File Source for 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 <dev@alphaframework.org>
* @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'], $_SERVER['REMOTE_ADDR']));
echo '<h2>Display results for "'.$params['q'].'"</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"/> ';
$button = new Button('document.location = \''.$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>.  ';
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'))).'"><<-Previous</a>  ';
else
$html .= '<a href="'.$config->get('sysURL').'search/q/'.$this->query.'/start/'.($this->startPoint-$config->get('sysListPageAmount')).'"><<-Previous</a>  ';
}elseif($this->resultCount > $config->get('sysListPageAmount')){
$html .= '<<-Previous  ';
}
$page = 1;
for ($i = 0; $i < $this->resultCount; $i+=$config->get('sysListPageAmount')) {
if($i != $this->startPoint) {
// handle secure URLs
if(isset($_GET['tk']))
$html .= ' <a href="'.FrontController::generateSecureURL('act=Search&q='.$this->query.'&start='.$i).'">'.$page.'</a> ';
else
$html .= ' <a href="'.$config->get('sysURL').'search/q/'.$this->query.'/start/'.$i.'">'.$page.'</a> ';
}elseif($this->resultCount > $config->get('sysListPageAmount')){
$html .= ' '.$page.' ';
}
$page++;
}
if ($this->resultCount > $end) {
// handle secure URLs
if(isset($_GET['tk']))
$html .= '  <a href="'.FrontController::generateSecureURL('act=Search&q='.$this->query.'&start='.($this->startPoint+$config->get('sysListPageAmount'))).'">Next->></a>';
else
$html .= '  <a href="'.$config->get('sysURL').'search/q/'.$this->query.'/start/'.($this->startPoint+$config->get('sysListPageAmount')).'">Next->></a>';
}elseif($this->resultCount > $config->get('sysListPageAmount')){
$html .= '  Next->>';
}
$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);
}
}
?>

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Source for file Search.php