refector reverse geocoding into its own class

diff --git a/lib/PlaceLookup.php b/lib/PlaceLookup.php
new file mode 100644 (file)
index 0000000..07cf806
--- /dev/null
+++ b/lib/PlaceLookup.php
@@ -0,0 +1,76 @@
+<?php
+       class PlaceLookup
+       {
+               protected $oDB;
+
+               protected $iPlaceID;
+
+               protected $aLangPrefOrder = array();
+
+               protected $bAddressDetails = false;
+
+               function PlaceLookup(&$oDB)
+               {
+                       $this->oDB =& $oDB;
+               }
+
+               function setLanguagePreference($aLangPrefOrder)
+               {
+                       $this->aLangPrefOrder = $aLangPrefOrder;
+               }
+
+               function setIncludeAddressDetails($bAddressDetails = true)
+               {
+                       $this->bAddressDetails = $bAddressDetails;
+               }
+
+               function setPlaceID($iPlaceID)
+               {
+                       $this->iPlaceID = $iPlaceID;
+               }
+
+               function setOSMID($sType, $iID)
+               {
+                       $sSQL = "select place_id from placex where osm_type = '".pg_escape_string($sType)."' and osm_id = ".(int)$iID." order by type = 'postcode' asc";
+                       $this->iPlaceID = $this->oDB->getOne($sSQL);
+               }
+
+               function lookup()
+               {
+                       $sLanguagePrefArraySQL = "ARRAY[".join(',',array_map("getDBQuoted", $this->aLangPrefOrder))."]";
+
+                       $sSQL = "select placex.*,";
+                       $sSQL .= " get_address_by_language(place_id, $sLanguagePrefArraySQL) as langaddress,";
+                       $sSQL .= " get_name_by_language(name, $sLanguagePrefArraySQL) as placename,";
+                       $sSQL .= " get_name_by_language(name, ARRAY['ref']) as ref,";
+                       $sSQL .= " st_y(centroid) as lat, st_x(centroid) as lon";
+                       $sSQL .= " from placex where place_id = ".(int)$this->iPlaceID;
+                       $aPlace = $this->oDB->getRow($sSQL);
+
+                       if ($this->bAddressDetails)
+                       {
+                               $aAddress = getAddressDetails($this->oDB, $sLanguagePrefArraySQL, $this->iPlaceID, $aPlace['calculated_country_code']);
+                               $aPlace['aAddress'] = $aAddress;
+                       }
+
+                       $aClassType = getClassTypes();
+                       $sAddressType = '';
+                       $sClassType = $aPlace['class'].':'.$aPlace['type'].':'.$aPlace['admin_level'];
+                       if (isset($aClassType[$sClassType]) && isset($aClassType[$sClassType]['simplelabel']))
+                       {
+                               $sAddressType = $aClassType[$aClassType]['simplelabel'];
+                       }
+                       else
+                       {
+                               $sClassType = $aPlace['class'].':'.$aPlace['type'];
+                               if (isset($aClassType[$sClassType]) && isset($aClassType[$sClassType]['simplelabel']))
+                                       $sAddressType = $aClassType[$sClassType]['simplelabel'];
+                               else $sAddressType = $aPlace['class'];
+                       }
+
+                       $aPlace['addresstype'] = $sAddressType;
+
+                       return $aPlace;
+               }
+       }
+?>

diff --git a/lib/ReverseGeocode.php b/lib/ReverseGeocode.php
new file mode 100644 (file)
index 0000000..8503e1e
--- /dev/null
+++ b/lib/ReverseGeocode.php
@@ -0,0 +1,139 @@
+<?php
+       class ReverseGeocode
+       {
+               protected $oDB;
+
+               protected $fLat;
+               protected $fLon;
+               protected $iMaxRank = 28;
+
+               protected $aLangPrefOrder = array();
+
+               protected $bShowAddressDetails = true;
+
+               function ReverseGeocode(&$oDB)
+               {
+                       $this->oDB =& $oDB;
+               }
+
+               function setLanguagePreference($aLangPref)
+               {
+                       $this->aLangPrefOrder = $aLangPref;
+               }
+
+               function setIncludeAddressDetails($bAddressDetails = true)
+               {
+                       $this->bAddressDetails = $bAddressDetails;
+               }
+
+               function setLatLon($fLat, $fLon)
+               {
+                       $this->fLat = (float)$fLat;
+                       $this->fLon = (float)$fLon;
+               }
+
+               function setRank($iRank)
+               {
+                       $this->iMaxRank = $iRank;
+               }
+
+               function setZoom($iZoom)
+               {
+                       // Zoom to rank, this could probably be calculated but a lookup gives fine control
+                       $aZoomRank = array(
+                               0 => 2, // Continent / Sea
+                               1 => 2,
+                               2 => 2,
+                               3 => 4, // Country
+                               4 => 4,
+                               5 => 8, // State
+                               6 => 10, // Region
+                               7 => 10,
+                               8 => 12, // County
+                               9 => 12,
+                               10 => 17, // City
+                               11 => 17,
+                               12 => 18, // Town / Village
+                               13 => 18,
+                               14 => 22, // Suburb
+                               15 => 22,
+                               16 => 26, // Street, TODO: major street?
+                               17 => 26,
+                               18 => 30, // or >, Building
+                               19 => 30, // or >, Building
+                               );
+                       $this->iMaxRank = (isset($iZoom) && isset($aZoomRank[$iZoom]))?$aZoomRank[$iZoom]:28;
+               }
+
+               function lookup()
+               {
+                       $sPointSQL = 'ST_SetSRID(ST_Point('.$this->fLon.','.$this->fLat.'),4326)';
+                       $iMaxRank = $this->iMaxRank;
+
+                       // Find the nearest point
+                       $fSearchDiam = 0.0004;
+                       $iPlaceID = null;
+                       $aArea = false;
+                       $fMaxAreaDistance = 1;
+                       while(!$iPlaceID && $fSearchDiam < $fMaxAreaDistance)
+                       {
+                               $fSearchDiam = $fSearchDiam * 2;
+
+                               // If we have to expand the search area by a large amount then we need a larger feature
+                               // then there is a limit to how small the feature should be
+                               if ($fSearchDiam > 2 && $iMaxRank > 4) $iMaxRank = 4;
+                               if ($fSearchDiam > 1 && $iMaxRank > 9) $iMaxRank = 8;
+                               if ($fSearchDiam > 0.8 && $iMaxRank > 10) $iMaxRank = 10;
+                               if ($fSearchDiam > 0.6 && $iMaxRank > 12) $iMaxRank = 12;
+                               if ($fSearchDiam > 0.2 && $iMaxRank > 17) $iMaxRank = 17;
+                               if ($fSearchDiam > 0.1 && $iMaxRank > 18) $iMaxRank = 18;
+                               if ($fSearchDiam > 0.008 && $iMaxRank > 22) $iMaxRank = 22;
+                               if ($fSearchDiam > 0.001 && $iMaxRank > 26) $iMaxRank = 26;
+
+                               $sSQL = 'select place_id,parent_place_id,rank_search from placex';
+                               $sSQL .= ' WHERE ST_DWithin('.$sPointSQL.', geometry, '.$fSearchDiam.')';
+                               $sSQL .= ' and rank_search != 28 and rank_search >= '.$iMaxRank;
+                               $sSQL .= ' and (name is not null or housenumber is not null)';
+                               $sSQL .= ' and class not in (\'waterway\',\'railway\',\'tunnel\',\'bridge\')';
+                               $sSQL .= ' and (ST_GeometryType(geometry) not in (\'ST_Polygon\',\'ST_MultiPolygon\') ';
+                               $sSQL .= ' and indexed_status = 0 ';
+                               $sSQL .= ' OR ST_DWithin('.$sPointSQL.', centroid, '.$fSearchDiam.'))';
+                               $sSQL .= ' ORDER BY ST_distance('.$sPointSQL.', geometry) ASC limit 1';
+                               if (CONST_Debug) var_dump($sSQL);
+                               $aPlace = $this->oDB->getRow($sSQL);
+                               if (PEAR::IsError($aPlace))
+                               {
+                                       failInternalError("Could not determine closest place.", $sSQL, $aPlace);
+                               }
+                               $iPlaceID = $aPlace['place_id'];
+                               $iParentPlaceID = $aPlace['parent_place_id'];
+                       }
+
+                       // The point we found might be too small - use the address to find what it is a child of
+                       if ($iPlaceID && $iMaxRank < 28)
+                       {
+                               if ($aPlace['rank_search'] > 28 && $iParentPlaceID)
+                               {
+                                       $iPlaceID = $iParentPlaceID;
+                               }
+                               $sSQL = "select address_place_id from place_addressline where place_id = $iPlaceID order by abs(cached_rank_address - $iMaxRank) asc,cached_rank_address desc,isaddress desc,distance desc limit 1";
+                               $iPlaceID = $this->oDB->getOne($sSQL);
+                               if (PEAR::IsError($iPlaceID))
+                               {
+                                       failInternalError("Could not get parent for place.", $sSQL, $iPlaceID);
+                               }
+                               if (!$iPlaceID)
+                               {
+                                       $iPlaceID = $aPlace['place_id'];
+                               }
+                       }
+
+                       $oPlaceLookup = new PlaceLookup($this->oDB);
+                       $oPlaceLookup->setLanguagePreference($this->aLangPrefOrder);
+                       $oPlaceLookup->setIncludeAddressDetails($this->bAddressDetails);
+                       $oPlaceLookup->setPlaceId($iPlaceID);
+
+                       return $oPlaceLookup->lookup();
+               }
+       }
+?>