mirror of
https://github.com/osm-search/Nominatim.git
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111 lines
3.3 KiB
PHP
111 lines
3.3 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 Word
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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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/// Number of terms in the word.
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private $iTermCount;
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public function __construct($iId, $iSearchNameCount, $iTermCount)
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{
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$this->iId = $iId;
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$this->iSearchNameCount = $iSearchNameCount;
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$this->iTermCount = $iTermCount;
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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, $oPosition)
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{
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// Full words can only be a name if they appear at the beginning
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// of the phrase. In structured search the name must forcably in
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// the first phrase. In unstructured search it may be in a later
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// phrase when the first phrase is a house number.
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if ($oSearch->hasName()
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|| !($oPosition->isFirstPhrase() || $oPosition->isPhrase(''))
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) {
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if ($this->iTermCount > 1
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&& ($oPosition->isPhrase('') || !$oPosition->isFirstPhrase())
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) {
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$oNewSearch = $oSearch->clone(1);
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$oNewSearch->addAddressToken($this->iId);
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return array($oNewSearch);
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}
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} elseif (!$oSearch->hasName(true)) {
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$oNewSearch = $oSearch->clone(1);
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$oNewSearch->addNameToken(
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$this->iId,
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CONST_Search_NameOnlySearchFrequencyThreshold
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&& $this->iSearchNameCount
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< CONST_Search_NameOnlySearchFrequencyThreshold
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);
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return array($oNewSearch);
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}
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return array();
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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' => 'word',
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'Info' => array(
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'count' => $this->iSearchNameCount,
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'terms' => $this->iTermCount
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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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