| alpha--controller

# Source for file Search.php Documentation is available at Search.php <?php // include the config file if(!isset($config)) { require_once '../util/AlphaConfig.inc'; $config = AlphaConfig::getInstance(); } require_once $config->get('sysRoot').'alpha/controller/AlphaController.inc'; require_once $config->get('sysRoot').'alpha/controller/AlphaControllerInterface.inc'; require_once $config->get('sysRoot').'alpha/model/TagObject.inc'; require_once $config->get('sysRoot').'alpha/view/AlphaView.inc'; require_once $config->get('sysRoot').'alpha/util/LogFile.inc'; /** * * Generic tag-based search engine controller * * @package alpha::controller * @since 1.0 * @author John Collins <john@design-ireland.net> * @version $Id: Search.php 1344 2011-03-17 16:10:20Z johnc $ * @license http://www.opensource.org/licenses/bsd-license.php The BSD License * @copyright Copyright (c) 2011, John Collins (founder of Alpha Framework). * All rights reserved. * * <pre> * Redistribution and use in source and binary forms, with or * without modification, are permitted provided that the * following conditions are met: * * * Redistributions of source code must retain the above * copyright notice, this list of conditions and the * following disclaimer. * * Redistributions in binary form must reproduce the above * copyright notice, this list of conditions and the * following disclaimer in the documentation and/or other * materials provided with the distribution. * * Neither the name of the Alpha Framework nor the names * of its contributors may be used to endorse or promote * products derived from this software without specific * prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * </pre> * */ class Search extends AlphaController implements AlphaControllerInterface { /** * Trace logger * * @var Logger * @since 1.0 */ private static $logger = null; /** * The start number for list pageination * * @var integer * @since 1.0 */ protected $startPoint; /** * The result count from the search * * @var integer * @since 1.0 */ private $resultCount = 0; /** * The search query supplied * * @var string * @since 1.0 */ private $query; /** * constructor to set up the object * * @param string $visibility The name of the rights group that can access this controller. * @since 1.0 */ public function __construct($visibility='Public') { self::$logger = new Logger('Search'); self::$logger->debug('>>__construct(visibility=['.$visibility.'])'); global $config; // ensure that the super class constructor is called, indicating the rights group parent::__construct($visibility); self::$logger->debug('<<__construct'); } /** * Handle GET requests * * @param array $params * @since 1.0 * @throws IllegalArguementException */ public function doGET($params) { self::$logger->debug('>>doGET($params=['.var_export($params, true).'])'); if (isset($params['start']) ? $this->startPoint = $params['start']: $this->startPoint = 0); global $config; if(isset($params['q'])) { $this->query = $params['q']; // replace any %20 on the URL with spaces $params['q'] = str_replace('%20', ' ', $params['q']); $this->setTitle('Search results - '.$params['q']); echo AlphaView::displayPageHead($this); // log the user's search query in a log file $log = new LogFile($config->get('sysRoot').'logs/search.log'); $log->writeLine(array($params['q'], date('Y-m-d H:i:s'), $_SERVER['HTTP_USER_AGENT'], $_SERVER['REMOTE_ADDR'])); echo '<h2>Display results for &quot;'.$params['q'].'&quot;</h2>'; // if a BO name is provided, only search tags on that class, otherwise search all BOs if(isset($params['bo'])) $BOs = array($params['bo']); else $BOs = AlphaDAO::getBOClassNames(); try { foreach($BOs as $BO) { AlphaDAO::loadClassDef($BO); $temp = new $BO; if($temp->isTagged()) { // explode the user's query into a set of tokenized transient TagObjects $queryTags = TagObject::tokenize($params['q'], '', '', false); $matchingTags = array(); // load TagObjects from the DB where content equals the content of one of our transient TagObjects foreach($queryTags as $queryTag) { $tags = $queryTag->loadAllByAttribute('content', $queryTag->get('content')); $matchingTags = array_merge($matchingTags, $tags); } self::$logger->debug('There are ['.count($matchingTags).'] TagObjects matching the query ['.$params['q'].']'); /* * Build an array of BOs for the matching tags from the DB: * array key = BO ID * array value = weight (the amount of tags matching the BO) */ $BOIDs = array(); foreach($matchingTags as $tag) { if($tag->get('taggedClass') == $BO) { if(isset($BOIDs[$tag->get('taggedOID')])) { // increment the weight if the same BO is tagged more than once $weight = intval($BOIDs[$tag->get('taggedOID')]) + 1; $BOIDs[$tag->get('taggedOID')] = $weight; }else{ $BOIDs[$tag->get('taggedOID')] = 1; } self::$logger->debug('Found BO ['.$tag->get('taggedOID').'] has weight ['.$BOIDs[$tag->get('taggedOID')].']'); } } $this->resultCount += count($BOIDs); // sort the BO IDs based on tag frequency weight arsort($BOIDs); // render the list view for each BO $this->renderResultList($BOIDs, $BO, $params['q']); AlphaDAO::disconnect(); } } }catch(Exception $e) { self::$logger->error($e->getMessage()); throw new IllegalArguementException('Error occured while searching for: ['.$params['q'].']'); } }else{ $this->setTitle('Search results'); echo AlphaView::displayPageHead($this); self::$logger->warn('No search query provided!'); } echo AlphaView::displayPageFoot($this); self::$logger->debug('<<doGET'); } /** * Renders the search result list * * @param array $BOIDs * @param string $BO * @param string $query * @since 1.0 */ private function renderResultList($BOIDs, $BO, $query) { global $config; // used to track when our pagination range ends $end = ($this->startPoint+$config->get('sysListPageAmount')); // used to track how many results have been displayed or skipped from the pagination range $displayedCount = 0; foreach(array_keys($BOIDs) as $oid) { try { // if we have reached the end of the pagination range then break out if($displayedCount == $end) break; // if our display count is >= the start but < the end... if($displayedCount >= $this->startPoint) { $temp = new $BO; $temp->load($oid); if($temp instanceof ArticleObject && $temp->get('published') == false){ $this->resultCount--; }else{ $view = AlphaView::getInstance($temp); echo $view->listView(); $tags = $temp->getPropObject('tags')->getRelatedObjects(); if(count($tags) > 0) { echo '<p>Tags: '; $queryTerms = explode(' ', strtolower($query)); foreach($tags as $tag) { echo (in_array($tag->get('content'), $queryTerms) ? '<strong>'.$tag->get('content').' </strong>' : $tag->get('content').' '); } echo '</p>'; } } } $displayedCount++; }catch(BONotFoundException $e) { self::$logger->warn('Orpaned TagObject detected pointing to a non-existant BO of OID ['.$oid.'] and type ['.$BO.'].'); } } } /** * Handle POST requests * * @param array $params * @since 1.0 */ public function doPOST($params) { self::$logger->debug('>>doPOST($params=['.var_export($params, true).'])'); self::$logger->debug('<<doPOST'); } /** * Displays a search form on the top of the page * * @return string * @since 1.0 */ public function after_displayPageHead_callback() { global $config; $html = '<div align="center"><form method="GET" id="search_form" onsubmit="document.location = \''.$config->get('sysURL').'search/q/\'+document.getElementById(\'q\').value; return false;">'; $html .= 'Search for: <input type="text" size="80" name="q" id="q"/>&nbsp;'; $button = new Button('document.location = \''.$config->get('sysURL').'search/q/\'+document.getElementById(\'q\').value', 'Search', 'searchButton'); $html .= $button->render(); $html .= '</form></div>'; return $html; } /** * Method to display the page footer with pageination links * * @return string * @since 1.0 */ public function before_displayPageFoot_callback() { $html = $this->renderPageLinks(); $html .= '<br>'; return $html; } /** * Method for rendering the pagination links * * @return string * @since 1.0 */ protected function renderPageLinks() { global $config; $html = ''; $end = ($this->startPoint+$config->get('sysListPageAmount')); if($end > $this->resultCount) $end = $this->resultCount; if($this->resultCount > 0) $html .= '<p align="center">Displaying '.($this->startPoint+1).' to '.$end.' of <strong>'.$this->resultCount.'</strong>.&nbsp;&nbsp;'; else $html .= AlphaView::displayUpdateMessage('There were no search results for your query.'); if ($this->startPoint > 0) { // handle secure URLs if(isset($_GET['tk'])) $html .= '<a href="'.FrontController::generateSecureURL('act=Search&q='.$this->query.'&start='.($this->startPoint-$config->get('sysListPageAmount'))).'">&lt;&lt;-Previous</a>&nbsp;&nbsp;'; else $html .= '<a href="'.$config->get('sysURL').'search/q/'.$this->query.'/start/'.($this->startPoint-$config->get('sysListPageAmount')).'">&lt;&lt;-Previous</a>&nbsp;&nbsp;'; }elseif($this->resultCount > $config->get('sysListPageAmount')){ $html .= '&lt;&lt;-Previous&nbsp;&nbsp;'; } $page = 1; for ($i = 0; $i < $this->resultCount; $i+=$config->get('sysListPageAmount')) { if($i != $this->startPoint) { // handle secure URLs if(isset($_GET['tk'])) $html .= '&nbsp;<a href="'.FrontController::generateSecureURL('act=Search&q='.$this->query.'&start='.$i).'">'.$page.'</a>&nbsp;'; else $html .= '&nbsp;<a href="'.$config->get('sysURL').'search/q/'.$this->query.'/start/'.$i.'">'.$page.'</a>&nbsp;'; }elseif($this->resultCount > $config->get('sysListPageAmount')){ $html .= '&nbsp;'.$page.'&nbsp;'; } $page++; } if ($this->resultCount > $end) { // handle secure URLs if(isset($_GET['tk'])) $html .= '&nbsp;&nbsp;<a href="'.FrontController::generateSecureURL('act=Search&q='.$this->query.'&start='.($this->startPoint+$config->get('sysListPageAmount'))).'">Next-&gt;&gt;</a>'; else $html .= '&nbsp;&nbsp;<a href="'.$config->get('sysURL').'search/q/'.$this->query.'/start/'.($this->startPoint+$config->get('sysListPageAmount')).'">Next-&gt;&gt;</a>'; }elseif($this->resultCount > $config->get('sysListPageAmount')){ $html .= '&nbsp;&nbsp;Next-&gt;&gt;'; } $html .= '</p>'; return $html; } } // now build the new controller if(basename($_SERVER['PHP_SELF']) == 'Search.php') { $controller = new Search(); if(!empty($_POST)) { $controller->doPOST($_REQUEST); }else{ $controller->doGET($_GET); } } ?> Documentation generated on Thu, 17 Mar 2011 16:44:48 +0000 by phpDocumentor 1.4.3