3 * SPDX-License-Identifier: GPL-2.0-only
5 * This file is part of Nominatim. (https://nominatim.org)
7 * Copyright (C) 2022 by the Nominatim developer community.
8 * For a full list of authors see the git log.
13 require_once(CONST_LibDir.'/SimpleWordList.php');
19 private $oNormalizer = null;
21 public function __construct(&$oDB)
24 $this->oNormalizer = \Transliterator::createFromRules(CONST_Term_Normalization_Rules);
27 public function checkStatus()
29 $sStandardWord = $this->oDB->getOne("SELECT make_standard_name('a')");
30 if ($sStandardWord === false) {
31 throw new \Exception('Module failed', 701);
34 if ($sStandardWord != 'a') {
35 throw new \Exception('Module call failed', 702);
38 $sSQL = "SELECT word_id FROM word WHERE word_token IN (' a')";
39 $iWordID = $this->oDB->getOne($sSQL);
40 if ($iWordID === false) {
41 throw new \Exception('Query failed', 703);
44 throw new \Exception('No value', 704);
49 public function normalizeString($sTerm)
51 if ($this->oNormalizer === null) {
55 return $this->oNormalizer->transliterate($sTerm);
59 public function mostFrequentWords($iNum)
61 $sSQL = 'SELECT word FROM word WHERE word is not null ';
62 $sSQL .= 'ORDER BY search_name_count DESC LIMIT '.$iNum;
63 return $this->oDB->getCol($sSQL);
67 public function tokensForSpecialTerm($sTerm)
71 $sSQL = 'SELECT word_id, class, type FROM word ';
72 $sSQL .= ' WHERE word_token = \' \' || make_standard_name(:term)';
73 $sSQL .= ' AND class is not null AND class not in (\'place\')';
75 Debug::printVar('Term', $sTerm);
76 Debug::printSQL($sSQL);
77 $aSearchWords = $this->oDB->getAll($sSQL, array(':term' => $sTerm));
79 Debug::printVar('Results', $aSearchWords);
81 foreach ($aSearchWords as $aSearchTerm) {
82 $aResults[] = new \Nominatim\Token\SpecialTerm(
83 $aSearchTerm['word_id'],
84 $aSearchTerm['class'],
86 \Nominatim\Operator::TYPE
90 Debug::printVar('Special term tokens', $aResults);
96 public function extractTokensFromPhrases(&$aPhrases)
98 // First get the normalized version of all phrases
102 foreach ($aPhrases as $iPhrase => $oPhrase) {
103 $sNormQuery .= ','.$this->normalizeString($oPhrase->getPhrase());
104 $sSQL .= 'make_standard_name(:' .$iPhrase.') as p'.$iPhrase.',';
105 $aParams[':'.$iPhrase] = $oPhrase->getPhrase();
107 // Conflicts between US state abbreviations and various words
108 // for 'the' in different languages
109 switch (strtolower($oPhrase->getPhrase())) {
111 $aParams[':'.$iPhrase] = 'illinois';
114 $aParams[':'.$iPhrase] = 'alabama';
117 $aParams[':'.$iPhrase] = 'louisiana';
120 $aParams[':'.$iPhrase] = $oPhrase->getPhrase();
124 $sSQL = substr($sSQL, 0, -1);
126 Debug::printSQL($sSQL);
127 Debug::printVar('SQL parameters', $aParams);
129 $aNormPhrases = $this->oDB->getRow($sSQL, $aParams);
131 Debug::printVar('SQL result', $aNormPhrases);
133 // now compute all possible tokens
134 $aWordLists = array();
136 foreach ($aNormPhrases as $sPhrase) {
137 $oWordList = new SimpleWordList($sPhrase);
139 foreach ($oWordList->getTokens() as $sToken) {
140 $aTokens[' '.$sToken] = ' '.$sToken;
141 $aTokens[$sToken] = $sToken;
144 $aWordLists[] = $oWordList;
147 Debug::printVar('Tokens', $aTokens);
148 Debug::printVar('WordLists', $aWordLists);
150 $oValidTokens = $this->computeValidTokens($aTokens, $sNormQuery);
152 foreach ($aPhrases as $iPhrase => $oPhrase) {
153 $oPhrase->setWordSets($aWordLists[$iPhrase]->getWordSets($oValidTokens));
156 return $oValidTokens;
160 private function computeValidTokens($aTokens, $sNormQuery)
162 $oValidTokens = new TokenList();
164 if (!empty($aTokens)) {
165 $this->addTokensFromDB($oValidTokens, $aTokens, $sNormQuery);
167 // Try more interpretations for Tokens that could not be matched.
168 foreach ($aTokens as $sToken) {
169 if ($sToken[0] != ' ' && !$oValidTokens->contains($sToken)) {
170 if (preg_match('/^([0-9]{5}) [0-9]{4}$/', $sToken, $aData)) {
171 // US ZIP+4 codes - merge in the 5-digit ZIP code
172 $oValidTokens->addToken(
174 new Token\Postcode(null, $aData[1], 'us')
176 } elseif (preg_match('/^[0-9]+$/', $sToken)) {
177 // Unknown single word token with a number.
178 // Assume it is a house number.
179 $oValidTokens->addToken(
181 new Token\HouseNumber(null, trim($sToken))
188 return $oValidTokens;
192 private function addTokensFromDB(&$oValidTokens, $aTokens, $sNormQuery)
194 // Check which tokens we have, get the ID numbers
195 $sSQL = 'SELECT word_id, word_token, word, class, type, country_code,';
196 $sSQL .= ' operator, coalesce(search_name_count, 0) as count';
197 $sSQL .= ' FROM word WHERE word_token in (';
198 $sSQL .= join(',', $this->oDB->getDBQuotedList($aTokens)).')';
200 Debug::printSQL($sSQL);
202 $aDBWords = $this->oDB->getAll($sSQL, null, 'Could not get word tokens.');
204 foreach ($aDBWords as $aWord) {
206 $iId = (int) $aWord['word_id'];
208 if ($aWord['class']) {
209 // Special terms need to appear in their normalized form.
210 // (postcodes are not normalized in the word table)
211 $sNormWord = $this->normalizeString($aWord['word']);
212 if ($aWord['word'] && strpos($sNormQuery, $sNormWord) === false) {
216 if ($aWord['class'] == 'place' && $aWord['type'] == 'house') {
217 $oToken = new Token\HouseNumber($iId, trim($aWord['word_token']));
218 } elseif ($aWord['class'] == 'place' && $aWord['type'] == 'postcode') {
220 && pg_escape_string($aWord['word']) == $aWord['word']
222 $oToken = new Token\Postcode(
225 $aWord['country_code']
229 // near and in operator the same at the moment
230 $oToken = new Token\SpecialTerm(
234 $aWord['operator'] ? Operator::NEAR : Operator::NONE
237 } elseif ($aWord['country_code']) {
238 $oToken = new Token\Country($iId, $aWord['country_code']);
239 } elseif ($aWord['word_token'][0] == ' ') {
240 $oToken = new Token\Word(
242 (int) $aWord['count'],
243 substr_count($aWord['word_token'], ' ')
245 // For backward compatibility: ignore all partial tokens with more
247 } elseif (strpos($aWord['word_token'], ' ') === false) {
248 $oToken = new Token\Partial(
250 $aWord['word_token'],
251 (int) $aWord['count']
256 // remove any leading spaces
257 if ($aWord['word_token'][0] == ' ') {
258 $oValidTokens->addToken(substr($aWord['word_token'], 1), $oToken);
260 $oValidTokens->addToken($aWord['word_token'], $oToken);