lib/Geocode.php

   1 <?php
   2
   3 namespace Nominatim;
   4
   5 require_once(CONST_BasePath.'/lib/NearPoint.php');
   6 require_once(CONST_BasePath.'/lib/PlaceLookup.php');
   7 require_once(CONST_BasePath.'/lib/ReverseGeocode.php');
   8
   9 class Geocode
  10 {
  11     protected $oDB;
  12
  13     protected $aLangPrefOrder = array();
  14
  15     protected $bIncludeAddressDetails = false;
  16     protected $bIncludeExtraTags = false;
  17     protected $bIncludeNameDetails = false;
  18
  19     protected $bIncludePolygonAsPoints = false;
  20     protected $bIncludePolygonAsText = false;
  21     protected $bIncludePolygonAsGeoJSON = false;
  22     protected $bIncludePolygonAsKML = false;
  23     protected $bIncludePolygonAsSVG = false;
  24     protected $fPolygonSimplificationThreshold = 0.0;
  25
  26     protected $aExcludePlaceIDs = array();
  27     protected $bDeDupe = true;
  28     protected $bReverseInPlan = false;
  29
  30     protected $iLimit = 20;
  31     protected $iFinalLimit = 10;
  32     protected $iOffset = 0;
  33     protected $bFallback = false;
  34
  35     protected $aCountryCodes = false;
  36
  37     protected $bBoundedSearch = false;
  38     protected $aViewBox = false;
  39     protected $sViewboxCentreSQL = false;
  40     protected $sViewboxSmallSQL = false;
  41     protected $sViewboxLargeSQL = false;
  42
  43     protected $iMaxRank = 20;
  44     protected $iMinAddressRank = 0;
  45     protected $iMaxAddressRank = 30;
  46     protected $aAddressRankList = array();
  47     protected $exactMatchCache = array();
  48
  49     protected $sAllowedTypesSQLList = false;
  50
  51     protected $sQuery = false;
  52     protected $aStructuredQuery = false;
  53
  54     protected $oNormalizer = null;
  55
  56
  57     public function __construct(&$oDB)
  58     {
  59         $this->oDB =& $oDB;
  60         $this->oNormalizer = \Transliterator::createFromRules(CONST_Term_Normalization_Rules);
  61     }
  62
  63     private function normTerm($sTerm)
  64     {
  65         if ($this->oNormalizer === null) {
  66             return null;
  67         }
  68
  69         return $this->oNormalizer->transliterate($sTerm);
  70     }
  71
  72     public function setReverseInPlan($bReverse)
  73     {
  74         $this->bReverseInPlan = $bReverse;
  75     }
  76
  77     public function setLanguagePreference($aLangPref)
  78     {
  79         $this->aLangPrefOrder = $aLangPref;
  80     }
  81
  82     public function getMoreUrlParams()
  83     {
  84         if ($this->aStructuredQuery) {
  85             $aParams = $this->aStructuredQuery;
  86         } else {
  87             $aParams = array('q' => $this->sQuery);
  88         }
  89
  90         if ($this->aExcludePlaceIDs) {
  91             $aParams['exclude_place_ids'] = implode(',', $this->aExcludePlaceIDs);
  92         }
  93
  94         if ($this->bIncludeAddressDetails) $aParams['addressdetails'] = '1';
  95         if ($this->bIncludeExtraTags) $aParams['extratags'] = '1';
  96         if ($this->bIncludeNameDetails) $aParams['namedetails'] = '1';
  97
  98         if ($this->bIncludePolygonAsPoints) $aParams['polygon'] = '1';
  99         if ($this->bIncludePolygonAsText) $aParams['polygon_text'] = '1';
 100         if ($this->bIncludePolygonAsGeoJSON) $aParams['polygon_geojson'] = '1';
 101         if ($this->bIncludePolygonAsKML) $aParams['polygon_kml'] = '1';
 102         if ($this->bIncludePolygonAsSVG) $aParams['polygon_svg'] = '1';
 103
 104         if ($this->fPolygonSimplificationThreshold > 0.0) {
 105             $aParams['polygon_threshold'] = $this->fPolygonSimplificationThreshold;
 106         }
 107
 108         if ($this->bBoundedSearch) $aParams['bounded'] = '1';
 109         if (!$this->bDeDupe) $aParams['dedupe'] = '0';
 110
 111         if ($this->aCountryCodes) {
 112             $aParams['countrycodes'] = implode(',', $this->aCountryCodes);
 113         }
 114
 115         if ($this->aViewBox) {
 116             $aParams['viewbox'] = $this->aViewBox[0].','.$this->aViewBox[3]
 117                                   .','.$this->aViewBox[2].','.$this->aViewBox[1];
 118         }
 119
 120         return $aParams;
 121     }
 122
 123     public function setIncludePolygonAsPoints($b = true)
 124     {
 125         $this->bIncludePolygonAsPoints = $b;
 126     }
 127
 128     public function setIncludePolygonAsText($b = true)
 129     {
 130         $this->bIncludePolygonAsText = $b;
 131     }
 132
 133     public function setIncludePolygonAsGeoJSON($b = true)
 134     {
 135         $this->bIncludePolygonAsGeoJSON = $b;
 136     }
 137
 138     public function setIncludePolygonAsKML($b = true)
 139     {
 140         $this->bIncludePolygonAsKML = $b;
 141     }
 142
 143     public function setIncludePolygonAsSVG($b = true)
 144     {
 145         $this->bIncludePolygonAsSVG = $b;
 146     }
 147
 148     public function setPolygonSimplificationThreshold($f)
 149     {
 150         $this->fPolygonSimplificationThreshold = $f;
 151     }
 152
 153     public function setLimit($iLimit = 10)
 154     {
 155         if ($iLimit > 50) $iLimit = 50;
 156         if ($iLimit < 1) $iLimit = 1;
 157
 158         $this->iFinalLimit = $iLimit;
 159         $this->iLimit = $iLimit + min($iLimit, 10);
 160     }
 161
 162     public function setFeatureType($sFeatureType)
 163     {
 164         switch ($sFeatureType) {
 165             case 'country':
 166                 $this->setRankRange(4, 4);
 167                 break;
 168             case 'state':
 169                 $this->setRankRange(8, 8);
 170                 break;
 171             case 'city':
 172                 $this->setRankRange(14, 16);
 173                 break;
 174             case 'settlement':
 175                 $this->setRankRange(8, 20);
 176                 break;
 177         }
 178     }
 179
 180     public function setRankRange($iMin, $iMax)
 181     {
 182         $this->iMinAddressRank = $iMin;
 183         $this->iMaxAddressRank = $iMax;
 184     }
 185
 186     public function setRoute($aRoutePoints, $fRouteWidth)
 187     {
 188         $this->aViewBox = false;
 189
 190         $this->sViewboxCentreSQL = "ST_SetSRID('LINESTRING(";
 191         $sSep = '';
 192         foreach ($aRoutePoints as $aPoint) {
 193             $fPoint = (float)$aPoint;
 194             $this->sViewboxCentreSQL .= $sSep.$fPoint;
 195             $sSep = ($sSep == ' ') ? ',' : ' ';
 196         }
 197         $this->sViewboxCentreSQL .= ")'::geometry,4326)";
 198
 199         $this->sViewboxSmallSQL = 'ST_BUFFER('.$this->sViewboxCentreSQL;
 200         $this->sViewboxSmallSQL .= ','.($fRouteWidth/69).')';
 201
 202         $this->sViewboxLargeSQL = 'ST_BUFFER('.$this->sViewboxCentreSQL;
 203         $this->sViewboxLargeSQL .= ','.($fRouteWidth/30).')';
 204     }
 205
 206     public function setViewbox($aViewbox)
 207     {
 208         $this->aViewBox = array_map('floatval', $aViewbox);
 209
 210         $this->aViewBox[0] = max(-180.0, min(180, $this->aViewBox[0]));
 211         $this->aViewBox[1] = max(-90.0, min(90, $this->aViewBox[1]));
 212         $this->aViewBox[2] = max(-180.0, min(180, $this->aViewBox[2]));
 213         $this->aViewBox[3] = max(-90.0, min(90, $this->aViewBox[3]));
 214
 215         if (abs($this->aViewBox[0] - $this->aViewBox[2]) < 0.000000001
 216             || abs($this->aViewBox[1] - $this->aViewBox[3]) < 0.000000001
 217         ) {
 218             userError("Bad parameter 'viewbox'. Not a box.");
 219         }
 220
 221         $fHeight = $this->aViewBox[0] - $this->aViewBox[2];
 222         $fWidth = $this->aViewBox[1] - $this->aViewBox[3];
 223         $aBigViewBox[0] = $this->aViewBox[0] + $fHeight;
 224         $aBigViewBox[2] = $this->aViewBox[2] - $fHeight;
 225         $aBigViewBox[1] = $this->aViewBox[1] + $fWidth;
 226         $aBigViewBox[3] = $this->aViewBox[3] - $fWidth;
 227
 228         $this->sViewboxCentreSQL = false;
 229         $this->sViewboxSmallSQL = sprintf(
 230             'ST_SetSRID(ST_MakeBox2D(ST_Point(%F,%F),ST_Point(%F,%F)),4326)',
 231             $this->aViewBox[0],
 232             $this->aViewBox[1],
 233             $this->aViewBox[2],
 234             $this->aViewBox[3]
 235         );
 236         $this->sViewboxLargeSQL = sprintf(
 237             'ST_SetSRID(ST_MakeBox2D(ST_Point(%F,%F),ST_Point(%F,%F)),4326)',
 238             $aBigViewBox[0],
 239             $aBigViewBox[1],
 240             $aBigViewBox[2],
 241             $aBigViewBox[3]
 242         );
 243     }
 244
 245     public function setQuery($sQueryString)
 246     {
 247         $this->sQuery = $sQueryString;
 248         $this->aStructuredQuery = false;
 249     }
 250
 251     public function getQueryString()
 252     {
 253         return $this->sQuery;
 254     }
 255
 256
 257     public function loadParamArray($oParams)
 258     {
 259         $this->bIncludeAddressDetails
 260          = $oParams->getBool('addressdetails', $this->bIncludeAddressDetails);
 261         $this->bIncludeExtraTags
 262          = $oParams->getBool('extratags', $this->bIncludeExtraTags);
 263         $this->bIncludeNameDetails
 264          = $oParams->getBool('namedetails', $this->bIncludeNameDetails);
 265
 266         $this->bBoundedSearch = $oParams->getBool('bounded', $this->bBoundedSearch);
 267         $this->bDeDupe = $oParams->getBool('dedupe', $this->bDeDupe);
 268
 269         $this->setLimit($oParams->getInt('limit', $this->iFinalLimit));
 270         $this->iOffset = $oParams->getInt('offset', $this->iOffset);
 271
 272         $this->bFallback = $oParams->getBool('fallback', $this->bFallback);
 273
 274         // List of excluded Place IDs - used for more acurate pageing
 275         $sExcluded = $oParams->getStringList('exclude_place_ids');
 276         if ($sExcluded) {
 277             foreach ($sExcluded as $iExcludedPlaceID) {
 278                 $iExcludedPlaceID = (int)$iExcludedPlaceID;
 279                 if ($iExcludedPlaceID)
 280                     $aExcludePlaceIDs[$iExcludedPlaceID] = $iExcludedPlaceID;
 281             }
 282
 283             if (isset($aExcludePlaceIDs))
 284                 $this->aExcludePlaceIDs = $aExcludePlaceIDs;
 285         }
 286
 287         // Only certain ranks of feature
 288         $sFeatureType = $oParams->getString('featureType');
 289         if (!$sFeatureType) $sFeatureType = $oParams->getString('featuretype');
 290         if ($sFeatureType) $this->setFeatureType($sFeatureType);
 291
 292         // Country code list
 293         $sCountries = $oParams->getStringList('countrycodes');
 294         if ($sCountries) {
 295             foreach ($sCountries as $sCountryCode) {
 296                 if (preg_match('/^[a-zA-Z][a-zA-Z]$/', $sCountryCode)) {
 297                     $aCountries[] = strtolower($sCountryCode);
 298                 }
 299             }
 300             if (isset($aCountries))
 301                 $this->aCountryCodes = $aCountries;
 302         }
 303
 304         $aViewbox = $oParams->getStringList('viewboxlbrt');
 305         if ($aViewbox) {
 306             if (count($aViewbox) != 4) {
 307                 userError("Bad parmater 'viewbox'. Expected 4 coordinates.");
 308             }
 309             $this->setViewbox($aViewbox);
 310         } else {
 311             $aViewbox = $oParams->getStringList('viewbox');
 312             if ($aViewbox) {
 313                 if (count($aViewbox) != 4) {
 314                     userError("Bad parmater 'viewbox'. Expected 4 coordinates.");
 315                 }
 316                 $this->setViewBox(array(
 317                                    $aViewbox[0],
 318                                    $aViewbox[3],
 319                                    $aViewbox[2],
 320                                    $aViewbox[1]
 321                                   ));
 322             } else {
 323                 $aRoute = $oParams->getStringList('route');
 324                 $fRouteWidth = $oParams->getFloat('routewidth');
 325                 if ($aRoute && $fRouteWidth) {
 326                     $this->setRoute($aRoute, $fRouteWidth);
 327                 }
 328             }
 329         }
 330     }
 331
 332     public function setQueryFromParams($oParams)
 333     {
 334         // Search query
 335         $sQuery = $oParams->getString('q');
 336         if (!$sQuery) {
 337             $this->setStructuredQuery(
 338                 $oParams->getString('amenity'),
 339                 $oParams->getString('street'),
 340                 $oParams->getString('city'),
 341                 $oParams->getString('county'),
 342                 $oParams->getString('state'),
 343                 $oParams->getString('country'),
 344                 $oParams->getString('postalcode')
 345             );
 346             $this->setReverseInPlan(false);
 347         } else {
 348             $this->setQuery($sQuery);
 349         }
 350     }
 351
 352     public function loadStructuredAddressElement($sValue, $sKey, $iNewMinAddressRank, $iNewMaxAddressRank, $aItemListValues)
 353     {
 354         $sValue = trim($sValue);
 355         if (!$sValue) return false;
 356         $this->aStructuredQuery[$sKey] = $sValue;
 357         if ($this->iMinAddressRank == 0 && $this->iMaxAddressRank == 30) {
 358             $this->iMinAddressRank = $iNewMinAddressRank;
 359             $this->iMaxAddressRank = $iNewMaxAddressRank;
 360         }
 361         if ($aItemListValues) $this->aAddressRankList = array_merge($this->aAddressRankList, $aItemListValues);
 362         return true;
 363     }
 364
 365     public function setStructuredQuery($sAmenity = false, $sStreet = false, $sCity = false, $sCounty = false, $sState = false, $sCountry = false, $sPostalCode = false)
 366     {
 367         $this->sQuery = false;
 368
 369         // Reset
 370         $this->iMinAddressRank = 0;
 371         $this->iMaxAddressRank = 30;
 372         $this->aAddressRankList = array();
 373
 374         $this->aStructuredQuery = array();
 375         $this->sAllowedTypesSQLList = '';
 376
 377         $this->loadStructuredAddressElement($sAmenity, 'amenity', 26, 30, false);
 378         $this->loadStructuredAddressElement($sStreet, 'street', 26, 30, false);
 379         $this->loadStructuredAddressElement($sCity, 'city', 14, 24, false);
 380         $this->loadStructuredAddressElement($sCounty, 'county', 9, 13, false);
 381         $this->loadStructuredAddressElement($sState, 'state', 8, 8, false);
 382         $this->loadStructuredAddressElement($sPostalCode, 'postalcode', 5, 11, array(5, 11));
 383         $this->loadStructuredAddressElement($sCountry, 'country', 4, 4, false);
 384
 385         if (sizeof($this->aStructuredQuery) > 0) {
 386             $this->sQuery = join(', ', $this->aStructuredQuery);
 387             if ($this->iMaxAddressRank < 30) {
 388                 $sAllowedTypesSQLList = '(\'place\',\'boundary\')';
 389             }
 390         }
 391     }
 392
 393     public function fallbackStructuredQuery()
 394     {
 395         if (!$this->aStructuredQuery) return false;
 396
 397         $aParams = $this->aStructuredQuery;
 398
 399         if (sizeof($aParams) == 1) return false;
 400
 401         $aOrderToFallback = array('postalcode', 'street', 'city', 'county', 'state');
 402
 403         foreach ($aOrderToFallback as $sType) {
 404             if (isset($aParams[$sType])) {
 405                 unset($aParams[$sType]);
 406                 $this->setStructuredQuery(@$aParams['amenity'], @$aParams['street'], @$aParams['city'], @$aParams['county'], @$aParams['state'], @$aParams['country'], @$aParams['postalcode']);
 407                 return true;
 408             }
 409         }
 410
 411         return false;
 412     }
 413
 414     public function getDetails($aPlaceIDs)
 415     {
 416         //$aPlaceIDs is an array with key: placeID and value: tiger-housenumber, if found, else -1
 417         if (sizeof($aPlaceIDs) == 0) return array();
 418
 419         $sLanguagePrefArraySQL = "ARRAY[".join(',', array_map("getDBQuoted", $this->aLangPrefOrder))."]";
 420
 421         // Get the details for display (is this a redundant extra step?)
 422         $sPlaceIDs = join(',', array_keys($aPlaceIDs));
 423
 424         $sImportanceSQL = '';
 425         $sImportanceSQLGeom = '';
 426         if ($this->sViewboxSmallSQL) {
 427             $sImportanceSQL .= " CASE WHEN ST_Contains($this->sViewboxSmallSQL, ST_Collect(centroid)) THEN 1 ELSE 0.75 END * ";
 428             $sImportanceSQLGeom .= " CASE WHEN ST_Contains($this->sViewboxSmallSQL, geometry) THEN 1 ELSE 0.75 END * ";
 429         }
 430         if ($this->sViewboxLargeSQL) {
 431             $sImportanceSQL .= " CASE WHEN ST_Contains($this->sViewboxLargeSQL, ST_Collect(centroid)) THEN 1 ELSE 0.75 END * ";
 432             $sImportanceSQLGeom .= " CASE WHEN ST_Contains($this->sViewboxLargeSQL, geometry) THEN 1 ELSE 0.75 END * ";
 433         }
 434
 435         $sSQL  = "SELECT ";
 436         $sSQL .= "    osm_type,";
 437         $sSQL .= "    osm_id,";
 438         $sSQL .= "    class,";
 439         $sSQL .= "    type,";
 440         $sSQL .= "    admin_level,";
 441         $sSQL .= "    rank_search,";
 442         $sSQL .= "    rank_address,";
 443         $sSQL .= "    min(place_id) AS place_id, ";
 444         $sSQL .= "    min(parent_place_id) AS parent_place_id, ";
 445         $sSQL .= "    country_code, ";
 446         $sSQL .= "    get_address_by_language(place_id, -1, $sLanguagePrefArraySQL) AS langaddress,";
 447         $sSQL .= "    get_name_by_language(name, $sLanguagePrefArraySQL) AS placename,";
 448         $sSQL .= "    get_name_by_language(name, ARRAY['ref']) AS ref,";
 449         if ($this->bIncludeExtraTags) $sSQL .= "hstore_to_json(extratags)::text AS extra,";
 450         if ($this->bIncludeNameDetails) $sSQL .= "hstore_to_json(name)::text AS names,";
 451         $sSQL .= "    avg(ST_X(centroid)) AS lon, ";
 452         $sSQL .= "    avg(ST_Y(centroid)) AS lat, ";
 453         $sSQL .= "    ".$sImportanceSQL."COALESCE(importance,0.75-(rank_search::float/40)) AS importance, ";
 454         $sSQL .= "    ( ";
 455         $sSQL .= "       SELECT max(p.importance*(p.rank_address+2))";
 456         $sSQL .= "       FROM ";
 457         $sSQL .= "         place_addressline s, ";
 458         $sSQL .= "         placex p";
 459         $sSQL .= "       WHERE s.place_id = min(CASE WHEN placex.rank_search < 28 THEN placex.place_id ELSE placex.parent_place_id END)";
 460         $sSQL .= "         AND p.place_id = s.address_place_id ";
 461         $sSQL .= "         AND s.isaddress ";
 462         $sSQL .= "         AND p.importance is not null ";
 463         $sSQL .= "    ) AS addressimportance, ";
 464         $sSQL .= "    (extratags->'place') AS extra_place ";
 465         $sSQL .= " FROM placex";
 466         $sSQL .= " WHERE place_id in ($sPlaceIDs) ";
 467         $sSQL .= "   AND (";
 468         $sSQL .= "            placex.rank_address between $this->iMinAddressRank and $this->iMaxAddressRank ";
 469         if (14 >= $this->iMinAddressRank && 14 <= $this->iMaxAddressRank) {
 470             $sSQL .= "        OR (extratags->'place') = 'city'";
 471         }
 472         if ($this->aAddressRankList) {
 473             $sSQL .= "        OR placex.rank_address in (".join(',', $this->aAddressRankList).")";
 474         }
 475         $sSQL .= "       ) ";
 476         if ($this->sAllowedTypesSQLList) {
 477             $sSQL .= "AND placex.class in $this->sAllowedTypesSQLList ";
 478         }
 479         $sSQL .= "    AND linked_place_id is null ";
 480         $sSQL .= " GROUP BY ";
 481         $sSQL .= "     osm_type, ";
 482         $sSQL .= "     osm_id, ";
 483         $sSQL .= "     class, ";
 484         $sSQL .= "     type, ";
 485         $sSQL .= "     admin_level, ";
 486         $sSQL .= "     rank_search, ";
 487         $sSQL .= "     rank_address, ";
 488         $sSQL .= "     country_code, ";
 489         $sSQL .= "     importance, ";
 490         if (!$this->bDeDupe) $sSQL .= "place_id,";
 491         $sSQL .= "     langaddress, ";
 492         $sSQL .= "     placename, ";
 493         $sSQL .= "     ref, ";
 494         if ($this->bIncludeExtraTags) $sSQL .= "extratags, ";
 495         if ($this->bIncludeNameDetails) $sSQL .= "name, ";
 496         $sSQL .= "     extratags->'place' ";
 497
 498         // postcode table
 499         $sSQL .= "UNION ";
 500         $sSQL .= "SELECT";
 501         $sSQL .= "  'P' as osm_type,";
 502         $sSQL .= "  (SELECT osm_id from placex p WHERE p.place_id = parent_place_id) as osm_id,";
 503         $sSQL .= "  'place' as class, 'postcode' as type,";
 504         $sSQL .= "  null as admin_level, rank_search, rank_address,";
 505         $sSQL .= "  place_id, parent_place_id, country_code,";
 506         $sSQL .= "  get_address_by_language(place_id, -1, $sLanguagePrefArraySQL) AS langaddress,";
 507         $sSQL .= "  postcode as placename,";
 508         $sSQL .= "  postcode as ref,";
 509         if ($this->bIncludeExtraTags) $sSQL .= "null AS extra,";
 510         if ($this->bIncludeNameDetails) $sSQL .= "null AS names,";
 511         $sSQL .= "  ST_x(st_centroid(geometry)) AS lon, ST_y(st_centroid(geometry)) AS lat,";
 512         $sSQL .=    $sImportanceSQLGeom."(0.75-(rank_search::float/40)) AS importance, ";
 513         $sSQL .= "  (";
 514         $sSQL .= "     SELECT max(p.importance*(p.rank_address+2))";
 515         $sSQL .= "     FROM ";
 516         $sSQL .= "       place_addressline s, ";
 517         $sSQL .= "       placex p";
 518         $sSQL .= "     WHERE s.place_id = parent_place_id";
 519         $sSQL .= "       AND p.place_id = s.address_place_id ";
 520         $sSQL .= "       AND s.isaddress";
 521         $sSQL .= "       AND p.importance is not null";
 522         $sSQL .= "  ) AS addressimportance, ";
 523         $sSQL .= "  null AS extra_place ";
 524         $sSQL .= "FROM location_postcode";
 525         $sSQL .= " WHERE place_id in ($sPlaceIDs) ";
 526
 527         if (30 >= $this->iMinAddressRank && 30 <= $this->iMaxAddressRank) {
 528             // only Tiger housenumbers and interpolation lines need to be interpolated, because they are saved as lines
 529             // with start- and endnumber, the common osm housenumbers are usually saved as points
 530             $sHousenumbers = "";
 531             $i = 0;
 532             $length = count($aPlaceIDs);
 533             foreach ($aPlaceIDs as $placeID => $housenumber) {
 534                 $i++;
 535                 $sHousenumbers .= "(".$placeID.", ".$housenumber.")";
 536                 if ($i<$length) $sHousenumbers .= ", ";
 537             }
 538
 539             if (CONST_Use_US_Tiger_Data) {
 540                 // Tiger search only if a housenumber was searched and if it was found (i.e. aPlaceIDs[placeID] = housenumber != -1) (realized through a join)
 541                 $sSQL .= " union";
 542                 $sSQL .= " SELECT ";
 543                 $sSQL .= "     'T' AS osm_type, ";
 544                 $sSQL .= "     (SELECT osm_id from placex p WHERE p.place_id=min(blub.parent_place_id)) as osm_id, ";
 545                 $sSQL .= "     'place' AS class, ";
 546                 $sSQL .= "     'house' AS type, ";
 547                 $sSQL .= "     null AS admin_level, ";
 548                 $sSQL .= "     30 AS rank_search, ";
 549                 $sSQL .= "     30 AS rank_address, ";
 550                 $sSQL .= "     min(place_id) AS place_id, ";
 551                 $sSQL .= "     min(parent_place_id) AS parent_place_id, ";
 552                 $sSQL .= "     'us' AS country_code, ";
 553                 $sSQL .= "     get_address_by_language(place_id, housenumber_for_place, $sLanguagePrefArraySQL) AS langaddress,";
 554                 $sSQL .= "     null AS placename, ";
 555                 $sSQL .= "     null AS ref, ";
 556                 if ($this->bIncludeExtraTags) $sSQL .= "null AS extra,";
 557                 if ($this->bIncludeNameDetails) $sSQL .= "null AS names,";
 558                 $sSQL .= "     avg(st_x(centroid)) AS lon, ";
 559                 $sSQL .= "     avg(st_y(centroid)) AS lat,";
 560                 $sSQL .= "     ".$sImportanceSQL."-1.15 AS importance, ";
 561                 $sSQL .= "     (";
 562                 $sSQL .= "        SELECT max(p.importance*(p.rank_address+2))";
 563                 $sSQL .= "        FROM ";
 564                 $sSQL .= "          place_addressline s, ";
 565                 $sSQL .= "          placex p";
 566                 $sSQL .= "        WHERE s.place_id = min(blub.parent_place_id)";
 567                 $sSQL .= "          AND p.place_id = s.address_place_id ";
 568                 $sSQL .= "          AND s.isaddress";
 569                 $sSQL .= "          AND p.importance is not null";
 570                 $sSQL .= "     ) AS addressimportance, ";
 571                 $sSQL .= "     null AS extra_place ";
 572                 $sSQL .= " FROM (";
 573                 $sSQL .= "     SELECT place_id, ";    // interpolate the Tiger housenumbers here
 574                 $sSQL .= "         ST_LineInterpolatePoint(linegeo, (housenumber_for_place-startnumber::float)/(endnumber-startnumber)::float) AS centroid, ";
 575                 $sSQL .= "         parent_place_id, ";
 576                 $sSQL .= "         housenumber_for_place";
 577                 $sSQL .= "     FROM (";
 578                 $sSQL .= "            location_property_tiger ";
 579                 $sSQL .= "            JOIN (values ".$sHousenumbers.") AS housenumbers(place_id, housenumber_for_place) USING(place_id)) ";
 580                 $sSQL .= "     WHERE ";
 581                 $sSQL .= "         housenumber_for_place>=0";
 582                 $sSQL .= "         AND 30 between $this->iMinAddressRank AND $this->iMaxAddressRank";
 583                 $sSQL .= " ) AS blub"; //postgres wants an alias here
 584                 $sSQL .= " GROUP BY";
 585                 $sSQL .= "      place_id, ";
 586                 $sSQL .= "      housenumber_for_place"; //is this group by really needed?, place_id + housenumber (in combination) are unique
 587                 if (!$this->bDeDupe) $sSQL .= ", place_id ";
 588             }
 589             // osmline
 590             // interpolation line search only if a housenumber was searched and if it was found (i.e. aPlaceIDs[placeID] = housenumber != -1) (realized through a join)
 591             $sSQL .= " UNION ";
 592             $sSQL .= "SELECT ";
 593             $sSQL .= "  'W' AS osm_type, ";
 594             $sSQL .= "  osm_id, ";
 595             $sSQL .= "  'place' AS class, ";
 596             $sSQL .= "  'house' AS type, ";
 597             $sSQL .= "  null AS admin_level, ";
 598             $sSQL .= "  30 AS rank_search, ";
 599             $sSQL .= "  30 AS rank_address, ";
 600             $sSQL .= "  min(place_id) as place_id, ";
 601             $sSQL .= "  min(parent_place_id) AS parent_place_id, ";
 602             $sSQL .= "  country_code, ";
 603             $sSQL .= "  get_address_by_language(place_id, housenumber_for_place, $sLanguagePrefArraySQL) AS langaddress, ";
 604             $sSQL .= "  null AS placename, ";
 605             $sSQL .= "  null AS ref, ";
 606             if ($this->bIncludeExtraTags) $sSQL .= "null AS extra, ";
 607             if ($this->bIncludeNameDetails) $sSQL .= "null AS names, ";
 608             $sSQL .= "  AVG(st_x(centroid)) AS lon, ";
 609             $sSQL .= "  AVG(st_y(centroid)) AS lat, ";
 610             $sSQL .= "  ".$sImportanceSQL."-0.1 AS importance, ";  // slightly smaller than the importance for normal houses with rank 30, which is 0
 611             $sSQL .= "  (";
 612             $sSQL .= "     SELECT ";
 613             $sSQL .= "       MAX(p.importance*(p.rank_address+2)) ";
 614             $sSQL .= "     FROM";
 615             $sSQL .= "       place_addressline s, ";
 616             $sSQL .= "       placex p";
 617             $sSQL .= "     WHERE s.place_id = min(blub.parent_place_id) ";
 618             $sSQL .= "       AND p.place_id = s.address_place_id ";
 619             $sSQL .= "       AND s.isaddress ";
 620             $sSQL .= "       AND p.importance is not null";
 621             $sSQL .= "  ) AS addressimportance,";
 622             $sSQL .= "  null AS extra_place ";
 623             $sSQL .= "  FROM (";
 624             $sSQL .= "     SELECT ";
 625             $sSQL .= "         osm_id, ";
 626             $sSQL .= "         place_id, ";
 627             $sSQL .= "         country_code, ";
 628             $sSQL .= "         CASE ";             // interpolate the housenumbers here
 629             $sSQL .= "           WHEN startnumber != endnumber ";
 630             $sSQL .= "           THEN ST_LineInterpolatePoint(linegeo, (housenumber_for_place-startnumber::float)/(endnumber-startnumber)::float) ";
 631             $sSQL .= "           ELSE ST_LineInterpolatePoint(linegeo, 0.5) ";
 632             $sSQL .= "         END as centroid, ";
 633             $sSQL .= "         parent_place_id, ";
 634             $sSQL .= "         housenumber_for_place ";
 635             $sSQL .= "     FROM (";
 636             $sSQL .= "            location_property_osmline ";
 637             $sSQL .= "            JOIN (values ".$sHousenumbers.") AS housenumbers(place_id, housenumber_for_place) USING(place_id)";
 638             $sSQL .= "          ) ";
 639             $sSQL .= "     WHERE housenumber_for_place>=0 ";
 640             $sSQL .= "       AND 30 between $this->iMinAddressRank AND $this->iMaxAddressRank";
 641             $sSQL .= "  ) as blub"; //postgres wants an alias here
 642             $sSQL .= "  GROUP BY ";
 643             $sSQL .= "    osm_id, ";
 644             $sSQL .= "    place_id, ";
 645             $sSQL .= "    housenumber_for_place, ";
 646             $sSQL .= "    country_code "; //is this group by really needed?, place_id + housenumber (in combination) are unique
 647             if (!$this->bDeDupe) $sSQL .= ", place_id ";
 648
 649             if (CONST_Use_Aux_Location_data) {
 650                 $sSQL .= " UNION ";
 651                 $sSQL .= "  SELECT ";
 652                 $sSQL .= "     'L' AS osm_type, ";
 653                 $sSQL .= "     place_id AS osm_id, ";
 654                 $sSQL .= "     'place' AS class,";
 655                 $sSQL .= "     'house' AS type, ";
 656                 $sSQL .= "     null AS admin_level, ";
 657                 $sSQL .= "     0 AS rank_search,";
 658                 $sSQL .= "     0 AS rank_address, ";
 659                 $sSQL .= "     min(place_id) AS place_id,";
 660                 $sSQL .= "     min(parent_place_id) AS parent_place_id, ";
 661                 $sSQL .= "     'us' AS country_code, ";
 662                 $sSQL .= "     get_address_by_language(place_id, -1, $sLanguagePrefArraySQL) AS langaddress, ";
 663                 $sSQL .= "     null AS placename, ";
 664                 $sSQL .= "     null AS ref, ";
 665                 if ($this->bIncludeExtraTags) $sSQL .= "null AS extra, ";
 666                 if ($this->bIncludeNameDetails) $sSQL .= "null AS names, ";
 667                 $sSQL .= "     avg(ST_X(centroid)) AS lon, ";
 668                 $sSQL .= "     avg(ST_Y(centroid)) AS lat, ";
 669                 $sSQL .= "     ".$sImportanceSQL."-1.10 AS importance, ";
 670                 $sSQL .= "     ( ";
 671                 $sSQL .= "       SELECT max(p.importance*(p.rank_address+2))";
 672                 $sSQL .= "       FROM ";
 673                 $sSQL .= "          place_addressline s, ";
 674                 $sSQL .= "          placex p";
 675                 $sSQL .= "       WHERE s.place_id = min(location_property_aux.parent_place_id)";
 676                 $sSQL .= "         AND p.place_id = s.address_place_id ";
 677                 $sSQL .= "         AND s.isaddress";
 678                 $sSQL .= "         AND p.importance is not null";
 679                 $sSQL .= "     ) AS addressimportance, ";
 680                 $sSQL .= "     null AS extra_place ";
 681                 $sSQL .= "  FROM location_property_aux ";
 682                 $sSQL .= "  WHERE place_id in ($sPlaceIDs) ";
 683                 $sSQL .= "    AND 30 between $this->iMinAddressRank and $this->iMaxAddressRank ";
 684                 $sSQL .= "  GROUP BY ";
 685                 $sSQL .= "     place_id, ";
 686                 if (!$this->bDeDupe) $sSQL .= "place_id, ";
 687                 $sSQL .= "     get_address_by_language(place_id, -1, $sLanguagePrefArraySQL) ";
 688             }
 689         }
 690
 691         $sSQL .= " order by importance desc";
 692         if (CONST_Debug) {
 693             echo "<hr>";
 694             var_dump($sSQL);
 695         }
 696         $aSearchResults = chksql(
 697             $this->oDB->getAll($sSQL),
 698             "Could not get details for place."
 699         );
 700
 701         return $aSearchResults;
 702     }
 703
 704     public function getGroupedSearches($aSearches, $aPhraseTypes, $aPhrases, $aValidTokens, $aWordFrequencyScores, $bStructuredPhrases, $sNormQuery)
 705     {
 706         /*
 707              Calculate all searches using aValidTokens i.e.
 708              'Wodsworth Road, Sheffield' =>
 709
 710              Phrase Wordset
 711              0      0       (wodsworth road)
 712              0      1       (wodsworth)(road)
 713              1      0       (sheffield)
 714
 715              Score how good the search is so they can be ordered
 716          */
 717         foreach ($aPhrases as $iPhrase => $aPhrase) {
 718             $aNewPhraseSearches = array();
 719             if ($bStructuredPhrases) $sPhraseType = $aPhraseTypes[$iPhrase];
 720             else $sPhraseType = '';
 721
 722             foreach ($aPhrase['wordsets'] as $iWordSet => $aWordset) {
 723                 // Too many permutations - too expensive
 724                 if ($iWordSet > 120) break;
 725
 726                 $aWordsetSearches = $aSearches;
 727
 728                 // Add all words from this wordset
 729                 foreach ($aWordset as $iToken => $sToken) {
 730                     //echo "<br><b>$sToken</b>";
 731                     $aNewWordsetSearches = array();
 732
 733                     foreach ($aWordsetSearches as $aCurrentSearch) {
 734                         //echo "<i>";
 735                         //var_dump($aCurrentSearch);
 736                         //echo "</i>";
 737
 738                         // If the token is valid
 739                         if (isset($aValidTokens[' '.$sToken])) {
 740                             foreach ($aValidTokens[' '.$sToken] as $aSearchTerm) {
 741                                 $aSearch = $aCurrentSearch;
 742                                 $aSearch['iSearchRank']++;
 743                                 if (($sPhraseType == '' || $sPhraseType == 'country') && !empty($aSearchTerm['country_code']) && $aSearchTerm['country_code'] != '0') {
 744                                     if ($aSearch['sCountryCode'] === false) {
 745                                         $aSearch['sCountryCode'] = strtolower($aSearchTerm['country_code']);
 746                                         // Country is almost always at the end of the string - increase score for finding it anywhere else (optimisation)
 747                                         if (($iToken+1 != sizeof($aWordset) || $iPhrase+1 != sizeof($aPhrases))) {
 748                                             $aSearch['iSearchRank'] += 5;
 749                                         }
 750                                         if ($aSearch['iSearchRank'] < $this->iMaxRank) $aNewWordsetSearches[] = $aSearch;
 751                                     }
 752                                 } elseif ($sPhraseType == 'postalcode' || ($aSearchTerm['class'] == 'place' && $aSearchTerm['type'] == 'postcode')) {
 753                                     // We need to try the case where the postal code is the primary element (i.e. no way to tell if it is (postalcode, city) OR (city, postalcode) so try both
 754                                     if ($aSearch['sPostcode'] === '' &&
 755                                         isset($aSearchTerm['word_id']) && $aSearchTerm['word_id'] && strpos($sNormQuery, $this->normTerm($aSearchTerm['word'])) !== false) {
 756                                         // If we have structured search or this is the first term,
 757                                         // make the postcode the primary search element.
 758                                         if ($aSearch['sOperator'] === '' && ($sPhraseType == 'postalcode' || ($iToken == 0 && $iPhrase == 0))) {
 759                                             $aNewSearch = $aSearch;
 760                                             $aNewSearch['sOperator'] = 'postcode';
 761                                             $aNewSearch['aAddress'] = array_merge($aNewSearch['aAddress'], $aNewSearch['aName']);
 762                                             $aNewSearch['aName'][$aSearchTerm['word_id']] = $aSearchTerm['word'];
 763                                             if ($aSearch['iSearchRank'] < $this->iMaxRank) $aNewWordsetSearches[] = $aNewSearch;
 764                                         }
 765
 766                                         // If we have a structured search or this is not the first term,
 767                                         // add the postcode as an addendum.
 768                                         if ($sPhraseType == 'postalcode' || sizeof($aSearch['aName'])) {
 769                                             $aSearch['sPostcode'] = $aSearchTerm['word'];
 770                                             if ($aSearch['iSearchRank'] < $this->iMaxRank) $aNewWordsetSearches[] = $aSearch;
 771                                         }
 772                                     }
 773                                 } elseif (($sPhraseType == '' || $sPhraseType == 'street') && $aSearchTerm['class'] == 'place' && $aSearchTerm['type'] == 'house') {
 774                                     if ($aSearch['sHouseNumber'] === '') {
 775                                         $aSearch['sHouseNumber'] = $sToken;
 776                                         // sanity check: if the housenumber is not mainly made
 777                                         // up of numbers, add a penalty
 778                                         if (preg_match_all("/[^0-9]/", $sToken, $aMatches) > 2) $aSearch['iSearchRank']++;
 779                                         // also housenumbers should appear in the first or second phrase
 780                                         if ($iPhrase > 1) $aSearch['iSearchRank'] += 1;
 781                                         if ($aSearch['iSearchRank'] < $this->iMaxRank) $aNewWordsetSearches[] = $aSearch;
 782                                         /*
 783                                         // Fall back to not searching for this item (better than nothing)
 784                                         $aSearch = $aCurrentSearch;
 785                                         $aSearch['iSearchRank'] += 1;
 786                                         if ($aSearch['iSearchRank'] < $this->iMaxRank) $aNewWordsetSearches[] = $aSearch;
 787                                          */
 788                                     }
 789                                 } elseif ($sPhraseType == '' && $aSearchTerm['class'] !== '' && $aSearchTerm['class'] !== null) {
 790                                     // require a normalized exact match of the term
 791                                     // if we have the normalizer version of the query
 792                                     // available
 793                                     if ($aSearch['sClass'] === ''
 794                                         && ($sNormQuery === null || !($aSearchTerm['word'] && strpos($sNormQuery, $aSearchTerm['word']) === false))) {
 795                                         $aSearch['sClass'] = $aSearchTerm['class'];
 796                                         $aSearch['sType'] = $aSearchTerm['type'];
 797                                         if ($aSearchTerm['operator'] == '') {
 798                                             $aSearch['sOperator'] = sizeof($aSearch['aName']) ? 'name' :  'near';
 799                                             $aSearch['iSearchRank'] += 2;
 800                                         } else {
 801                                             $aSearch['sOperator'] = 'near'; // near = in for the moment
 802                                         }
 803
 804                                         if ($aSearch['iSearchRank'] < $this->iMaxRank) $aNewWordsetSearches[] = $aSearch;
 805                                     }
 806                                 } elseif (isset($aSearchTerm['word_id']) && $aSearchTerm['word_id']) {
 807                                     if (sizeof($aSearch['aName'])) {
 808                                         if ((!$bStructuredPhrases || $iPhrase > 0) && $sPhraseType != 'country' && (!isset($aValidTokens[$sToken]) || strpos($sToken, ' ') !== false)) {
 809                                             $aSearch['aAddress'][$aSearchTerm['word_id']] = $aSearchTerm['word_id'];
 810                                         } else {
 811                                             $aCurrentSearch['aFullNameAddress'][$aSearchTerm['word_id']] = $aSearchTerm['word_id'];
 812                                             $aSearch['iSearchRank'] += 1000; // skip;
 813                                         }
 814                                     } else {
 815                                         $aSearch['aName'][$aSearchTerm['word_id']] = $aSearchTerm['word_id'];
 816                                         //$aSearch['iNamePhrase'] = $iPhrase;
 817                                     }
 818                                     if ($aSearch['iSearchRank'] < $this->iMaxRank) $aNewWordsetSearches[] = $aSearch;
 819                                 }
 820                             }
 821                         }
 822                         // Look for partial matches.
 823                         // Note that there is no point in adding country terms here
 824                         // because country are omitted in the address.
 825                         if (isset($aValidTokens[$sToken]) && $sPhraseType != 'country') {
 826                             // Allow searching for a word - but at extra cost
 827                             foreach ($aValidTokens[$sToken] as $aSearchTerm) {
 828                                 if (isset($aSearchTerm['word_id']) && $aSearchTerm['word_id']) {
 829                                     if ((!$bStructuredPhrases || $iPhrase > 0) && sizeof($aCurrentSearch['aName']) && strpos($sToken, ' ') === false) {
 830                                         $aSearch = $aCurrentSearch;
 831                                         $aSearch['iSearchRank'] += 1;
 832                                         if ($aWordFrequencyScores[$aSearchTerm['word_id']] < CONST_Max_Word_Frequency) {
 833                                             $aSearch['aAddress'][$aSearchTerm['word_id']] = $aSearchTerm['word_id'];
 834                                             if ($aSearch['iSearchRank'] < $this->iMaxRank) $aNewWordsetSearches[] = $aSearch;
 835                                         } elseif (isset($aValidTokens[' '.$sToken])) { // revert to the token version?
 836                                             $aSearch['aAddressNonSearch'][$aSearchTerm['word_id']] = $aSearchTerm['word_id'];
 837                                             $aSearch['iSearchRank'] += 1;
 838                                             if ($aSearch['iSearchRank'] < $this->iMaxRank) $aNewWordsetSearches[] = $aSearch;
 839                                             foreach ($aValidTokens[' '.$sToken] as $aSearchTermToken) {
 840                                                 if (empty($aSearchTermToken['country_code'])
 841                                                     && empty($aSearchTermToken['lat'])
 842                                                     && empty($aSearchTermToken['class'])
 843                                                 ) {
 844                                                     $aSearch = $aCurrentSearch;
 845                                                     $aSearch['iSearchRank'] += 1;
 846                                                     $aSearch['aAddress'][$aSearchTermToken['word_id']] = $aSearchTermToken['word_id'];
 847                                                     if ($aSearch['iSearchRank'] < $this->iMaxRank) $aNewWordsetSearches[] = $aSearch;
 848                                                 }
 849                                             }
 850                                         } else {
 851                                             $aSearch['aAddressNonSearch'][$aSearchTerm['word_id']] = $aSearchTerm['word_id'];
 852                                             if (preg_match('#^[0-9]+$#', $sToken)) $aSearch['iSearchRank'] += 2;
 853                                             if ($aSearch['iSearchRank'] < $this->iMaxRank) $aNewWordsetSearches[] = $aSearch;
 854                                         }
 855                                     }
 856
 857                                     if (!sizeof($aCurrentSearch['aName']) || $aCurrentSearch['iNamePhrase'] == $iPhrase) {
 858                                         $aSearch = $aCurrentSearch;
 859                                         $aSearch['iSearchRank'] += 1;
 860                                         if (!sizeof($aCurrentSearch['aName'])) $aSearch['iSearchRank'] += 1;
 861                                         if (preg_match('#^[0-9]+$#', $sToken)) $aSearch['iSearchRank'] += 2;
 862                                         if ($aWordFrequencyScores[$aSearchTerm['word_id']] < CONST_Max_Word_Frequency) {
 863                                             $aSearch['aName'][$aSearchTerm['word_id']] = $aSearchTerm['word_id'];
 864                                         } else {
 865                                             $aSearch['aNameNonSearch'][$aSearchTerm['word_id']] = $aSearchTerm['word_id'];
 866                                         }
 867                                         $aSearch['iNamePhrase'] = $iPhrase;
 868                                         if ($aSearch['iSearchRank'] < $this->iMaxRank) $aNewWordsetSearches[] = $aSearch;
 869                                     }
 870                                 }
 871                             }
 872                         } else {
 873                             // Allow skipping a word - but at EXTREAM cost
 874                             //$aSearch = $aCurrentSearch;
 875                             //$aSearch['iSearchRank']+=100;
 876                             //$aNewWordsetSearches[] = $aSearch;
 877                         }
 878                     }
 879                     // Sort and cut
 880                     usort($aNewWordsetSearches, 'bySearchRank');
 881                     $aWordsetSearches = array_slice($aNewWordsetSearches, 0, 50);
 882                 }
 883                 //var_Dump('<hr>',sizeof($aWordsetSearches)); exit;
 884
 885                 $aNewPhraseSearches = array_merge($aNewPhraseSearches, $aNewWordsetSearches);
 886                 usort($aNewPhraseSearches, 'bySearchRank');
 887
 888                 $aSearchHash = array();
 889                 foreach ($aNewPhraseSearches as $iSearch => $aSearch) {
 890                     $sHash = serialize($aSearch);
 891                     if (isset($aSearchHash[$sHash])) unset($aNewPhraseSearches[$iSearch]);
 892                     else $aSearchHash[$sHash] = 1;
 893                 }
 894
 895                 $aNewPhraseSearches = array_slice($aNewPhraseSearches, 0, 50);
 896             }
 897
 898             // Re-group the searches by their score, junk anything over 20 as just not worth trying
 899             $aGroupedSearches = array();
 900             foreach ($aNewPhraseSearches as $aSearch) {
 901                 if ($aSearch['iSearchRank'] < $this->iMaxRank) {
 902                     if (!isset($aGroupedSearches[$aSearch['iSearchRank']])) $aGroupedSearches[$aSearch['iSearchRank']] = array();
 903                     $aGroupedSearches[$aSearch['iSearchRank']][] = $aSearch;
 904                 }
 905             }
 906             ksort($aGroupedSearches);
 907
 908             $iSearchCount = 0;
 909             $aSearches = array();
 910             foreach ($aGroupedSearches as $iScore => $aNewSearches) {
 911                 $iSearchCount += sizeof($aNewSearches);
 912                 $aSearches = array_merge($aSearches, $aNewSearches);
 913                 if ($iSearchCount > 50) break;
 914             }
 915
 916             //if (CONST_Debug) _debugDumpGroupedSearches($aGroupedSearches, $aValidTokens);
 917         }
 918         return $aGroupedSearches;
 919     }
 920
 921     /* Perform the actual query lookup.
 922
 923         Returns an ordered list of results, each with the following fields:
 924             osm_type: type of corresponding OSM object
 925                         N - node
 926                         W - way
 927                         R - relation
 928                         P - postcode (internally computed)
 929             osm_id: id of corresponding OSM object
 930             class: general object class (corresponds to tag key of primary OSM tag)
 931             type: subclass of object (corresponds to tag value of primary OSM tag)
 932             admin_level: see http://wiki.openstreetmap.org/wiki/Admin_level
 933             rank_search: rank in search hierarchy
 934                         (see also http://wiki.openstreetmap.org/wiki/Nominatim/Development_overview#Country_to_street_level)
 935             rank_address: rank in address hierarchy (determines orer in address)
 936             place_id: internal key (may differ between different instances)
 937             country_code: ISO country code
 938             langaddress: localized full address
 939             placename: localized name of object
 940             ref: content of ref tag (if available)
 941             lon: longitude
 942             lat: latitude
 943             importance: importance of place based on Wikipedia link count
 944             addressimportance: cumulated importance of address elements
 945             extra_place: type of place (for admin boundaries, if there is a place tag)
 946             aBoundingBox: bounding Box
 947             label: short description of the object class/type (English only)
 948             name: full name (currently the same as langaddress)
 949             foundorder: secondary ordering for places with same importance
 950     */
 951
 952
 953     public function lookup()
 954     {
 955         if (!$this->sQuery && !$this->aStructuredQuery) return array();
 956
 957         $sNormQuery = $this->normTerm($this->sQuery);
 958         $sLanguagePrefArraySQL = "ARRAY[".join(',', array_map("getDBQuoted", $this->aLangPrefOrder))."]";
 959         $sCountryCodesSQL = false;
 960         if ($this->aCountryCodes) {
 961             $sCountryCodesSQL = join(',', array_map('addQuotes', $this->aCountryCodes));
 962         }
 963
 964         $sQuery = $this->sQuery;
 965         if (!preg_match('//u', $sQuery)) {
 966             userError("Query string is not UTF-8 encoded.");
 967         }
 968
 969         // Conflicts between US state abreviations and various words for 'the' in different languages
 970         if (isset($this->aLangPrefOrder['name:en'])) {
 971             $sQuery = preg_replace('/(^|,)\s*il\s*(,|$)/', '\1illinois\2', $sQuery);
 972             $sQuery = preg_replace('/(^|,)\s*al\s*(,|$)/', '\1alabama\2', $sQuery);
 973             $sQuery = preg_replace('/(^|,)\s*la\s*(,|$)/', '\1louisiana\2', $sQuery);
 974         }
 975
 976         $bBoundingBoxSearch = $this->bBoundedSearch && $this->sViewboxSmallSQL;
 977         if ($this->sViewboxCentreSQL) {
 978             // For complex viewboxes (routes) precompute the bounding geometry
 979             $sGeom = chksql(
 980                 $this->oDB->getOne("select ".$this->sViewboxSmallSQL),
 981                 "Could not get small viewbox"
 982             );
 983             $this->sViewboxSmallSQL = "'".$sGeom."'::geometry";
 984
 985             $sGeom = chksql(
 986                 $this->oDB->getOne("select ".$this->sViewboxLargeSQL),
 987                 "Could not get large viewbox"
 988             );
 989             $this->sViewboxLargeSQL = "'".$sGeom."'::geometry";
 990         }
 991
 992         // Do we have anything that looks like a lat/lon pair?
 993         $oNearPoint = false;
 994         if ($aLooksLike = NearPoint::extractFromQuery($sQuery)) {
 995             $oNearPoint = $aLooksLike['pt'];
 996             $sQuery = $aLooksLike['query'];
 997         }
 998
 999         $aSearchResults = array();
1000         if ($sQuery || $this->aStructuredQuery) {
1001             // Start with a blank search
1002             $aSearches = array(
1003                           array(
1004                            'iSearchRank' => 0,
1005                            'iNamePhrase' => -1,
1006                            'sCountryCode' => false,
1007                            'aName' => array(),
1008                            'aAddress' => array(),
1009                            'aFullNameAddress' => array(),
1010                            'aNameNonSearch' => array(),
1011                            'aAddressNonSearch' => array(),
1012                            'sOperator' => '',
1013                            'aFeatureName' => array(),
1014                            'sClass' => '',
1015                            'sType' => '',
1016                            'sHouseNumber' => '',
1017                            'sPostcode' => '',
1018                            'oNear' => $oNearPoint
1019                           )
1020                          );
1021
1022             // Any 'special' terms in the search?
1023             $bSpecialTerms = false;
1024             preg_match_all('/\\[(.*)=(.*)\\]/', $sQuery, $aSpecialTermsRaw, PREG_SET_ORDER);
1025             $aSpecialTerms = array();
1026             foreach ($aSpecialTermsRaw as $aSpecialTerm) {
1027                 $sQuery = str_replace($aSpecialTerm[0], ' ', $sQuery);
1028                 $aSpecialTerms[strtolower($aSpecialTerm[1])] = $aSpecialTerm[2];
1029             }
1030
1031             preg_match_all('/\\[([\\w ]*)\\]/u', $sQuery, $aSpecialTermsRaw, PREG_SET_ORDER);
1032             $aSpecialTerms = array();
1033             if (isset($this->aStructuredQuery['amenity']) && $this->aStructuredQuery['amenity']) {
1034                 $aSpecialTermsRaw[] = array('['.$this->aStructuredQuery['amenity'].']', $this->aStructuredQuery['amenity']);
1035                 unset($this->aStructuredQuery['amenity']);
1036             }
1037
1038             foreach ($aSpecialTermsRaw as $aSpecialTerm) {
1039                 $sQuery = str_replace($aSpecialTerm[0], ' ', $sQuery);
1040                 $sToken = chksql($this->oDB->getOne("SELECT make_standard_name('".$aSpecialTerm[1]."') AS string"));
1041                 $sSQL = 'SELECT * ';
1042                 $sSQL .= 'FROM ( ';
1043                 $sSQL .= '   SELECT word_id, word_token, word, class, type, country_code, operator';
1044                 $sSQL .= '   FROM word ';
1045                 $sSQL .= '   WHERE word_token in (\' '.$sToken.'\')';
1046                 $sSQL .= ') AS x ';
1047                 $sSQL .= ' WHERE (class is not null AND class not in (\'place\')) ';
1048                 $sSQL .= ' OR country_code is not null';
1049                 if (CONST_Debug) var_Dump($sSQL);
1050                 $aSearchWords = chksql($this->oDB->getAll($sSQL));
1051                 $aNewSearches = array();
1052                 foreach ($aSearches as $aSearch) {
1053                     foreach ($aSearchWords as $aSearchTerm) {
1054                         $aNewSearch = $aSearch;
1055                         if ($aSearchTerm['country_code']) {
1056                             $aNewSearch['sCountryCode'] = strtolower($aSearchTerm['country_code']);
1057                             $aNewSearches[] = $aNewSearch;
1058                             $bSpecialTerms = true;
1059                         }
1060                         if ($aSearchTerm['class']) {
1061                             $aNewSearch['sClass'] = $aSearchTerm['class'];
1062                             $aNewSearch['sType'] = $aSearchTerm['type'];
1063                             $aNewSearches[] = $aNewSearch;
1064                             $bSpecialTerms = true;
1065                         }
1066                     }
1067                 }
1068                 $aSearches = $aNewSearches;
1069             }
1070
1071             // Split query into phrases
1072             // Commas are used to reduce the search space by indicating where phrases split
1073             if ($this->aStructuredQuery) {
1074                 $aPhrases = $this->aStructuredQuery;
1075                 $bStructuredPhrases = true;
1076             } else {
1077                 $aPhrases = explode(',', $sQuery);
1078                 $bStructuredPhrases = false;
1079             }
1080
1081             // Convert each phrase to standard form
1082             // Create a list of standard words
1083             // Get all 'sets' of words
1084             // Generate a complete list of all
1085             $aTokens = array();
1086             foreach ($aPhrases as $iPhrase => $sPhrase) {
1087                 $aPhrase = chksql(
1088                     $this->oDB->getRow("SELECT make_standard_name('".pg_escape_string($sPhrase)."') as string"),
1089                     "Cannot normalize query string (is it a UTF-8 string?)"
1090                 );
1091                 if (trim($aPhrase['string'])) {
1092                     $aPhrases[$iPhrase] = $aPhrase;
1093                     $aPhrases[$iPhrase]['words'] = explode(' ', $aPhrases[$iPhrase]['string']);
1094                     $aPhrases[$iPhrase]['wordsets'] = getWordSets($aPhrases[$iPhrase]['words'], 0);
1095                     $aTokens = array_merge($aTokens, getTokensFromSets($aPhrases[$iPhrase]['wordsets']));
1096                 } else {
1097                     unset($aPhrases[$iPhrase]);
1098                 }
1099             }
1100
1101             // Reindex phrases - we make assumptions later on that they are numerically keyed in order
1102             $aPhraseTypes = array_keys($aPhrases);
1103             $aPhrases = array_values($aPhrases);
1104
1105             if (sizeof($aTokens)) {
1106                 // Check which tokens we have, get the ID numbers
1107                 $sSQL = 'SELECT word_id, word_token, word, class, type, country_code, operator, search_name_count';
1108                 $sSQL .= ' FROM word ';
1109                 $sSQL .= ' WHERE word_token in ('.join(',', array_map("getDBQuoted", $aTokens)).')';
1110
1111                 if (CONST_Debug) var_Dump($sSQL);
1112
1113                 $aValidTokens = array();
1114                 if (sizeof($aTokens)) {
1115                     $aDatabaseWords = chksql(
1116                         $this->oDB->getAll($sSQL),
1117                         "Could not get word tokens."
1118                     );
1119                 } else {
1120                     $aDatabaseWords = array();
1121                 }
1122                 $aPossibleMainWordIDs = array();
1123                 $aWordFrequencyScores = array();
1124                 foreach ($aDatabaseWords as $aToken) {
1125                     // Very special case - require 2 letter country param to match the country code found
1126                     if ($bStructuredPhrases && $aToken['country_code'] && !empty($this->aStructuredQuery['country'])
1127                         && strlen($this->aStructuredQuery['country']) == 2 && strtolower($this->aStructuredQuery['country']) != $aToken['country_code']
1128                     ) {
1129                         continue;
1130                     }
1131
1132                     if (isset($aValidTokens[$aToken['word_token']])) {
1133                         $aValidTokens[$aToken['word_token']][] = $aToken;
1134                     } else {
1135                         $aValidTokens[$aToken['word_token']] = array($aToken);
1136                     }
1137                     if (!$aToken['class'] && !$aToken['country_code']) $aPossibleMainWordIDs[$aToken['word_id']] = 1;
1138                     $aWordFrequencyScores[$aToken['word_id']] = $aToken['search_name_count'] + 1;
1139                 }
1140                 if (CONST_Debug) var_Dump($aPhrases, $aValidTokens);
1141
1142                 // US ZIP+4 codes - if there is no token, merge in the 5-digit ZIP code
1143                 foreach ($aTokens as $sToken) {
1144                     if (!isset($aValidTokens[$sToken]) && preg_match('/^([0-9]{5}) [0-9]{4}$/', $sToken, $aData)) {
1145                         if (isset($aValidTokens[$aData[1]])) {
1146                             foreach ($aValidTokens[$aData[1]] as $aToken) {
1147                                 if (!$aToken['class']) {
1148                                     if (isset($aValidTokens[$sToken])) {
1149                                         $aValidTokens[$sToken][] = $aToken;
1150                                     } else {
1151                                         $aValidTokens[$sToken] = array($aToken);
1152                                     }
1153                                 }
1154                             }
1155                         }
1156                     }
1157                 }
1158
1159                 foreach ($aTokens as $sToken) {
1160                     // Unknown single word token with a number - assume it is a house number
1161                     if (!isset($aValidTokens[' '.$sToken]) && strpos($sToken, ' ') === false && preg_match('/[0-9]/', $sToken)) {
1162                         $aValidTokens[' '.$sToken] = array(array('class' => 'place', 'type' => 'house'));
1163                     }
1164                 }
1165
1166                 // Any words that have failed completely?
1167                 // TODO: suggestions
1168
1169                 // Start the search process
1170                 // array with: placeid => -1 | tiger-housenumber
1171                 $aResultPlaceIDs = array();
1172
1173                 $aGroupedSearches = $this->getGroupedSearches($aSearches, $aPhraseTypes, $aPhrases, $aValidTokens, $aWordFrequencyScores, $bStructuredPhrases, $sNormQuery);
1174
1175                 if ($this->bReverseInPlan) {
1176                     // Reverse phrase array and also reverse the order of the wordsets in
1177                     // the first and final phrase. Don't bother about phrases in the middle
1178                     // because order in the address doesn't matter.
1179                     $aPhrases = array_reverse($aPhrases);
1180                     $aPhrases[0]['wordsets'] = getInverseWordSets($aPhrases[0]['words'], 0);
1181                     if (sizeof($aPhrases) > 1) {
1182                         $aFinalPhrase = end($aPhrases);
1183                         $aPhrases[sizeof($aPhrases)-1]['wordsets'] = getInverseWordSets($aFinalPhrase['words'], 0);
1184                     }
1185                     $aReverseGroupedSearches = $this->getGroupedSearches($aSearches, null, $aPhrases, $aValidTokens, $aWordFrequencyScores, false, $sNormQuery);
1186
1187                     foreach ($aGroupedSearches as $aSearches) {
1188                         foreach ($aSearches as $aSearch) {
1189                             if ($aSearch['iSearchRank'] < $this->iMaxRank) {
1190                                 if (!isset($aReverseGroupedSearches[$aSearch['iSearchRank']])) $aReverseGroupedSearches[$aSearch['iSearchRank']] = array();
1191                                 $aReverseGroupedSearches[$aSearch['iSearchRank']][] = $aSearch;
1192                             }
1193                         }
1194                     }
1195
1196                     $aGroupedSearches = $aReverseGroupedSearches;
1197                     ksort($aGroupedSearches);
1198                 }
1199             } else {
1200                 // Re-group the searches by their score, junk anything over 20 as just not worth trying
1201                 $aGroupedSearches = array();
1202                 foreach ($aSearches as $aSearch) {
1203                     if ($aSearch['iSearchRank'] < $this->iMaxRank) {
1204                         if (!isset($aGroupedSearches[$aSearch['iSearchRank']])) $aGroupedSearches[$aSearch['iSearchRank']] = array();
1205                         $aGroupedSearches[$aSearch['iSearchRank']][] = $aSearch;
1206                     }
1207                 }
1208                 ksort($aGroupedSearches);
1209             }
1210
1211             if (CONST_Search_TryDroppedAddressTerms && sizeof($this->aStructuredQuery) > 0) {
1212                 $aCopyGroupedSearches = $aGroupedSearches;
1213                 foreach ($aCopyGroupedSearches as $iGroup => $aSearches) {
1214                     foreach ($aSearches as $iSearch => $aSearch) {
1215                         $aReductionsList = array($aSearch['aAddress']);
1216                         $iSearchRank = $aSearch['iSearchRank'];
1217                         while (sizeof($aReductionsList) > 0) {
1218                             $iSearchRank += 5;
1219                             if ($iSearchRank > iMaxRank) break 3;
1220                             $aNewReductionsList = array();
1221                             foreach ($aReductionsList as $aReductionsWordList) {
1222                                 for ($iReductionWord = 0; $iReductionWord < sizeof($aReductionsWordList); $iReductionWord++) {
1223                                     $aReductionsWordListResult = array_merge(array_slice($aReductionsWordList, 0, $iReductionWord), array_slice($aReductionsWordList, $iReductionWord+1));
1224                                     $aReverseSearch = $aSearch;
1225                                     $aSearch['aAddress'] = $aReductionsWordListResult;
1226                                     $aSearch['iSearchRank'] = $iSearchRank;
1227                                     $aGroupedSearches[$iSearchRank][] = $aReverseSearch;
1228                                     if (sizeof($aReductionsWordListResult) > 0) {
1229                                         $aNewReductionsList[] = $aReductionsWordListResult;
1230                                     }
1231                                 }
1232                             }
1233                             $aReductionsList = $aNewReductionsList;
1234                         }
1235                     }
1236                 }
1237                 ksort($aGroupedSearches);
1238             }
1239
1240             // Filter out duplicate searches
1241             $aSearchHash = array();
1242             foreach ($aGroupedSearches as $iGroup => $aSearches) {
1243                 foreach ($aSearches as $iSearch => $aSearch) {
1244                     $sHash = serialize($aSearch);
1245                     if (isset($aSearchHash[$sHash])) {
1246                         unset($aGroupedSearches[$iGroup][$iSearch]);
1247                         if (sizeof($aGroupedSearches[$iGroup]) == 0) unset($aGroupedSearches[$iGroup]);
1248                     } else {
1249                         $aSearchHash[$sHash] = 1;
1250                     }
1251                 }
1252             }
1253
1254             if (CONST_Debug) _debugDumpGroupedSearches($aGroupedSearches, $aValidTokens);
1255
1256             $iGroupLoop = 0;
1257             $iQueryLoop = 0;
1258             foreach ($aGroupedSearches as $iGroupedRank => $aSearches) {
1259                 $iGroupLoop++;
1260                 foreach ($aSearches as $aSearch) {
1261                     $iQueryLoop++;
1262                     $searchedHousenumber = -1;
1263
1264                     if (CONST_Debug) echo "<hr><b>Search Loop, group $iGroupLoop, loop $iQueryLoop</b>";
1265                     if (CONST_Debug) _debugDumpGroupedSearches(array($iGroupedRank => array($aSearch)), $aValidTokens);
1266
1267                     if ($sCountryCodesSQL && $aSearch['sCountryCode'] && !in_array($aSearch['sCountryCode'], $this->aCountryCodes)) {
1268                         continue;
1269                     }
1270
1271                     // No location term?
1272                     if (!sizeof($aSearch['aName']) && !sizeof($aSearch['aAddress']) && !$aSearch['oNear']) {
1273                         if ($aSearch['sCountryCode'] && !$aSearch['sClass'] && !$aSearch['sHouseNumber']) {
1274                             // Just looking for a country by code - look it up
1275                             if (4 >= $this->iMinAddressRank && 4 <= $this->iMaxAddressRank) {
1276                                 $sSQL = "SELECT place_id FROM placex WHERE country_code='".$aSearch['sCountryCode']."' AND rank_search = 4";
1277                                 if ($bBoundingBoxSearch)
1278                                     $sSQL .= " AND _st_intersects($this->sViewboxSmallSQL, geometry)";
1279                                 $sSQL .= " ORDER BY st_area(geometry) DESC LIMIT 1";
1280                                 if (CONST_Debug) var_dump($sSQL);
1281                                 $aPlaceIDs = chksql($this->oDB->getCol($sSQL));
1282                             } else {
1283                                 $aPlaceIDs = array();
1284                             }
1285                         } else {
1286                             if (!$bBoundingBoxSearch && !$aSearch['oNear']) continue;
1287                             if (!$aSearch['sClass']) continue;
1288
1289                             $sSQL = "SELECT COUNT(*) FROM pg_tables WHERE tablename = 'place_classtype_".$aSearch['sClass']."_".$aSearch['sType']."'";
1290                             if (chksql($this->oDB->getOne($sSQL))) {
1291                                 $sSQL = "SELECT place_id FROM place_classtype_".$aSearch['sClass']."_".$aSearch['sType']." ct";
1292                                 if ($sCountryCodesSQL) $sSQL .= " JOIN placex USING (place_id)";
1293                                 $sSQL .= " WHERE st_contains($this->sViewboxSmallSQL, ct.centroid)";
1294                                 if ($sCountryCodesSQL) $sSQL .= " AND country_code in ($sCountryCodesSQL)";
1295                                 if (sizeof($this->aExcludePlaceIDs)) {
1296                                     $sSQL .= " AND place_id not in (".join(',', $this->aExcludePlaceIDs).")";
1297                                 }
1298                                 if ($this->sViewboxCentreSQL) $sSQL .= " ORDER BY ST_Distance($this->sViewboxCentreSQL, ct.centroid) ASC";
1299                                 $sSQL .= " limit $this->iLimit";
1300                                 if (CONST_Debug) var_dump($sSQL);
1301                                 $aPlaceIDs = chksql($this->oDB->getCol($sSQL));
1302
1303                                 // If excluded place IDs are given, it is fair to assume that
1304                                 // there have been results in the small box, so no further
1305                                 // expansion in that case.
1306                                 // Also don't expand if bounded results were requested.
1307                                 if (!sizeof($aPlaceIDs) && !sizeof($this->aExcludePlaceIDs) && !$this->bBoundedSearch) {
1308                                     $sSQL = "SELECT place_id FROM place_classtype_".$aSearch['sClass']."_".$aSearch['sType']." ct";
1309                                     if ($sCountryCodesSQL) $sSQL .= " join placex using (place_id)";
1310                                     $sSQL .= " WHERE ST_Contains($this->sViewboxLargeSQL, ct.centroid)";
1311                                     if ($sCountryCodesSQL) $sSQL .= " AND country_code in ($sCountryCodesSQL)";
1312                                     if ($this->sViewboxCentreSQL) $sSQL .= " ORDER BY ST_Distance($this->sViewboxCentreSQL, ct.centroid) ASC";
1313                                     $sSQL .= " LIMIT $this->iLimit";
1314                                     if (CONST_Debug) var_dump($sSQL);
1315                                     $aPlaceIDs = chksql($this->oDB->getCol($sSQL));
1316                                 }
1317                             } else {
1318                                 $sSQL = "SELECT place_id ";
1319                                 $sSQL .= "FROM placex ";
1320                                 $sSQL .= "WHERE class='".$aSearch['sClass']."' ";
1321                                 $sSQL .= "  AND type='".$aSearch['sType']."'";
1322                                 $sSQL .= "  AND ST_Contains($this->sViewboxSmallSQL, geometry) ";
1323                                 $sSQL .= "  AND linked_place_id is null";
1324                                 if ($sCountryCodesSQL) $sSQL .= " AND country_code in ($sCountryCodesSQL)";
1325                                 if ($this->sViewboxCentreSQL)   $sSQL .= " ORDER BY ST_Distance($this->sViewboxCentreSQL, centroid) ASC";
1326                                 $sSQL .= " LIMIT $this->iLimit";
1327                                 if (CONST_Debug) var_dump($sSQL);
1328                                 $aPlaceIDs = chksql($this->oDB->getCol($sSQL));
1329                             }
1330                         }
1331                     } elseif ($aSearch['oNear'] && !sizeof($aSearch['aName']) && !sizeof($aSearch['aAddress']) && !$aSearch['sClass']) {
1332                         // If a coordinate is given, the search must either
1333                         // be for a name or a special search. Ignore everythin else.
1334                         $aPlaceIDs = array();
1335                     } elseif ($aSearch['sOperator'] == 'postcode') {
1336                         $sSQL  = "SELECT p.place_id FROM location_postcode p ";
1337                         if (sizeof($aSearch['aAddress'])) {
1338                             $sSQL .= ", search_name s ";
1339                             $sSQL .= "WHERE s.place_id = p.parent_place_id ";
1340                             $sSQL .= "AND array_cat(s.nameaddress_vector, s.name_vector) @> ARRAY[".join($aSearch['aAddress'], ",")."] AND ";
1341                         } else {
1342                             $sSQL .= " WHERE ";
1343                         }
1344                         $sSQL .= "p.postcode = '".pg_escape_string(reset($aSearch['aName']))."'";
1345                         if ($aSearch['sCountryCode']) {
1346                             $sSQL .= " AND p.country_code = '".$aSearch['sCountryCode']."'";
1347                         } elseif ($sCountryCodesSQL) {
1348                             $sSQL .= " AND p.country_code in ($sCountryCodesSQL)";
1349                         }
1350                         $sSQL .= " LIMIT $this->iLimit";
1351                         if (CONST_Debug) var_dump($sSQL);
1352                         $aPlaceIDs = chksql($this->oDB->getCol($sSQL));
1353                     } else {
1354                         $aPlaceIDs = array();
1355
1356                         // First we need a position, either aName or fLat or both
1357                         $aTerms = array();
1358                         $aOrder = array();
1359
1360                         if ($aSearch['sHouseNumber'] && sizeof($aSearch['aAddress'])) {
1361                             $sHouseNumberRegex = '\\\\m'.$aSearch['sHouseNumber'].'\\\\M';
1362                             $aOrder[] = "";
1363                             $aOrder[0] = "  (";
1364                             $aOrder[0] .= "   EXISTS(";
1365                             $aOrder[0] .= "     SELECT place_id ";
1366                             $aOrder[0] .= "     FROM placex ";
1367                             $aOrder[0] .= "     WHERE parent_place_id = search_name.place_id";
1368                             $aOrder[0] .= "       AND transliteration(housenumber) ~* E'".$sHouseNumberRegex."' ";
1369                             $aOrder[0] .= "     LIMIT 1";
1370                             $aOrder[0] .= "   ) ";
1371                             // also housenumbers from interpolation lines table are needed
1372                             $aOrder[0] .= "   OR EXISTS(";
1373                             $aOrder[0] .= "     SELECT place_id ";
1374                             $aOrder[0] .= "     FROM location_property_osmline ";
1375                             $aOrder[0] .= "     WHERE parent_place_id = search_name.place_id";
1376                             $aOrder[0] .= "       AND startnumber is not NULL";
1377                             $aOrder[0] .= "       AND ".intval($aSearch['sHouseNumber']).">=startnumber ";
1378                             $aOrder[0] .= "       AND ".intval($aSearch['sHouseNumber'])."<=endnumber ";
1379                             $aOrder[0] .= "     LIMIT 1";
1380                             $aOrder[0] .= "   )";
1381                             $aOrder[0] .= " )";
1382                             $aOrder[0] .= " DESC";
1383                         }
1384
1385                         // TODO: filter out the pointless search terms (2 letter name tokens and less)
1386                         // they might be right - but they are just too darned expensive to run
1387                         if (sizeof($aSearch['aName'])) $aTerms[] = "name_vector @> ARRAY[".join($aSearch['aName'], ",")."]";
1388                         if (sizeof($aSearch['aNameNonSearch'])) $aTerms[] = "array_cat(name_vector,ARRAY[]::integer[]) @> ARRAY[".join($aSearch['aNameNonSearch'], ",")."]";
1389                         if (sizeof($aSearch['aAddress']) && $aSearch['aName'] != $aSearch['aAddress']) {
1390                             // For infrequent name terms disable index usage for address
1391                             if (CONST_Search_NameOnlySearchFrequencyThreshold
1392                                 && sizeof($aSearch['aName']) == 1
1393                                 && $aWordFrequencyScores[$aSearch['aName'][reset($aSearch['aName'])]] < CONST_Search_NameOnlySearchFrequencyThreshold
1394                             ) {
1395                                 $aTerms[] = "array_cat(nameaddress_vector,ARRAY[]::integer[]) @> ARRAY[".join(array_merge($aSearch['aAddress'], $aSearch['aAddressNonSearch']), ",")."]";
1396                             } else {
1397                                 $aTerms[] = "nameaddress_vector @> ARRAY[".join($aSearch['aAddress'], ",")."]";
1398                                 if (sizeof($aSearch['aAddressNonSearch'])) {
1399                                     $aTerms[] = "array_cat(nameaddress_vector,ARRAY[]::integer[]) @> ARRAY[".join($aSearch['aAddressNonSearch'], ",")."]";
1400                                 }
1401                             }
1402                         }
1403                         if ($aSearch['sCountryCode']) $aTerms[] = "country_code = '".pg_escape_string($aSearch['sCountryCode'])."'";
1404                         if ($aSearch['sHouseNumber']) {
1405                             $aTerms[] = "address_rank between 16 and 27";
1406                         } else {
1407                             if ($this->iMinAddressRank > 0) {
1408                                 $aTerms[] = "address_rank >= ".$this->iMinAddressRank;
1409                             }
1410                             if ($this->iMaxAddressRank < 30) {
1411                                 $aTerms[] = "address_rank <= ".$this->iMaxAddressRank;
1412                             }
1413                         }
1414                         if ($aSearch['oNear']) {
1415                             $aTerms[] = $aSearch['oNear']->withinSQL('centroid');
1416
1417                             $aOrder[] = $aSearch['oNear']->distanceSQL('centroid');
1418                         } elseif ($aSearch['sPostcode']) {
1419                             $aOrder[] = "(SELECT min(ST_Distance(search_name.centroid, p.geometry)) FROM location_postcode p WHERE p.postcode = '".$aSearch['sPostcode']."')";
1420                         }
1421                         if (sizeof($this->aExcludePlaceIDs)) {
1422                             $aTerms[] = "place_id not in (".join(',', $this->aExcludePlaceIDs).")";
1423                         }
1424                         if ($sCountryCodesSQL) {
1425                             $aTerms[] = "country_code in ($sCountryCodesSQL)";
1426                         }
1427
1428                         if ($bBoundingBoxSearch) $aTerms[] = "centroid && $this->sViewboxSmallSQL";
1429                         if ($oNearPoint) {
1430                             $aOrder[] = $oNearPoint->distanceSQL('centroid');
1431                         }
1432
1433                         if ($aSearch['sHouseNumber']) {
1434                             $sImportanceSQL = '- abs(26 - address_rank) + 3';
1435                         } else {
1436                             $sImportanceSQL = '(CASE WHEN importance = 0 OR importance IS NULL THEN 0.75-(search_rank::float/40) ELSE importance END)';
1437                         }
1438                         if ($this->sViewboxSmallSQL) $sImportanceSQL .= " * CASE WHEN ST_Contains($this->sViewboxSmallSQL, centroid) THEN 1 ELSE 0.5 END";
1439                         if ($this->sViewboxLargeSQL) $sImportanceSQL .= " * CASE WHEN ST_Contains($this->sViewboxLargeSQL, centroid) THEN 1 ELSE 0.5 END";
1440
1441                         $aOrder[] = "$sImportanceSQL DESC";
1442                         if (sizeof($aSearch['aFullNameAddress'])) {
1443                             $sExactMatchSQL = ' ( ';
1444                             $sExactMatchSQL .= '   SELECT count(*) FROM ( ';
1445                             $sExactMatchSQL .= '      SELECT unnest(ARRAY['.join($aSearch['aFullNameAddress'], ",").']) ';
1446                             $sExactMatchSQL .= '      INTERSECT ';
1447                             $sExactMatchSQL .= '      SELECT unnest(nameaddress_vector)';
1448                             $sExactMatchSQL .= '   ) s';
1449                             $sExactMatchSQL .= ') as exactmatch';
1450                             $aOrder[] = 'exactmatch DESC';
1451                         } else {
1452                             $sExactMatchSQL = '0::int as exactmatch';
1453                         }
1454
1455                         if (sizeof($aTerms)) {
1456                             $sSQL = "SELECT place_id, ";
1457                             $sSQL .= $sExactMatchSQL;
1458                             $sSQL .= " FROM search_name";
1459                             $sSQL .= " WHERE ".join(' and ', $aTerms);
1460                             $sSQL .= " ORDER BY ".join(', ', $aOrder);
1461                             if ($aSearch['sHouseNumber'] || $aSearch['sClass']) {
1462                                 $sSQL .= " LIMIT 20";
1463                             } elseif (!sizeof($aSearch['aName']) && !sizeof($aSearch['aAddress']) && $aSearch['sClass']) {
1464                                 $sSQL .= " LIMIT 1";
1465                             } else {
1466                                 $sSQL .= " LIMIT ".$this->iLimit;
1467                             }
1468
1469                             if (CONST_Debug) var_dump($sSQL);
1470                             $aViewBoxPlaceIDs = chksql(
1471                                 $this->oDB->getAll($sSQL),
1472                                 "Could not get places for search terms."
1473                             );
1474                             //var_dump($aViewBoxPlaceIDs);
1475                             // Did we have an viewbox matches?
1476                             $aPlaceIDs = array();
1477                             $bViewBoxMatch = false;
1478                             foreach ($aViewBoxPlaceIDs as $aViewBoxRow) {
1479                                 //if ($bViewBoxMatch == 1 && $aViewBoxRow['in_small'] == 'f') break;
1480                                 //if ($bViewBoxMatch == 2 && $aViewBoxRow['in_large'] == 'f') break;
1481                                 //if ($aViewBoxRow['in_small'] == 't') $bViewBoxMatch = 1;
1482                                 //else if ($aViewBoxRow['in_large'] == 't') $bViewBoxMatch = 2;
1483                                 $aPlaceIDs[] = $aViewBoxRow['place_id'];
1484                                 $this->exactMatchCache[$aViewBoxRow['place_id']] = $aViewBoxRow['exactmatch'];
1485                             }
1486                         }
1487                         //var_Dump($aPlaceIDs);
1488                         //exit;
1489
1490                         //now search for housenumber, if housenumber provided
1491                         if ($aSearch['sHouseNumber'] && sizeof($aPlaceIDs)) {
1492                             $searchedHousenumber = intval($aSearch['sHouseNumber']);
1493                             $aRoadPlaceIDs = $aPlaceIDs;
1494                             $sPlaceIDs = join(',', $aPlaceIDs);
1495
1496                             // Now they are indexed, look for a house attached to a street we found
1497                             $sHouseNumberRegex = '\\\\m'.$aSearch['sHouseNumber'].'\\\\M';
1498                             $sSQL = "SELECT place_id FROM placex ";
1499                             $sSQL .= "WHERE parent_place_id in (".$sPlaceIDs.") and transliteration(housenumber) ~* E'".$sHouseNumberRegex."'";
1500                             if (sizeof($this->aExcludePlaceIDs)) {
1501                                 $sSQL .= " AND place_id not in (".join(',', $this->aExcludePlaceIDs).")";
1502                             }
1503                             $sSQL .= " LIMIT $this->iLimit";
1504                             if (CONST_Debug) var_dump($sSQL);
1505                             $aPlaceIDs = chksql($this->oDB->getCol($sSQL));
1506
1507                             // if nothing found, search in the interpolation line table
1508                             if (!sizeof($aPlaceIDs)) {
1509                                 // do we need to use transliteration and the regex for housenumbers???
1510                                 //new query for lines, not housenumbers anymore
1511                                 $sSQL = "SELECT distinct place_id FROM location_property_osmline";
1512                                 $sSQL .= " WHERE startnumber is not NULL and parent_place_id in (".$sPlaceIDs.") and (";
1513                                 if ($searchedHousenumber%2 == 0) {
1514                                     //if housenumber is even, look for housenumber in streets with interpolationtype even or all
1515                                     $sSQL .= "interpolationtype='even'";
1516                                 } else {
1517                                     //look for housenumber in streets with interpolationtype odd or all
1518                                     $sSQL .= "interpolationtype='odd'";
1519                                 }
1520                                 $sSQL .= " or interpolationtype='all') and ";
1521                                 $sSQL .= $searchedHousenumber.">=startnumber and ";
1522                                 $sSQL .= $searchedHousenumber."<=endnumber";
1523
1524                                 if (sizeof($this->aExcludePlaceIDs)) {
1525                                     $sSQL .= " AND place_id not in (".join(',', $this->aExcludePlaceIDs).")";
1526                                 }
1527                                 //$sSQL .= " limit $this->iLimit";
1528                                 if (CONST_Debug) var_dump($sSQL);
1529                                 //get place IDs
1530                                 $aPlaceIDs = chksql($this->oDB->getCol($sSQL, 0));
1531                             }
1532
1533                             // If nothing found try the aux fallback table
1534                             if (CONST_Use_Aux_Location_data && !sizeof($aPlaceIDs)) {
1535                                 $sSQL = "SELECT place_id FROM location_property_aux ";
1536                                 $sSQL .= " WHERE parent_place_id in (".$sPlaceIDs.") ";
1537                                 $sSQL .= " AND housenumber = '".pg_escape_string($aSearch['sHouseNumber'])."'";
1538                                 if (sizeof($this->aExcludePlaceIDs)) {
1539                                     $sSQL .= " AND parent_place_id not in (".join(',', $this->aExcludePlaceIDs).")";
1540                                 }
1541                                 //$sSQL .= " limit $this->iLimit";
1542                                 if (CONST_Debug) var_dump($sSQL);
1543                                 $aPlaceIDs = chksql($this->oDB->getCol($sSQL));
1544                             }
1545
1546                             //if nothing was found in placex or location_property_aux, then search in Tiger data for this housenumber(location_property_tiger)
1547                             if (CONST_Use_US_Tiger_Data && !sizeof($aPlaceIDs)) {
1548                                 $sSQL = "SELECT distinct place_id FROM location_property_tiger";
1549                                 $sSQL .= " WHERE parent_place_id in (".$sPlaceIDs.") and (";
1550                                 if ($searchedHousenumber%2 == 0) {
1551                                     $sSQL .= "interpolationtype='even'";
1552                                 } else {
1553                                     $sSQL .= "interpolationtype='odd'";
1554                                 }
1555                                 $sSQL .= " or interpolationtype='all') and ";
1556                                 $sSQL .= $searchedHousenumber.">=startnumber and ";
1557                                 $sSQL .= $searchedHousenumber."<=endnumber";
1558
1559                                 if (sizeof($this->aExcludePlaceIDs)) {
1560                                     $sSQL .= " AND place_id not in (".join(',', $this->aExcludePlaceIDs).")";
1561                                 }
1562                                 //$sSQL .= " limit $this->iLimit";
1563                                 if (CONST_Debug) var_dump($sSQL);
1564                                 //get place IDs
1565                                 $aPlaceIDs = chksql($this->oDB->getCol($sSQL, 0));
1566                             }
1567
1568                             // Fallback to the road (if no housenumber was found)
1569                             if (!sizeof($aPlaceIDs) && preg_match('/[0-9]+/', $aSearch['sHouseNumber'])) {
1570                                 $aPlaceIDs = $aRoadPlaceIDs;
1571                                 //set to -1, if no housenumbers were found
1572                                 $searchedHousenumber = -1;
1573                             }
1574                             //else: housenumber was found, remains saved in searchedHousenumber
1575                         }
1576
1577
1578                         if ($aSearch['sClass'] && sizeof($aPlaceIDs)) {
1579                             $sPlaceIDs = join(',', $aPlaceIDs);
1580                             $aClassPlaceIDs = array();
1581
1582                             if (!$aSearch['sOperator'] || $aSearch['sOperator'] == 'name') {
1583                                 // If they were searching for a named class (i.e. 'Kings Head pub') then we might have an extra match
1584                                 $sSQL = "SELECT place_id ";
1585                                 $sSQL .= " FROM placex ";
1586                                 $sSQL .= " WHERE place_id in ($sPlaceIDs) ";
1587                                 $sSQL .= "   AND class='".$aSearch['sClass']."' ";
1588                                 $sSQL .= "   AND type='".$aSearch['sType']."'";
1589                                 $sSQL .= "   AND linked_place_id is null";
1590                                 if ($sCountryCodesSQL) $sSQL .= " AND country_code in ($sCountryCodesSQL)";
1591                                 $sSQL .= " ORDER BY rank_search ASC ";
1592                                 $sSQL .= " LIMIT $this->iLimit";
1593                                 if (CONST_Debug) var_dump($sSQL);
1594                                 $aClassPlaceIDs = chksql($this->oDB->getCol($sSQL));
1595                             }
1596
1597                             if (!$aSearch['sOperator'] || $aSearch['sOperator'] == 'near') { // & in
1598                                 $sClassTable = 'place_classtype_'.$aSearch['sClass'].'_'.$aSearch['sType'];
1599                                 $sSQL = "SELECT count(*) FROM pg_tables ";
1600                                 $sSQL .= "WHERE tablename = '$sClassTable'";
1601                                 $bCacheTable = chksql($this->oDB->getOne($sSQL));
1602
1603                                 $sSQL = "SELECT min(rank_search) FROM placex WHERE place_id in ($sPlaceIDs)";
1604
1605                                 if (CONST_Debug) var_dump($sSQL);
1606                                 $this->iMaxRank = ((int)chksql($this->oDB->getOne($sSQL)));
1607
1608                                 // For state / country level searches the normal radius search doesn't work very well
1609                                 $sPlaceGeom = false;
1610                                 if ($this->iMaxRank < 9 && $bCacheTable) {
1611                                     // Try and get a polygon to search in instead
1612                                     $sSQL = "SELECT geometry ";
1613                                     $sSQL .= " FROM placex";
1614                                     $sSQL .= " WHERE place_id in ($sPlaceIDs)";
1615                                     $sSQL .= "   AND rank_search < $this->iMaxRank + 5";
1616                                     $sSQL .= "   AND ST_Geometrytype(geometry) in ('ST_Polygon','ST_MultiPolygon')";
1617                                     $sSQL .= " ORDER BY rank_search ASC ";
1618                                     $sSQL .= " LIMIT 1";
1619                                     if (CONST_Debug) var_dump($sSQL);
1620                                     $sPlaceGeom = chksql($this->oDB->getOne($sSQL));
1621                                 }
1622
1623                                 if ($sPlaceGeom) {
1624                                     $sPlaceIDs = false;
1625                                 } else {
1626                                     $this->iMaxRank += 5;
1627                                     $sSQL = "SELECT place_id FROM placex WHERE place_id in ($sPlaceIDs) and rank_search < $this->iMaxRank";
1628                                     if (CONST_Debug) var_dump($sSQL);
1629                                     $aPlaceIDs = chksql($this->oDB->getCol($sSQL));
1630                                     $sPlaceIDs = join(',', $aPlaceIDs);
1631                                 }
1632
1633                                 if ($sPlaceIDs || $sPlaceGeom) {
1634                                     $fRange = 0.01;
1635                                     if ($bCacheTable) {
1636                                         // More efficient - can make the range bigger
1637                                         $fRange = 0.05;
1638
1639                                         $sOrderBySQL = '';
1640                                         if ($oNearPoint) {
1641                                             $sOrderBySQL = $oNearPoint->distanceSQL('l.centroid');
1642                                         } elseif ($sPlaceIDs) {
1643                                             $sOrderBySQL = "ST_Distance(l.centroid, f.geometry)";
1644                                         } elseif ($sPlaceGeom) {
1645                                             $sOrderBysSQL = "ST_Distance(st_centroid('".$sPlaceGeom."'), l.centroid)";
1646                                         }
1647
1648                                         $sSQL = "select distinct i.place_id".($sOrderBySQL?', i.order_term':'')." from (";
1649                                         $sSQL .= "select l.place_id".($sOrderBySQL?','.$sOrderBySQL.' as order_term':'')." from ".$sClassTable." as l";
1650                                         if ($sCountryCodesSQL) $sSQL .= " join placex as lp using (place_id)";
1651                                         if ($sPlaceIDs) {
1652                                             $sSQL .= ",placex as f where ";
1653                                             $sSQL .= "f.place_id in ($sPlaceIDs) and ST_DWithin(l.centroid, f.centroid, $fRange) ";
1654                                         }
1655                                         if ($sPlaceGeom) {
1656                                             $sSQL .= " where ";
1657                                             $sSQL .= "ST_Contains('".$sPlaceGeom."', l.centroid) ";
1658                                         }
1659                                         if (sizeof($this->aExcludePlaceIDs)) {
1660                                             $sSQL .= " and l.place_id not in (".join(',', $this->aExcludePlaceIDs).")";
1661                                         }
1662                                         if ($sCountryCodesSQL) $sSQL .= " and lp.country_code in ($sCountryCodesSQL)";
1663                                         $sSQL .= 'limit 300) i ';
1664                                         if ($sOrderBySQL) $sSQL .= "order by order_term asc";
1665                                         if ($this->iOffset) $sSQL .= " offset $this->iOffset";
1666                                         $sSQL .= " limit $this->iLimit";
1667                                         if (CONST_Debug) var_dump($sSQL);
1668                                         $aClassPlaceIDs = array_merge($aClassPlaceIDs, chksql($this->oDB->getCol($sSQL)));
1669                                     } else {
1670                                         if ($aSearch['oNear']) {
1671                                             $fRange = $aSearch['oNear']->radius();
1672                                         }
1673
1674                                         $sOrderBySQL = '';
1675                                         if ($oNearPoint) {
1676                                             $sOrderBySQL = $oNearPoint->distanceSQL('l.geometry');
1677                                         } else {
1678                                             $sOrderBySQL = "ST_Distance(l.geometry, f.geometry)";
1679                                         }
1680
1681                                         $sSQL = "SELECT distinct l.place_id".($sOrderBysSQL?','.$sOrderBysSQL:'');
1682                                         $sSQL .= " FROM placex as l, placex as f ";
1683                                         $sSQL .= " WHERE f.place_id in ($sPlaceIDs) ";
1684                                         $sSQL .= "  AND ST_DWithin(l.geometry, f.centroid, $fRange) ";
1685                                         $sSQL .= "  AND l.class='".$aSearch['sClass']."' ";
1686                                         $sSQL .= "  AND l.type='".$aSearch['sType']."' ";
1687                                         if (sizeof($this->aExcludePlaceIDs)) {
1688                                             $sSQL .= " AND l.place_id not in (".join(',', $this->aExcludePlaceIDs).")";
1689                                         }
1690                                         if ($sCountryCodesSQL) $sSQL .= " AND l.country_code in ($sCountryCodesSQL)";
1691                                         if ($sOrderBy) $sSQL .= "ORDER BY ".$OrderBysSQL." ASC";
1692                                         if ($this->iOffset) $sSQL .= " OFFSET $this->iOffset";
1693                                         $sSQL .= " limit $this->iLimit";
1694                                         if (CONST_Debug) var_dump($sSQL);
1695                                         $aClassPlaceIDs = array_merge($aClassPlaceIDs, chksql($this->oDB->getCol($sSQL)));
1696                                     }
1697                                 }
1698                             }
1699                             $aPlaceIDs = $aClassPlaceIDs;
1700                         }
1701                     }
1702
1703                     if (CONST_Debug) {
1704                         echo "<br><b>Place IDs:</b> ";
1705                         var_Dump($aPlaceIDs);
1706                     }
1707
1708                     if (sizeof($aPlaceIDs) && $aSearch['sPostcode']) {
1709                         $sSQL = 'SELECT place_id FROM placex';
1710                         $sSQL .= ' WHERE place_id in ('.join(',', $aPlaceIDs).')';
1711                         $sSQL .= " AND postcode = '".pg_escape_string($aSearch['sPostcode'])."'";
1712                         if (CONST_Debug) var_dump($sSQL);
1713                         $aFilteredPlaceIDs = chksql($this->oDB->getCol($sSQL));
1714                         if ($aFilteredPlaceIDs) {
1715                             $aPlaceIDs = $aFilteredPlaceIDs;
1716                             if (CONST_Debug) {
1717                                 echo "<br><b>Place IDs after postcode filtering:</b> ";
1718                                 var_Dump($aPlaceIDs);
1719                             }
1720                         }
1721                     }
1722
1723                     foreach ($aPlaceIDs as $iPlaceID) {
1724                         // array for placeID => -1 | Tiger housenumber
1725                         $aResultPlaceIDs[$iPlaceID] = $searchedHousenumber;
1726                     }
1727                     if ($iQueryLoop > 20) break;
1728                 }
1729
1730                 if (isset($aResultPlaceIDs) && sizeof($aResultPlaceIDs) && ($this->iMinAddressRank != 0 || $this->iMaxAddressRank != 30)) {
1731                     // Need to verify passes rank limits before dropping out of the loop (yuk!)
1732                     // reduces the number of place ids, like a filter
1733                     // rank_address is 30 for interpolated housenumbers
1734                     $sSQL = "SELECT place_id ";
1735                     $sSQL .= "FROM placex ";
1736                     $sSQL .= "WHERE place_id in (".join(',', array_keys($aResultPlaceIDs)).") ";
1737                     $sSQL .= "  AND (";
1738                     $sSQL .= "         placex.rank_address between $this->iMinAddressRank and $this->iMaxAddressRank ";
1739                     if (14 >= $this->iMinAddressRank && 14 <= $this->iMaxAddressRank) {
1740                         $sSQL .= "     OR (extratags->'place') = 'city'";
1741                     }
1742                     if ($this->aAddressRankList) {
1743                         $sSQL .= "     OR placex.rank_address in (".join(',', $this->aAddressRankList).")";
1744                     }
1745                     if (CONST_Use_US_Tiger_Data) {
1746                         $sSQL .= "  ) ";
1747                         $sSQL .= "UNION ";
1748                         $sSQL .= "  SELECT place_id ";
1749                         $sSQL .= "  FROM location_property_tiger ";
1750                         $sSQL .= "  WHERE place_id in (".join(',', array_keys($aResultPlaceIDs)).") ";
1751                         $sSQL .= "    AND (30 between $this->iMinAddressRank and $this->iMaxAddressRank ";
1752                         if ($this->aAddressRankList) $sSQL .= " OR 30 in (".join(',', $this->aAddressRankList).")";
1753                     }
1754                     $sSQL .= ") UNION ";
1755                     $sSQL .= "  SELECT place_id ";
1756                     $sSQL .= "  FROM location_property_osmline ";
1757                     $sSQL .= "  WHERE place_id in (".join(',', array_keys($aResultPlaceIDs)).")";
1758                     $sSQL .= "    AND startnumber is not NULL AND (30 between $this->iMinAddressRank and $this->iMaxAddressRank)";
1759                     if (CONST_Debug) var_dump($sSQL);
1760                     $aFilteredPlaceIDs = chksql($this->oDB->getCol($sSQL));
1761                     $tempIDs = array();
1762                     foreach ($aFilteredPlaceIDs as $placeID) {
1763                         $tempIDs[$placeID] = $aResultPlaceIDs[$placeID];  //assign housenumber to placeID
1764                     }
1765                     $aResultPlaceIDs = $tempIDs;
1766                 }
1767
1768                 //exit;
1769                 if (isset($aResultPlaceIDs) && sizeof($aResultPlaceIDs)) break;
1770                 if ($iGroupLoop > 4) break;
1771                 if ($iQueryLoop > 30) break;
1772             }
1773
1774             // Did we find anything?
1775             if (isset($aResultPlaceIDs) && sizeof($aResultPlaceIDs)) {
1776                 $aSearchResults = $this->getDetails($aResultPlaceIDs);
1777             }
1778         } else {
1779             // Just interpret as a reverse geocode
1780             $oReverse = new ReverseGeocode($this->oDB);
1781             $oReverse->setZoom(18);
1782
1783             $aLookup = $oReverse->lookup(
1784                 $oNearPoint->lat(),
1785                 $oNearPoint->lon(),
1786                 false
1787             );
1788
1789             if (CONST_Debug) var_dump("Reverse search", $aLookup);
1790
1791             if ($aLookup['place_id']) {
1792                 $aSearchResults = $this->getDetails(array($aLookup['place_id'] => -1));
1793                 $aResultPlaceIDs[$aLookup['place_id']] = -1;
1794             } else {
1795                 $aSearchResults = array();
1796             }
1797         }
1798
1799         // No results? Done
1800         if (!sizeof($aSearchResults)) {
1801             if ($this->bFallback) {
1802                 if ($this->fallbackStructuredQuery()) {
1803                     return $this->lookup();
1804                 }
1805             }
1806
1807             return array();
1808         }
1809
1810         $aClassType = getClassTypesWithImportance();
1811         $aRecheckWords = preg_split('/\b[\s,\\-]*/u', $sQuery);
1812         foreach ($aRecheckWords as $i => $sWord) {
1813             if (!preg_match('/[\pL\pN]/', $sWord)) unset($aRecheckWords[$i]);
1814         }
1815
1816         if (CONST_Debug) {
1817             echo '<i>Recheck words:<\i>';
1818             var_dump($aRecheckWords);
1819         }
1820
1821         $oPlaceLookup = new PlaceLookup($this->oDB);
1822         $oPlaceLookup->setIncludePolygonAsPoints($this->bIncludePolygonAsPoints);
1823         $oPlaceLookup->setIncludePolygonAsText($this->bIncludePolygonAsText);
1824         $oPlaceLookup->setIncludePolygonAsGeoJSON($this->bIncludePolygonAsGeoJSON);
1825         $oPlaceLookup->setIncludePolygonAsKML($this->bIncludePolygonAsKML);
1826         $oPlaceLookup->setIncludePolygonAsSVG($this->bIncludePolygonAsSVG);
1827         $oPlaceLookup->setPolygonSimplificationThreshold($this->fPolygonSimplificationThreshold);
1828
1829         foreach ($aSearchResults as $iResNum => $aResult) {
1830             // Default
1831             $fDiameter = getResultDiameter($aResult);
1832
1833             $aOutlineResult = $oPlaceLookup->getOutlines($aResult['place_id'], $aResult['lon'], $aResult['lat'], $fDiameter/2);
1834             if ($aOutlineResult) {
1835                 $aResult = array_merge($aResult, $aOutlineResult);
1836             }
1837
1838             if ($aResult['extra_place'] == 'city') {
1839                 $aResult['class'] = 'place';
1840                 $aResult['type'] = 'city';
1841                 $aResult['rank_search'] = 16;
1842             }
1843
1844             // Is there an icon set for this type of result?
1845             if (isset($aClassType[$aResult['class'].':'.$aResult['type']]['icon'])
1846                 && $aClassType[$aResult['class'].':'.$aResult['type']]['icon']
1847             ) {
1848                 $aResult['icon'] = CONST_Website_BaseURL.'images/mapicons/'.$aClassType[$aResult['class'].':'.$aResult['type']]['icon'].'.p.20.png';
1849             }
1850
1851             if (isset($aClassType[$aResult['class'].':'.$aResult['type'].':'.$aResult['admin_level']]['label'])
1852                 && $aClassType[$aResult['class'].':'.$aResult['type'].':'.$aResult['admin_level']]['label']
1853             ) {
1854                 $aResult['label'] = $aClassType[$aResult['class'].':'.$aResult['type'].':'.$aResult['admin_level']]['label'];
1855             } elseif (isset($aClassType[$aResult['class'].':'.$aResult['type']]['label'])
1856                 && $aClassType[$aResult['class'].':'.$aResult['type']]['label']
1857             ) {
1858                 $aResult['label'] = $aClassType[$aResult['class'].':'.$aResult['type']]['label'];
1859             }
1860             // if tag '&addressdetails=1' is set in query
1861             if ($this->bIncludeAddressDetails) {
1862                 // getAddressDetails() is defined in lib.php and uses the SQL function get_addressdata in functions.sql
1863                 $aResult['address'] = getAddressDetails($this->oDB, $sLanguagePrefArraySQL, $aResult['place_id'], $aResult['country_code'], $aResultPlaceIDs[$aResult['place_id']]);
1864                 if ($aResult['extra_place'] == 'city' && !isset($aResult['address']['city'])) {
1865                     $aResult['address'] = array_merge(array('city' => array_values($aResult['address'])[0]), $aResult['address']);
1866                 }
1867             }
1868
1869             if ($this->bIncludeExtraTags) {
1870                 if ($aResult['extra']) {
1871                     $aResult['sExtraTags'] = json_decode($aResult['extra']);
1872                 } else {
1873                     $aResult['sExtraTags'] = (object) array();
1874                 }
1875             }
1876
1877             if ($this->bIncludeNameDetails) {
1878                 if ($aResult['names']) {
1879                     $aResult['sNameDetails'] = json_decode($aResult['names']);
1880                 } else {
1881                     $aResult['sNameDetails'] = (object) array();
1882                 }
1883             }
1884
1885             // Adjust importance for the number of exact string matches in the result
1886             $aResult['importance'] = max(0.001, $aResult['importance']);
1887             $iCountWords = 0;
1888             $sAddress = $aResult['langaddress'];
1889             foreach ($aRecheckWords as $i => $sWord) {
1890                 if (stripos($sAddress, $sWord)!==false) {
1891                     $iCountWords++;
1892                     if (preg_match("/(^|,)\s*".preg_quote($sWord, '/')."\s*(,|$)/", $sAddress)) $iCountWords += 0.1;
1893                 }
1894             }
1895
1896             $aResult['importance'] = $aResult['importance'] + ($iCountWords*0.1); // 0.1 is a completely arbitrary number but something in the range 0.1 to 0.5 would seem right
1897
1898             $aResult['name'] = $aResult['langaddress'];
1899             // secondary ordering (for results with same importance (the smaller the better):
1900             // - approximate importance of address parts
1901             $aResult['foundorder'] = -$aResult['addressimportance']/10;
1902             // - number of exact matches from the query
1903             if (isset($this->exactMatchCache[$aResult['place_id']])) {
1904                 $aResult['foundorder'] -= $this->exactMatchCache[$aResult['place_id']];
1905             } elseif (isset($this->exactMatchCache[$aResult['parent_place_id']])) {
1906                 $aResult['foundorder'] -= $this->exactMatchCache[$aResult['parent_place_id']];
1907             }
1908             // - importance of the class/type
1909             if (isset($aClassType[$aResult['class'].':'.$aResult['type']]['importance'])
1910                 && $aClassType[$aResult['class'].':'.$aResult['type']]['importance']
1911             ) {
1912                 $aResult['foundorder'] += 0.0001 * $aClassType[$aResult['class'].':'.$aResult['type']]['importance'];
1913             } else {
1914                 $aResult['foundorder'] += 0.01;
1915             }
1916             if (CONST_Debug) var_dump($aResult);
1917             $aSearchResults[$iResNum] = $aResult;
1918         }
1919         uasort($aSearchResults, 'byImportance');
1920
1921         $aOSMIDDone = array();
1922         $aClassTypeNameDone = array();
1923         $aToFilter = $aSearchResults;
1924         $aSearchResults = array();
1925
1926         $bFirst = true;
1927         foreach ($aToFilter as $iResNum => $aResult) {
1928             $this->aExcludePlaceIDs[$aResult['place_id']] = $aResult['place_id'];
1929             if ($bFirst) {
1930                 $fLat = $aResult['lat'];
1931                 $fLon = $aResult['lon'];
1932                 if (isset($aResult['zoom'])) $iZoom = $aResult['zoom'];
1933                 $bFirst = false;
1934             }
1935             if (!$this->bDeDupe || (!isset($aOSMIDDone[$aResult['osm_type'].$aResult['osm_id']])
1936                 && !isset($aClassTypeNameDone[$aResult['osm_type'].$aResult['class'].$aResult['type'].$aResult['name'].$aResult['admin_level']]))
1937             ) {
1938                 $aOSMIDDone[$aResult['osm_type'].$aResult['osm_id']] = true;
1939                 $aClassTypeNameDone[$aResult['osm_type'].$aResult['class'].$aResult['type'].$aResult['name'].$aResult['admin_level']] = true;
1940                 $aSearchResults[] = $aResult;
1941             }
1942
1943             // Absolute limit on number of results
1944             if (sizeof($aSearchResults) >= $this->iFinalLimit) break;
1945         }
1946
1947         return $aSearchResults;
1948     } // end lookup()
1949 } // end class