silverstripe-framework/search/SearchForm.php

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<?php
/**
* Standard basic search form which conducts a fulltext search on all {@link SiteTree}
* objects.
*
* If multilingual content is enabled through the {@link Translatable} extension,
* only pages the currently set language on the holder for this searchform are found.
* The language is set through a hidden field in the form, which is prepoluated
* with {@link Translatable::get_current_locale()} when then form is constructed.
*
* @see Use ModelController and SearchContext for a more generic search implementation based around DataObject
* @package sapphire
* @subpackage search
*/
class SearchForm extends Form {
/**
* @var int $pageLength How many results are shown per page.
* Relies on pagination being implemented in the search results template.
*/
protected $pageLength = 10;
/**
* Classes to search
*/
protected $classesToSearch = array("SiteTree", "File");
/**
*
* @param Controller $controller
* @param string $name The name of the form (used in URL addressing)
* @param FieldSet $fields Optional, defaults to a single field named "Search". Search logic needs to be customized
* if fields are added to the form.
* @param FieldSet $actions Optional, defaults to a single field named "Go".
*/
function __construct($controller, $name, $fields = null, $actions = null) {
if(!$fields) {
$fields = new FieldSet(
new TextField('Search', _t('SearchForm.SEARCH', 'Search')
));
}
if(singleton('SiteTree')->hasExtension('Translatable')) {
$fields->push(new HiddenField('locale', 'locale', Translatable::get_current_locale()));
}
if(!$actions) {
$actions = new FieldSet(
new FormAction("getResults", _t('SearchForm.GO', 'Go'))
);
}
parent::__construct($controller, $name, $fields, $actions);
$this->setFormMethod('get');
$this->disableSecurityToken();
}
public function forTemplate() {
return $this->renderWith(array(
'SearchForm',
'Form'
));
}
/**
* Set the classes to search.
* Currently you can only choose from "SiteTree" and "File", but a future version might improve this.
*/
function classesToSearch($classes) {
$illegalClasses = array_diff($classes, array('SiteTree', 'File'));
if($illegalClasses) {
user_error("SearchForm::classesToSearch() passed illegal classes '" . implode("', '", $illegalClasses) . "'. At this stage, only File and SiteTree are allowed", E_USER_WARNING);
}
$legalClasses = array_intersect($classes, array('SiteTree', 'File'));
$this->classesToSearch = $legalClasses;
}
/**
* Return dataObjectSet of the results using $_REQUEST to get info from form.
* Wraps around {@link searchEngine()}.
*
* @param int $pageLength DEPRECATED 2.3 Use SearchForm->pageLength
* @param array $data Request data as an associative array. Should contain at least a key 'Search' with all searched keywords.
* @return DataObjectSet
*/
public function getResults($pageLength = null, $data = null){
// legacy usage: $data was defaulting to $_REQUEST, parameter not passed in doc.silverstripe.com tutorials
if(!isset($data)) $data = $_REQUEST;
// set language (if present)
if(singleton('SiteTree')->hasExtension('Translatable') && isset($data['locale'])) {
$origLocale = Translatable::get_current_locale();
Translatable::set_current_locale($data['locale']);
}
$keywords = $data['Search'];
$andProcessor = create_function('$matches','
return " +" . $matches[2] . " +" . $matches[4] . " ";
');
$notProcessor = create_function('$matches', '
return " -" . $matches[3];
');
$keywords = preg_replace_callback('/()("[^()"]+")( and )("[^"()]+")()/i', $andProcessor, $keywords);
$keywords = preg_replace_callback('/(^| )([^() ]+)( and )([^ ()]+)( |$)/i', $andProcessor, $keywords);
$keywords = preg_replace_callback('/(^| )(not )("[^"()]+")/i', $notProcessor, $keywords);
$keywords = preg_replace_callback('/(^| )(not )([^() ]+)( |$)/i', $notProcessor, $keywords);
$keywords = $this->addStarsToKeywords($keywords);
if(strpos($keywords, '"') !== false || strpos($keywords, '+') !== false || strpos($keywords, '-') !== false || strpos($keywords, '*') !== false) {
$results = $this->searchEngine($keywords, $pageLength, "Relevance DESC", "", true);
} else {
$results = $this->searchEngine($keywords, $pageLength);
}
// filter by permission
if($results) foreach($results as $result) {
if(!$result->canView()) $results->remove($result);
}
// reset locale
if(singleton('SiteTree')->hasExtension('Translatable') && isset($data['locale'])) {
Translatable::set_current_locale($origLocale);
}
return $results;
}
protected function addStarsToKeywords($keywords) {
if(!trim($keywords)) return "";
// Add * to each keyword
$splitWords = split(" +" , trim($keywords));
while(list($i,$word) = each($splitWords)) {
if($word[0] == '"') {
while(list($i,$subword) = each($splitWords)) {
$word .= ' ' . $subword;
if(substr($subword,-1) == '"') break;
}
} else {
$word .= '*';
}
$newWords[] = $word;
}
return implode(" ", $newWords);
}
/**
* The core search engine, used by this class and its subclasses to do fun stuff.
* Searches both SiteTree and File.
*
* @param string $keywords Keywords as a string.
*/
public function searchEngine($keywords, $pageLength = null, $sortBy = "Relevance DESC", $extraFilter = "", $booleanSearch = false, $alternativeFileFilter = "", $invertedMatch = false) {
if(!$pageLength) $pageLength = $this->pageLength;
$fileFilter = '';
$keywords = Convert::raw2sql($keywords);
$htmlEntityKeywords = htmlentities($keywords);
$extraFilters = array('SiteTree' => '', 'File' => '');
if($booleanSearch) $boolean = "IN BOOLEAN MODE";
if($extraFilter) {
$extraFilters['SiteTree'] = " AND $extraFilter";
if($alternativeFileFilter) $extraFilters['File'] = " AND $alternativeFileFilter";
else $extraFilters['File'] = $extraFilters['SiteTree'];
}
// Always ensure that only pages with ShowInSearch = 1 can be searched
$extraFilters['SiteTree'] .= " AND ShowInSearch <> 0";
$start = isset($_GET['start']) ? (int)$_GET['start'] : 0;
$limit = $start . ", " . (int) $pageLength;
$notMatch = $invertedMatch ? "NOT " : "";
if($keywords) {
$match['SiteTree'] = "
MATCH (Title, MenuTitle, Content, MetaTitle, MetaDescription, MetaKeywords) AGAINST ('$keywords' $boolean)
+ MATCH (Title, MenuTitle, Content, MetaTitle, MetaDescription, MetaKeywords) AGAINST ('$htmlEntityKeywords' $boolean)
";
$match['File'] = "MATCH (Filename, Title, Content) AGAINST ('$keywords' $boolean) AND ClassName = 'File'";
// We make the relevance search by converting a boolean mode search into a normal one
$relevanceKeywords = str_replace(array('*','+','-'),'',$keywords);
$htmlEntityRelevanceKeywords = str_replace(array('*','+','-'),'',$htmlEntityKeywords);
$relevance['SiteTree'] = "MATCH (Title, MenuTitle, Content, MetaTitle, MetaDescription, MetaKeywords) AGAINST ('$relevanceKeywords') + MATCH (Title, MenuTitle, Content, MetaTitle, MetaDescription, MetaKeywords) AGAINST ('$htmlEntityRelevanceKeywords')";
$relevance['File'] = "MATCH (Filename, Title, Content) AGAINST ('$relevanceKeywords')";
} else {
$relevance['SiteTree'] = $relevance['File'] = 1;
$match['SiteTree'] = $match['File'] = "1 = 1";
}
// Generate initial queries and base table names
$baseClasses = array('SiteTree' => '', 'File' => '');
foreach($this->classesToSearch as $class) {
$queries[$class] = singleton($class)->extendedSQL($notMatch . $match[$class] . $extraFilters[$class], "");
$baseClasses[$class] = reset($queries[$class]->from);
}
// Make column selection lists
$select = array(
'SiteTree' => array("ClassName","$baseClasses[SiteTree].ID","ParentID","Title","URLSegment","Content","LastEdited","Created","_utf8'' AS Filename", "_utf8'' AS Name", "$relevance[SiteTree] AS Relevance", "CanViewType"),
'File' => array("ClassName","$baseClasses[File].ID","_utf8'' AS ParentID","Title","_utf8'' AS URLSegment","Content","LastEdited","Created","Filename","Name","$relevance[File] AS Relevance","NULL AS CanViewType"),
);
// Process queries
foreach($this->classesToSearch as $class) {
// There's no need to do all that joining
$queries[$class]->from = array(str_replace('`','',$baseClasses[$class]) => $baseClasses[$class]);
$queries[$class]->select = $select[$class];
$queries[$class]->orderby = null;
}
// Combine queries
$querySQLs = array();
$totalCount = 0;
foreach($queries as $query) {
$querySQLs[] = $query->sql();
$totalCount += $query->unlimitedRowCount();
}
$fullQuery = implode(" UNION ", $querySQLs) . " ORDER BY $sortBy LIMIT $limit";
// Get records
$records = DB::query($fullQuery);
foreach($records as $record)
$objects[] = new $record['ClassName']($record);
if(isset($objects)) $doSet = new DataObjectSet($objects);
else $doSet = new DataObjectSet();
$doSet->setPageLimits($start, $pageLength, $totalCount);
return $doSet;
}
/**
* Get the search query for display in a "You searched for ..." sentence.
*
* @param array $data
* @return string
*/
public function getSearchQuery($data = null) {
// legacy usage: $data was defaulting to $_REQUEST, parameter not passed in doc.silverstripe.com tutorials
if(!isset($data)) $data = $_REQUEST;
return Convert::raw2xml($data['Search']);
}
/**
* Set the maximum number of records shown on each page.
*
* @param int $length
*/
public function setPageLength($length) {
$this->pageLength = $length;
}
/**
* @return int
*/
public function getPageLength() {
return $this->pageLength;
}
}
?>