202 lines
7.3 KiB
PHP
202 lines
7.3 KiB
PHP
<?php
|
|
/* -*- tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
|
|
/*
|
|
# ***** BEGIN LICENSE BLOCK *****
|
|
# This file is part of InDefero, an open source project management application.
|
|
# Copyright (C) 2008 Céondo Ltd and contributors.
|
|
#
|
|
# InDefero 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.
|
|
#
|
|
# InDefero 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 this program; if not, write to the Free Software
|
|
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
#
|
|
# Based on work under GNU LGPL copyright, from the Pluf Framework
|
|
# Copyright (C) 2001-2007 Loic d'Anterroches and contributors.
|
|
#
|
|
# ***** END LICENSE BLOCK ***** */
|
|
|
|
/**
|
|
* Class implementing the search engine
|
|
*
|
|
* It is a modified version of the Pluf_Search class to be able to
|
|
* cluster the results by project.
|
|
*/
|
|
class IDF_Search extends Pluf_Search
|
|
{
|
|
/**
|
|
* Search.
|
|
*
|
|
* Returns an array of array with model_class, model_id and
|
|
* score. The list is already sorted by score descending.
|
|
*
|
|
* You can then filter the list as you wish with another set of
|
|
* weights.
|
|
*
|
|
* @param string Query string.
|
|
* @param int Project id to limit the results (null)
|
|
* @param string Model class (null)
|
|
* @param string Stemmer class ('Pluf_Text_Stemmer_Porter')
|
|
* @return array Results
|
|
*/
|
|
public static function mySearch($query, $project=null, $model=null, $stemmer='Pluf_Text_Stemmer_Porter')
|
|
{
|
|
$query = Pluf_Text::cleanString(html_entity_decode($query, ENT_QUOTES, 'UTF-8'));
|
|
$words = Pluf_Text::tokenize($query);
|
|
if ($stemmer != null) {
|
|
$words = self::stem($words, $stemmer);
|
|
}
|
|
$words_flat = array();
|
|
foreach ($words as $word=>$c) {
|
|
$words_flat[] = $word;
|
|
}
|
|
$word_ids = self::getWordIds($words_flat);
|
|
if (in_array(null, $word_ids) or count($word_ids) == 0) {
|
|
return array();
|
|
}
|
|
return self::mySearchDocuments($word_ids, $project, $model);
|
|
}
|
|
|
|
/**
|
|
* Search documents.
|
|
*
|
|
* Only the total of the ponderated occurences is used to sort the
|
|
* results.
|
|
*
|
|
* @param array Ids.
|
|
* @param IDF_Project Project to limit the search.
|
|
* @param string Model class to limit the search.
|
|
* @return array Sorted by score, returns model_class, model_id and score.
|
|
*/
|
|
public static function mySearchDocuments($wids, $project, $model)
|
|
{
|
|
$db =& Pluf::db();
|
|
$gocc = new IDF_Search_Occ();
|
|
$where = array();
|
|
foreach ($wids as $id) {
|
|
$where[] = $db->qn('word').'='.(int)$id;
|
|
}
|
|
$prj = (is_null($project)) ? '' : ' AND project='.(int)$project->id;
|
|
$md = (is_null($model)) ? '' : ' AND model_class='.$db->esc($model);
|
|
$select = 'SELECT model_class, model_id, SUM(pondocc) AS score FROM '.$gocc->getSqlTable().' WHERE '.implode(' OR ', $where).$prj.$md.' GROUP BY model_class, model_id HAVING COUNT(*)='.count($wids).' ORDER BY score DESC';
|
|
return $db->select($select);
|
|
}
|
|
|
|
/**
|
|
* Index a document.
|
|
*
|
|
* See Pluf_Search for the disclaimer and informations.
|
|
*
|
|
* @param Pluf_Model Document to index.
|
|
* @param Stemmer used. ('Pluf_Text_Stemmer_Porter')
|
|
* @return array Statistics.
|
|
*/
|
|
public static function index($doc, $stemmer='Pluf_Text_Stemmer_Porter')
|
|
{
|
|
$words = Pluf_Text::tokenize($doc->_toIndex());
|
|
if ($stemmer != null) {
|
|
$words = self::stem($words, $stemmer);
|
|
}
|
|
// Get the total number of words.
|
|
$total = 0.0;
|
|
$words_flat = array();
|
|
foreach ($words as $word => $occ) {
|
|
$total += (float) $occ;
|
|
$words_flat[] = $word;
|
|
}
|
|
// Drop the last indexation.
|
|
$gocc = new IDF_Search_Occ();
|
|
$sql = new Pluf_SQL('DELETE FROM '.$gocc->getSqlTable().' WHERE model_class=%s AND model_id=%s', array($doc->_model, $doc->id));
|
|
$db =& Pluf::db();
|
|
$db->execute($sql->gen());
|
|
// Get the ids for each word.
|
|
$ids = self::getWordIds($words_flat);
|
|
// Insert a new word for the missing words and add the occ.
|
|
$n = count($ids);
|
|
$new_words = 0;
|
|
$done = array();
|
|
for ($i=0;$i<$n;$i++) {
|
|
if ($ids[$i] === null) {
|
|
$word = new Pluf_Search_Word();
|
|
$word->word = $words_flat[$i];
|
|
try {
|
|
$word->create();
|
|
$new_words++;
|
|
$ids[$i] = $word->id;
|
|
} catch (Exception $e) {
|
|
// 100% of the time, the word has been created
|
|
// by another process in the background.
|
|
$r_ids = self::getWordIds(array($word->word));
|
|
if ($r_ids[0]) {
|
|
$ids[$i] = $r_ids[0];
|
|
} else {
|
|
// give up for this word
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
if (isset($done[$ids[$i]])) {
|
|
continue;
|
|
}
|
|
$done[$ids[$i]] = true;
|
|
$occ = new IDF_Search_Occ();
|
|
$occ->word = new Pluf_Search_Word($ids[$i]);
|
|
$occ->model_class = $doc->_model;
|
|
$occ->model_id = $doc->id;
|
|
$occ->project = $doc->get_project();
|
|
$occ->occ = $words[$words_flat[$i]];
|
|
$occ->pondocc = $words[$words_flat[$i]]/$total;
|
|
$occ->create();
|
|
}
|
|
// update the stats
|
|
$sql = new Pluf_SQL('model_class=%s AND model_id=%s',
|
|
array($doc->_model, $doc->id));
|
|
$last_index = Pluf::factory('Pluf_Search_Stats')->getList(array('filter' => $sql->gen()));
|
|
if ($last_index->count() == 0) {
|
|
$stats = new Pluf_Search_Stats();
|
|
$stats->model_class = $doc->_model;
|
|
$stats->model_id = $doc->id;
|
|
$stats->indexations = 1;
|
|
$stats->create();
|
|
} else {
|
|
$last_index[0]->indexations += 1;
|
|
$last_index[0]->update();
|
|
}
|
|
return array('total' => $total, 'new' => $new_words, 'unique'=>$n);
|
|
}
|
|
|
|
/**
|
|
* Remove an item from the index.
|
|
*
|
|
* You must call this function when you delete items wich are
|
|
* indexed. Just add the call:
|
|
*
|
|
* IDF_Search::remove($this);
|
|
*
|
|
* in the preDelete() method of your object.
|
|
*
|
|
* @param mixed Item to be removed
|
|
* @return bool Success
|
|
*/
|
|
public static function remove($item)
|
|
{
|
|
if ($item->id > 0) {
|
|
$sql = new Pluf_SQL('model_id=%s AND model_class=%s',
|
|
array($item->id, $item->_model));
|
|
$items = Pluf::factory('IDF_Search_Occ')->getList(array('filter'=>$sql->gen()));
|
|
foreach ($items as $tl) {
|
|
$tl->delete();
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
} |