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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 | <?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) 2008-2011 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; }} |
