<?php
+/**
+ * SPDX-License-Identifier: GPL-2.0-only
+ *
+ * This file is part of Nominatim. (https://nominatim.org)
+ *
+ * Copyright (C) 2022 by the Nominatim developer community.
+ * For a full list of authors see the git log.
+ */
+
+namespace Nominatim;
+
+require_once(CONST_LibDir.'/SimpleWordList.php');
+
+class Tokenizer
+{
+ private $oDB;
+
+ private $oNormalizer = null;
+
+ public function __construct(&$oDB)
+ {
+ $this->oDB =& $oDB;
+ $this->oNormalizer = \Transliterator::createFromRules(CONST_Term_Normalization_Rules);
+ }
+
+ public function checkStatus()
+ {
+ $sStandardWord = $this->oDB->getOne("SELECT make_standard_name('a')");
+ if ($sStandardWord === false) {
+ throw new \Exception('Module failed', 701);
+ }
+
+ if ($sStandardWord != 'a') {
+ throw new \Exception('Module call failed', 702);
+ }
+
+ $sSQL = "SELECT word_id FROM word WHERE word_token IN (' a')";
+ $iWordID = $this->oDB->getOne($sSQL);
+ if ($iWordID === false) {
+ throw new \Exception('Query failed', 703);
+ }
+ if (!$iWordID) {
+ throw new \Exception('No value', 704);
+ }
+ }
+
+
+ public function normalizeString($sTerm)
+ {
+ if ($this->oNormalizer === null) {
+ return $sTerm;
+ }
+
+ return $this->oNormalizer->transliterate($sTerm);
+ }
+
+
+ public function mostFrequentWords($iNum)
+ {
+ $sSQL = 'SELECT word FROM word WHERE word is not null ';
+ $sSQL .= 'ORDER BY search_name_count DESC LIMIT '.$iNum;
+ return $this->oDB->getCol($sSQL);
+ }
+
+
+ public function tokensForSpecialTerm($sTerm)
+ {
+ $aResults = array();
+
+ $sSQL = 'SELECT word_id, class, type FROM word ';
+ $sSQL .= ' WHERE word_token = \' \' || make_standard_name(:term)';
+ $sSQL .= ' AND class is not null AND class not in (\'place\')';
+
+ Debug::printVar('Term', $sTerm);
+ Debug::printSQL($sSQL);
+ $aSearchWords = $this->oDB->getAll($sSQL, array(':term' => $sTerm));
+
+ Debug::printVar('Results', $aSearchWords);
+
+ foreach ($aSearchWords as $aSearchTerm) {
+ $aResults[] = new \Nominatim\Token\SpecialTerm(
+ $aSearchTerm['word_id'],
+ $aSearchTerm['class'],
+ $aSearchTerm['type'],
+ \Nominatim\Operator::TYPE
+ );
+ }
+
+ Debug::printVar('Special term tokens', $aResults);
+
+ return $aResults;
+ }
+
+
+ public function extractTokensFromPhrases(&$aPhrases)
+ {
+ // First get the normalized version of all phrases
+ $sNormQuery = '';
+ $sSQL = 'SELECT ';
+ $aParams = array();
+ foreach ($aPhrases as $iPhrase => $oPhrase) {
+ $sNormQuery .= ','.$this->normalizeString($oPhrase->getPhrase());
+ $sSQL .= 'make_standard_name(:' .$iPhrase.') as p'.$iPhrase.',';
+ $aParams[':'.$iPhrase] = $oPhrase->getPhrase();
+
+ // Conflicts between US state abbreviations and various words
+ // for 'the' in different languages
+ switch (strtolower($oPhrase->getPhrase())) {
+ case 'il':
+ $aParams[':'.$iPhrase] = 'illinois';
+ break;
+ case 'al':
+ $aParams[':'.$iPhrase] = 'alabama';
+ break;
+ case 'la':
+ $aParams[':'.$iPhrase] = 'louisiana';
+ break;
+ default:
+ $aParams[':'.$iPhrase] = $oPhrase->getPhrase();
+ break;
+ }
+ }
+ $sSQL = substr($sSQL, 0, -1);
+
+ Debug::printSQL($sSQL);
+ Debug::printVar('SQL parameters', $aParams);
+
+ $aNormPhrases = $this->oDB->getRow($sSQL, $aParams);
+
+ Debug::printVar('SQL result', $aNormPhrases);
+
+ // now compute all possible tokens
+ $aWordLists = array();
+ $aTokens = array();
+ foreach ($aNormPhrases as $sPhrase) {
+ $oWordList = new SimpleWordList($sPhrase);
+
+ foreach ($oWordList->getTokens() as $sToken) {
+ $aTokens[' '.$sToken] = ' '.$sToken;
+ $aTokens[$sToken] = $sToken;
+ }
+
+ $aWordLists[] = $oWordList;
+ }
+
+ Debug::printVar('Tokens', $aTokens);
+ Debug::printVar('WordLists', $aWordLists);
+
+ $oValidTokens = $this->computeValidTokens($aTokens, $sNormQuery);
+
+ foreach ($aPhrases as $iPhrase => $oPhrase) {
+ $oPhrase->setWordSets($aWordLists[$iPhrase]->getWordSets($oValidTokens));
+ }
+
+ return $oValidTokens;
+ }
+
+
+ private function computeValidTokens($aTokens, $sNormQuery)
+ {
+ $oValidTokens = new TokenList();
+
+ if (!empty($aTokens)) {
+ $this->addTokensFromDB($oValidTokens, $aTokens, $sNormQuery);
+
+ // Try more interpretations for Tokens that could not be matched.
+ foreach ($aTokens as $sToken) {
+ if ($sToken[0] != ' ' && !$oValidTokens->contains($sToken)) {
+ if (preg_match('/^([0-9]{5}) [0-9]{4}$/', $sToken, $aData)) {
+ // US ZIP+4 codes - merge in the 5-digit ZIP code
+ $oValidTokens->addToken(
+ $sToken,
+ new Token\Postcode(null, $aData[1], 'us')
+ );
+ } elseif (preg_match('/^[0-9]+$/', $sToken)) {
+ // Unknown single word token with a number.
+ // Assume it is a house number.
+ $oValidTokens->addToken(
+ $sToken,
+ new Token\HouseNumber(null, trim($sToken))
+ );
+ }
+ }
+ }
+ }
+
+ return $oValidTokens;
+ }
+
+
+ private function addTokensFromDB(&$oValidTokens, $aTokens, $sNormQuery)
+ {
+ // Check which tokens we have, get the ID numbers
+ $sSQL = 'SELECT word_id, word_token, word, class, type, country_code,';
+ $sSQL .= ' operator, coalesce(search_name_count, 0) as count';
+ $sSQL .= ' FROM word WHERE word_token in (';
+ $sSQL .= join(',', $this->oDB->getDBQuotedList($aTokens)).')';
+
+ Debug::printSQL($sSQL);
+
+ $aDBWords = $this->oDB->getAll($sSQL, null, 'Could not get word tokens.');
+
+ foreach ($aDBWords as $aWord) {
+ $oToken = null;
+ $iId = (int) $aWord['word_id'];
+
+ if ($aWord['class']) {
+ // Special terms need to appear in their normalized form.
+ // (postcodes are not normalized in the word table)
+ $sNormWord = $this->normalizeString($aWord['word']);
+ if ($aWord['word'] && strpos($sNormQuery, $sNormWord) === false) {
+ continue;
+ }
+
+ if ($aWord['class'] == 'place' && $aWord['type'] == 'house') {
+ $oToken = new Token\HouseNumber($iId, trim($aWord['word_token']));
+ } elseif ($aWord['class'] == 'place' && $aWord['type'] == 'postcode') {
+ if ($aWord['word']
+ && pg_escape_string($aWord['word']) == $aWord['word']
+ ) {
+ $oToken = new Token\Postcode(
+ $iId,
+ $aWord['word'],
+ $aWord['country_code']
+ );
+ }
+ } else {
+ // near and in operator the same at the moment
+ $oToken = new Token\SpecialTerm(
+ $iId,
+ $aWord['class'],
+ $aWord['type'],
+ $aWord['operator'] ? Operator::NEAR : Operator::NONE
+ );
+ }
+ } elseif ($aWord['country_code']) {
+ $oToken = new Token\Country($iId, $aWord['country_code']);
+ } elseif ($aWord['word_token'][0] == ' ') {
+ $oToken = new Token\Word(
+ $iId,
+ (int) $aWord['count'],
+ substr_count($aWord['word_token'], ' ')
+ );
+ // For backward compatibility: ignore all partial tokens with more
+ // than one word.
+ } elseif (strpos($aWord['word_token'], ' ') === false) {
+ $oToken = new Token\Partial(
+ $iId,
+ $aWord['word_token'],
+ (int) $aWord['count']
+ );
+ }
+
+ if ($oToken) {
+ // remove any leading spaces
+ if ($aWord['word_token'][0] == ' ') {
+ $oValidTokens->addToken(substr($aWord['word_token'], 1), $oToken);
+ } else {
+ $oValidTokens->addToken($aWord['word_token'], $oToken);
+ }
+ }
+ }
+ }
+}
projects / nominatim.git / blobdiff