[1] );
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}, $key);
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if ( $dolphinMode ) {
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$newKey = preg_replace( '/(\w)Id$/', '$1ID', $newKey );
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}
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$newArray[$newKey] = ( is_array($element) ) ? $this->camelfy( $element, $dolphinMode ) : $element;
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}
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return $newArray;
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}
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/**
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* For better performance you can pass the tables in an array to this method.
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* If the tables are available the duplication manager will not query them so
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* this might be beneficial for performance.
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*
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* This method allows two array formats:
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*
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* <code>
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* array( TABLE1, TABLE2 ... )
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* </code>
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*
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* or
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*
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* <code>
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* array( TABLE1 => array( COLUMN1, COLUMN2 ... ) ... )
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* </code>
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*
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* @param array $tables a table cache array
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*
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* @return void
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*/
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public function setTables( $tables )
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{
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foreach ( $tables as $key => $value ) {
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if ( is_numeric( $key ) ) {
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$this->tables[] = $value;
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} else {
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$this->tables[] = $key;
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$this->columns[$key] = $value;
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}
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}
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$this->cacheTables = TRUE;
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}
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/**
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* Returns a schema array for cache.
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* You can use the return value of this method as a cache,
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* store it in RAM or on disk and pass it to setTables later.
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*
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* @return array
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*/
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public function getSchema()
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{
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return $this->columns;
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}
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/**
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* Indicates whether you want the duplication manager to cache the database schema.
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* If this flag is set to TRUE the duplication manager will query the database schema
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* only once. Otherwise the duplicationmanager will, by default, query the schema
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* every time a duplication action is performed (dup()).
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*
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* @param boolean $yesNo TRUE to use caching, FALSE otherwise
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*/
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public function setCacheTables( $yesNo )
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{
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$this->cacheTables = $yesNo;
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}
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/**
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* A filter array is an array with table names.
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* By setting a table filter you can make the duplication manager only take into account
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* certain bean types. Other bean types will be ignored when exporting or making a
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* deep copy. If no filters are set all types will be taking into account, this is
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* the default behavior.
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*
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* @param array $filters list of tables to be filtered
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*
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* @return void
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*/
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public function setFilters( $filters )
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{
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if ( !is_array( $filters ) ) {
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$filters = array( $filters );
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}
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$this->filters = $filters;
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}
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/**
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* Makes a copy of a bean. This method makes a deep copy
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* of the bean.The copy will have the following features.
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* - All beans in own-lists will be duplicated as well
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* - All references to shared beans will be copied but not the shared beans themselves
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* - All references to parent objects (_id fields) will be copied but not the parents themselves
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* In most cases this is the desired scenario for copying beans.
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* This function uses a trail-array to prevent infinite recursion, if a recursive bean is found
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* (i.e. one that already has been processed) the ID of the bean will be returned.
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* This should not happen though.
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*
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* Note:
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* This function does a reflectional database query so it may be slow.
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*
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* Note:
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* this function actually passes the arguments to a protected function called
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* duplicate() that does all the work. This method takes care of creating a clone
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* of the bean to avoid the bean getting tainted (triggering saving when storing it).
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*
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* @param OODBBean $bean bean to be copied
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* @param array $trail for internal usage, pass array()
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* @param boolean $preserveIDs for internal usage
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*
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* @return OODBBean
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*/
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public function dup( OODBBean $bean, $trail = array(), $preserveIDs = FALSE )
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{
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if ( !count( $this->tables ) ) {
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$this->tables = $this->toolbox->getWriter()->getTables();
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}
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if ( !count( $this->columns ) ) {
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foreach ( $this->tables as $table ) {
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$this->columns[$table] = $this->toolbox->getWriter()->getColumns( $table );
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}
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}
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$rs = $this->duplicate( ( clone $bean ), $trail, $preserveIDs );
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if ( !$this->cacheTables ) {
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$this->tables = array();
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$this->columns = array();
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}
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return $rs;
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}
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/**
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* Exports a collection of beans recursively.
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* This method will export an array of beans in the first argument to a
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* set of arrays. This can be used to send JSON or XML representations
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* of bean hierarchies to the client.
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*
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* For every bean in the array this method will export:
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*
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* - contents of the bean
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* - all own bean lists (recursively)
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* - all shared beans (but not THEIR own lists)
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*
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* If the second parameter is set to TRUE the parents of the beans in the
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* array will be exported as well (but not THEIR parents).
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*
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* The third parameter can be used to provide a white-list array
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* for filtering. This is an array of strings representing type names,
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* only the type names in the filter list will be exported.
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*
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* The fourth parameter can be used to change the keys of the resulting
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* export arrays. The default mode is 'snake case' but this leaves the
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* keys as-is, because 'snake' is the default case style used by
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* RedBeanPHP in the database. You can set this to 'camel' for
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* camel cased keys or 'dolphin' (same as camelcase but id will be
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* converted to ID instead of Id).
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*
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* @param array|OODBBean $beans beans to be exported
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* @param boolean $parents also export parents
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* @param array $filters only these types (whitelist)
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* @param string $caseStyle case style identifier
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* @param boolean $meta export meta data as well
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*
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* @return array
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*/
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public function exportAll( $beans, $parents = FALSE, $filters = array(), $caseStyle = 'snake', $meta = FALSE)
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{
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$array = array();
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if ( !is_array( $beans ) ) {
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$beans = array( $beans );
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}
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$this->copyMeta = $meta;
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foreach ( $beans as $bean ) {
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$this->setFilters( $filters );
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$duplicate = $this->dup( $bean, array(), TRUE );
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$array[] = $duplicate->export( $meta, $parents, FALSE, $filters );
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}
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if ( $caseStyle === 'camel' ) $array = $this->camelfy( $array );
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if ( $caseStyle === 'dolphin' ) $array = $this->camelfy( $array, TRUE );
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return $array;
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}
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}
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