mirror of
https://github.com/osm-search/Nominatim.git
synced 2024-11-22 21:28:10 +03:00
128 lines
3.6 KiB
PHP
128 lines
3.6 KiB
PHP
<?php
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/**
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* SPDX-License-Identifier: GPL-2.0-only
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*
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* This file is part of Nominatim. (https://nominatim.org)
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*
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* Copyright (C) 2022 by the Nominatim developer community.
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* For a full list of authors see the git log.
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*/
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namespace Nominatim\Token;
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/**
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* A standard word token.
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*/
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class Partial
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{
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/// Database word id, if applicable.
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private $iId;
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/// Number of appearances in the database.
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private $iSearchNameCount;
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/// True, if the token consists exclusively of digits and spaces.
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private $bNumberToken;
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public function __construct($iId, $sToken, $iSearchNameCount)
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{
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$this->iId = $iId;
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$this->bNumberToken = (bool) preg_match('#^[0-9 ]+$#', $sToken);
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$this->iSearchNameCount = $iSearchNameCount;
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}
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public function getId()
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{
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return $this->iId;
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}
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/**
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* Check if the token can be added to the given search.
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* Derive new searches by adding this token to an existing search.
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*
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* @param object $oSearch Partial search description derived so far.
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* @param object $oPosition Description of the token position within
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the query.
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*
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* @return True if the token is compatible with the search configuration
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* given the position.
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*/
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public function isExtendable($oSearch, $oPosition)
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{
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return !$oPosition->isPhrase('country');
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}
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/**
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* Derive new searches by adding this token to an existing search.
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*
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* @param object $oSearch Partial search description derived so far.
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* @param object $oPosition Description of the token position within
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the query.
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*
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* @return SearchDescription[] List of derived search descriptions.
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*/
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public function extendSearch($oSearch, $oPosition)
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{
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$aNewSearches = array();
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// Partial token in Address.
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if (($oPosition->isPhrase('') || !$oPosition->isFirstPhrase())
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&& $oSearch->hasName()
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) {
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$iSearchCost = $this->bNumberToken ? 2 : 1;
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if ($this->iSearchNameCount >= CONST_Max_Word_Frequency) {
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$iSearchCost += 1;
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}
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$oNewSearch = $oSearch->clone($iSearchCost);
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$oNewSearch->addAddressToken(
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$this->iId,
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$this->iSearchNameCount < CONST_Max_Word_Frequency
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);
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$aNewSearches[] = $oNewSearch;
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}
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// Partial token in Name.
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if ((!$oSearch->hasPostcode() && !$oSearch->hasAddress())
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&& (!$oSearch->hasName(true)
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|| $oSearch->getNamePhrase() == $oPosition->getPhrase())
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) {
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$iSearchCost = 1;
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if (!$oSearch->hasName(true)) {
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$iSearchCost += 1;
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}
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if ($this->bNumberToken) {
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$iSearchCost += 1;
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}
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$oNewSearch = $oSearch->clone($iSearchCost);
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$oNewSearch->addPartialNameToken(
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$this->iId,
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$this->iSearchNameCount < CONST_Max_Word_Frequency,
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$this->iSearchNameCount > CONST_Search_NameOnlySearchFrequencyThreshold,
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$oPosition->getPhrase()
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);
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$aNewSearches[] = $oNewSearch;
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}
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return $aNewSearches;
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}
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public function debugInfo()
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{
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return array(
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'ID' => $this->iId,
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'Type' => 'partial',
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'Info' => array(
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'count' => $this->iSearchNameCount
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)
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);
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}
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public function debugCode()
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{
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return 'w';
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}
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}
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