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https://github.com/osm-search/Nominatim.git
synced 2026-02-16 15:47:58 +00:00
rename legacy_icu tokenizer to icu tokenizer
The new icu tokenizer is now no longer compatible with the old legacy tokenizer in terms of data structures. Therefore there is also no longer a need to refer to the legacy tokenizer in the name.
This commit is contained in:
Sarah Hoffmann
212
lib-php/tokenizer/icu_tokenizer.php
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212
lib-php/tokenizer/icu_tokenizer.php
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<?php
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namespace Nominatim;
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require_once(CONST_LibDir.'/SimpleWordList.php');
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class Tokenizer
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{
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private $oDB;
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private $oNormalizer;
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private $oTransliterator;
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public function __construct(&$oDB)
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{
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$this->oDB =& $oDB;
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$this->oNormalizer = \Transliterator::createFromRules(CONST_Term_Normalization_Rules);
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$this->oTransliterator = \Transliterator::createFromRules(CONST_Transliteration);
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}
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public function checkStatus()
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{
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$sSQL = 'SELECT word_id FROM word WHERE word_id is not null limit 1';
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$iWordID = $this->oDB->getOne($sSQL);
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if ($iWordID === false) {
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throw new \Exception('Query failed', 703);
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}
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if (!$iWordID) {
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throw new \Exception('No value', 704);
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}
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}
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public function normalizeString($sTerm)
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{
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if ($this->oNormalizer === null) {
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return $sTerm;
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}
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return $this->oNormalizer->transliterate($sTerm);
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}
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private function makeStandardWord($sTerm)
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{
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return trim($this->oTransliterator->transliterate(' '.$sTerm.' '));
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}
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public function tokensForSpecialTerm($sTerm)
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{
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$aResults = array();
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$sSQL = "SELECT word_id, info->>'class' as class, info->>'type' as type ";
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$sSQL .= ' FROM word WHERE word_token = :term and type = \'S\'';
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Debug::printVar('Term', $sTerm);
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Debug::printSQL($sSQL);
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$aSearchWords = $this->oDB->getAll($sSQL, array(':term' => $this->makeStandardWord($sTerm)));
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Debug::printVar('Results', $aSearchWords);
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foreach ($aSearchWords as $aSearchTerm) {
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$aResults[] = new \Nominatim\Token\SpecialTerm(
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$aSearchTerm['word_id'],
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$aSearchTerm['class'],
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$aSearchTerm['type'],
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\Nominatim\Operator::TYPE
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);
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}
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Debug::printVar('Special term tokens', $aResults);
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return $aResults;
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}
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public function extractTokensFromPhrases(&$aPhrases)
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{
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$sNormQuery = '';
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$aWordLists = array();
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$aTokens = array();
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foreach ($aPhrases as $iPhrase => $oPhrase) {
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$sNormQuery .= ','.$this->normalizeString($oPhrase->getPhrase());
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$sPhrase = $this->makeStandardWord($oPhrase->getPhrase());
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Debug::printVar('Phrase', $sPhrase);
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$oWordList = new SimpleWordList($sPhrase);
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$aTokens = array_merge($aTokens, $oWordList->getTokens());
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$aWordLists[] = $oWordList;
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}
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Debug::printVar('Tokens', $aTokens);
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Debug::printVar('WordLists', $aWordLists);
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$oValidTokens = $this->computeValidTokens($aTokens, $sNormQuery);
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foreach ($aPhrases as $iPhrase => $oPhrase) {
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$oPhrase->setWordSets($aWordLists[$iPhrase]->getWordSets($oValidTokens));
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}
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return $oValidTokens;
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}
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private function computeValidTokens($aTokens, $sNormQuery)
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{
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$oValidTokens = new TokenList();
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if (!empty($aTokens)) {
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$this->addTokensFromDB($oValidTokens, $aTokens, $sNormQuery);
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// Try more interpretations for Tokens that could not be matched.
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foreach ($aTokens as $sToken) {
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if ($sToken[0] != ' ' && !$oValidTokens->contains($sToken)) {
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if (preg_match('/^([0-9]{5}) [0-9]{4}$/', $sToken, $aData)) {
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// US ZIP+4 codes - merge in the 5-digit ZIP code
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$oValidTokens->addToken(
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$sToken,
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new Token\Postcode(null, $aData[1], 'us')
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);
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} elseif (preg_match('/^[0-9]+$/', $sToken)) {
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// Unknown single word token with a number.
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// Assume it is a house number.
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$oValidTokens->addToken(
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$sToken,
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new Token\HouseNumber(null, trim($sToken))
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);
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}
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}
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}
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}
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return $oValidTokens;
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}
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private function addTokensFromDB(&$oValidTokens, $aTokens, $sNormQuery)
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{
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// Check which tokens we have, get the ID numbers
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$sSQL = 'SELECT word_id, word_token, type, word,';
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$sSQL .= " info->>'op' as operator,";
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$sSQL .= " info->>'class' as class, info->>'type' as ctype,";
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$sSQL .= " info->>'count' as count";
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$sSQL .= ' FROM word WHERE word_token in (';
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$sSQL .= join(',', $this->oDB->getDBQuotedList($aTokens)).')';
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Debug::printSQL($sSQL);
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$aDBWords = $this->oDB->getAll($sSQL, null, 'Could not get word tokens.');
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foreach ($aDBWords as $aWord) {
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$iId = (int) $aWord['word_id'];
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$sTok = $aWord['word_token'];
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switch ($aWord['type']) {
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case 'C': // country name tokens
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if ($aWord['word'] !== null) {
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$oValidTokens->addToken(
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$sTok,
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new Token\Country($iId, $aWord['word'])
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);
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}
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break;
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case 'H': // house number tokens
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$oValidTokens->addToken($sTok, new Token\HouseNumber($iId, $aWord['word_token']));
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break;
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case 'P': // postcode tokens
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// Postcodes are not normalized, so they may have content
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// that makes SQL injection possible. Reject postcodes
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// that would need special escaping.
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if ($aWord['word'] !== null
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&& pg_escape_string($aWord['word']) == $aWord['word']
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) {
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$sNormPostcode = $this->normalizeString($aWord['word']);
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if (strpos($sNormQuery, $sNormPostcode) !== false) {
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$oValidTokens->addToken(
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$sTok,
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new Token\Postcode($iId, $aWord['word'], null)
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);
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}
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}
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break;
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case 'S': // tokens for classification terms (special phrases)
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if ($aWord['class'] !== null && $aWord['ctype'] !== null) {
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$oValidTokens->addToken($sTok, new Token\SpecialTerm(
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$iId,
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$aWord['class'],
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$aWord['ctype'],
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(isset($aWord['operator'])) ? Operator::NEAR : Operator::NONE
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));
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}
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break;
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case 'W': // full-word tokens
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$oValidTokens->addToken($sTok, new Token\Word(
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$iId,
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(int) $aWord['count'],
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substr_count($aWord['word_token'], ' ')
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));
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break;
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case 'w': // partial word terms
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$oValidTokens->addToken($sTok, new Token\Partial(
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$iId,
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$aWord['word_token'],
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(int) $aWord['count']
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));
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break;
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default:
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break;
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}
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}
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}
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}
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