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<?php defined('SYSPATH') or die('No direct script access.');
/*
* This file is part of open source system FreenetIS
* and it is released under GPLv3 licence.
*
* More info about licence can be found:
* http://www.gnu.org/licenses/gpl-3.0.html
*
* More info about project can be found:
* http://www.freenetis.org/
*
*/

/**
* Controller handles search throught whole system.
*
* @author Michal Kliment
*/
class Search_Controller extends Controller
{
/**
* Array with results of search
*
* @var array
*/
private $results = array();

/**
* Only redirects to method simple
*
* @author Michal Kliment
*/
public function index()
{
url::redirect('search/simple/' . $this->input->get('keyword'));
}

/**
* Base method, makes search.
* Search result is placed to property $results
*
* @author Michal Kliment
* @param string $keyword
*/
private function search($keyword = NULL)
{
$keywords = explode(" ", trim($keyword));

$keys = array();

// finds all possible variations
for ($i = count($keywords); $i > 0; $i--)
$keys = arr::merge($keys, arr::variation($keywords, $i));

$search_model = new Search_Model();

$sums = array();
$counts = array();
$total_counts = array();
$values = array();

// foreach all search rules
foreach (Search_Model::$rules as $rule)
{
// foreach variations
foreach ($keys as $key)
{
if (isset($total_counts[$rule['model']]))
$total_counts[$rule['model']]++;
else
$total_counts[$rule['model']] = 1;

$result = $search_model->{$rule['method']}($key);

foreach ($result as $row)
{
// test how much are texts similar
similar_text(url::title($row->value, " "), url::title($key, " "), $percent);
if (!isset($sums[$rule['model']][$row->id]))
{
$sums[$rule['model']][$row->id] = 0;
$counts[$rule['model']][$row->id] = 0;
$values[$rule['model']][$row->id] = $row;
}
$sums[$rule['model']][$row->id] += $percent;
$counts[$rule['model']][$row->id]++;
}
}
}

$result_sums = array();
$result_counts = array();

// transforms to 1-dimensional array
foreach ($sums as $model => $model_sums)
{
foreach ($model_sums as $id => $sum)
{
$result_sums[] = $sum;
$result_counts[] = $counts[$model][$id] / $total_counts[$model];
$this->results[] = $values[$model][$id];
}
}

// sorts results
array_multisort($result_sums, SORT_DESC, $this->results, SORT_DESC);
}

/**
* Simple searching, uses method search
*
* @author Michal Kliment
* @param string $keyword
* @param integer $limit_results
* @param integer $page_word
* @param integer $page
*/
public function simple(
$keyword = NULL, $limit_results = 20, $page_word = 'page', $page = 1)
{
//$profiler = new Profiler();
// bad parameter
if (!$keyword)
Controller::warning(PARAMETER);

// searching
$this->search($keyword);

$pagination = new Pagination(array
(
'base_url' => Config::get('lang') . '/search/simple/'
. $keyword . '/' . $limit_results,
'uri_segment' => 'page',
'total_items' => count($this->results),
'items_per_page' => $limit_results
));

$from = ($page - 1) * $limit_results;
$to = $page * $limit_results;

if ($to >= count($this->results))
$to = count($this->results) - 1;

$view = new View('main');
$view->keyword = $keyword;
$view->title = $keyword . ' - ' . __('Searching');
$view->content = new View('search/simple');
$view->content->keyword = $keyword;
$view->content->total_items = count($this->results);
$view->content->pagination = $pagination;
$view->content->results = $this->results;
$view->content->from = $from;
$view->content->to = $to;
$view->render(TRUE);

//echo $profiler->render(TRUE);
}

/**
* Ajax searching (for whisper)
*
* @author Michal Kliment
* @param integer $count
*/
public function ajax($count = 100)
{
$this->search($this->input->get('q'));

$counter = 0;

// prints all results
foreach ($this->results as $result)
{
$counter++;
?>
<a href="<?php echo url_lang::base() . $result->link . $result->id ?>" class="whisper_search_result">
<b><?php echo $result->return_value ?></b><br />
<i><?php echo $result->desc ?></i>
</a>
<?php
if ($counter == $count)
break;
}

// no results
if (!$counter)
{
?>
<div class="whisper_search_result"><?php echo __('No items found.') ?></div>
<?php
}
}

}
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