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 $sTerm;
  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 'viewboxlbrt'. 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                 $this->setViewBox($aViewbox);
 317             } else {
 318                 $aRoute = $oParams->getStringList('route');
 319                 $fRouteWidth = $oParams->getFloat('routewidth');
 320                 if ($aRoute && $fRouteWidth) {
 321                     $this->setRoute($aRoute, $fRouteWidth);
 322                 }
 323             }
 324         }
 325     }
 326
 327     public function setQueryFromParams($oParams)
 328     {
 329         // Search query
 330         $sQuery = $oParams->getString('q');
 331         if (!$sQuery) {
 332             $this->setStructuredQuery(
 333                 $oParams->getString('amenity'),
 334                 $oParams->getString('street'),
 335                 $oParams->getString('city'),
 336                 $oParams->getString('county'),
 337                 $oParams->getString('state'),
 338                 $oParams->getString('country'),
 339                 $oParams->getString('postalcode')
 340             );
 341             $this->setReverseInPlan(false);
 342         } else {
 343             $this->setQuery($sQuery);
 344         }
 345     }
 346
 347     public function loadStructuredAddressElement($sValue, $sKey, $iNewMinAddressRank, $iNewMaxAddressRank, $aItemListValues)
 348     {
 349         $sValue = trim($sValue);
 350         if (!$sValue) return false;
 351         $this->aStructuredQuery[$sKey] = $sValue;
 352         if ($this->iMinAddressRank == 0 && $this->iMaxAddressRank == 30) {
 353             $this->iMinAddressRank = $iNewMinAddressRank;
 354             $this->iMaxAddressRank = $iNewMaxAddressRank;
 355         }
 356         if ($aItemListValues) $this->aAddressRankList = array_merge($this->aAddressRankList, $aItemListValues);
 357         return true;
 358     }
 359
 360     public function setStructuredQuery($sAmenity = false, $sStreet = false, $sCity = false, $sCounty = false, $sState = false, $sCountry = false, $sPostalCode = false)
 361     {
 362         $this->sQuery = false;
 363
 364         // Reset
 365         $this->iMinAddressRank = 0;
 366         $this->iMaxAddressRank = 30;
 367         $this->aAddressRankList = array();
 368
 369         $this->aStructuredQuery = array();
 370         $this->sAllowedTypesSQLList = False;
 371
 372         $this->loadStructuredAddressElement($sAmenity, 'amenity', 26, 30, false);
 373         $this->loadStructuredAddressElement($sStreet, 'street', 26, 30, false);
 374         $this->loadStructuredAddressElement($sCity, 'city', 14, 24, false);
 375         $this->loadStructuredAddressElement($sCounty, 'county', 9, 13, false);
 376         $this->loadStructuredAddressElement($sState, 'state', 8, 8, false);
 377         $this->loadStructuredAddressElement($sPostalCode, 'postalcode', 5, 11, array(5, 11));
 378         $this->loadStructuredAddressElement($sCountry, 'country', 4, 4, false);
 379
 380         if (sizeof($this->aStructuredQuery) > 0) {
 381             $this->sQuery = join(', ', $this->aStructuredQuery);
 382             if ($this->iMaxAddressRank < 30) {
 383                 $this->sAllowedTypesSQLList = '(\'place\',\'boundary\')';
 384             }
 385         }
 386     }
 387
 388     public function fallbackStructuredQuery()
 389     {
 390         if (!$this->aStructuredQuery) return false;
 391
 392         $aParams = $this->aStructuredQuery;
 393
 394         if (sizeof($aParams) == 1) return false;
 395
 396         $aOrderToFallback = array('postalcode', 'street', 'city', 'county', 'state');
 397
 398         foreach ($aOrderToFallback as $sType) {
 399             if (isset($aParams[$sType])) {
 400                 unset($aParams[$sType]);
 401                 $this->setStructuredQuery(@$aParams['amenity'], @$aParams['street'], @$aParams['city'], @$aParams['county'], @$aParams['state'], @$aParams['country'], @$aParams['postalcode']);
 402                 return true;
 403             }
 404         }
 405
 406         return false;
 407     }
 408
 409     public function getDetails($aPlaceIDs)
 410     {
 411         //$aPlaceIDs is an array with key: placeID and value: tiger-housenumber, if found, else -1
 412         if (sizeof($aPlaceIDs) == 0) return array();
 413
 414         $sLanguagePrefArraySQL = "ARRAY[".join(',', array_map("getDBQuoted", $this->aLangPrefOrder))."]";
 415
 416         // Get the details for display (is this a redundant extra step?)
 417         $sPlaceIDs = join(',', array_keys($aPlaceIDs));
 418
 419         $sImportanceSQL = '';
 420         $sImportanceSQLGeom = '';
 421         if ($this->sViewboxSmallSQL) {
 422             $sImportanceSQL .= " CASE WHEN ST_Contains($this->sViewboxSmallSQL, ST_Collect(centroid)) THEN 1 ELSE 0.75 END * ";
 423             $sImportanceSQLGeom .= " CASE WHEN ST_Contains($this->sViewboxSmallSQL, geometry) THEN 1 ELSE 0.75 END * ";
 424         }
 425         if ($this->sViewboxLargeSQL) {
 426             $sImportanceSQL .= " CASE WHEN ST_Contains($this->sViewboxLargeSQL, ST_Collect(centroid)) THEN 1 ELSE 0.75 END * ";
 427             $sImportanceSQLGeom .= " CASE WHEN ST_Contains($this->sViewboxLargeSQL, geometry) THEN 1 ELSE 0.75 END * ";
 428         }
 429
 430         $sSQL  = "SELECT ";
 431         $sSQL .= "    osm_type,";
 432         $sSQL .= "    osm_id,";
 433         $sSQL .= "    class,";
 434         $sSQL .= "    type,";
 435         $sSQL .= "    admin_level,";
 436         $sSQL .= "    rank_search,";
 437         $sSQL .= "    rank_address,";
 438         $sSQL .= "    min(place_id) AS place_id, ";
 439         $sSQL .= "    min(parent_place_id) AS parent_place_id, ";
 440         $sSQL .= "    country_code, ";
 441         $sSQL .= "    get_address_by_language(place_id, -1, $sLanguagePrefArraySQL) AS langaddress,";
 442         $sSQL .= "    get_name_by_language(name, $sLanguagePrefArraySQL) AS placename,";
 443         $sSQL .= "    get_name_by_language(name, ARRAY['ref']) AS ref,";
 444         if ($this->bIncludeExtraTags) $sSQL .= "hstore_to_json(extratags)::text AS extra,";
 445         if ($this->bIncludeNameDetails) $sSQL .= "hstore_to_json(name)::text AS names,";
 446         $sSQL .= "    avg(ST_X(centroid)) AS lon, ";
 447         $sSQL .= "    avg(ST_Y(centroid)) AS lat, ";
 448         $sSQL .= "    ".$sImportanceSQL."COALESCE(importance,0.75-(rank_search::float/40)) AS importance, ";
 449         $sSQL .= "    ( ";
 450         $sSQL .= "       SELECT max(p.importance*(p.rank_address+2))";
 451         $sSQL .= "       FROM ";
 452         $sSQL .= "         place_addressline s, ";
 453         $sSQL .= "         placex p";
 454         $sSQL .= "       WHERE s.place_id = min(CASE WHEN placex.rank_search < 28 THEN placex.place_id ELSE placex.parent_place_id END)";
 455         $sSQL .= "         AND p.place_id = s.address_place_id ";
 456         $sSQL .= "         AND s.isaddress ";
 457         $sSQL .= "         AND p.importance is not null ";
 458         $sSQL .= "    ) AS addressimportance, ";
 459         $sSQL .= "    (extratags->'place') AS extra_place ";
 460         $sSQL .= " FROM placex";
 461         $sSQL .= " WHERE place_id in ($sPlaceIDs) ";
 462         $sSQL .= "   AND (";
 463         $sSQL .= "            placex.rank_address between $this->iMinAddressRank and $this->iMaxAddressRank ";
 464         if (14 >= $this->iMinAddressRank && 14 <= $this->iMaxAddressRank) {
 465             $sSQL .= "        OR (extratags->'place') = 'city'";
 466         }
 467         if ($this->aAddressRankList) {
 468             $sSQL .= "        OR placex.rank_address in (".join(',', $this->aAddressRankList).")";
 469         }
 470         $sSQL .= "       ) ";
 471         if ($this->sAllowedTypesSQLList) {
 472             $sSQL .= "AND placex.class in $this->sAllowedTypesSQLList ";
 473         }
 474         $sSQL .= "    AND linked_place_id is null ";
 475         $sSQL .= " GROUP BY ";
 476         $sSQL .= "     osm_type, ";
 477         $sSQL .= "     osm_id, ";
 478         $sSQL .= "     class, ";
 479         $sSQL .= "     type, ";
 480         $sSQL .= "     admin_level, ";
 481         $sSQL .= "     rank_search, ";
 482         $sSQL .= "     rank_address, ";
 483         $sSQL .= "     country_code, ";
 484         $sSQL .= "     importance, ";
 485         if (!$this->bDeDupe) $sSQL .= "place_id,";
 486         $sSQL .= "     langaddress, ";
 487         $sSQL .= "     placename, ";
 488         $sSQL .= "     ref, ";
 489         if ($this->bIncludeExtraTags) $sSQL .= "extratags, ";
 490         if ($this->bIncludeNameDetails) $sSQL .= "name, ";
 491         $sSQL .= "     extratags->'place' ";
 492
 493         // postcode table
 494         $sSQL .= "UNION ";
 495         $sSQL .= "SELECT";
 496         $sSQL .= "  'P' as osm_type,";
 497         $sSQL .= "  (SELECT osm_id from placex p WHERE p.place_id = lp.parent_place_id) as osm_id,";
 498         $sSQL .= "  'place' as class, 'postcode' as type,";
 499         $sSQL .= "  null as admin_level, rank_search, rank_address,";
 500         $sSQL .= "  place_id, parent_place_id, country_code,";
 501         $sSQL .= "  get_address_by_language(place_id, -1, $sLanguagePrefArraySQL) AS langaddress,";
 502         $sSQL .= "  postcode as placename,";
 503         $sSQL .= "  postcode as ref,";
 504         if ($this->bIncludeExtraTags) $sSQL .= "null AS extra,";
 505         if ($this->bIncludeNameDetails) $sSQL .= "null AS names,";
 506         $sSQL .= "  ST_x(st_centroid(geometry)) AS lon, ST_y(st_centroid(geometry)) AS lat,";
 507         $sSQL .=    $sImportanceSQLGeom."(0.75-(rank_search::float/40)) AS importance, ";
 508         $sSQL .= "  (";
 509         $sSQL .= "     SELECT max(p.importance*(p.rank_address+2))";
 510         $sSQL .= "     FROM ";
 511         $sSQL .= "       place_addressline s, ";
 512         $sSQL .= "       placex p";
 513         $sSQL .= "     WHERE s.place_id = lp.parent_place_id";
 514         $sSQL .= "       AND p.place_id = s.address_place_id ";
 515         $sSQL .= "       AND s.isaddress";
 516         $sSQL .= "       AND p.importance is not null";
 517         $sSQL .= "  ) AS addressimportance, ";
 518         $sSQL .= "  null AS extra_place ";
 519         $sSQL .= "FROM location_postcode lp";
 520         $sSQL .= " WHERE place_id in ($sPlaceIDs) ";
 521
 522         if (30 >= $this->iMinAddressRank && 30 <= $this->iMaxAddressRank) {
 523             // only Tiger housenumbers and interpolation lines need to be interpolated, because they are saved as lines
 524             // with start- and endnumber, the common osm housenumbers are usually saved as points
 525             $sHousenumbers = "";
 526             $i = 0;
 527             $length = count($aPlaceIDs);
 528             foreach ($aPlaceIDs as $placeID => $housenumber) {
 529                 $i++;
 530                 $sHousenumbers .= "(".$placeID.", ".$housenumber.")";
 531                 if ($i<$length) $sHousenumbers .= ", ";
 532             }
 533
 534             if (CONST_Use_US_Tiger_Data) {
 535                 // Tiger search only if a housenumber was searched and if it was found (i.e. aPlaceIDs[placeID] = housenumber != -1) (realized through a join)
 536                 $sSQL .= " union";
 537                 $sSQL .= " SELECT ";
 538                 $sSQL .= "     'T' AS osm_type, ";
 539                 $sSQL .= "     (SELECT osm_id from placex p WHERE p.place_id=min(blub.parent_place_id)) as osm_id, ";
 540                 $sSQL .= "     'place' AS class, ";
 541                 $sSQL .= "     'house' AS type, ";
 542                 $sSQL .= "     null AS admin_level, ";
 543                 $sSQL .= "     30 AS rank_search, ";
 544                 $sSQL .= "     30 AS rank_address, ";
 545                 $sSQL .= "     min(place_id) AS place_id, ";
 546                 $sSQL .= "     min(parent_place_id) AS parent_place_id, ";
 547                 $sSQL .= "     'us' AS country_code, ";
 548                 $sSQL .= "     get_address_by_language(place_id, housenumber_for_place, $sLanguagePrefArraySQL) AS langaddress,";
 549                 $sSQL .= "     null AS placename, ";
 550                 $sSQL .= "     null AS ref, ";
 551                 if ($this->bIncludeExtraTags) $sSQL .= "null AS extra,";
 552                 if ($this->bIncludeNameDetails) $sSQL .= "null AS names,";
 553                 $sSQL .= "     avg(st_x(centroid)) AS lon, ";
 554                 $sSQL .= "     avg(st_y(centroid)) AS lat,";
 555                 $sSQL .= "     ".$sImportanceSQL."-1.15 AS importance, ";
 556                 $sSQL .= "     (";
 557                 $sSQL .= "        SELECT max(p.importance*(p.rank_address+2))";
 558                 $sSQL .= "        FROM ";
 559                 $sSQL .= "          place_addressline s, ";
 560                 $sSQL .= "          placex p";
 561                 $sSQL .= "        WHERE s.place_id = min(blub.parent_place_id)";
 562                 $sSQL .= "          AND p.place_id = s.address_place_id ";
 563                 $sSQL .= "          AND s.isaddress";
 564                 $sSQL .= "          AND p.importance is not null";
 565                 $sSQL .= "     ) AS addressimportance, ";
 566                 $sSQL .= "     null AS extra_place ";
 567                 $sSQL .= " FROM (";
 568                 $sSQL .= "     SELECT place_id, ";    // interpolate the Tiger housenumbers here
 569                 $sSQL .= "         ST_LineInterpolatePoint(linegeo, (housenumber_for_place-startnumber::float)/(endnumber-startnumber)::float) AS centroid, ";
 570                 $sSQL .= "         parent_place_id, ";
 571                 $sSQL .= "         housenumber_for_place";
 572                 $sSQL .= "     FROM (";
 573                 $sSQL .= "            location_property_tiger ";
 574                 $sSQL .= "            JOIN (values ".$sHousenumbers.") AS housenumbers(place_id, housenumber_for_place) USING(place_id)) ";
 575                 $sSQL .= "     WHERE ";
 576                 $sSQL .= "         housenumber_for_place>=0";
 577                 $sSQL .= "         AND 30 between $this->iMinAddressRank AND $this->iMaxAddressRank";
 578                 $sSQL .= " ) AS blub"; //postgres wants an alias here
 579                 $sSQL .= " GROUP BY";
 580                 $sSQL .= "      place_id, ";
 581                 $sSQL .= "      housenumber_for_place"; //is this group by really needed?, place_id + housenumber (in combination) are unique
 582                 if (!$this->bDeDupe) $sSQL .= ", place_id ";
 583             }
 584             // osmline
 585             // interpolation line search only if a housenumber was searched and if it was found (i.e. aPlaceIDs[placeID] = housenumber != -1) (realized through a join)
 586             $sSQL .= " UNION ";
 587             $sSQL .= "SELECT ";
 588             $sSQL .= "  'W' AS osm_type, ";
 589             $sSQL .= "  osm_id, ";
 590             $sSQL .= "  'place' AS class, ";
 591             $sSQL .= "  'house' AS type, ";
 592             $sSQL .= "  null AS admin_level, ";
 593             $sSQL .= "  30 AS rank_search, ";
 594             $sSQL .= "  30 AS rank_address, ";
 595             $sSQL .= "  min(place_id) as place_id, ";
 596             $sSQL .= "  min(parent_place_id) AS parent_place_id, ";
 597             $sSQL .= "  country_code, ";
 598             $sSQL .= "  get_address_by_language(place_id, housenumber_for_place, $sLanguagePrefArraySQL) AS langaddress, ";
 599             $sSQL .= "  null AS placename, ";
 600             $sSQL .= "  null AS ref, ";
 601             if ($this->bIncludeExtraTags) $sSQL .= "null AS extra, ";
 602             if ($this->bIncludeNameDetails) $sSQL .= "null AS names, ";
 603             $sSQL .= "  AVG(st_x(centroid)) AS lon, ";
 604             $sSQL .= "  AVG(st_y(centroid)) AS lat, ";
 605             $sSQL .= "  ".$sImportanceSQL."-0.1 AS importance, ";  // slightly smaller than the importance for normal houses with rank 30, which is 0
 606             $sSQL .= "  (";
 607             $sSQL .= "     SELECT ";
 608             $sSQL .= "       MAX(p.importance*(p.rank_address+2)) ";
 609             $sSQL .= "     FROM";
 610             $sSQL .= "       place_addressline s, ";
 611             $sSQL .= "       placex p";
 612             $sSQL .= "     WHERE s.place_id = min(blub.parent_place_id) ";
 613             $sSQL .= "       AND p.place_id = s.address_place_id ";
 614             $sSQL .= "       AND s.isaddress ";
 615             $sSQL .= "       AND p.importance is not null";
 616             $sSQL .= "  ) AS addressimportance,";
 617             $sSQL .= "  null AS extra_place ";
 618             $sSQL .= "  FROM (";
 619             $sSQL .= "     SELECT ";
 620             $sSQL .= "         osm_id, ";
 621             $sSQL .= "         place_id, ";
 622             $sSQL .= "         country_code, ";
 623             $sSQL .= "         CASE ";             // interpolate the housenumbers here
 624             $sSQL .= "           WHEN startnumber != endnumber ";
 625             $sSQL .= "           THEN ST_LineInterpolatePoint(linegeo, (housenumber_for_place-startnumber::float)/(endnumber-startnumber)::float) ";
 626             $sSQL .= "           ELSE ST_LineInterpolatePoint(linegeo, 0.5) ";
 627             $sSQL .= "         END as centroid, ";
 628             $sSQL .= "         parent_place_id, ";
 629             $sSQL .= "         housenumber_for_place ";
 630             $sSQL .= "     FROM (";
 631             $sSQL .= "            location_property_osmline ";
 632             $sSQL .= "            JOIN (values ".$sHousenumbers.") AS housenumbers(place_id, housenumber_for_place) USING(place_id)";
 633             $sSQL .= "          ) ";
 634             $sSQL .= "     WHERE housenumber_for_place>=0 ";
 635             $sSQL .= "       AND 30 between $this->iMinAddressRank AND $this->iMaxAddressRank";
 636             $sSQL .= "  ) as blub"; //postgres wants an alias here
 637             $sSQL .= "  GROUP BY ";
 638             $sSQL .= "    osm_id, ";
 639             $sSQL .= "    place_id, ";
 640             $sSQL .= "    housenumber_for_place, ";
 641             $sSQL .= "    country_code "; //is this group by really needed?, place_id + housenumber (in combination) are unique
 642             if (!$this->bDeDupe) $sSQL .= ", place_id ";
 643
 644             if (CONST_Use_Aux_Location_data) {
 645                 $sSQL .= " UNION ";
 646                 $sSQL .= "  SELECT ";
 647                 $sSQL .= "     'L' AS osm_type, ";
 648                 $sSQL .= "     place_id AS osm_id, ";
 649                 $sSQL .= "     'place' AS class,";
 650                 $sSQL .= "     'house' AS type, ";
 651                 $sSQL .= "     null AS admin_level, ";
 652                 $sSQL .= "     0 AS rank_search,";
 653                 $sSQL .= "     0 AS rank_address, ";
 654                 $sSQL .= "     min(place_id) AS place_id,";
 655                 $sSQL .= "     min(parent_place_id) AS parent_place_id, ";
 656                 $sSQL .= "     'us' AS country_code, ";
 657                 $sSQL .= "     get_address_by_language(place_id, -1, $sLanguagePrefArraySQL) AS langaddress, ";
 658                 $sSQL .= "     null AS placename, ";
 659                 $sSQL .= "     null AS ref, ";
 660                 if ($this->bIncludeExtraTags) $sSQL .= "null AS extra, ";
 661                 if ($this->bIncludeNameDetails) $sSQL .= "null AS names, ";
 662                 $sSQL .= "     avg(ST_X(centroid)) AS lon, ";
 663                 $sSQL .= "     avg(ST_Y(centroid)) AS lat, ";
 664                 $sSQL .= "     ".$sImportanceSQL."-1.10 AS importance, ";
 665                 $sSQL .= "     ( ";
 666                 $sSQL .= "       SELECT max(p.importance*(p.rank_address+2))";
 667                 $sSQL .= "       FROM ";
 668                 $sSQL .= "          place_addressline s, ";
 669                 $sSQL .= "          placex p";
 670                 $sSQL .= "       WHERE s.place_id = min(location_property_aux.parent_place_id)";
 671                 $sSQL .= "         AND p.place_id = s.address_place_id ";
 672                 $sSQL .= "         AND s.isaddress";
 673                 $sSQL .= "         AND p.importance is not null";
 674                 $sSQL .= "     ) AS addressimportance, ";
 675                 $sSQL .= "     null AS extra_place ";
 676                 $sSQL .= "  FROM location_property_aux ";
 677                 $sSQL .= "  WHERE place_id in ($sPlaceIDs) ";
 678                 $sSQL .= "    AND 30 between $this->iMinAddressRank and $this->iMaxAddressRank ";
 679                 $sSQL .= "  GROUP BY ";
 680                 $sSQL .= "     place_id, ";
 681                 if (!$this->bDeDupe) $sSQL .= "place_id, ";
 682                 $sSQL .= "     get_address_by_language(place_id, -1, $sLanguagePrefArraySQL) ";
 683             }
 684         }
 685
 686         $sSQL .= " order by importance desc";
 687         if (CONST_Debug) {
 688             echo "<hr>";
 689             var_dump($sSQL);
 690         }
 691         $aSearchResults = chksql(
 692             $this->oDB->getAll($sSQL),
 693             "Could not get details for place."
 694         );
 695
 696         return $aSearchResults;
 697     }
 698
 699     public function getGroupedSearches($aSearches, $aPhraseTypes, $aPhrases, $aValidTokens, $aWordFrequencyScores, $bStructuredPhrases, $sNormQuery)
 700     {
 701         /*
 702              Calculate all searches using aValidTokens i.e.
 703              'Wodsworth Road, Sheffield' =>
 704
 705              Phrase Wordset
 706              0      0       (wodsworth road)
 707              0      1       (wodsworth)(road)
 708              1      0       (sheffield)
 709
 710              Score how good the search is so they can be ordered
 711          */
 712         foreach ($aPhrases as $iPhrase => $aPhrase) {
 713             $aNewPhraseSearches = array();
 714             if ($bStructuredPhrases) $sPhraseType = $aPhraseTypes[$iPhrase];
 715             else $sPhraseType = '';
 716
 717             foreach ($aPhrase['wordsets'] as $iWordSet => $aWordset) {
 718                 // Too many permutations - too expensive
 719                 if ($iWordSet > 120) break;
 720
 721                 $aWordsetSearches = $aSearches;
 722
 723                 // Add all words from this wordset
 724                 foreach ($aWordset as $iToken => $sToken) {
 725                     //echo "<br><b>$sToken</b>";
 726                     $aNewWordsetSearches = array();
 727
 728                     foreach ($aWordsetSearches as $aCurrentSearch) {
 729                         //echo "<i>";
 730                         //var_dump($aCurrentSearch);
 731                         //echo "</i>";
 732
 733                         // If the token is valid
 734                         if (isset($aValidTokens[' '.$sToken])) {
 735                             // TODO variable should go into aCurrentSearch
 736                             $bHavePostcode = false;
 737                             foreach ($aValidTokens[' '.$sToken] as $aSearchTerm) {
 738                                 $aSearch = $aCurrentSearch;
 739                                 $aSearch['iSearchRank']++;
 740                                 if (($sPhraseType == '' || $sPhraseType == 'country') && !empty($aSearchTerm['country_code']) && $aSearchTerm['country_code'] != '0') {
 741                                     if ($aSearch['sCountryCode'] === false) {
 742                                         $aSearch['sCountryCode'] = strtolower($aSearchTerm['country_code']);
 743                                         // Country is almost always at the end of the string - increase score for finding it anywhere else (optimisation)
 744                                         if (($iToken+1 != sizeof($aWordset) || $iPhrase+1 != sizeof($aPhrases))) {
 745                                             $aSearch['iSearchRank'] += 5;
 746                                         }
 747                                         if ($aSearch['iSearchRank'] < $this->iMaxRank) $aNewWordsetSearches[] = $aSearch;
 748                                     }
 749                                 } elseif (($sPhraseType == '' || $sPhraseType == 'postalcode') && $aSearchTerm['class'] == 'place' && $aSearchTerm['type'] == 'postcode') {
 750                                     // We need to try the case where the postal code is the primary element (i.e. no way to tell if it is (postalcode, city) OR (city, postalcode) so try both
 751                                     if (!$bHavePostcode && $aSearch['sPostcode'] === '' && $aSearch['sHouseNumber'] === '' &&
 752                                         isset($aSearchTerm['word']) && $aSearchTerm['word'] && strpos($sNormQuery, $this->normTerm($aSearchTerm['word'])) !== false) {
 753                                         // If we have structured search or this is the first term,
 754                                         // make the postcode the primary search element.
 755                                         if ($aSearch['sOperator'] === '' && ($sPhraseType == 'postalcode' || ($iToken == 0 && $iPhrase == 0))) {
 756                                             $aNewSearch = $aSearch;
 757                                             $aNewSearch['sOperator'] = 'postcode';
 758                                             $aNewSearch['aAddress'] = array_merge($aNewSearch['aAddress'], $aNewSearch['aName']);
 759                                             $aNewSearch['aName'] = array($aSearchTerm['word_id'] => $aSearchTerm['word']);
 760                                             if ($aSearch['iSearchRank'] < $this->iMaxRank) $aNewWordsetSearches[] = $aNewSearch;
 761                                             $bHavePostcode = true;
 762                                         }
 763
 764                                         // If we have a structured search or this is not the first term,
 765                                         // add the postcode as an addendum.
 766                                         if ($aSearch['sOperator'] !== 'postcode' && ($sPhraseType == 'postalcode' || sizeof($aSearch['aName']))) {
 767                                             $aSearch['sPostcode'] = $aSearchTerm['word'];
 768                                             if ($aSearch['iSearchRank'] < $this->iMaxRank) $aNewWordsetSearches[] = $aSearch;
 769                                         }
 770                                     }
 771                                 } elseif (($sPhraseType == '' || $sPhraseType == 'street') && $aSearchTerm['class'] == 'place' && $aSearchTerm['type'] == 'house') {
 772                                     if ($aSearch['sHouseNumber'] === '' && $aSearch['sOperator'] !== 'postcode') {
 773                                         $aSearch['sHouseNumber'] = $sToken;
 774                                         // sanity check: if the housenumber is not mainly made
 775                                         // up of numbers, add a penalty
 776                                         if (preg_match_all("/[^0-9]/", $sToken, $aMatches) > 2) $aSearch['iSearchRank']++;
 777                                         // also housenumbers should appear in the first or second phrase
 778                                         if ($iPhrase > 1) $aSearch['iSearchRank'] += 1;
 779                                         if ($aSearch['iSearchRank'] < $this->iMaxRank) $aNewWordsetSearches[] = $aSearch;
 780                                         /*
 781                                         // Fall back to not searching for this item (better than nothing)
 782                                         $aSearch = $aCurrentSearch;
 783                                         $aSearch['iSearchRank'] += 1;
 784                                         if ($aSearch['iSearchRank'] < $this->iMaxRank) $aNewWordsetSearches[] = $aSearch;
 785                                          */
 786                                     }
 787                                 } elseif ($sPhraseType == '' && $aSearchTerm['class'] !== '' && $aSearchTerm['class'] !== null) {
 788                                     // require a normalized exact match of the term
 789                                     // if we have the normalizer version of the query
 790                                     // available
 791                                     if ($aSearch['sOperator'] === ''
 792                                         && ($sNormQuery === null || !($aSearchTerm['word'] && strpos($sNormQuery, $aSearchTerm['word']) === false))) {
 793                                         $aSearch['sClass'] = $aSearchTerm['class'];
 794                                         $aSearch['sType'] = $aSearchTerm['type'];
 795                                         if ($aSearchTerm['operator'] == '') {
 796                                             $aSearch['sOperator'] = sizeof($aSearch['aName']) ? 'name' :  'near';
 797                                             $aSearch['iSearchRank'] += 2;
 798                                         } else {
 799                                             $aSearch['sOperator'] = 'near'; // near = in for the moment
 800                                         }
 801
 802                                         if ($aSearch['iSearchRank'] < $this->iMaxRank) $aNewWordsetSearches[] = $aSearch;
 803                                     }
 804                                 } elseif (isset($aSearchTerm['word_id']) && $aSearchTerm['word_id']) {
 805                                     if (sizeof($aSearch['aName'])) {
 806                                         if ((!$bStructuredPhrases || $iPhrase > 0) && $sPhraseType != 'country' && (!isset($aValidTokens[$sToken]) || strpos($sToken, ' ') !== false)) {
 807                                             $aSearch['aAddress'][$aSearchTerm['word_id']] = $aSearchTerm['word_id'];
 808                                         } else {
 809                                             $aCurrentSearch['aFullNameAddress'][$aSearchTerm['word_id']] = $aSearchTerm['word_id'];
 810                                             $aSearch['iSearchRank'] += 1000; // skip;
 811                                         }
 812                                     } else {
 813                                         $aSearch['aName'][$aSearchTerm['word_id']] = $aSearchTerm['word_id'];
 814                                         //$aSearch['iNamePhrase'] = $iPhrase;
 815                                     }
 816                                     if ($aSearch['iSearchRank'] < $this->iMaxRank) $aNewWordsetSearches[] = $aSearch;
 817                                 }
 818                             }
 819                         }
 820                         // Look for partial matches.
 821                         // Note that there is no point in adding country terms here
 822                         // because country are omitted in the address.
 823                         if (isset($aValidTokens[$sToken]) && $sPhraseType != 'country') {
 824                             // Allow searching for a word - but at extra cost
 825                             foreach ($aValidTokens[$sToken] as $aSearchTerm) {
 826                                 if (isset($aSearchTerm['word_id']) && $aSearchTerm['word_id']) {
 827                                     if ((!$bStructuredPhrases || $iPhrase > 0) && sizeof($aCurrentSearch['aName']) && strpos($sToken, ' ') === false) {
 828                                         $aSearch = $aCurrentSearch;
 829                                         $aSearch['iSearchRank'] += 1;
 830                                         if ($aWordFrequencyScores[$aSearchTerm['word_id']] < CONST_Max_Word_Frequency) {
 831                                             $aSearch['aAddress'][$aSearchTerm['word_id']] = $aSearchTerm['word_id'];
 832                                             if ($aSearch['iSearchRank'] < $this->iMaxRank) $aNewWordsetSearches[] = $aSearch;
 833                                         } elseif (isset($aValidTokens[' '.$sToken])) { // revert to the token version?
 834                                             $aSearch['aAddressNonSearch'][$aSearchTerm['word_id']] = $aSearchTerm['word_id'];
 835                                             $aSearch['iSearchRank'] += 1;
 836                                             if ($aSearch['iSearchRank'] < $this->iMaxRank) $aNewWordsetSearches[] = $aSearch;
 837                                             foreach ($aValidTokens[' '.$sToken] as $aSearchTermToken) {
 838                                                 if (empty($aSearchTermToken['country_code'])
 839                                                     && empty($aSearchTermToken['lat'])
 840                                                     && empty($aSearchTermToken['class'])
 841                                                 ) {
 842                                                     $aSearch = $aCurrentSearch;
 843                                                     $aSearch['iSearchRank'] += 1;
 844                                                     $aSearch['aAddress'][$aSearchTermToken['word_id']] = $aSearchTermToken['word_id'];
 845                                                     if ($aSearch['iSearchRank'] < $this->iMaxRank) $aNewWordsetSearches[] = $aSearch;
 846                                                 }
 847                                             }
 848                                         } else {
 849                                             $aSearch['aAddressNonSearch'][$aSearchTerm['word_id']] = $aSearchTerm['word_id'];
 850                                             if (preg_match('#^[0-9]+$#', $sToken)) $aSearch['iSearchRank'] += 2;
 851                                             if ($aSearch['iSearchRank'] < $this->iMaxRank) $aNewWordsetSearches[] = $aSearch;
 852                                         }
 853                                     }
 854
 855                                     if (!sizeof($aCurrentSearch['aName']) || $aCurrentSearch['iNamePhrase'] == $iPhrase) {
 856                                         $aSearch = $aCurrentSearch;
 857                                         $aSearch['iSearchRank'] += 1;
 858                                         if (!sizeof($aCurrentSearch['aName'])) $aSearch['iSearchRank'] += 1;
 859                                         if (preg_match('#^[0-9]+$#', $sToken)) $aSearch['iSearchRank'] += 2;
 860                                         if ($aWordFrequencyScores[$aSearchTerm['word_id']] < CONST_Max_Word_Frequency) {
 861                                             $aSearch['aName'][$aSearchTerm['word_id']] = $aSearchTerm['word_id'];
 862                                         } else {
 863                                             $aSearch['aNameNonSearch'][$aSearchTerm['word_id']] = $aSearchTerm['word_id'];
 864                                         }
 865                                         $aSearch['iNamePhrase'] = $iPhrase;
 866                                         if ($aSearch['iSearchRank'] < $this->iMaxRank) $aNewWordsetSearches[] = $aSearch;
 867                                     }
 868                                 }
 869                             }
 870                         } else {
 871                             // Allow skipping a word - but at EXTREAM cost
 872                             //$aSearch = $aCurrentSearch;
 873                             //$aSearch['iSearchRank']+=100;
 874                             //$aNewWordsetSearches[] = $aSearch;
 875                         }
 876                     }
 877                     // Sort and cut
 878                     usort($aNewWordsetSearches, 'bySearchRank');
 879                     $aWordsetSearches = array_slice($aNewWordsetSearches, 0, 50);
 880                 }
 881                 //var_Dump('<hr>',sizeof($aWordsetSearches)); exit;
 882
 883                 $aNewPhraseSearches = array_merge($aNewPhraseSearches, $aNewWordsetSearches);
 884                 usort($aNewPhraseSearches, 'bySearchRank');
 885
 886                 $aSearchHash = array();
 887                 foreach ($aNewPhraseSearches as $iSearch => $aSearch) {
 888                     $sHash = serialize($aSearch);
 889                     if (isset($aSearchHash[$sHash])) unset($aNewPhraseSearches[$iSearch]);
 890                     else $aSearchHash[$sHash] = 1;
 891                 }
 892
 893                 $aNewPhraseSearches = array_slice($aNewPhraseSearches, 0, 50);
 894             }
 895
 896             // Re-group the searches by their score, junk anything over 20 as just not worth trying
 897             $aGroupedSearches = array();
 898             foreach ($aNewPhraseSearches as $aSearch) {
 899                 if ($aSearch['iSearchRank'] < $this->iMaxRank) {
 900                     if (!isset($aGroupedSearches[$aSearch['iSearchRank']])) $aGroupedSearches[$aSearch['iSearchRank']] = array();
 901                     $aGroupedSearches[$aSearch['iSearchRank']][] = $aSearch;
 902                 }
 903             }
 904             ksort($aGroupedSearches);
 905
 906             $iSearchCount = 0;
 907             $aSearches = array();
 908             foreach ($aGroupedSearches as $iScore => $aNewSearches) {
 909                 $iSearchCount += sizeof($aNewSearches);
 910                 $aSearches = array_merge($aSearches, $aNewSearches);
 911                 if ($iSearchCount > 50) break;
 912             }
 913
 914             //if (CONST_Debug) _debugDumpGroupedSearches($aGroupedSearches, $aValidTokens);
 915         }
 916
 917         // Revisit searches, giving penalty to unlikely combinations
 918         $aGroupedSearches = array();
 919         foreach ($aSearches as $aSearch) {
 920             if (!$aSearch['aName']) {
 921                 if ($aSearch['sHouseNumber']) {
 922                     continue;
 923                 }
 924             }
 925             $aGroupedSearches[$aSearch['iSearchRank']][] = $aSearch;
 926         }
 927         ksort($aGroupedSearches);
 928
 929         return $aGroupedSearches;
 930     }
 931
 932     /* Perform the actual query lookup.
 933
 934         Returns an ordered list of results, each with the following fields:
 935             osm_type: type of corresponding OSM object
 936                         N - node
 937                         W - way
 938                         R - relation
 939                         P - postcode (internally computed)
 940             osm_id: id of corresponding OSM object
 941             class: general object class (corresponds to tag key of primary OSM tag)
 942             type: subclass of object (corresponds to tag value of primary OSM tag)
 943             admin_level: see http://wiki.openstreetmap.org/wiki/Admin_level
 944             rank_search: rank in search hierarchy
 945                         (see also http://wiki.openstreetmap.org/wiki/Nominatim/Development_overview#Country_to_street_level)
 946             rank_address: rank in address hierarchy (determines orer in address)
 947             place_id: internal key (may differ between different instances)
 948             country_code: ISO country code
 949             langaddress: localized full address
 950             placename: localized name of object
 951             ref: content of ref tag (if available)
 952             lon: longitude
 953             lat: latitude
 954             importance: importance of place based on Wikipedia link count
 955             addressimportance: cumulated importance of address elements
 956             extra_place: type of place (for admin boundaries, if there is a place tag)
 957             aBoundingBox: bounding Box
 958             label: short description of the object class/type (English only)
 959             name: full name (currently the same as langaddress)
 960             foundorder: secondary ordering for places with same importance
 961     */
 962
 963
 964     public function lookup()
 965     {
 966         if (!$this->sQuery && !$this->aStructuredQuery) return array();
 967
 968         $sNormQuery = $this->normTerm($this->sQuery);
 969         $sLanguagePrefArraySQL = "ARRAY[".join(',', array_map("getDBQuoted", $this->aLangPrefOrder))."]";
 970         $sCountryCodesSQL = false;
 971         if ($this->aCountryCodes) {
 972             $sCountryCodesSQL = join(',', array_map('addQuotes', $this->aCountryCodes));
 973         }
 974
 975         $sQuery = $this->sQuery;
 976         if (!preg_match('//u', $sQuery)) {
 977             userError("Query string is not UTF-8 encoded.");
 978         }
 979
 980         // Conflicts between US state abreviations and various words for 'the' in different languages
 981         if (isset($this->aLangPrefOrder['name:en'])) {
 982             $sQuery = preg_replace('/(^|,)\s*il\s*(,|$)/', '\1illinois\2', $sQuery);
 983             $sQuery = preg_replace('/(^|,)\s*al\s*(,|$)/', '\1alabama\2', $sQuery);
 984             $sQuery = preg_replace('/(^|,)\s*la\s*(,|$)/', '\1louisiana\2', $sQuery);
 985         }
 986
 987         $bBoundingBoxSearch = $this->bBoundedSearch && $this->sViewboxSmallSQL;
 988         if ($this->sViewboxCentreSQL) {
 989             // For complex viewboxes (routes) precompute the bounding geometry
 990             $sGeom = chksql(
 991                 $this->oDB->getOne("select ".$this->sViewboxSmallSQL),
 992                 "Could not get small viewbox"
 993             );
 994             $this->sViewboxSmallSQL = "'".$sGeom."'::geometry";
 995
 996             $sGeom = chksql(
 997                 $this->oDB->getOne("select ".$this->sViewboxLargeSQL),
 998                 "Could not get large viewbox"
 999             );
1000             $this->sViewboxLargeSQL = "'".$sGeom."'::geometry";
1001         }
1002
1003         // Do we have anything that looks like a lat/lon pair?
1004         $oNearPoint = false;
1005         if ($aLooksLike = NearPoint::extractFromQuery($sQuery)) {
1006             $oNearPoint = $aLooksLike['pt'];
1007             $sQuery = $aLooksLike['query'];
1008         }
1009
1010         $aSearchResults = array();
1011         if ($sQuery || $this->aStructuredQuery) {
1012             // Start with a blank search
1013             $aSearches = array(
1014                           array(
1015                            'iSearchRank' => 0,
1016                            'iNamePhrase' => -1,
1017                            'sCountryCode' => false,
1018                            'aName' => array(),
1019                            'aAddress' => array(),
1020                            'aFullNameAddress' => array(),
1021                            'aNameNonSearch' => array(),
1022                            'aAddressNonSearch' => array(),
1023                            'sOperator' => '',
1024                            'aFeatureName' => array(),
1025                            'sClass' => '',
1026                            'sType' => '',
1027                            'sHouseNumber' => '',
1028                            'sPostcode' => '',
1029                            'oNear' => $oNearPoint
1030                           )
1031                          );
1032
1033             // Any 'special' terms in the search?
1034             $bSpecialTerms = false;
1035             preg_match_all('/\\[([\\w_]*)=([\\w_]*)\\]/', $sQuery, $aSpecialTermsRaw, PREG_SET_ORDER);
1036             foreach ($aSpecialTermsRaw as $aSpecialTerm) {
1037                 $sQuery = str_replace($aSpecialTerm[0], ' ', $sQuery);
1038                 if (!$bSpecialTerms) {
1039                     $aNewSearches = array();
1040                     foreach ($aSearches as $aSearch) {
1041                         $aNewSearch = $aSearch;
1042                         $aNewSearch['sClass'] = $aSpecialTerm[1];
1043                         $aNewSearch['sType'] = $aSpecialTerm[2];
1044                         $aNewSearches[] = $aNewSearch;
1045                     }
1046
1047                     $aSearches = $aNewSearches;
1048                     $bSpecialTerms = true;
1049                 }
1050             }
1051
1052             preg_match_all('/\\[([\\w ]*)\\]/u', $sQuery, $aSpecialTermsRaw, PREG_SET_ORDER);
1053             if (isset($this->aStructuredQuery['amenity']) && $this->aStructuredQuery['amenity']) {
1054                 $aSpecialTermsRaw[] = array('['.$this->aStructuredQuery['amenity'].']', $this->aStructuredQuery['amenity']);
1055                 unset($this->aStructuredQuery['amenity']);
1056             }
1057
1058             foreach ($aSpecialTermsRaw as $aSpecialTerm) {
1059                 $sQuery = str_replace($aSpecialTerm[0], ' ', $sQuery);
1060                 if ($bSpecialTerms) {
1061                     continue;
1062                 }
1063
1064                 $sToken = chksql($this->oDB->getOne("SELECT make_standard_name('".$aSpecialTerm[1]."') AS string"));
1065                 $sSQL = 'SELECT * ';
1066                 $sSQL .= 'FROM ( ';
1067                 $sSQL .= '   SELECT word_id, word_token, word, class, type, country_code, operator';
1068                 $sSQL .= '   FROM word ';
1069                 $sSQL .= '   WHERE word_token in (\' '.$sToken.'\')';
1070                 $sSQL .= ') AS x ';
1071                 $sSQL .= ' WHERE (class is not null AND class not in (\'place\'))';
1072                 if (CONST_Debug) var_Dump($sSQL);
1073                 $aSearchWords = chksql($this->oDB->getAll($sSQL));
1074                 $aNewSearches = array();
1075                 foreach ($aSearches as $aSearch) {
1076                     foreach ($aSearchWords as $aSearchTerm) {
1077                         $aNewSearch = $aSearch;
1078                         $aNewSearch['sClass'] = $aSearchTerm['class'];
1079                         $aNewSearch['sType'] = $aSearchTerm['type'];
1080                         $aNewSearches[] = $aNewSearch;
1081                         $bSpecialTerms = true;
1082                     }
1083                 }
1084                 $aSearches = $aNewSearches;
1085             }
1086
1087             // Split query into phrases
1088             // Commas are used to reduce the search space by indicating where phrases split
1089             if ($this->aStructuredQuery) {
1090                 $aPhrases = $this->aStructuredQuery;
1091                 $bStructuredPhrases = true;
1092             } else {
1093                 $aPhrases = explode(',', $sQuery);
1094                 $bStructuredPhrases = false;
1095             }
1096
1097             // Convert each phrase to standard form
1098             // Create a list of standard words
1099             // Get all 'sets' of words
1100             // Generate a complete list of all
1101             $aTokens = array();
1102             foreach ($aPhrases as $iPhrase => $sPhrase) {
1103                 $aPhrase = chksql(
1104                     $this->oDB->getRow("SELECT make_standard_name('".pg_escape_string($sPhrase)."') as string"),
1105                     "Cannot normalize query string (is it a UTF-8 string?)"
1106                 );
1107                 if (trim($aPhrase['string'])) {
1108                     $aPhrases[$iPhrase] = $aPhrase;
1109                     $aPhrases[$iPhrase]['words'] = explode(' ', $aPhrases[$iPhrase]['string']);
1110                     $aPhrases[$iPhrase]['wordsets'] = getWordSets($aPhrases[$iPhrase]['words'], 0);
1111                     $aTokens = array_merge($aTokens, getTokensFromSets($aPhrases[$iPhrase]['wordsets']));
1112                 } else {
1113                     unset($aPhrases[$iPhrase]);
1114                 }
1115             }
1116
1117             // Reindex phrases - we make assumptions later on that they are numerically keyed in order
1118             $aPhraseTypes = array_keys($aPhrases);
1119             $aPhrases = array_values($aPhrases);
1120
1121             if (sizeof($aTokens)) {
1122                 // Check which tokens we have, get the ID numbers
1123                 $sSQL = 'SELECT word_id, word_token, word, class, type, country_code, operator, search_name_count';
1124                 $sSQL .= ' FROM word ';
1125                 $sSQL .= ' WHERE word_token in ('.join(',', array_map("getDBQuoted", $aTokens)).')';
1126
1127                 if (CONST_Debug) var_Dump($sSQL);
1128
1129                 $aValidTokens = array();
1130                 $aDatabaseWords = chksql(
1131                     $this->oDB->getAll($sSQL),
1132                     "Could not get word tokens."
1133                 );
1134                 $aPossibleMainWordIDs = array();
1135                 $aWordFrequencyScores = array();
1136                 foreach ($aDatabaseWords as $aToken) {
1137                     // Very special case - require 2 letter country param to match the country code found
1138                     if ($bStructuredPhrases && $aToken['country_code'] && !empty($this->aStructuredQuery['country'])
1139                         && strlen($this->aStructuredQuery['country']) == 2 && strtolower($this->aStructuredQuery['country']) != $aToken['country_code']
1140                     ) {
1141                         continue;
1142                     }
1143
1144                     if (isset($aValidTokens[$aToken['word_token']])) {
1145                         $aValidTokens[$aToken['word_token']][] = $aToken;
1146                     } else {
1147                         $aValidTokens[$aToken['word_token']] = array($aToken);
1148                     }
1149                     if (!$aToken['class'] && !$aToken['country_code']) $aPossibleMainWordIDs[$aToken['word_id']] = 1;
1150                     $aWordFrequencyScores[$aToken['word_id']] = $aToken['search_name_count'] + 1;
1151                 }
1152                 if (CONST_Debug) var_Dump($aPhrases, $aValidTokens);
1153
1154                 // US ZIP+4 codes - if there is no token, merge in the 5-digit ZIP code
1155                 foreach ($aTokens as $sToken) {
1156                     if (!isset($aValidTokens[$sToken]) && preg_match('/^([0-9]{5}) [0-9]{4}$/', $sToken, $aData)) {
1157                         if (isset($aValidTokens[$aData[1]])) {
1158                             foreach ($aValidTokens[$aData[1]] as $aToken) {
1159                                 if (!$aToken['class']) {
1160                                     if (isset($aValidTokens[$sToken])) {
1161                                         $aValidTokens[$sToken][] = $aToken;
1162                                     } else {
1163                                         $aValidTokens[$sToken] = array($aToken);
1164                                     }
1165                                 }
1166                             }
1167                         }
1168                     }
1169                 }
1170
1171                 foreach ($aTokens as $sToken) {
1172                     // Unknown single word token with a number - assume it is a house number
1173                     if (!isset($aValidTokens[' '.$sToken]) && strpos($sToken, ' ') === false && preg_match('/[0-9]/', $sToken)) {
1174                         $aValidTokens[' '.$sToken] = array(array('class' => 'place', 'type' => 'house'));
1175                     }
1176                 }
1177
1178                 // Any words that have failed completely?
1179                 // TODO: suggestions
1180
1181                 // Start the search process
1182                 // array with: placeid => -1 | tiger-housenumber
1183                 $aResultPlaceIDs = array();
1184
1185                 $aGroupedSearches = $this->getGroupedSearches($aSearches, $aPhraseTypes, $aPhrases, $aValidTokens, $aWordFrequencyScores, $bStructuredPhrases, $sNormQuery);
1186
1187                 if ($this->bReverseInPlan) {
1188                     // Reverse phrase array and also reverse the order of the wordsets in
1189                     // the first and final phrase. Don't bother about phrases in the middle
1190                     // because order in the address doesn't matter.
1191                     $aPhrases = array_reverse($aPhrases);
1192                     $aPhrases[0]['wordsets'] = getInverseWordSets($aPhrases[0]['words'], 0);
1193                     if (sizeof($aPhrases) > 1) {
1194                         $aFinalPhrase = end($aPhrases);
1195                         $aPhrases[sizeof($aPhrases)-1]['wordsets'] = getInverseWordSets($aFinalPhrase['words'], 0);
1196                     }
1197                     $aReverseGroupedSearches = $this->getGroupedSearches($aSearches, null, $aPhrases, $aValidTokens, $aWordFrequencyScores, false, $sNormQuery);
1198
1199                     foreach ($aGroupedSearches as $aSearches) {
1200                         foreach ($aSearches as $aSearch) {
1201                             if ($aSearch['iSearchRank'] < $this->iMaxRank) {
1202                                 if (!isset($aReverseGroupedSearches[$aSearch['iSearchRank']])) $aReverseGroupedSearches[$aSearch['iSearchRank']] = array();
1203                                 $aReverseGroupedSearches[$aSearch['iSearchRank']][] = $aSearch;
1204                             }
1205                         }
1206                     }
1207
1208                     $aGroupedSearches = $aReverseGroupedSearches;
1209                     ksort($aGroupedSearches);
1210                 }
1211             } else {
1212                 // Re-group the searches by their score, junk anything over 20 as just not worth trying
1213                 $aGroupedSearches = array();
1214                 foreach ($aSearches as $aSearch) {
1215                     if ($aSearch['iSearchRank'] < $this->iMaxRank) {
1216                         if (!isset($aGroupedSearches[$aSearch['iSearchRank']])) $aGroupedSearches[$aSearch['iSearchRank']] = array();
1217                         $aGroupedSearches[$aSearch['iSearchRank']][] = $aSearch;
1218                     }
1219                 }
1220                 ksort($aGroupedSearches);
1221             }
1222
1223             if (CONST_Search_TryDroppedAddressTerms && sizeof($this->aStructuredQuery) > 0) {
1224                 $aCopyGroupedSearches = $aGroupedSearches;
1225                 foreach ($aCopyGroupedSearches as $iGroup => $aSearches) {
1226                     foreach ($aSearches as $iSearch => $aSearch) {
1227                         $aReductionsList = array($aSearch['aAddress']);
1228                         $iSearchRank = $aSearch['iSearchRank'];
1229                         while (sizeof($aReductionsList) > 0) {
1230                             $iSearchRank += 5;
1231                             if ($iSearchRank > iMaxRank) break 3;
1232                             $aNewReductionsList = array();
1233                             foreach ($aReductionsList as $aReductionsWordList) {
1234                                 for ($iReductionWord = 0; $iReductionWord < sizeof($aReductionsWordList); $iReductionWord++) {
1235                                     $aReductionsWordListResult = array_merge(array_slice($aReductionsWordList, 0, $iReductionWord), array_slice($aReductionsWordList, $iReductionWord+1));
1236                                     $aReverseSearch = $aSearch;
1237                                     $aSearch['aAddress'] = $aReductionsWordListResult;
1238                                     $aSearch['iSearchRank'] = $iSearchRank;
1239                                     $aGroupedSearches[$iSearchRank][] = $aReverseSearch;
1240                                     if (sizeof($aReductionsWordListResult) > 0) {
1241                                         $aNewReductionsList[] = $aReductionsWordListResult;
1242                                     }
1243                                 }
1244                             }
1245                             $aReductionsList = $aNewReductionsList;
1246                         }
1247                     }
1248                 }
1249                 ksort($aGroupedSearches);
1250             }
1251
1252             // Filter out duplicate searches
1253             $aSearchHash = array();
1254             foreach ($aGroupedSearches as $iGroup => $aSearches) {
1255                 foreach ($aSearches as $iSearch => $aSearch) {
1256                     $sHash = serialize($aSearch);
1257                     if (isset($aSearchHash[$sHash])) {
1258                         unset($aGroupedSearches[$iGroup][$iSearch]);
1259                         if (sizeof($aGroupedSearches[$iGroup]) == 0) unset($aGroupedSearches[$iGroup]);
1260                     } else {
1261                         $aSearchHash[$sHash] = 1;
1262                     }
1263                 }
1264             }
1265
1266             if (CONST_Debug) _debugDumpGroupedSearches($aGroupedSearches, $aValidTokens);
1267
1268             $iGroupLoop = 0;
1269             $iQueryLoop = 0;
1270             foreach ($aGroupedSearches as $iGroupedRank => $aSearches) {
1271                 $iGroupLoop++;
1272                 foreach ($aSearches as $aSearch) {
1273                     $iQueryLoop++;
1274                     $searchedHousenumber = -1;
1275
1276                     if (CONST_Debug) echo "<hr><b>Search Loop, group $iGroupLoop, loop $iQueryLoop</b>";
1277                     if (CONST_Debug) _debugDumpGroupedSearches(array($iGroupedRank => array($aSearch)), $aValidTokens);
1278
1279                     if ($sCountryCodesSQL && $aSearch['sCountryCode'] && !in_array($aSearch['sCountryCode'], $this->aCountryCodes)) {
1280                         continue;
1281                     }
1282
1283                     // No location term?
1284                     if (!sizeof($aSearch['aName']) && !sizeof($aSearch['aAddress'])) {
1285                         if ($aSearch['sCountryCode'] && !$aSearch['sClass'] && !$aSearch['sHouseNumber'] && !$aSearch['oNear']) {
1286                             // Just looking for a country by code - look it up
1287                             if (4 >= $this->iMinAddressRank && 4 <= $this->iMaxAddressRank) {
1288                                 $sSQL = "SELECT place_id FROM placex WHERE country_code='".$aSearch['sCountryCode']."' AND rank_search = 4";
1289                                 if ($bBoundingBoxSearch)
1290                                     $sSQL .= " AND _st_intersects($this->sViewboxSmallSQL, geometry)";
1291                                 $sSQL .= " ORDER BY st_area(geometry) DESC LIMIT 1";
1292                                 if (CONST_Debug) var_dump($sSQL);
1293                                 $aPlaceIDs = chksql($this->oDB->getCol($sSQL));
1294                             } else {
1295                                 $aPlaceIDs = array();
1296                             }
1297                         } else {
1298                             if (!$bBoundingBoxSearch && !$aSearch['oNear']) continue;
1299                             if (!$aSearch['sClass']) continue;
1300
1301                             $sSQL = "SELECT COUNT(*) FROM pg_tables WHERE tablename = 'place_classtype_".$aSearch['sClass']."_".$aSearch['sType']."'";
1302                             if (chksql($this->oDB->getOne($sSQL))) {
1303                                 $sSQL = "SELECT place_id FROM place_classtype_".$aSearch['sClass']."_".$aSearch['sType']." ct";
1304                                 if ($sCountryCodesSQL) $sSQL .= " JOIN placex USING (place_id)";
1305                                 if ($aSearch['oNear']) {
1306                                     $sSQL .= " WHERE ".$aSearch['oNear']->withinSQL('ct.centroid');
1307                                 } else {
1308                                     $sSQL .= " WHERE st_contains($this->sViewboxSmallSQL, ct.centroid)";
1309                                 }
1310                                 if ($sCountryCodesSQL) $sSQL .= " AND country_code in ($sCountryCodesSQL)";
1311                                 if (sizeof($this->aExcludePlaceIDs)) {
1312                                     $sSQL .= " AND place_id not in (".join(',', $this->aExcludePlaceIDs).")";
1313                                 }
1314                                 if ($this->sViewboxCentreSQL) {
1315                                     $sSQL .= " ORDER BY ST_Distance($this->sViewboxCentreSQL, ct.centroid) ASC";
1316                                 } elseif ($aSearch['oNear']) {
1317                                     $sSQL .= " ORDER BY ".$aSearch['oNear']->distanceSQL('ct.centroid').' ASC';
1318                                 }
1319                                 $sSQL .= " limit $this->iLimit";
1320                                 if (CONST_Debug) var_dump($sSQL);
1321                                 $aPlaceIDs = chksql($this->oDB->getCol($sSQL));
1322                             } else if ($aSearch['oNear']) {
1323                                 $sSQL = "SELECT place_id ";
1324                                 $sSQL .= "FROM placex ";
1325                                 $sSQL .= "WHERE class='".$aSearch['sClass']."' ";
1326                                 $sSQL .= "  AND type='".$aSearch['sType']."'";
1327                                 $sSQL .= "  AND ".$aSearch['oNear']->withinSQL('geometry');
1328                                 $sSQL .= "  AND linked_place_id is null";
1329                                 if ($sCountryCodesSQL) $sSQL .= " AND country_code in ($sCountryCodesSQL)";
1330                                 $sSQL .= " ORDER BY ".$aSearch['oNear']->distanceSQL('centroid')." ASC";
1331                                 $sSQL .= " LIMIT $this->iLimit";
1332                                 if (CONST_Debug) var_dump($sSQL);
1333                                 $aPlaceIDs = chksql($this->oDB->getCol($sSQL));
1334                             }
1335                         }
1336                     } elseif ($aSearch['oNear'] && !sizeof($aSearch['aName']) && !sizeof($aSearch['aAddress']) && !$aSearch['sClass']) {
1337                         // If a coordinate is given, the search must either
1338                         // be for a name or a special search. Ignore everythin else.
1339                         $aPlaceIDs = array();
1340                     } elseif ($aSearch['sOperator'] == 'postcode') {
1341                         $sSQL  = "SELECT p.place_id FROM location_postcode p ";
1342                         if (sizeof($aSearch['aAddress'])) {
1343                             $sSQL .= ", search_name s ";
1344                             $sSQL .= "WHERE s.place_id = p.parent_place_id ";
1345                             $sSQL .= "AND array_cat(s.nameaddress_vector, s.name_vector) @> ARRAY[".join($aSearch['aAddress'], ",")."] AND ";
1346                         } else {
1347                             $sSQL .= " WHERE ";
1348                         }
1349                         $sSQL .= "p.postcode = '".pg_escape_string(reset($aSearch['aName']))."'";
1350                         if ($aSearch['sCountryCode']) {
1351                             $sSQL .= " AND p.country_code = '".$aSearch['sCountryCode']."'";
1352                         } elseif ($sCountryCodesSQL) {
1353                             $sSQL .= " AND p.country_code in ($sCountryCodesSQL)";
1354                         }
1355                         $sSQL .= " LIMIT $this->iLimit";
1356                         if (CONST_Debug) var_dump($sSQL);
1357                         $aPlaceIDs = chksql($this->oDB->getCol($sSQL));
1358                     } else {
1359                         $aPlaceIDs = array();
1360
1361                         // First we need a position, either aName or fLat or both
1362                         $aTerms = array();
1363                         $aOrder = array();
1364
1365                         if ($aSearch['sHouseNumber'] && sizeof($aSearch['aAddress'])) {
1366                             $sHouseNumberRegex = '\\\\m'.$aSearch['sHouseNumber'].'\\\\M';
1367                             $aOrder[] = "";
1368                             $aOrder[0] = "  (";
1369                             $aOrder[0] .= "   EXISTS(";
1370                             $aOrder[0] .= "     SELECT place_id ";
1371                             $aOrder[0] .= "     FROM placex ";
1372                             $aOrder[0] .= "     WHERE parent_place_id = search_name.place_id";
1373                             $aOrder[0] .= "       AND transliteration(housenumber) ~* E'".$sHouseNumberRegex."' ";
1374                             $aOrder[0] .= "     LIMIT 1";
1375                             $aOrder[0] .= "   ) ";
1376                             // also housenumbers from interpolation lines table are needed
1377                             $aOrder[0] .= "   OR EXISTS(";
1378                             $aOrder[0] .= "     SELECT place_id ";
1379                             $aOrder[0] .= "     FROM location_property_osmline ";
1380                             $aOrder[0] .= "     WHERE parent_place_id = search_name.place_id";
1381                             $aOrder[0] .= "       AND startnumber is not NULL";
1382                             $aOrder[0] .= "       AND ".intval($aSearch['sHouseNumber']).">=startnumber ";
1383                             $aOrder[0] .= "       AND ".intval($aSearch['sHouseNumber'])."<=endnumber ";
1384                             $aOrder[0] .= "     LIMIT 1";
1385                             $aOrder[0] .= "   )";
1386                             $aOrder[0] .= " )";
1387                             $aOrder[0] .= " DESC";
1388                         }
1389
1390                         // TODO: filter out the pointless search terms (2 letter name tokens and less)
1391                         // they might be right - but they are just too darned expensive to run
1392                         if (sizeof($aSearch['aName'])) $aTerms[] = "name_vector @> ARRAY[".join($aSearch['aName'], ",")."]";
1393                         if (sizeof($aSearch['aNameNonSearch'])) $aTerms[] = "array_cat(name_vector,ARRAY[]::integer[]) @> ARRAY[".join($aSearch['aNameNonSearch'], ",")."]";
1394                         if (sizeof($aSearch['aAddress']) && $aSearch['aName'] != $aSearch['aAddress']) {
1395                             // For infrequent name terms disable index usage for address
1396                             if (CONST_Search_NameOnlySearchFrequencyThreshold
1397                                 && sizeof($aSearch['aName']) == 1
1398                                 && $aWordFrequencyScores[$aSearch['aName'][reset($aSearch['aName'])]] < CONST_Search_NameOnlySearchFrequencyThreshold
1399                             ) {
1400                                 $aTerms[] = "array_cat(nameaddress_vector,ARRAY[]::integer[]) @> ARRAY[".join(array_merge($aSearch['aAddress'], $aSearch['aAddressNonSearch']), ",")."]";
1401                             } else {
1402                                 $aTerms[] = "nameaddress_vector @> ARRAY[".join($aSearch['aAddress'], ",")."]";
1403                                 if (sizeof($aSearch['aAddressNonSearch'])) {
1404                                     $aTerms[] = "array_cat(nameaddress_vector,ARRAY[]::integer[]) @> ARRAY[".join($aSearch['aAddressNonSearch'], ",")."]";
1405                                 }
1406                             }
1407                         }
1408                         if ($aSearch['sCountryCode']) $aTerms[] = "country_code = '".pg_escape_string($aSearch['sCountryCode'])."'";
1409                         if ($aSearch['sHouseNumber']) {
1410                             $aTerms[] = "address_rank between 16 and 27";
1411                         } elseif (!$aSearch['sClass'] || $aSearch['sOperator'] == 'name') {
1412                             if ($this->iMinAddressRank > 0) {
1413                                 $aTerms[] = "address_rank >= ".$this->iMinAddressRank;
1414                             }
1415                             if ($this->iMaxAddressRank < 30) {
1416                                 $aTerms[] = "address_rank <= ".$this->iMaxAddressRank;
1417                             }
1418                         }
1419                         if ($aSearch['oNear']) {
1420                             $aTerms[] = $aSearch['oNear']->withinSQL('centroid');
1421
1422                             $aOrder[] = $aSearch['oNear']->distanceSQL('centroid');
1423                         } elseif ($aSearch['sPostcode']) {
1424                             if (!sizeof($aSearch['aAddress'])) {
1425                                 $aTerms[] = "EXISTS(SELECT place_id FROM location_postcode p WHERE p.postcode = '".$aSearch['sPostcode']."' AND ST_DWithin(search_name.centroid, p.geometry, 0.1))";
1426                             } else {
1427                                 $aOrder[] = "(SELECT min(ST_Distance(search_name.centroid, p.geometry)) FROM location_postcode p WHERE p.postcode = '".$aSearch['sPostcode']."')";
1428                             }
1429                         }
1430                         if (sizeof($this->aExcludePlaceIDs)) {
1431                             $aTerms[] = "place_id not in (".join(',', $this->aExcludePlaceIDs).")";
1432                         }
1433                         if ($sCountryCodesSQL) {
1434                             $aTerms[] = "country_code in ($sCountryCodesSQL)";
1435                         }
1436
1437                         if ($bBoundingBoxSearch) $aTerms[] = "centroid && $this->sViewboxSmallSQL";
1438                         if ($oNearPoint) {
1439                             $aOrder[] = $oNearPoint->distanceSQL('centroid');
1440                         }
1441
1442                         if ($aSearch['sHouseNumber']) {
1443                             $sImportanceSQL = '- abs(26 - address_rank) + 3';
1444                         } else {
1445                             $sImportanceSQL = '(CASE WHEN importance = 0 OR importance IS NULL THEN 0.75-(search_rank::float/40) ELSE importance END)';
1446                         }
1447                         if ($this->sViewboxSmallSQL) $sImportanceSQL .= " * CASE WHEN ST_Contains($this->sViewboxSmallSQL, centroid) THEN 1 ELSE 0.5 END";
1448                         if ($this->sViewboxLargeSQL) $sImportanceSQL .= " * CASE WHEN ST_Contains($this->sViewboxLargeSQL, centroid) THEN 1 ELSE 0.5 END";
1449
1450                         $aOrder[] = "$sImportanceSQL DESC";
1451                         if (sizeof($aSearch['aFullNameAddress'])) {
1452                             $sExactMatchSQL = ' ( ';
1453                             $sExactMatchSQL .= '   SELECT count(*) FROM ( ';
1454                             $sExactMatchSQL .= '      SELECT unnest(ARRAY['.join($aSearch['aFullNameAddress'], ",").']) ';
1455                             $sExactMatchSQL .= '      INTERSECT ';
1456                             $sExactMatchSQL .= '      SELECT unnest(nameaddress_vector)';
1457                             $sExactMatchSQL .= '   ) s';
1458                             $sExactMatchSQL .= ') as exactmatch';
1459                             $aOrder[] = 'exactmatch DESC';
1460                         } else {
1461                             $sExactMatchSQL = '0::int as exactmatch';
1462                         }
1463
1464                         if (sizeof($aTerms)) {
1465                             $sSQL = "SELECT place_id, ";
1466                             $sSQL .= $sExactMatchSQL;
1467                             $sSQL .= " FROM search_name";
1468                             $sSQL .= " WHERE ".join(' and ', $aTerms);
1469                             $sSQL .= " ORDER BY ".join(', ', $aOrder);
1470                             if ($aSearch['sHouseNumber'] || $aSearch['sClass']) {
1471                                 $sSQL .= " LIMIT 20";
1472                             } elseif (!sizeof($aSearch['aName']) && !sizeof($aSearch['aAddress']) && $aSearch['sClass']) {
1473                                 $sSQL .= " LIMIT 1";
1474                             } else {
1475                                 $sSQL .= " LIMIT ".$this->iLimit;
1476                             }
1477
1478                             if (CONST_Debug) var_dump($sSQL);
1479                             $aViewBoxPlaceIDs = chksql(
1480                                 $this->oDB->getAll($sSQL),
1481                                 "Could not get places for search terms."
1482                             );
1483                             //var_dump($aViewBoxPlaceIDs);
1484                             // Did we have an viewbox matches?
1485                             $aPlaceIDs = array();
1486                             $bViewBoxMatch = false;
1487                             foreach ($aViewBoxPlaceIDs as $aViewBoxRow) {
1488                                 //if ($bViewBoxMatch == 1 && $aViewBoxRow['in_small'] == 'f') break;
1489                                 //if ($bViewBoxMatch == 2 && $aViewBoxRow['in_large'] == 'f') break;
1490                                 //if ($aViewBoxRow['in_small'] == 't') $bViewBoxMatch = 1;
1491                                 //else if ($aViewBoxRow['in_large'] == 't') $bViewBoxMatch = 2;
1492                                 $aPlaceIDs[] = $aViewBoxRow['place_id'];
1493                                 $this->exactMatchCache[$aViewBoxRow['place_id']] = $aViewBoxRow['exactmatch'];
1494                             }
1495                         }
1496                         //var_Dump($aPlaceIDs);
1497                         //exit;
1498
1499                         //now search for housenumber, if housenumber provided
1500                         if ($aSearch['sHouseNumber'] && sizeof($aPlaceIDs)) {
1501                             $searchedHousenumber = intval($aSearch['sHouseNumber']);
1502                             $aRoadPlaceIDs = $aPlaceIDs;
1503                             $sPlaceIDs = join(',', $aPlaceIDs);
1504
1505                             // Now they are indexed, look for a house attached to a street we found
1506                             $sHouseNumberRegex = '\\\\m'.$aSearch['sHouseNumber'].'\\\\M';
1507                             $sSQL = "SELECT place_id FROM placex ";
1508                             $sSQL .= "WHERE parent_place_id in (".$sPlaceIDs.") and transliteration(housenumber) ~* E'".$sHouseNumberRegex."'";
1509                             if (sizeof($this->aExcludePlaceIDs)) {
1510                                 $sSQL .= " AND place_id not in (".join(',', $this->aExcludePlaceIDs).")";
1511                             }
1512                             $sSQL .= " LIMIT $this->iLimit";
1513                             if (CONST_Debug) var_dump($sSQL);
1514                             $aPlaceIDs = chksql($this->oDB->getCol($sSQL));
1515
1516                             // if nothing found, search in the interpolation line table
1517                             if (!sizeof($aPlaceIDs)) {
1518                                 // do we need to use transliteration and the regex for housenumbers???
1519                                 //new query for lines, not housenumbers anymore
1520                                 $sSQL = "SELECT distinct place_id FROM location_property_osmline";
1521                                 $sSQL .= " WHERE startnumber is not NULL and parent_place_id in (".$sPlaceIDs.") and (";
1522                                 if ($searchedHousenumber%2 == 0) {
1523                                     //if housenumber is even, look for housenumber in streets with interpolationtype even or all
1524                                     $sSQL .= "interpolationtype='even'";
1525                                 } else {
1526                                     //look for housenumber in streets with interpolationtype odd or all
1527                                     $sSQL .= "interpolationtype='odd'";
1528                                 }
1529                                 $sSQL .= " or interpolationtype='all') and ";
1530                                 $sSQL .= $searchedHousenumber.">=startnumber and ";
1531                                 $sSQL .= $searchedHousenumber."<=endnumber";
1532
1533                                 if (sizeof($this->aExcludePlaceIDs)) {
1534                                     $sSQL .= " AND place_id not in (".join(',', $this->aExcludePlaceIDs).")";
1535                                 }
1536                                 //$sSQL .= " limit $this->iLimit";
1537                                 if (CONST_Debug) var_dump($sSQL);
1538                                 //get place IDs
1539                                 $aPlaceIDs = chksql($this->oDB->getCol($sSQL, 0));
1540                             }
1541
1542                             // If nothing found try the aux fallback table
1543                             if (CONST_Use_Aux_Location_data && !sizeof($aPlaceIDs)) {
1544                                 $sSQL = "SELECT place_id FROM location_property_aux ";
1545                                 $sSQL .= " WHERE parent_place_id in (".$sPlaceIDs.") ";
1546                                 $sSQL .= " AND housenumber = '".pg_escape_string($aSearch['sHouseNumber'])."'";
1547                                 if (sizeof($this->aExcludePlaceIDs)) {
1548                                     $sSQL .= " AND parent_place_id not in (".join(',', $this->aExcludePlaceIDs).")";
1549                                 }
1550                                 //$sSQL .= " limit $this->iLimit";
1551                                 if (CONST_Debug) var_dump($sSQL);
1552                                 $aPlaceIDs = chksql($this->oDB->getCol($sSQL));
1553                             }
1554
1555                             //if nothing was found in placex or location_property_aux, then search in Tiger data for this housenumber(location_property_tiger)
1556                             if (CONST_Use_US_Tiger_Data && !sizeof($aPlaceIDs)) {
1557                                 $sSQL = "SELECT distinct place_id FROM location_property_tiger";
1558                                 $sSQL .= " WHERE parent_place_id in (".$sPlaceIDs.") and (";
1559                                 if ($searchedHousenumber%2 == 0) {
1560                                     $sSQL .= "interpolationtype='even'";
1561                                 } else {
1562                                     $sSQL .= "interpolationtype='odd'";
1563                                 }
1564                                 $sSQL .= " or interpolationtype='all') and ";
1565                                 $sSQL .= $searchedHousenumber.">=startnumber and ";
1566                                 $sSQL .= $searchedHousenumber."<=endnumber";
1567
1568                                 if (sizeof($this->aExcludePlaceIDs)) {
1569                                     $sSQL .= " AND place_id not in (".join(',', $this->aExcludePlaceIDs).")";
1570                                 }
1571                                 //$sSQL .= " limit $this->iLimit";
1572                                 if (CONST_Debug) var_dump($sSQL);
1573                                 //get place IDs
1574                                 $aPlaceIDs = chksql($this->oDB->getCol($sSQL, 0));
1575                             }
1576
1577                             // Fallback to the road (if no housenumber was found)
1578                             if (!sizeof($aPlaceIDs) && preg_match('/[0-9]+/', $aSearch['sHouseNumber'])
1579                                 && ($aSearch['aAddress'] || $aSearch['sCountryCode'])) {
1580                                 $aPlaceIDs = $aRoadPlaceIDs;
1581                                 //set to -1, if no housenumbers were found
1582                                 $searchedHousenumber = -1;
1583                             }
1584                             //else: housenumber was found, remains saved in searchedHousenumber
1585                         }
1586
1587
1588                         if ($aSearch['sClass'] && sizeof($aPlaceIDs)) {
1589                             $sPlaceIDs = join(',', $aPlaceIDs);
1590                             $aClassPlaceIDs = array();
1591
1592                             if (!$aSearch['sOperator'] || $aSearch['sOperator'] == 'name') {
1593                                 // If they were searching for a named class (i.e. 'Kings Head pub') then we might have an extra match
1594                                 $sSQL = "SELECT place_id ";
1595                                 $sSQL .= " FROM placex ";
1596                                 $sSQL .= " WHERE place_id in ($sPlaceIDs) ";
1597                                 $sSQL .= "   AND class='".$aSearch['sClass']."' ";
1598                                 $sSQL .= "   AND type='".$aSearch['sType']."'";
1599                                 $sSQL .= "   AND linked_place_id is null";
1600                                 if ($sCountryCodesSQL) $sSQL .= " AND country_code in ($sCountryCodesSQL)";
1601                                 $sSQL .= " ORDER BY rank_search ASC ";
1602                                 $sSQL .= " LIMIT $this->iLimit";
1603                                 if (CONST_Debug) var_dump($sSQL);
1604                                 $aClassPlaceIDs = chksql($this->oDB->getCol($sSQL));
1605                             }
1606
1607                             if (!$aSearch['sOperator'] || $aSearch['sOperator'] == 'near') { // & in
1608                                 $sClassTable = 'place_classtype_'.$aSearch['sClass'].'_'.$aSearch['sType'];
1609                                 $sSQL = "SELECT count(*) FROM pg_tables ";
1610                                 $sSQL .= "WHERE tablename = '$sClassTable'";
1611                                 $bCacheTable = chksql($this->oDB->getOne($sSQL));
1612
1613                                 $sSQL = "SELECT min(rank_search) FROM placex WHERE place_id in ($sPlaceIDs)";
1614
1615                                 if (CONST_Debug) var_dump($sSQL);
1616                                 $this->iMaxRank = ((int)chksql($this->oDB->getOne($sSQL)));
1617
1618                                 // For state / country level searches the normal radius search doesn't work very well
1619                                 $sPlaceGeom = false;
1620                                 if ($this->iMaxRank < 9 && $bCacheTable) {
1621                                     // Try and get a polygon to search in instead
1622                                     $sSQL = "SELECT geometry ";
1623                                     $sSQL .= " FROM placex";
1624                                     $sSQL .= " WHERE place_id in ($sPlaceIDs)";
1625                                     $sSQL .= "   AND rank_search < $this->iMaxRank + 5";
1626                                     $sSQL .= "   AND ST_Geometrytype(geometry) in ('ST_Polygon','ST_MultiPolygon')";
1627                                     $sSQL .= " ORDER BY rank_search ASC ";
1628                                     $sSQL .= " LIMIT 1";
1629                                     if (CONST_Debug) var_dump($sSQL);
1630                                     $sPlaceGeom = chksql($this->oDB->getOne($sSQL));
1631                                 }
1632
1633                                 if ($sPlaceGeom) {
1634                                     $sPlaceIDs = false;
1635                                 } else {
1636                                     $this->iMaxRank += 5;
1637                                     $sSQL = "SELECT place_id FROM placex WHERE place_id in ($sPlaceIDs) and rank_search < $this->iMaxRank";
1638                                     if (CONST_Debug) var_dump($sSQL);
1639                                     $aPlaceIDs = chksql($this->oDB->getCol($sSQL));
1640                                     $sPlaceIDs = join(',', $aPlaceIDs);
1641                                 }
1642
1643                                 if ($sPlaceIDs || $sPlaceGeom) {
1644                                     $fRange = 0.01;
1645                                     if ($bCacheTable) {
1646                                         // More efficient - can make the range bigger
1647                                         $fRange = 0.05;
1648
1649                                         $sOrderBySQL = '';
1650                                         if ($oNearPoint) {
1651                                             $sOrderBySQL = $oNearPoint->distanceSQL('l.centroid');
1652                                         } elseif ($sPlaceIDs) {
1653                                             $sOrderBySQL = "ST_Distance(l.centroid, f.geometry)";
1654                                         } elseif ($sPlaceGeom) {
1655                                             $sOrderBySQL = "ST_Distance(st_centroid('".$sPlaceGeom."'), l.centroid)";
1656                                         }
1657
1658                                         $sSQL = "select distinct i.place_id".($sOrderBySQL?', i.order_term':'')." from (";
1659                                         $sSQL .= "select l.place_id".($sOrderBySQL?','.$sOrderBySQL.' as order_term':'')." from ".$sClassTable." as l";
1660                                         if ($sCountryCodesSQL) $sSQL .= " join placex as lp using (place_id)";
1661                                         if ($sPlaceIDs) {
1662                                             $sSQL .= ",placex as f where ";
1663                                             $sSQL .= "f.place_id in ($sPlaceIDs) and ST_DWithin(l.centroid, f.centroid, $fRange) ";
1664                                         }
1665                                         if ($sPlaceGeom) {
1666                                             $sSQL .= " where ";
1667                                             $sSQL .= "ST_Contains('".$sPlaceGeom."', l.centroid) ";
1668                                         }
1669                                         if (sizeof($this->aExcludePlaceIDs)) {
1670                                             $sSQL .= " and l.place_id not in (".join(',', $this->aExcludePlaceIDs).")";
1671                                         }
1672                                         if ($sCountryCodesSQL) $sSQL .= " and lp.country_code in ($sCountryCodesSQL)";
1673                                         $sSQL .= 'limit 300) i ';
1674                                         if ($sOrderBySQL) $sSQL .= "order by order_term asc";
1675                                         if ($this->iOffset) $sSQL .= " offset $this->iOffset";
1676                                         $sSQL .= " limit $this->iLimit";
1677                                         if (CONST_Debug) var_dump($sSQL);
1678                                         $aClassPlaceIDs = array_merge($aClassPlaceIDs, chksql($this->oDB->getCol($sSQL)));
1679                                     } else {
1680                                         if ($aSearch['oNear']) {
1681                                             $fRange = $aSearch['oNear']->radius();
1682                                         }
1683
1684                                         $sOrderBySQL = '';
1685                                         if ($oNearPoint) {
1686                                             $sOrderBySQL = $oNearPoint->distanceSQL('l.geometry');
1687                                         } else {
1688                                             $sOrderBySQL = "ST_Distance(l.geometry, f.geometry)";
1689                                         }
1690
1691                                         $sSQL = "SELECT distinct l.place_id".($sOrderBySQL?','.$sOrderBySQL:'');
1692                                         $sSQL .= " FROM placex as l, placex as f ";
1693                                         $sSQL .= " WHERE f.place_id in ($sPlaceIDs) ";
1694                                         $sSQL .= "  AND ST_DWithin(l.geometry, f.centroid, $fRange) ";
1695                                         $sSQL .= "  AND l.class='".$aSearch['sClass']."' ";
1696                                         $sSQL .= "  AND l.type='".$aSearch['sType']."' ";
1697                                         if (sizeof($this->aExcludePlaceIDs)) {
1698                                             $sSQL .= " AND l.place_id not in (".join(',', $this->aExcludePlaceIDs).")";
1699                                         }
1700                                         if ($sCountryCodesSQL) $sSQL .= " AND l.country_code in ($sCountryCodesSQL)";
1701                                         if ($sOrderBySQL) $sSQL .= "ORDER BY ".$sOrderBySQL." ASC";
1702                                         if ($this->iOffset) $sSQL .= " OFFSET $this->iOffset";
1703                                         $sSQL .= " limit $this->iLimit";
1704                                         if (CONST_Debug) var_dump($sSQL);
1705                                         $aClassPlaceIDs = array_merge($aClassPlaceIDs, chksql($this->oDB->getCol($sSQL)));
1706                                     }
1707                                 }
1708                             }
1709                             $aPlaceIDs = $aClassPlaceIDs;
1710                         }
1711                     }
1712
1713                     if (CONST_Debug) {
1714                         echo "<br><b>Place IDs:</b> ";
1715                         var_Dump($aPlaceIDs);
1716                     }
1717
1718                     if (sizeof($aPlaceIDs) && $aSearch['sPostcode']) {
1719                         $sSQL = 'SELECT place_id FROM placex';
1720                         $sSQL .= ' WHERE place_id in ('.join(',', $aPlaceIDs).')';
1721                         $sSQL .= " AND postcode = '".pg_escape_string($aSearch['sPostcode'])."'";
1722                         if (CONST_Debug) var_dump($sSQL);
1723                         $aFilteredPlaceIDs = chksql($this->oDB->getCol($sSQL));
1724                         if ($aFilteredPlaceIDs) {
1725                             $aPlaceIDs = $aFilteredPlaceIDs;
1726                             if (CONST_Debug) {
1727                                 echo "<br><b>Place IDs after postcode filtering:</b> ";
1728                                 var_Dump($aPlaceIDs);
1729                             }
1730                         }
1731                     }
1732
1733                     foreach ($aPlaceIDs as $iPlaceID) {
1734                         // array for placeID => -1 | Tiger housenumber
1735                         $aResultPlaceIDs[$iPlaceID] = $searchedHousenumber;
1736                     }
1737                     if ($iQueryLoop > 20) break;
1738                 }
1739
1740                 if (isset($aResultPlaceIDs) && sizeof($aResultPlaceIDs) && ($this->iMinAddressRank != 0 || $this->iMaxAddressRank != 30)) {
1741                     // Need to verify passes rank limits before dropping out of the loop (yuk!)
1742                     // reduces the number of place ids, like a filter
1743                     // rank_address is 30 for interpolated housenumbers
1744                     $sWherePlaceId = 'WHERE place_id in (';
1745                     $sWherePlaceId .= join(',', array_keys($aResultPlaceIDs)).') ';
1746
1747                     $sSQL = "SELECT place_id ";
1748                     $sSQL .= "FROM placex ".$sWherePlaceId;
1749                     $sSQL .= "  AND (";
1750                     $sSQL .= "         placex.rank_address between $this->iMinAddressRank and $this->iMaxAddressRank ";
1751                     if (14 >= $this->iMinAddressRank && 14 <= $this->iMaxAddressRank) {
1752                         $sSQL .= "     OR (extratags->'place') = 'city'";
1753                     }
1754                     if ($this->aAddressRankList) {
1755                         $sSQL .= "     OR placex.rank_address in (".join(',', $this->aAddressRankList).")";
1756                     }
1757                     $sSQL .= "  ) UNION ";
1758                     $sSQL .= " SELECT place_id FROM location_postcode lp ".$sWherePlaceId;
1759                     $sSQL .= "  AND (lp.rank_address between $this->iMinAddressRank and $this->iMaxAddressRank ";
1760                     if ($this->aAddressRankList) {
1761                         $sSQL .= "     OR lp.rank_address in (".join(',', $this->aAddressRankList).")";
1762                     }
1763                     $sSQL .= ") ";
1764                     if (CONST_Use_US_Tiger_Data && $this->iMaxAddressRank == 30) {
1765                         $sSQL .= "UNION ";
1766                         $sSQL .= "  SELECT place_id ";
1767                         $sSQL .= "  FROM location_property_tiger ".$sWherePlaceId;
1768                     }
1769                     if ($this->iMaxAddressRank == 30) {
1770                         $sSQL .= "UNION ";
1771                         $sSQL .= "  SELECT place_id ";
1772                         $sSQL .= "  FROM location_property_osmline ".$sWherePlaceId;
1773                     }
1774                     if (CONST_Debug) var_dump($sSQL);
1775                     $aFilteredPlaceIDs = chksql($this->oDB->getCol($sSQL));
1776                     $tempIDs = array();
1777                     foreach ($aFilteredPlaceIDs as $placeID) {
1778                         $tempIDs[$placeID] = $aResultPlaceIDs[$placeID];  //assign housenumber to placeID
1779                     }
1780                     $aResultPlaceIDs = $tempIDs;
1781                 }
1782
1783                 //exit;
1784                 if (isset($aResultPlaceIDs) && sizeof($aResultPlaceIDs)) break;
1785                 if ($iGroupLoop > 4) break;
1786                 if ($iQueryLoop > 30) break;
1787             }
1788
1789             // Did we find anything?
1790             if (isset($aResultPlaceIDs) && sizeof($aResultPlaceIDs)) {
1791                 $aSearchResults = $this->getDetails($aResultPlaceIDs);
1792             }
1793         } else {
1794             // Just interpret as a reverse geocode
1795             $oReverse = new ReverseGeocode($this->oDB);
1796             $oReverse->setZoom(18);
1797
1798             $aLookup = $oReverse->lookup(
1799                 $oNearPoint->lat(),
1800                 $oNearPoint->lon(),
1801                 false
1802             );
1803
1804             if (CONST_Debug) var_dump("Reverse search", $aLookup);
1805
1806             if ($aLookup['place_id']) {
1807                 $aSearchResults = $this->getDetails(array($aLookup['place_id'] => -1));
1808                 $aResultPlaceIDs[$aLookup['place_id']] = -1;
1809             } else {
1810                 $aSearchResults = array();
1811             }
1812         }
1813
1814         // No results? Done
1815         if (!sizeof($aSearchResults)) {
1816             if ($this->bFallback) {
1817                 if ($this->fallbackStructuredQuery()) {
1818                     return $this->lookup();
1819                 }
1820             }
1821
1822             return array();
1823         }
1824
1825         $aClassType = getClassTypesWithImportance();
1826         $aRecheckWords = preg_split('/\b[\s,\\-]*/u', $sQuery);
1827         foreach ($aRecheckWords as $i => $sWord) {
1828             if (!preg_match('/[\pL\pN]/', $sWord)) unset($aRecheckWords[$i]);
1829         }
1830
1831         if (CONST_Debug) {
1832             echo '<i>Recheck words:<\i>';
1833             var_dump($aRecheckWords);
1834         }
1835
1836         $oPlaceLookup = new PlaceLookup($this->oDB);
1837         $oPlaceLookup->setIncludePolygonAsPoints($this->bIncludePolygonAsPoints);
1838         $oPlaceLookup->setIncludePolygonAsText($this->bIncludePolygonAsText);
1839         $oPlaceLookup->setIncludePolygonAsGeoJSON($this->bIncludePolygonAsGeoJSON);
1840         $oPlaceLookup->setIncludePolygonAsKML($this->bIncludePolygonAsKML);
1841         $oPlaceLookup->setIncludePolygonAsSVG($this->bIncludePolygonAsSVG);
1842         $oPlaceLookup->setPolygonSimplificationThreshold($this->fPolygonSimplificationThreshold);
1843
1844         foreach ($aSearchResults as $iResNum => $aResult) {
1845             // Default
1846             $fDiameter = getResultDiameter($aResult);
1847
1848             $aOutlineResult = $oPlaceLookup->getOutlines($aResult['place_id'], $aResult['lon'], $aResult['lat'], $fDiameter/2);
1849             if ($aOutlineResult) {
1850                 $aResult = array_merge($aResult, $aOutlineResult);
1851             }
1852
1853             if ($aResult['extra_place'] == 'city') {
1854                 $aResult['class'] = 'place';
1855                 $aResult['type'] = 'city';
1856                 $aResult['rank_search'] = 16;
1857             }
1858
1859             // Is there an icon set for this type of result?
1860             if (isset($aClassType[$aResult['class'].':'.$aResult['type']]['icon'])
1861                 && $aClassType[$aResult['class'].':'.$aResult['type']]['icon']
1862             ) {
1863                 $aResult['icon'] = CONST_Website_BaseURL.'images/mapicons/'.$aClassType[$aResult['class'].':'.$aResult['type']]['icon'].'.p.20.png';
1864             }
1865
1866             if (isset($aClassType[$aResult['class'].':'.$aResult['type'].':'.$aResult['admin_level']]['label'])
1867                 && $aClassType[$aResult['class'].':'.$aResult['type'].':'.$aResult['admin_level']]['label']
1868             ) {
1869                 $aResult['label'] = $aClassType[$aResult['class'].':'.$aResult['type'].':'.$aResult['admin_level']]['label'];
1870             } elseif (isset($aClassType[$aResult['class'].':'.$aResult['type']]['label'])
1871                 && $aClassType[$aResult['class'].':'.$aResult['type']]['label']
1872             ) {
1873                 $aResult['label'] = $aClassType[$aResult['class'].':'.$aResult['type']]['label'];
1874             }
1875             // if tag '&addressdetails=1' is set in query
1876             if ($this->bIncludeAddressDetails) {
1877                 // getAddressDetails() is defined in lib.php and uses the SQL function get_addressdata in functions.sql
1878                 $aResult['address'] = getAddressDetails($this->oDB, $sLanguagePrefArraySQL, $aResult['place_id'], $aResult['country_code'], $aResultPlaceIDs[$aResult['place_id']]);
1879                 if ($aResult['extra_place'] == 'city' && !isset($aResult['address']['city'])) {
1880                     $aResult['address'] = array_merge(array('city' => array_values($aResult['address'])[0]), $aResult['address']);
1881                 }
1882             }
1883
1884             if ($this->bIncludeExtraTags) {
1885                 if ($aResult['extra']) {
1886                     $aResult['sExtraTags'] = json_decode($aResult['extra']);
1887                 } else {
1888                     $aResult['sExtraTags'] = (object) array();
1889                 }
1890             }
1891
1892             if ($this->bIncludeNameDetails) {
1893                 if ($aResult['names']) {
1894                     $aResult['sNameDetails'] = json_decode($aResult['names']);
1895                 } else {
1896                     $aResult['sNameDetails'] = (object) array();
1897                 }
1898             }
1899
1900             // Adjust importance for the number of exact string matches in the result
1901             $aResult['importance'] = max(0.001, $aResult['importance']);
1902             $iCountWords = 0;
1903             $sAddress = $aResult['langaddress'];
1904             foreach ($aRecheckWords as $i => $sWord) {
1905                 if (stripos($sAddress, $sWord)!==false) {
1906                     $iCountWords++;
1907                     if (preg_match("/(^|,)\s*".preg_quote($sWord, '/')."\s*(,|$)/", $sAddress)) $iCountWords += 0.1;
1908                 }
1909             }
1910
1911             $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
1912
1913             $aResult['name'] = $aResult['langaddress'];
1914             // secondary ordering (for results with same importance (the smaller the better):
1915             // - approximate importance of address parts
1916             $aResult['foundorder'] = -$aResult['addressimportance']/10;
1917             // - number of exact matches from the query
1918             if (isset($this->exactMatchCache[$aResult['place_id']])) {
1919                 $aResult['foundorder'] -= $this->exactMatchCache[$aResult['place_id']];
1920             } elseif (isset($this->exactMatchCache[$aResult['parent_place_id']])) {
1921                 $aResult['foundorder'] -= $this->exactMatchCache[$aResult['parent_place_id']];
1922             }
1923             // - importance of the class/type
1924             if (isset($aClassType[$aResult['class'].':'.$aResult['type']]['importance'])
1925                 && $aClassType[$aResult['class'].':'.$aResult['type']]['importance']
1926             ) {
1927                 $aResult['foundorder'] += 0.0001 * $aClassType[$aResult['class'].':'.$aResult['type']]['importance'];
1928             } else {
1929                 $aResult['foundorder'] += 0.01;
1930             }
1931             if (CONST_Debug) var_dump($aResult);
1932             $aSearchResults[$iResNum] = $aResult;
1933         }
1934         uasort($aSearchResults, 'byImportance');
1935
1936         $aOSMIDDone = array();
1937         $aClassTypeNameDone = array();
1938         $aToFilter = $aSearchResults;
1939         $aSearchResults = array();
1940
1941         $bFirst = true;
1942         foreach ($aToFilter as $iResNum => $aResult) {
1943             $this->aExcludePlaceIDs[$aResult['place_id']] = $aResult['place_id'];
1944             if ($bFirst) {
1945                 $fLat = $aResult['lat'];
1946                 $fLon = $aResult['lon'];
1947                 if (isset($aResult['zoom'])) $iZoom = $aResult['zoom'];
1948                 $bFirst = false;
1949             }
1950             if (!$this->bDeDupe || (!isset($aOSMIDDone[$aResult['osm_type'].$aResult['osm_id']])
1951                 && !isset($aClassTypeNameDone[$aResult['osm_type'].$aResult['class'].$aResult['type'].$aResult['name'].$aResult['admin_level']]))
1952             ) {
1953                 $aOSMIDDone[$aResult['osm_type'].$aResult['osm_id']] = true;
1954                 $aClassTypeNameDone[$aResult['osm_type'].$aResult['class'].$aResult['type'].$aResult['name'].$aResult['admin_level']] = true;
1955                 $aSearchResults[] = $aResult;
1956             }
1957
1958             // Absolute limit on number of results
1959             if (sizeof($aSearchResults) >= $this->iFinalLimit) break;
1960         }
1961
1962         return $aSearchResults;
1963     } // end lookup()
1964 } // end class