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simplesearchdriver.class.php
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simplesearchdriver.class.php
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<?php
/**
* SimpleSearch
*
* Copyright 2010-11 by Shaun McCormick <shaun+sisea@modx.com>
*
* This file is part of SimpleSearch, a simple search component for MODx
* Revolution. It is loosely based off of AjaxSearch for MODx Evolution by
* coroico/kylej, minus the ajax.
*
* SimpleSearch is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any later
* version.
*
* SimpleSearch is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along with
* SimpleSearch; if not, write to the Free Software Foundation, Inc., 59 Temple Place,
* Suite 330, Boston, MA 02111-1307 USA
*
* @package simplesearch
*/
/**
* Abstract class for providing custom search driver implementations.
*
* @package simplesearch
*/
abstract class SimpleSearchDriver {
/** @var SimpleSearch A reference to the SimpleSearch class */
public $search;
/** @var modX A reference to the modX class */
public $modx;
/** @var array An array of configuration properties */
public $config;
/** @var array An array of search scores. Optionally used. */
public $searchScores = array();
/** @var array The IDs of the search results */
public $ids = array();
/**
* Construct and return the driver object, and run the initialize method.
* This method may be extended in your driver implementations, but
* SimpleSearchDriver may not be instantiated by itself - it must
* be extended.
*
* @param SimpleSearch $search
* @param array $config
*/
function __construct(SimpleSearch &$search,array $config = array()) {
$this->search =& $search;
$this->modx =& $search->modx;
$this->config = array_merge($config,array());
$this->initialize();
}
/**
* Initialize the driver after loading it.
*
* @abstract
* @return void
*/
abstract public function initialize();
/**
* Run the search against a sanitized query string. Must return an array in this format:
* array(
* 'results' => $arrayOfResourceArrays
* 'total' => $countOfTotalNumberOfResults
* )
*
* Note that the results index must contain an array of arrays (not Resource Objects). *
*
* @abstract
* @param string $string
* @param array $scriptProperties The scriptProperties array from the SimpleSearch snippet
* @return array
*/
abstract public function search($string,array $scriptProperties = array());
/**
* Index a Resource.
*
* @abstract
* @param array $fields
* @return boolean
*/
abstract public function index(array $fields);
/**
* Remove a Resource from the index.
*
* @abstract
* @param string|int $id
* @return boolean
*/
abstract public function removeIndex($id);
/**
* Scores and sorts the results based on 'fieldPotency'
*
* @param array $resources
* @param array $scriptProperties The $scriptProperties array
* @return array Scored and sorted search results
*/
protected function sortResults(array $resources,array $scriptProperties) {
/* Vars */
$searchStyle = $this->modx->getOption('searchStyle', $scriptProperties, 'partial');
$docFields = explode(',', $this->modx->getOption('docFields', $scriptProperties, 'pagetitle,longtitle,alias,description,introtext,content'));
$fieldPotency = array_map('trim', explode(',', $this->modx->getOption('fieldPotency', $scriptProperties,'')));
foreach ($fieldPotency as $key => $field) {
unset($fieldPotency[$key]);
$arr = explode(':', $field);
if (!empty($arr[1])) {
$fieldPotency[$arr[0]] = $arr[1];
}
}
/* Score */
/** @var modResource $resource */
foreach ($resources as $resourceId => $resource) {
foreach ($docFields as $field) {
$potency = (array_key_exists($field, $fieldPotency)) ? (int) $fieldPotency[$field] : 1;
foreach ($this->search->searchArray as $term) {
$queryTerm = preg_quote($term,'/');
$regex = ($searchStyle == 'partial') ? "/{$queryTerm}/i" : "/\b{$queryTerm}\b/i";
$numberOfMatches = preg_match_all($regex, $resource->{$field}, $matches);
if (empty($this->searchScores[$resourceId])) $this->searchScores[$resourceId] = 0;
$this->searchScores[$resourceId] += $numberOfMatches * $potency;
}
}
}
/* Sort */
arsort($this->searchScores);
$list = array();
foreach ($this->searchScores as $resourceId => $score) {
array_push($list, $resources[$resourceId]);
}
return $list;
}
/**
* Process the passed IDs
*
* @param string $ids The IDs to search
* @param string $type The type of id filter
* @param integer $depth The depth in the Resource tree to filter by
* @return string Comma delimited string of the IDs
*/
protected function processIds($ids = '',$type = 'parents',$depth = 10) {
if (!strlen($ids)) return '';
$ids = $this->cleanIds($ids);
switch ($type) {
case 'parents':
$idArray = explode(',', $ids);
$ids = $idArray;
foreach ($idArray as $id) {
$ids = array_merge($ids,$this->modx->getChildIds($id,$depth));
}
$ids = array_unique($ids);
sort($ids);
break;
}
$this->ids = $ids;
return $this->ids;
}
/**
* Clean IDs
*
* @param string $ids Comma delimited string of IDs
* @return string Cleaned comma delimited string of IDs
*/
public function cleanIds($ids) {
$pattern = array (
'`(,)+`', //Multiple commas
'`^(,)`', //Comma on first position
'`(,)$`' //Comma on last position
);
$replace = array (
',',
'',
''
);
return preg_replace($pattern, $replace, $ids);
}
}