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<?php |
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namespace SilverStripe\FullTextSearch\Search; |
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use SilverStripe\Core\ClassInfo; |
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use SilverStripe\ORM\DataObject; |
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/** |
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* Some additional introspection tools that are used often by the fulltext search code |
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*/ |
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class SearchIntrospection |
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{ |
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protected static $ancestry = array(); |
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/** |
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* Check if class is subclass of (a) the class in $of, or (b) any of the classes in the array $of |
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* @static |
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* @param $class |
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* @param $of |
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* @return bool |
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*/ |
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public static function is_subclass_of($class, $of) |
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{ |
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$ancestry = isset(self::$ancestry[$class]) ? self::$ancestry[$class] : (self::$ancestry[$class] = ClassInfo::ancestry($class)); |
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return is_array($of) ? (bool)array_intersect($of, $ancestry) : array_key_exists($of, $ancestry); |
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} |
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protected static $hierarchy = array(); |
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/** |
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* Get all the classes involved in a DataObject hierarchy - both super and optionally subclasses |
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* |
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* @static |
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* @param string $class - The class to query |
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* @param bool $includeSubclasses - True to return subclasses as well as super classes |
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* @param bool $dataOnly - True to only return classes that have tables |
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* @return array - Integer keys, String values as classes sorted by depth (most super first) |
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*/ |
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public static function hierarchy($class, $includeSubclasses = true, $dataOnly = false) |
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{ |
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$key = "$class!" . ($includeSubclasses ? 'sc' : 'an') . '!' . ($dataOnly ? 'do' : 'al'); |
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if (!isset(self::$hierarchy[$key])) { |
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$classes = array_values(ClassInfo::ancestry($class)); |
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if ($includeSubclasses) { |
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$classes = array_unique(array_merge($classes, array_values(ClassInfo::subclassesFor($class)))); |
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} |
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$idx = array_search(DataObject::class, $classes); |
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if ($idx !== false) { |
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array_splice($classes, 0, $idx+1); |
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} |
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if ($dataOnly) { |
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foreach ($classes as $i => $class) { |
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if (!DataObject::getSchema()->classHasTable($class)) { |
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unset($classes[$i]); |
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} |
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} |
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} |
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self::$hierarchy[$key] = $classes; |
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} |
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return self::$hierarchy[$key]; |
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} |
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/** |
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* Add classes to list, keeping only the parent when parent & child are both in list after add |
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*/ |
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public static function add_unique_by_ancestor(&$list, $class) |
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{ |
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// If class already has parent in list, just ignore |
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if (self::is_subclass_of($class, $list)) { |
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return; |
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} |
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// Strip out any subclasses of $class already in the list |
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$children = ClassInfo::subclassesFor($class); |
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$list = array_diff($list, $children); |
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// Then add the class in |
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$list[] = $class; |
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} |
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/** |
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* Does this class, it's parent (or optionally one of it's children) have the passed extension attached? |
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*/ |
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public static function has_extension($class, $extension, $includeSubclasses = true) |
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{ |
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foreach (self::hierarchy($class, $includeSubclasses) as $relatedclass) { |
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if ($relatedclass::has_extension($extension)) { |
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return true; |
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} |
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} |
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return false; |
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} |
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} |
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silverstripe /
silverstripe-fulltextsearch
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