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<?php |
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/** |
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* @package midcom.helper.reflector |
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* @author CONTENT CONTROL http://www.contentcontrol-berlin.de/ |
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* @copyright CONTENT CONTROL http://www.contentcontrol-berlin.de/ |
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* @license http://www.gnu.org/licenses/gpl.html GNU General Public License |
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*/ |
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/** |
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* Helper class for object name handling |
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* |
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* @package midcom.helper.reflector |
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*/ |
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class midcom_helper_reflector_nameresolver |
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{ |
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/** |
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* The object we're working with |
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* |
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* @var midcom_core_dbaobject |
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*/ |
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private $_object; |
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public function __construct($object) |
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{ |
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$this->_object = $object; |
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} |
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/** |
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* Resolves the "name" of given object |
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* |
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* @param string $name_property property to use as "name", if left to default (null), will be reflected |
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* @return string value of name property or null on failure |
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*/ |
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public function get_object_name(string $name_property = null) : ?string |
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{ |
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if ($name_property === null) { |
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$name_property = midcom_helper_reflector::get_name_property($this->_object); |
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} |
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if ( empty($name_property) |
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|| !midcom_helper_reflector::get($this->_object)->property_exists($name_property)) { |
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// Could not resolve valid property |
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1 |
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return null; |
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} |
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return $this->_object->{$name_property}; |
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} |
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/** |
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* Checks for "clean" URL name |
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* |
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* @see http://trac.midgard-project.org/ticket/809 |
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* @param string $name_property property to use as "name", if left to default (null), will be reflected |
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*/ |
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1 |
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public function name_is_clean(string $name_property = null) : bool |
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{ |
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if ($name_copy = $this->get_object_name($name_property)) { |
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return $name_copy === midcom_helper_misc::urlize($name_copy); |
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} |
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// empty name is not "clean" |
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return false; |
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} |
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/** |
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* Checks for URL-safe name |
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* |
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* @see http://trac.midgard-project.org/ticket/809 |
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* @param string $name_property property to use as "name", if left to default (null), will be reflected |
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*/ |
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public function name_is_safe(string $name_property = null) : bool |
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{ |
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if ($name_copy = $this->get_object_name($name_property)) { |
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return $name_copy === rawurlencode($name_copy); |
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} |
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// empty name is not url-safe |
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return false; |
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} |
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/** |
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* Check that none of given object's siblings have same name. |
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*/ |
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public function name_is_unique() : bool |
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{ |
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// Get current name and sanity-check |
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$name = $this->get_object_name(); |
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if (empty($name)) { |
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// We do not check for empty names, and do not consider them to be unique |
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return false; |
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} |
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// Start the magic |
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midcom::get()->auth->request_sudo('midcom.helper.reflector'); |
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$parent = $this->_object->get_parent(); |
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$stat = $this->check_sibling_classes($name, $this->get_sibling_classes($parent), $parent); |
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midcom::get()->auth->drop_sudo(); |
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return $stat; |
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} |
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private function get_sibling_classes($parent = null) : array |
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{ |
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if (!empty($parent->guid)) { |
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// We have parent, check siblings |
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$parent_resolver = new midcom_helper_reflector_tree($parent); |
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$sibling_classes = $parent_resolver->get_child_classes(); |
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if (!in_array('midgard_attachment', $sibling_classes)) { |
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$sibling_classes[] = 'midgard_attachment'; |
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} |
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return $sibling_classes; |
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} |
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// No parent, we might be a root level class |
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$root_classes = midcom_helper_reflector_tree::get_root_classes(); |
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foreach ($root_classes as $classname) { |
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if (midcom::get()->dbfactory->is_a($this->_object, $classname)) { |
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return $root_classes; |
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} |
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} |
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debug_add("Object " . get_class($this->_object) . " #" . $this->_object->id . " has no valid parent but is not listed in the root classes", MIDCOM_LOG_ERROR); |
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return []; |
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} |
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private function check_sibling_classes(string $name, array $schema_types, $parent = null) : bool |
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{ |
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foreach ($schema_types as $schema_type) { |
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$qb = $this->get_sibling_qb($schema_type, $parent); |
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if (!$qb) { |
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continue; |
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} |
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$child_name_property = midcom_helper_reflector::get_name_property(new $schema_type); |
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$qb->add_constraint($child_name_property, '=', $name); |
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if ($qb->count()) { |
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debug_add("Name clash in sibling class {$schema_type} for " . get_class($this->_object) . " #{$this->_object->id} (path '" . midcom_helper_reflector_tree::resolve_path($this->_object, '/') . "')" ); |
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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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* Generates an unique name for the given object. |
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* |
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* 1st IF name is empty, we generate one from title (if title is empty too, we return null) |
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* Then we check if it's unique, if not we add an incrementing |
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* number to it (before this we make some educated guesses about a |
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* good starting value) |
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* |
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* @param string $title_property Property of the object to use at title, if null will be reflected (see midcom_helper_reflector::get_object_title()) |
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* @param string $extension The file extension, when working with attachments |
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*/ |
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public function generate_unique_name(string $title_property = null, string $extension = '') : ?string |
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{ |
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// Get current name and sanity-check |
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$original_name = $this->get_object_name(); |
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if ($original_name === null) { |
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// Fatal error with name resolution |
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debug_add("Object " . get_class($this->_object) . " #{$this->_object->id} returned critical failure for name resolution, aborting", MIDCOM_LOG_WARN); |
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return null; |
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} |
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// We need the name of the "name" property later |
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$name_prop = midcom_helper_reflector::get_name_property($this->_object); |
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if (!empty($original_name)) { |
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$current_name = $original_name; |
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} else { |
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// Empty name, try to generate from title |
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$title_copy = midcom_helper_reflector::get_object_title($this->_object, $title_property); |
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if ($title_copy === null) { |
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// Fatal error with title resolution |
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debug_add("Object " . get_class($this->_object) . " #{$this->_object->id} returned critical failure for title resolution when name was empty, aborting", MIDCOM_LOG_WARN); |
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return null; |
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} |
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if (empty($title_copy)) { |
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debug_add("Object " . get_class($this->_object) . " #{$this->_object->id} has empty name and title, aborting", MIDCOM_LOG_WARN); |
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return null; |
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} |
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$current_name = midcom_helper_misc::urlize($title_copy); |
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unset($title_copy); |
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} |
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// incrementer, the number to add as suffix and the base name. see _generate_unique_name_resolve_i() |
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[$i, $base_name] = $this->_generate_unique_name_resolve_i($current_name, $extension); |
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$this->_object->{$name_prop} = $base_name; |
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// decrementer, do not try more than this many times (the incrementer can raise above this if we start high enough. |
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$d = 100; |
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// The loop, usually we *should* hit gold in first try |
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do { |
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if ($i > 1) { |
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// Start suffixes from -002 |
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$this->_object->{$name_prop} = $base_name . sprintf('-%03d', $i) . $extension; |
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} |
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// Handle the decrementer |
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--$d; |
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if ($d < 1) { |
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// Decrementer underflowed |
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debug_add("Maximum number of tries exceeded, current name was: " . $this->_object->{$name_prop}, MIDCOM_LOG_ERROR); |
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$this->_object->{$name_prop} = $original_name; |
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return null; |
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} |
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// and the incrementer |
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++$i; |
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} while (!$this->name_is_unique()); |
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// Get a copy of the current, usable name |
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$ret = (string)$this->_object->{$name_prop}; |
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// Restore the original name |
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$this->_object->{$name_prop} = $original_name; |
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return $ret; |
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} |
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private function get_sibling_qb(string $schema_type, $parent = null) |
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{ |
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$child_name_property = midcom_helper_reflector::get_name_property(new $schema_type); |
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if (empty($child_name_property)) { |
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// This sibling class does not use names |
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return false; |
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} |
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if ($parent === null) { |
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$qb = midcom_helper_reflector_tree::get($schema_type)->_root_objects_qb(); |
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} else { |
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$resolver = midcom_helper_reflector_tree::get($schema_type); |
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$qb = $resolver->_child_objects_type_qb($schema_type, $parent, false); |
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} |
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if (!$qb) { |
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return false; |
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} |
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// Do not include current object in results, this is the easiest way |
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if (!empty($this->_object->guid)) { |
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$qb->add_constraint('guid', '<>', $this->_object->guid); |
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} |
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$qb->add_order($child_name_property, 'DESC'); |
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// One result should be enough |
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$qb->set_limit(1); |
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return $qb; |
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239
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} |
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private function _parse_filename(string $name, string $extension, int $default = 0) : array |
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{ |
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if (preg_match('/(.*?)-([0-9]{3,})' . $extension . '$/', $name, $name_matches)) { |
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// Name already has i and base parts, split them. |
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return [(int) $name_matches[2], (string) $name_matches[1]]; |
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} |
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// Defaults |
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return [$default, $name]; |
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} |
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/** |
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252
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* Resolve the base value for the incrementing suffix and for the name. |
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* |
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254
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* @see midcom_helper_reflector_nameresolver::generate_unique_name() |
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255
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* @param string $current_name the "current name" of the object (might not be the actual name value see the title logic in generate_unique_name()) |
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256
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* @param string $extension The file extension, when working with attachments |
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257
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* @return array first key is the resolved $i second is the $base_name, which is $current_name without numeric suffix |
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*/ |
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259
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8 |
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private function _generate_unique_name_resolve_i(string $current_name, string $extension) : array |
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{ |
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261
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8 |
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[$i, $base_name] = $this->_parse_filename($current_name, $extension, 1); |
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263
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// Look for siblings with similar names and see if they have higher i. |
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8 |
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midcom::get()->auth->request_sudo('midcom.helper.reflector'); |
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265
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8 |
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$parent = $this->_object->get_parent(); |
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266
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8 |
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foreach ($this->get_sibling_classes($parent) as $schema_type) { |
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7 |
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if ($qb = $this->get_sibling_qb($schema_type, $parent)) { |
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268
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7 |
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$child_name_property = midcom_helper_reflector::get_name_property(new $schema_type); |
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269
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270
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7 |
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$qb->add_constraint($child_name_property, 'LIKE', "{$base_name}-%" . $extension); |
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271
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7 |
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if ($siblings = $qb->execute()) { |
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272
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$sibling = $siblings[0]; |
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273
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$sibling_name = $sibling->{$child_name_property}; |
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275
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$sibling_i = $this->_parse_filename($sibling_name, $extension)[0]; |
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276
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if ($sibling_i >= $i) { |
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277
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$i = $sibling_i + 1; |
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} |
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} |
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} |
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281
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} |
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282
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8 |
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midcom::get()->auth->drop_sudo(); |
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283
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284
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8 |
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return [$i, $base_name]; |
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285
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} |
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286
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} |
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flack /
openpsa
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