89 lines
2.6 KiB
PHP
89 lines
2.6 KiB
PHP
<?php
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/**
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* Base class to manage active search indexes.
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*/
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class FullTextSearch {
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static protected $all_indexes = null;
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static protected $indexes_by_subclass = array();
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/**
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* Get all the instantiable search indexes (so all the user created indexes, but not the connector or library level
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* abstract indexes). Can optionally be filtered to only return indexes that are subclasses of some class
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*
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* @static
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* @param String $class - Class name to filter indexes by, so that all returned indexes are subclasses of provided class
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* @param bool $rebuild - If true, don't use cached values
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*/
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static function get_indexes($class = null, $rebuild = false) {
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if ($rebuild) { self::$all_indexes = null; self::$indexes_by_subclass = array(); }
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if (!$class) {
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if (self::$all_indexes === null) {
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$classes = ClassInfo::subclassesFor('SearchIndex');
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$concrete = array();
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foreach ($classes as $class) {
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$ref = new ReflectionClass($class);
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if ($ref->isInstantiable()) $concrete[$class] = singleton($class);
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}
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self::$all_indexes = $concrete;
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}
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return self::$all_indexes;
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}
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else {
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if (!isset(self::$indexes_by_subclass[$class])) {
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$all = self::get_indexes();
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$valid = array();
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foreach ($all as $indexclass => $instance) {
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if (ClassInfo::is_subclass_of($indexclass, $class)) $valid[$indexclass] = $instance;
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}
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self::$indexes_by_subclass[$class] = $valid;
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}
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return self::$indexes_by_subclass[$class];
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}
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}
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/**
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* Sometimes, like when in tests, you want to restrain the actual indexes to a subset
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*
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* Call with one argument - an array of class names, index instances or classname => indexinstance pairs (can be mixed).
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* Alternatively call with multiple arguments, each of which is a class name or index instance
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*
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* From then on, fulltext search system will only see those indexes passed in this most recent call.
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*
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* Passing in no arguments resets back to automatic index list
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*/
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static function force_index_list() {
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$indexes = func_get_args();
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// No arguments = back to automatic
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if (!$indexes) {
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self::get_indexes(null, true);
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return;
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}
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// Arguments can be a single array
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if (is_array($indexes[0])) $indexes = $indexes[0];
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// Reset to empty first
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self::$all_indexes = array(); self::$indexes_by_subclass = array();
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// And parse out alternative type combos for arguments and add to allIndexes
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foreach ($indexes as $class => $index) {
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if (is_string($index)) { $class = $index; $index = singleton($class); }
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if (is_numeric($class)) $class = get_class($index);
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self::$all_indexes[$class] = $index;
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}
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}
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}
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