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<?php |
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/** |
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* @package midcom.helper.reflector |
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* @author The Midgard Project, http://www.midgard-project.org |
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* @copyright The Midgard Project, http://www.midgard-project.org |
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* @license http://www.gnu.org/licenses/lgpl.html GNU Lesser General Public License |
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*/ |
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/** |
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* The Grand Unified Reflector, copying helper class |
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* |
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* @package midcom.helper.reflector |
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*/ |
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class midcom_helper_reflector_copy |
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{ |
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use midcom_baseclasses_components_base; |
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public ?midcom_core_dbaobject $target = null; |
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/** |
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* List of GUIDs of objects that shall not be copied |
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*/ |
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public array $exclude = []; |
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/** |
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* Switch for attachments |
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*/ |
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public bool $attachments = true; |
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/** |
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* Switch for parameters |
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*/ |
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public bool $parameters = true; |
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/** |
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* Switch for privileges |
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*/ |
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public bool $privileges = true; |
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/** |
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* Switch for metadata |
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*/ |
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public bool $metadata = true; |
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/** |
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* Copy the whole tree |
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*/ |
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public bool $recursive = true; |
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/** |
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* Metadata fields that shall be copied |
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*/ |
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public array $copy_metadata_fields = [ |
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'owner', |
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'authors', |
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'schedulestart', |
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'scheduleend', |
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'navnoentry', |
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'hidden', |
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'score', |
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]; |
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/** |
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* Encountered errors |
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*/ |
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public array $errors = []; |
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/** |
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* Get the parent property for overriding it |
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*/ |
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public static function get_parent_property(midcom_core_dbaobject $object) : ?string |
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{ |
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return midgard_object_class::get_property_parent($object->__mgdschema_class_name__) |
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?? midgard_object_class::get_property_up($object->__mgdschema_class_name__); |
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} |
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/** |
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* Copy an object tree. Both source and parent may be liberally filled. Source can be either |
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* MgdSchema or MidCOM db object of the object and parent can be |
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* |
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* - MgdSchema object |
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* - MidCOM db object |
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* - left empty to copy as a parentless object |
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* |
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* This method is self-aware and will refuse to perform any infinite loops (e.g. to copy |
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* itself to its descendant, copying itself again and again and again). |
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* |
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* Eventually this method will return the first root object that was created, i.e. the root |
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* of the new tree. |
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*/ |
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public function copy_tree(midcom_core_dbaobject $source, ?midcom_core_dbaobject $parent) : ?midcom_core_dbaobject |
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{ |
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// Copy the root object |
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$root = $this->copy_object($source, $parent); |
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if (!$root) { |
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$this->errors[] = sprintf($this->_l10n->get('failed to copy object %s'), $source->guid); |
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return null; |
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} |
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// Add the newly copied object to the exclusion list to prevent infinite loops |
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$this->exclude[] = $source->guid; |
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// Loop through the children and copy them to their corresponding parents |
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foreach (midcom_helper_reflector_tree::get_child_objects($source) as $children) { |
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// Get the children of each type |
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foreach ($children as $child) { |
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// Skip the excluded child |
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if (!in_array($child->guid, $this->exclude)) { |
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$this->copy_tree($child, $root); |
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} |
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} |
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} |
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// Return the newly created root object |
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return $root; |
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} |
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/** |
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* Copy an object |
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*/ |
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public function copy_object(midcom_core_dbaobject $source, ?midcom_core_dbaobject $parent, array $defaults = []) : ?midcom_core_dbaobject |
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{ |
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// Duplicate the object |
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$class_name = $source::class; |
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$target = new $class_name(); |
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// Copy the object properties |
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foreach (midcom_helper_reflector::get_object_fieldnames($source) as $property) { |
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// Skip certain fields |
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if (!preg_match('/^(_|metadata|guid|id)/', $property)) { |
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$target->$property = $source->$property; |
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} |
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} |
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// Override with defaults |
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foreach ($defaults as $name => $value) { |
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$target->$name = $value; |
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} |
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if ( $this->recursive |
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&& $parent_property = self::get_parent_property($source)) { |
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// Copy the link to parent |
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if (!empty($parent->guid)) { |
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// @TODO: Is there a sure way to determine if the parent is |
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// GUID or is it ID? If so, please change it here. |
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$parent_key = (is_string($source->$parent_property)) ? 'guid' : 'id'; |
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$target->$parent_property = $parent->$parent_key; |
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} else { |
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$target->$parent_property = (is_string($source->$parent_property)) ? '' : 0; |
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} |
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} |
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if ($name_property = midcom_helper_reflector::get_name_property($target)) { |
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$resolver = new midcom_helper_reflector_nameresolver($target); |
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$target->$name_property = $resolver->generate_unique_name(); |
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} |
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// This needs to be here, otherwise it will be overridden |
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$target->allow_name_catenate = true; |
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if (!$target->create()) { |
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$this->errors[] = $this->_l10n->get('failed to create object: ' . midcom_connection::get_error_string()); |
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return null; |
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} |
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foreach (['parameters', 'metadata', 'attachments', 'privileges'] as $type) { |
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if (!$this->_copy_data($type, $source, $target)) { |
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return null; |
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} |
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} |
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return $target; |
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} |
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/** |
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* Copy object data |
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*/ |
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private function _copy_data(string $type, midcom_core_dbaobject $source, midcom_core_dbaobject $target) : bool |
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{ |
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if ($this->$type) { |
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$method = 'copy_' . $type; |
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if (!$this->$method($source, $target)) { |
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$this->errors[] = $this->_l10n->get('failed to copy ' . $type); |
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return false; |
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} |
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} |
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return true; |
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} |
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/** |
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* Copy parameters for the object |
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*/ |
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public function copy_parameters(midcom_core_dbaobject $source, midcom_core_dbaobject $target) : bool |
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{ |
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// Loop through the parameters |
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foreach ($source->list_parameters() as $domain => $parameters) { |
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foreach ($parameters as $name => $value) { |
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if (!$target->set_parameter($domain, $name, $value)) { |
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$this->errors[] = sprintf($this->_l10n->get('failed to copy parameters from %s to %s'), $source->guid, $target->guid); |
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return false; |
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} |
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} |
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} |
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return true; |
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} |
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/** |
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* Copy metadata for the object |
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*/ |
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public function copy_metadata(midcom_core_dbaobject $source, midcom_core_dbaobject $target) : bool |
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{ |
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foreach ($this->copy_metadata_fields as $property) { |
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$target->metadata->$property = $source->metadata->$property; |
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} |
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if ($target->update()) { |
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return true; |
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} |
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$this->errors[] = sprintf($this->_l10n->get('failed to copy metadata from %s to %s'), $source->guid, $target->guid); |
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return false; |
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} |
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/** |
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* Copy attachments |
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*/ |
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public function copy_attachments(midcom_core_dbaobject $source, midcom_core_dbaobject $target) : bool |
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{ |
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$defaults = [ |
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'parentguid' => $target->guid, |
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]; |
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foreach ($source->list_attachments() as $attachment) { |
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$this->copy_object($attachment, $target, $defaults); |
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} |
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return true; |
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} |
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/** |
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* Copy privileges |
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*/ |
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public function copy_privileges(midcom_core_dbaobject $source, midcom_core_dbaobject $target) : bool |
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{ |
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$qb = midcom_core_privilege_db::new_query_builder(); |
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$qb->add_constraint('objectguid', '=', $source->guid); |
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foreach ($qb->execute() as $privilege) { |
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$new = new midcom_core_privilege_db(); |
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$new->objectguid = $target->guid; |
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$new->classname = $privilege->classname; |
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$new->privilegename = $privilege->privilegename; |
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$new->value = $privilege->value; |
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$new->assignee = $privilege->assignee; |
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if (!$new->create()) { |
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$this->errors[] = 'privilege creation failed'; |
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return false; |
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} |
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} |
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return true; |
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} |
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/** |
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* Dispatches the copy command according to the attributes set |
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*/ |
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public function execute(midcom_core_dbaobject $source) : ?midcom_core_dbaobject |
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{ |
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if ($this->recursive) { |
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// Disable execution timeout and memory limit, this can be very intensive |
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midcom::get()->disable_limits(); |
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$new_root_object = $this->copy_tree($source, $this->target); |
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} else { |
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$new_root_object = $this->copy_object($source, $this->target); |
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} |
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if (empty($new_root_object->guid)) { |
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$this->errors[] = $this->_l10n->get('failed to get the new root object'); |
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return null; |
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} |
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return $new_root_object; |
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} |
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} |
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