-<?php
-
-namespace Nominatim;
-
-/**
- * A geographic point with a search radius.
- */
-class NearPoint
-{
- private $fLat;
- private $fLon;
- private $fRadius;
-
- private $sSQL;
-
-
- public function __construct($lat, $lon, $radius = 0.1)
- {
- $this->fLat = (float)$lat;
- $this->fLon = (float)$lon;
- $this->fRadius = (float)$radius;
- $this->sSQL = 'ST_SetSRID(ST_Point('.$this->fLon.','.$this->fLat.'),4326)';
- }
-
- public function lat()
- {
- return $this->fLat;
- }
-
- public function lon()
- {
- return $this->fLon;
- }
-
- public function radius()
- {
- return $this->fRadius;
- }
-
- public function distanceSQL($sObj)
- {
- return 'ST_Distance('.$this->sSQL.", $sObj)";
- }
-
- public function withinSQL($sObj)
- {
- return sprintf('ST_DWithin(%s, %s, %F)', $sObj, $this->sSQL, $this->fRadius);
- }
-
- /**
- * Check that the coordinates are valid WSG84 coordinates.
- *
- * @return bool True if the coordinates are correctly bounded.
- */
- public function isValid()
- {
- return ($this->fLat <= 90.1
- && $this->fLat >= -90.1
- && $this->fLon <= 180.1
- && $this->fLon >= -180.1);
- }
-
- /**
- * Extract a coordinate point from a query string.
- *
- * If a coordinate is found an array of a new NearPoint and the
- * remaining query is returned or false otherwise.
- *
- * @param string $sQuery Query to scan.
- *
- * @return array|false If a coordinate was found, an array with
- * `pt` as the NearPoint coordinates and `query`
- * with the remaining query string. False otherwiese.
- */
- public static function extractFromQuery($sQuery)
- {
- // Do we have anything that looks like a lat/lon pair?
- // returns array(lat,lon,query_with_lat_lon_removed)
- // or null
- $sFound = null;
- $fQueryLat = null;
- $fQueryLon = null;
-
- if (preg_match('/\\s*([NS])[ ]+([0-9]+[0-9.]*)[° ]+([0-9.]+)?[′\']*[, ]+([EW])[ ]+([0-9]+)[° ]+([0-9]+[0-9.]*)[′\']*\\s*/', $sQuery, $aData)) {
- /* 1 2 3 4 5 6
- * degrees decimal minutes
- * N 40 26.767, W 79 58.933
- * N 40°26.767′, W 79°58.933′
- */
- $sFound = $aData[0];
- $fQueryLat = ($aData[1]=='N'?1:-1) * ($aData[2] + $aData[3]/60);
- $fQueryLon = ($aData[4]=='E'?1:-1) * ($aData[5] + $aData[6]/60);
- } elseif (preg_match('/\\s*([0-9]+)[° ]+([0-9]+[0-9.]*)?[′\']*[ ]+([NS])[, ]+([0-9]+)[° ]+([0-9]+[0-9.]*)?[′\' ]+([EW])\\s*/', $sQuery, $aData)) {
- /* 1 2 3 4 5 6
- * degrees decimal minutes
- * 40 26.767 N, 79 58.933 W
- * 40° 26.767′ N 79° 58.933′ W
- */
- $sFound = $aData[0];
- $fQueryLat = ($aData[3]=='N'?1:-1) * ($aData[1] + $aData[2]/60);
- $fQueryLon = ($aData[6]=='E'?1:-1) * ($aData[4] + $aData[5]/60);
- } elseif (preg_match('/\\s*([NS])[ ]([0-9]+)[° ]+([0-9]+)[′\' ]+([0-9]+)[″"]*[, ]+([EW])[ ]([0-9]+)[° ]+([0-9]+)[′\' ]+([0-9]+)[″"]*\\s*/', $sQuery, $aData)) {
- /* 1 2 3 4 5 6 7 8
- * degrees decimal seconds
- * N 40 26 46 W 79 58 56
- * N 40° 26′ 46″, W 79° 58′ 56″
- */
- $sFound = $aData[0];
- $fQueryLat = ($aData[1]=='N'?1:-1) * ($aData[2] + $aData[3]/60 + $aData[4]/3600);
- $fQueryLon = ($aData[5]=='E'?1:-1) * ($aData[6] + $aData[7]/60 + $aData[8]/3600);
- } elseif (preg_match('/\\s*([0-9]+)[° ]+([0-9]+)[′\' ]+([0-9]+)[″" ]+([NS])[, ]+([0-9]+)[° ]+([0-9]+)[′\' ]+([0-9]+)[″" ]+([EW])\\s*/', $sQuery, $aData)) {
- /* 1 2 3 4 5 6 7 8
- * degrees decimal seconds
- * 40 26 46 N 79 58 56 W
- * 40° 26′ 46″ N, 79° 58′ 56″ W
- */
- $sFound = $aData[0];
- $fQueryLat = ($aData[4]=='N'?1:-1) * ($aData[1] + $aData[2]/60 + $aData[3]/3600);
- $fQueryLon = ($aData[8]=='E'?1:-1) * ($aData[5] + $aData[6]/60 + $aData[7]/3600);
- } elseif (preg_match('/\\s*([NS])[ ]([0-9]+[0-9]*\\.[0-9]+)[°]*[, ]+([EW])[ ]([0-9]+[0-9]*\\.[0-9]+)[°]*\\s*/', $sQuery, $aData)) {
- /* 1 2 3 4
- * degrees decimal
- * N 40.446° W 79.982°
- */
- $sFound = $aData[0];
- $fQueryLat = ($aData[1]=='N'?1:-1) * ($aData[2]);
- $fQueryLon = ($aData[3]=='E'?1:-1) * ($aData[4]);
- } elseif (preg_match('/\\s*([0-9]+[0-9]*\\.[0-9]+)[° ]+([NS])[, ]+([0-9]+[0-9]*\\.[0-9]+)[° ]+([EW])\\s*/', $sQuery, $aData)) {
- /* 1 2 3 4
- * degrees decimal
- * 40.446° N 79.982° W
- */
- $sFound = $aData[0];
- $fQueryLat = ($aData[2]=='N'?1:-1) * ($aData[1]);
- $fQueryLon = ($aData[4]=='E'?1:-1) * ($aData[3]);
- } elseif (preg_match('/(\\s*\\[|^\\s*|\\s*)(-?[0-9]+[0-9]*\\.[0-9]+)[, ]+(-?[0-9]+[0-9]*\\.[0-9]+)(\\]\\s*|\\s*$|\\s*)/', $sQuery, $aData)) {
- /* 1 2 3 4
- * degrees decimal
- * 12.34, 56.78
- * 12.34 56.78
- * [12.456,-78.90]
- */
- $sFound = $aData[0];
- $fQueryLat = $aData[2];
- $fQueryLon = $aData[3];
- } else {
- return false;
- }
-
- $oPt = new NearPoint($fQueryLat, $fQueryLon);
-
- if (!$oPt->isValid()) return false;
-
- $sQuery = trim(str_replace($sFound, ' ', $sQuery));
-
- return array('pt' => $oPt, 'query' => $sQuery);
- }
-}
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