lib/Geocode.php

   1 <?php
   2
   3 namespace Nominatim;
   4
   5 require_once(CONST_BasePath.'/lib/PlaceLookup.php');
   6 require_once(CONST_BasePath.'/lib/Phrase.php');
   7 require_once(CONST_BasePath.'/lib/ReverseGeocode.php');
   8 require_once(CONST_BasePath.'/lib/SearchDescription.php');
   9 require_once(CONST_BasePath.'/lib/SearchContext.php');
  10 require_once(CONST_BasePath.'/lib/TokenList.php');
  11
  12 class Geocode
  13 {
  14     protected $oDB;
  15
  16     protected $oPlaceLookup;
  17
  18     protected $aLangPrefOrder = array();
  19
  20     protected $aExcludePlaceIDs = array();
  21     protected $bReverseInPlan = false;
  22
  23     protected $iLimit = 20;
  24     protected $iFinalLimit = 10;
  25     protected $iOffset = 0;
  26     protected $bFallback = false;
  27
  28     protected $aCountryCodes = false;
  29
  30     protected $bBoundedSearch = false;
  31     protected $aViewBox = false;
  32     protected $aRoutePoints = false;
  33     protected $aRouteWidth = false;
  34
  35     protected $iMaxRank = 20;
  36     protected $iMinAddressRank = 0;
  37     protected $iMaxAddressRank = 30;
  38     protected $aAddressRankList = array();
  39
  40     protected $sAllowedTypesSQLList = false;
  41
  42     protected $sQuery = false;
  43     protected $aStructuredQuery = false;
  44
  45     protected $oNormalizer = null;
  46
  47
  48     public function __construct(&$oDB)
  49     {
  50         $this->oDB =& $oDB;
  51         $this->oPlaceLookup = new PlaceLookup($this->oDB);
  52         $this->oNormalizer = \Transliterator::createFromRules(CONST_Term_Normalization_Rules);
  53     }
  54
  55     private function normTerm($sTerm)
  56     {
  57         if ($this->oNormalizer === null) {
  58             return $sTerm;
  59         }
  60
  61         return $this->oNormalizer->transliterate($sTerm);
  62     }
  63
  64     public function setReverseInPlan($bReverse)
  65     {
  66         $this->bReverseInPlan = $bReverse;
  67     }
  68
  69     public function setLanguagePreference($aLangPref)
  70     {
  71         $this->aLangPrefOrder = $aLangPref;
  72     }
  73
  74     public function getMoreUrlParams()
  75     {
  76         if ($this->aStructuredQuery) {
  77             $aParams = $this->aStructuredQuery;
  78         } else {
  79             $aParams = array('q' => $this->sQuery);
  80         }
  81
  82         $aParams = array_merge($aParams, $this->oPlaceLookup->getMoreUrlParams());
  83
  84         if ($this->aExcludePlaceIDs) {
  85             $aParams['exclude_place_ids'] = implode(',', $this->aExcludePlaceIDs);
  86         }
  87
  88         if ($this->bBoundedSearch) $aParams['bounded'] = '1';
  89
  90         if ($this->aCountryCodes) {
  91             $aParams['countrycodes'] = implode(',', $this->aCountryCodes);
  92         }
  93
  94         if ($this->aViewBox) {
  95             $aParams['viewbox'] = join(',', $this->aViewBox);
  96         }
  97
  98         return $aParams;
  99     }
 100
 101     public function setLimit($iLimit = 10)
 102     {
 103         if ($iLimit > 50) $iLimit = 50;
 104         if ($iLimit < 1) $iLimit = 1;
 105
 106         $this->iFinalLimit = $iLimit;
 107         $this->iLimit = $iLimit + min($iLimit, 10);
 108     }
 109
 110     public function setFeatureType($sFeatureType)
 111     {
 112         switch ($sFeatureType) {
 113             case 'country':
 114                 $this->setRankRange(4, 4);
 115                 break;
 116             case 'state':
 117                 $this->setRankRange(8, 8);
 118                 break;
 119             case 'city':
 120                 $this->setRankRange(14, 16);
 121                 break;
 122             case 'settlement':
 123                 $this->setRankRange(8, 20);
 124                 break;
 125         }
 126     }
 127
 128     public function setRankRange($iMin, $iMax)
 129     {
 130         $this->iMinAddressRank = $iMin;
 131         $this->iMaxAddressRank = $iMax;
 132     }
 133
 134     public function setViewbox($aViewbox)
 135     {
 136         $aBox = array_map('floatval', $aViewbox);
 137
 138         $this->aViewBox[0] = max(-180.0, min($aBox[0], $aBox[2]));
 139         $this->aViewBox[1] = max(-90.0, min($aBox[1], $aBox[3]));
 140         $this->aViewBox[2] = min(180.0, max($aBox[0], $aBox[2]));
 141         $this->aViewBox[3] = min(90.0, max($aBox[1], $aBox[3]));
 142
 143         if ($this->aViewBox[2] - $this->aViewBox[0] < 0.000000001
 144             || $this->aViewBox[3] - $this->aViewBox[1] < 0.000000001
 145         ) {
 146             userError("Bad parameter 'viewbox'. Not a box.");
 147         }
 148     }
 149
 150     private function viewboxImportanceFactor($fX, $fY)
 151     {
 152         if (!$this->aViewBox) {
 153             return 1;
 154         }
 155
 156         $fWidth = ($this->aViewBox[2] - $this->aViewBox[0])/2;
 157         $fHeight = ($this->aViewBox[3] - $this->aViewBox[1])/2;
 158
 159         $fXDist = abs($fX - ($this->aViewBox[0] + $this->aViewBox[2])/2);
 160         $fYDist = abs($fY - ($this->aViewBox[1] + $this->aViewBox[3])/2);
 161
 162         if ($fXDist <= $fWidth && $fYDist <= $fHeight) {
 163             return 1;
 164         }
 165
 166         if ($fXDist <= $fWidth * 3 && $fYDist <= 3 * $fHeight) {
 167             return 0.5;
 168         }
 169
 170         return 0.25;
 171     }
 172
 173     public function setQuery($sQueryString)
 174     {
 175         $this->sQuery = $sQueryString;
 176         $this->aStructuredQuery = false;
 177     }
 178
 179     public function getQueryString()
 180     {
 181         return $this->sQuery;
 182     }
 183
 184
 185     public function loadParamArray($oParams, $sForceGeometryType = null)
 186     {
 187         $this->bBoundedSearch = $oParams->getBool('bounded', $this->bBoundedSearch);
 188
 189         $this->setLimit($oParams->getInt('limit', $this->iFinalLimit));
 190         $this->iOffset = $oParams->getInt('offset', $this->iOffset);
 191
 192         $this->bFallback = $oParams->getBool('fallback', $this->bFallback);
 193
 194         // List of excluded Place IDs - used for more acurate pageing
 195         $sExcluded = $oParams->getStringList('exclude_place_ids');
 196         if ($sExcluded) {
 197             foreach ($sExcluded as $iExcludedPlaceID) {
 198                 $iExcludedPlaceID = (int)$iExcludedPlaceID;
 199                 if ($iExcludedPlaceID)
 200                     $aExcludePlaceIDs[$iExcludedPlaceID] = $iExcludedPlaceID;
 201             }
 202
 203             if (isset($aExcludePlaceIDs))
 204                 $this->aExcludePlaceIDs = $aExcludePlaceIDs;
 205         }
 206
 207         // Only certain ranks of feature
 208         $sFeatureType = $oParams->getString('featureType');
 209         if (!$sFeatureType) $sFeatureType = $oParams->getString('featuretype');
 210         if ($sFeatureType) $this->setFeatureType($sFeatureType);
 211
 212         // Country code list
 213         $sCountries = $oParams->getStringList('countrycodes');
 214         if ($sCountries) {
 215             foreach ($sCountries as $sCountryCode) {
 216                 if (preg_match('/^[a-zA-Z][a-zA-Z]$/', $sCountryCode)) {
 217                     $aCountries[] = strtolower($sCountryCode);
 218                 }
 219             }
 220             if (isset($aCountries))
 221                 $this->aCountryCodes = $aCountries;
 222         }
 223
 224         $aViewbox = $oParams->getStringList('viewboxlbrt');
 225         if ($aViewbox) {
 226             if (count($aViewbox) != 4) {
 227                 userError("Bad parameter 'viewboxlbrt'. Expected 4 coordinates.");
 228             }
 229             $this->setViewbox($aViewbox);
 230         } else {
 231             $aViewbox = $oParams->getStringList('viewbox');
 232             if ($aViewbox) {
 233                 if (count($aViewbox) != 4) {
 234                     userError("Bad parameter 'viewbox'. Expected 4 coordinates.");
 235                 }
 236                 $this->setViewBox($aViewbox);
 237             } else {
 238                 $aRoute = $oParams->getStringList('route');
 239                 $fRouteWidth = $oParams->getFloat('routewidth');
 240                 if ($aRoute && $fRouteWidth) {
 241                     $this->aRoutePoints = $aRoute;
 242                     $this->aRouteWidth = $fRouteWidth;
 243                 }
 244             }
 245         }
 246
 247         $this->oPlaceLookup->loadParamArray($oParams, $sForceGeometryType);
 248         $this->oPlaceLookup->setIncludeAddressDetails($oParams->getBool('addressdetails', false));
 249     }
 250
 251     public function setQueryFromParams($oParams)
 252     {
 253         // Search query
 254         $sQuery = $oParams->getString('q');
 255         if (!$sQuery) {
 256             $this->setStructuredQuery(
 257                 $oParams->getString('amenity'),
 258                 $oParams->getString('street'),
 259                 $oParams->getString('city'),
 260                 $oParams->getString('county'),
 261                 $oParams->getString('state'),
 262                 $oParams->getString('country'),
 263                 $oParams->getString('postalcode')
 264             );
 265             $this->setReverseInPlan(false);
 266         } else {
 267             $this->setQuery($sQuery);
 268         }
 269     }
 270
 271     public function loadStructuredAddressElement($sValue, $sKey, $iNewMinAddressRank, $iNewMaxAddressRank, $aItemListValues)
 272     {
 273         $sValue = trim($sValue);
 274         if (!$sValue) return false;
 275         $this->aStructuredQuery[$sKey] = $sValue;
 276         if ($this->iMinAddressRank == 0 && $this->iMaxAddressRank == 30) {
 277             $this->iMinAddressRank = $iNewMinAddressRank;
 278             $this->iMaxAddressRank = $iNewMaxAddressRank;
 279         }
 280         if ($aItemListValues) $this->aAddressRankList = array_merge($this->aAddressRankList, $aItemListValues);
 281         return true;
 282     }
 283
 284     public function setStructuredQuery($sAmenity = false, $sStreet = false, $sCity = false, $sCounty = false, $sState = false, $sCountry = false, $sPostalCode = false)
 285     {
 286         $this->sQuery = false;
 287
 288         // Reset
 289         $this->iMinAddressRank = 0;
 290         $this->iMaxAddressRank = 30;
 291         $this->aAddressRankList = array();
 292
 293         $this->aStructuredQuery = array();
 294         $this->sAllowedTypesSQLList = false;
 295
 296         $this->loadStructuredAddressElement($sAmenity, 'amenity', 26, 30, false);
 297         $this->loadStructuredAddressElement($sStreet, 'street', 26, 30, false);
 298         $this->loadStructuredAddressElement($sCity, 'city', 14, 24, false);
 299         $this->loadStructuredAddressElement($sCounty, 'county', 9, 13, false);
 300         $this->loadStructuredAddressElement($sState, 'state', 8, 8, false);
 301         $this->loadStructuredAddressElement($sPostalCode, 'postalcode', 5, 11, array(5, 11));
 302         $this->loadStructuredAddressElement($sCountry, 'country', 4, 4, false);
 303
 304         if (!empty($this->aStructuredQuery)) {
 305             $this->sQuery = join(', ', $this->aStructuredQuery);
 306             if ($this->iMaxAddressRank < 30) {
 307                 $this->sAllowedTypesSQLList = '(\'place\',\'boundary\')';
 308             }
 309         }
 310     }
 311
 312     public function fallbackStructuredQuery()
 313     {
 314         if (!$this->aStructuredQuery) return false;
 315
 316         $aParams = $this->aStructuredQuery;
 317
 318         if (count($aParams) == 1) return false;
 319
 320         $aOrderToFallback = array('postalcode', 'street', 'city', 'county', 'state');
 321
 322         foreach ($aOrderToFallback as $sType) {
 323             if (isset($aParams[$sType])) {
 324                 unset($aParams[$sType]);
 325                 $this->setStructuredQuery(@$aParams['amenity'], @$aParams['street'], @$aParams['city'], @$aParams['county'], @$aParams['state'], @$aParams['country'], @$aParams['postalcode']);
 326                 return true;
 327             }
 328         }
 329
 330         return false;
 331     }
 332
 333     public function getGroupedSearches($aSearches, $aPhrases, $oValidTokens, $bIsStructured)
 334     {
 335         /*
 336              Calculate all searches using oValidTokens i.e.
 337              'Wodsworth Road, Sheffield' =>
 338
 339              Phrase Wordset
 340              0      0       (wodsworth road)
 341              0      1       (wodsworth)(road)
 342              1      0       (sheffield)
 343
 344              Score how good the search is so they can be ordered
 345          */
 346         foreach ($aPhrases as $iPhrase => $oPhrase) {
 347             $aNewPhraseSearches = array();
 348             $sPhraseType = $bIsStructured ? $oPhrase->getPhraseType() : '';
 349
 350             foreach ($oPhrase->getWordSets() as $aWordset) {
 351                 $aWordsetSearches = $aSearches;
 352
 353                 // Add all words from this wordset
 354                 foreach ($aWordset as $iToken => $sToken) {
 355                     //echo "<br><b>$sToken</b>";
 356                     $aNewWordsetSearches = array();
 357
 358                     foreach ($aWordsetSearches as $oCurrentSearch) {
 359                         //echo "<i>";
 360                         //var_dump($oCurrentSearch);
 361                         //echo "</i>";
 362
 363                         // Tokens with full name matches.
 364                         foreach ($oValidTokens->get(' '.$sToken) as $oSearchTerm) {
 365                             $aNewSearches = $oCurrentSearch->extendWithFullTerm(
 366                                 $oSearchTerm,
 367                                 $oValidTokens->contains($sToken)
 368                                   && strpos($sToken, ' ') === false,
 369                                 $sPhraseType,
 370                                 $iToken == 0 && $iPhrase == 0,
 371                                 $iPhrase == 0,
 372                                 $iToken + 1 == count($aWordset)
 373                                   && $iPhrase + 1 == count($aPhrases)
 374                             );
 375
 376                             foreach ($aNewSearches as $oSearch) {
 377                                 if ($oSearch->getRank() < $this->iMaxRank) {
 378                                     $aNewWordsetSearches[] = $oSearch;
 379                                 }
 380                             }
 381                         }
 382                         // Look for partial matches.
 383                         // Note that there is no point in adding country terms here
 384                         // because country is omitted in the address.
 385                         if ($sPhraseType != 'country') {
 386                             // Allow searching for a word - but at extra cost
 387                             foreach ($oValidTokens->get($sToken) as $oSearchTerm) {
 388                                 $aNewSearches = $oCurrentSearch->extendWithPartialTerm(
 389                                     $sToken,
 390                                     $oSearchTerm,
 391                                     $bIsStructured,
 392                                     $iPhrase,
 393                                     $oValidTokens->get(' '.$sToken)
 394                                 );
 395
 396                                 foreach ($aNewSearches as $oSearch) {
 397                                     if ($oSearch->getRank() < $this->iMaxRank) {
 398                                         $aNewWordsetSearches[] = $oSearch;
 399                                     }
 400                                 }
 401                             }
 402                         }
 403                     }
 404                     // Sort and cut
 405                     usort($aNewWordsetSearches, array('Nominatim\SearchDescription', 'bySearchRank'));
 406                     $aWordsetSearches = array_slice($aNewWordsetSearches, 0, 50);
 407                 }
 408                 //var_Dump('<hr>',count($aWordsetSearches)); exit;
 409
 410                 $aNewPhraseSearches = array_merge($aNewPhraseSearches, $aNewWordsetSearches);
 411                 usort($aNewPhraseSearches, array('Nominatim\SearchDescription', 'bySearchRank'));
 412
 413                 $aSearchHash = array();
 414                 foreach ($aNewPhraseSearches as $iSearch => $aSearch) {
 415                     $sHash = serialize($aSearch);
 416                     if (isset($aSearchHash[$sHash])) unset($aNewPhraseSearches[$iSearch]);
 417                     else $aSearchHash[$sHash] = 1;
 418                 }
 419
 420                 $aNewPhraseSearches = array_slice($aNewPhraseSearches, 0, 50);
 421             }
 422
 423             // Re-group the searches by their score, junk anything over 20 as just not worth trying
 424             $aGroupedSearches = array();
 425             foreach ($aNewPhraseSearches as $aSearch) {
 426                 $iRank = $aSearch->getRank();
 427                 if ($iRank < $this->iMaxRank) {
 428                     if (!isset($aGroupedSearches[$iRank])) {
 429                         $aGroupedSearches[$iRank] = array();
 430                     }
 431                     $aGroupedSearches[$iRank][] = $aSearch;
 432                 }
 433             }
 434             ksort($aGroupedSearches);
 435
 436             $iSearchCount = 0;
 437             $aSearches = array();
 438             foreach ($aGroupedSearches as $iScore => $aNewSearches) {
 439                 $iSearchCount += count($aNewSearches);
 440                 $aSearches = array_merge($aSearches, $aNewSearches);
 441                 if ($iSearchCount > 50) break;
 442             }
 443         }
 444
 445         // Revisit searches, drop bad searches and give penalty to unlikely combinations.
 446         $aGroupedSearches = array();
 447         foreach ($aSearches as $oSearch) {
 448             if (!$oSearch->isValidSearch()) {
 449                 continue;
 450             }
 451
 452             $iRank = $oSearch->getRank();
 453             if (!isset($aGroupedSearches[$iRank])) {
 454                 $aGroupedSearches[$iRank] = array();
 455             }
 456             $aGroupedSearches[$iRank][] = $oSearch;
 457         }
 458         ksort($aGroupedSearches);
 459
 460         return $aGroupedSearches;
 461     }
 462
 463     /* Perform the actual query lookup.
 464
 465         Returns an ordered list of results, each with the following fields:
 466             osm_type: type of corresponding OSM object
 467                         N - node
 468                         W - way
 469                         R - relation
 470                         P - postcode (internally computed)
 471             osm_id: id of corresponding OSM object
 472             class: general object class (corresponds to tag key of primary OSM tag)
 473             type: subclass of object (corresponds to tag value of primary OSM tag)
 474             admin_level: see https://wiki.openstreetmap.org/wiki/Admin_level
 475             rank_search: rank in search hierarchy
 476                         (see also https://wiki.openstreetmap.org/wiki/Nominatim/Development_overview#Country_to_street_level)
 477             rank_address: rank in address hierarchy (determines orer in address)
 478             place_id: internal key (may differ between different instances)
 479             country_code: ISO country code
 480             langaddress: localized full address
 481             placename: localized name of object
 482             ref: content of ref tag (if available)
 483             lon: longitude
 484             lat: latitude
 485             importance: importance of place based on Wikipedia link count
 486             addressimportance: cumulated importance of address elements
 487             extra_place: type of place (for admin boundaries, if there is a place tag)
 488             aBoundingBox: bounding Box
 489             label: short description of the object class/type (English only)
 490             name: full name (currently the same as langaddress)
 491             foundorder: secondary ordering for places with same importance
 492     */
 493
 494
 495     public function lookup()
 496     {
 497         Debug::newFunction('Geocode::lookup');
 498         if (!$this->sQuery && !$this->aStructuredQuery) return array();
 499
 500         Debug::printDebugArray('Geocode', $this);
 501
 502         $oCtx = new SearchContext();
 503
 504         if ($this->aRoutePoints) {
 505             $oCtx->setViewboxFromRoute(
 506                 $this->oDB,
 507                 $this->aRoutePoints,
 508                 $this->aRouteWidth,
 509                 $this->bBoundedSearch
 510             );
 511         } elseif ($this->aViewBox) {
 512             $oCtx->setViewboxFromBox($this->aViewBox, $this->bBoundedSearch);
 513         }
 514         if ($this->aExcludePlaceIDs) {
 515             $oCtx->setExcludeList($this->aExcludePlaceIDs);
 516         }
 517         if ($this->aCountryCodes) {
 518             $oCtx->setCountryList($this->aCountryCodes);
 519         }
 520
 521         Debug::newSection('Query Preprocessing');
 522
 523         $sNormQuery = $this->normTerm($this->sQuery);
 524         Debug::printVar('Normalized query', $sNormQuery);
 525
 526         $sLanguagePrefArraySQL = $this->oDB->getArraySQL(
 527             $this->oDB->getDBQuotedList($this->aLangPrefOrder)
 528         );
 529
 530         $sQuery = $this->sQuery;
 531         if (!preg_match('//u', $sQuery)) {
 532             userError('Query string is not UTF-8 encoded.');
 533         }
 534
 535         // Conflicts between US state abreviations and various words for 'the' in different languages
 536         if (isset($this->aLangPrefOrder['name:en'])) {
 537             $sQuery = preg_replace('/(^|,)\s*il\s*(,|$)/i', '\1illinois\2', $sQuery);
 538             $sQuery = preg_replace('/(^|,)\s*al\s*(,|$)/i', '\1alabama\2', $sQuery);
 539             $sQuery = preg_replace('/(^|,)\s*la\s*(,|$)/i', '\1louisiana\2', $sQuery);
 540         }
 541
 542         // Do we have anything that looks like a lat/lon pair?
 543         $sQuery = $oCtx->setNearPointFromQuery($sQuery);
 544
 545         if ($sQuery || $this->aStructuredQuery) {
 546             // Start with a single blank search
 547             $aSearches = array(new SearchDescription($oCtx));
 548
 549             if ($sQuery) {
 550                 $sQuery = $aSearches[0]->extractKeyValuePairs($sQuery);
 551             }
 552
 553             $sSpecialTerm = '';
 554             if ($sQuery) {
 555                 preg_match_all(
 556                     '/\\[([\\w ]*)\\]/u',
 557                     $sQuery,
 558                     $aSpecialTermsRaw,
 559                     PREG_SET_ORDER
 560                 );
 561                 if (!empty($aSpecialTermsRaw)) {
 562                     Debug::printVar('Special terms', $aSpecialTermsRaw);
 563                 }
 564
 565                 foreach ($aSpecialTermsRaw as $aSpecialTerm) {
 566                     $sQuery = str_replace($aSpecialTerm[0], ' ', $sQuery);
 567                     if (!$sSpecialTerm) {
 568                         $sSpecialTerm = $aSpecialTerm[1];
 569                     }
 570                 }
 571             }
 572             if (!$sSpecialTerm && $this->aStructuredQuery
 573                 && isset($this->aStructuredQuery['amenity'])) {
 574                 $sSpecialTerm = $this->aStructuredQuery['amenity'];
 575                 unset($this->aStructuredQuery['amenity']);
 576             }
 577
 578             if ($sSpecialTerm && !$aSearches[0]->hasOperator()) {
 579                 $sSpecialTerm = pg_escape_string($sSpecialTerm);
 580                 $sToken = $this->oDB->getOne(
 581                     'SELECT make_standard_name(:term)',
 582                     array(':term' => $sSpecialTerm),
 583                     'Cannot decode query. Wrong encoding?'
 584                 );
 585                 $sSQL = 'SELECT class, type FROM word ';
 586                 $sSQL .= '   WHERE word_token in (\' '.$sToken.'\')';
 587                 $sSQL .= '   AND class is not null AND class not in (\'place\')';
 588
 589                 Debug::printSQL($sSQL);
 590                 $aSearchWords = $this->oDB->getAll($sSQL);
 591                 $aNewSearches = array();
 592                 foreach ($aSearches as $oSearch) {
 593                     foreach ($aSearchWords as $aSearchTerm) {
 594                         $oNewSearch = clone $oSearch;
 595                         $oNewSearch->setPoiSearch(
 596                             Operator::TYPE,
 597                             $aSearchTerm['class'],
 598                             $aSearchTerm['type']
 599                         );
 600                         $aNewSearches[] = $oNewSearch;
 601                     }
 602                 }
 603                 $aSearches = $aNewSearches;
 604             }
 605
 606             // Split query into phrases
 607             // Commas are used to reduce the search space by indicating where phrases split
 608             if ($this->aStructuredQuery) {
 609                 $aInPhrases = $this->aStructuredQuery;
 610                 $bStructuredPhrases = true;
 611             } else {
 612                 $aInPhrases = explode(',', $sQuery);
 613                 $bStructuredPhrases = false;
 614             }
 615
 616             Debug::printDebugArray('Search context', $oCtx);
 617             Debug::printDebugArray('Base search', empty($aSearches) ? null : $aSearches[0]);
 618             Debug::printVar('Final query phrases', $aInPhrases);
 619
 620             // Convert each phrase to standard form
 621             // Create a list of standard words
 622             // Get all 'sets' of words
 623             // Generate a complete list of all
 624             Debug::newSection('Tokenization');
 625             $aTokens = array();
 626             $aPhrases = array();
 627             foreach ($aInPhrases as $iPhrase => $sPhrase) {
 628                 $sPhrase = $this->oDB->getOne(
 629                     'SELECT make_standard_name(:phrase)',
 630                     array(':phrase' => $sPhrase),
 631                     'Cannot normalize query string (is it a UTF-8 string?)'
 632                 );
 633                 if (trim($sPhrase)) {
 634                     $oPhrase = new Phrase($sPhrase, is_string($iPhrase) ? $iPhrase : '');
 635                     $oPhrase->addTokens($aTokens);
 636                     $aPhrases[] = $oPhrase;
 637                 }
 638             }
 639
 640             Debug::printVar('Tokens', $aTokens);
 641
 642             $oValidTokens = new TokenList();
 643
 644             if (!empty($aTokens)) {
 645                 $sSQL = 'SELECT word_id, word_token, word, class, type, country_code, operator, search_name_count';
 646                 $sSQL .= ' FROM word ';
 647                 $sSQL .= ' WHERE word_token in ('.join(',', $this->oDB->getDBQuotedList($aTokens)).')';
 648
 649                 Debug::printSQL($sSQL);
 650
 651                 $oValidTokens->addTokensFromDB(
 652                     $this->oDB,
 653                     $aTokens,
 654                     $this->aCountryCodes,
 655                     $sNormQuery,
 656                     $this->oNormalizer
 657                 );
 658
 659                 // Try more interpretations for Tokens that could not be matched.
 660                 foreach ($aTokens as $sToken) {
 661                     if ($sToken[0] == ' ' && !$oValidTokens->contains($sToken)) {
 662                         if (preg_match('/^ ([0-9]{5}) [0-9]{4}$/', $sToken, $aData)) {
 663                             // US ZIP+4 codes - merge in the 5-digit ZIP code
 664                             $oValidTokens->addToken(
 665                                 $sToken,
 666                                 new Token\Postcode(null, $aData[1], 'us')
 667                             );
 668                         } elseif (preg_match('/^ [0-9]+$/', $sToken)) {
 669                             // Unknown single word token with a number.
 670                             // Assume it is a house number.
 671                             $oValidTokens->addToken(
 672                                 $sToken,
 673                                 new Token\HouseNumber(null, trim($sToken))
 674                             );
 675                         }
 676                     }
 677                 }
 678
 679                 // Any words that have failed completely?
 680                 // TODO: suggestions
 681
 682                 Debug::printGroupTable('Valid Tokens', $oValidTokens->debugInfo());
 683
 684                 foreach ($aPhrases as $oPhrase) {
 685                     $oPhrase->computeWordSets($oValidTokens);
 686                 }
 687                 Debug::printDebugTable('Phrases', $aPhrases);
 688
 689                 Debug::newSection('Search candidates');
 690
 691                 $aGroupedSearches = $this->getGroupedSearches($aSearches, $aPhrases, $oValidTokens, $bStructuredPhrases);
 692
 693                 if ($this->bReverseInPlan) {
 694                     // Reverse phrase array and also reverse the order of the wordsets in
 695                     // the first and final phrase. Don't bother about phrases in the middle
 696                     // because order in the address doesn't matter.
 697                     $aPhrases = array_reverse($aPhrases);
 698                     $aPhrases[0]->invertWordSets();
 699                     if (count($aPhrases) > 1) {
 700                         $aPhrases[count($aPhrases)-1]->invertWordSets();
 701                     }
 702                     $aReverseGroupedSearches = $this->getGroupedSearches($aSearches, $aPhrases, $oValidTokens, false);
 703
 704                     foreach ($aGroupedSearches as $aSearches) {
 705                         foreach ($aSearches as $aSearch) {
 706                             if (!isset($aReverseGroupedSearches[$aSearch->getRank()])) {
 707                                 $aReverseGroupedSearches[$aSearch->getRank()] = array();
 708                             }
 709                             $aReverseGroupedSearches[$aSearch->getRank()][] = $aSearch;
 710                         }
 711                     }
 712
 713                     $aGroupedSearches = $aReverseGroupedSearches;
 714                     ksort($aGroupedSearches);
 715                 }
 716             } else {
 717                 // Re-group the searches by their score, junk anything over 20 as just not worth trying
 718                 $aGroupedSearches = array();
 719                 foreach ($aSearches as $aSearch) {
 720                     if ($aSearch->getRank() < $this->iMaxRank) {
 721                         if (!isset($aGroupedSearches[$aSearch->getRank()])) $aGroupedSearches[$aSearch->getRank()] = array();
 722                         $aGroupedSearches[$aSearch->getRank()][] = $aSearch;
 723                     }
 724                 }
 725                 ksort($aGroupedSearches);
 726             }
 727
 728             // Filter out duplicate searches
 729             $aSearchHash = array();
 730             foreach ($aGroupedSearches as $iGroup => $aSearches) {
 731                 foreach ($aSearches as $iSearch => $aSearch) {
 732                     $sHash = serialize($aSearch);
 733                     if (isset($aSearchHash[$sHash])) {
 734                         unset($aGroupedSearches[$iGroup][$iSearch]);
 735                         if (empty($aGroupedSearches[$iGroup])) unset($aGroupedSearches[$iGroup]);
 736                     } else {
 737                         $aSearchHash[$sHash] = 1;
 738                     }
 739                 }
 740             }
 741
 742             Debug::printGroupedSearch(
 743                 $aGroupedSearches,
 744                 $oValidTokens->debugTokenByWordIdList()
 745             );
 746
 747             // Start the search process
 748             $iGroupLoop = 0;
 749             $iQueryLoop = 0;
 750             $aNextResults = array();
 751             foreach ($aGroupedSearches as $iGroupedRank => $aSearches) {
 752                 $iGroupLoop++;
 753                 $aResults = $aNextResults;
 754                 foreach ($aSearches as $oSearch) {
 755                     $iQueryLoop++;
 756
 757                     Debug::newSection("Search Loop, group $iGroupLoop, loop $iQueryLoop");
 758                     Debug::printGroupedSearch(
 759                         array($iGroupedRank => array($oSearch)),
 760                         $oValidTokens->debugTokenByWordIdList()
 761                     );
 762
 763                     $aNewResults = $oSearch->query(
 764                         $this->oDB,
 765                         $this->iMinAddressRank,
 766                         $this->iMaxAddressRank,
 767                         $this->iLimit
 768                     );
 769
 770                     // The same result may appear in different rounds, only
 771                     // use the one with minimal rank.
 772                     foreach ($aNewResults as $iPlace => $oRes) {
 773                         if (!isset($aResults[$iPlace])
 774                             || $aResults[$iPlace]->iResultRank > $oRes->iResultRank) {
 775                             $aResults[$iPlace] = $oRes;
 776                         }
 777                     }
 778
 779                     if ($iQueryLoop > 20) break;
 780                 }
 781
 782                 if (!empty($aResults)) {
 783                     $aSplitResults = Result::splitResults($aResults);
 784                     Debug::printVar('Split results', $aSplitResults);
 785                     if ($iGroupLoop <= 4 && empty($aSplitResults['tail'])
 786                         && reset($aSplitResults['head'])->iResultRank > 0) {
 787                         // Haven't found an exact match for the query yet.
 788                         // Therefore add result from the next group level.
 789                         $aNextResults = $aSplitResults['head'];
 790                         foreach ($aNextResults as $oRes) {
 791                             $oRes->iResultRank--;
 792                         }
 793                         $aResults = array();
 794                     } else {
 795                         $aResults = $aSplitResults['head'];
 796                     }
 797                 }
 798
 799                 if (!empty($aResults) && ($this->iMinAddressRank != 0 || $this->iMaxAddressRank != 30)) {
 800                     // Need to verify passes rank limits before dropping out of the loop (yuk!)
 801                     // reduces the number of place ids, like a filter
 802                     // rank_address is 30 for interpolated housenumbers
 803                     $aFilterSql = array();
 804                     $sPlaceIds = Result::joinIdsByTable($aResults, Result::TABLE_PLACEX);
 805                     if ($sPlaceIds) {
 806                         $sSQL = 'SELECT place_id FROM placex ';
 807                         $sSQL .= 'WHERE place_id in ('.$sPlaceIds.') ';
 808                         $sSQL .= '  AND (';
 809                         $sSQL .= "         placex.rank_address between $this->iMinAddressRank and $this->iMaxAddressRank ";
 810                         $sSQL .= "         OR placex.rank_search between $this->iMinAddressRank and $this->iMaxAddressRank ";
 811                         if ($this->aAddressRankList) {
 812                             $sSQL .= '     OR placex.rank_address in ('.join(',', $this->aAddressRankList).')';
 813                         }
 814                         $sSQL .= ')';
 815                         $aFilterSql[] = $sSQL;
 816                     }
 817                     $sPlaceIds = Result::joinIdsByTable($aResults, Result::TABLE_POSTCODE);
 818                     if ($sPlaceIds) {
 819                         $sSQL = ' SELECT place_id FROM location_postcode lp ';
 820                         $sSQL .= 'WHERE place_id in ('.$sPlaceIds.') ';
 821                         $sSQL .= "  AND (lp.rank_address between $this->iMinAddressRank and $this->iMaxAddressRank ";
 822                         if ($this->aAddressRankList) {
 823                             $sSQL .= '     OR lp.rank_address in ('.join(',', $this->aAddressRankList).')';
 824                         }
 825                         $sSQL .= ') ';
 826                         $aFilterSql[] = $sSQL;
 827                     }
 828
 829                     $aFilteredIDs = array();
 830                     if ($aFilterSql) {
 831                         $sSQL = join(' UNION ', $aFilterSql);
 832                         Debug::printSQL($sSQL);
 833                         $aFilteredIDs = $this->oDB->getCol($sSQL);
 834                     }
 835
 836                     $tempIDs = array();
 837                     foreach ($aResults as $oResult) {
 838                         if (($this->iMaxAddressRank == 30 &&
 839                              ($oResult->iTable == Result::TABLE_OSMLINE
 840                               || $oResult->iTable == Result::TABLE_AUX
 841                               || $oResult->iTable == Result::TABLE_TIGER))
 842                             || in_array($oResult->iId, $aFilteredIDs)
 843                         ) {
 844                             $tempIDs[$oResult->iId] = $oResult;
 845                         }
 846                     }
 847                     $aResults = $tempIDs;
 848                 }
 849
 850                 if (!empty($aResults)) break;
 851                 if ($iGroupLoop > 4) break;
 852                 if ($iQueryLoop > 30) break;
 853             }
 854         } else {
 855             // Just interpret as a reverse geocode
 856             $oReverse = new ReverseGeocode($this->oDB);
 857             $oReverse->setZoom(18);
 858
 859             $oLookup = $oReverse->lookupPoint($oCtx->sqlNear, false);
 860
 861             Debug::printVar('Reverse search', $oLookup);
 862
 863             if ($oLookup) {
 864                 $aResults = array($oLookup->iId => $oLookup);
 865             }
 866         }
 867
 868         // No results? Done
 869         if (empty($aResults)) {
 870             if ($this->bFallback) {
 871                 if ($this->fallbackStructuredQuery()) {
 872                     return $this->lookup();
 873                 }
 874             }
 875
 876             return array();
 877         }
 878
 879         if ($this->aAddressRankList) {
 880             $this->oPlaceLookup->setAddressRankList($this->aAddressRankList);
 881         }
 882         $this->oPlaceLookup->setAllowedTypesSQLList($this->sAllowedTypesSQLList);
 883         $this->oPlaceLookup->setLanguagePreference($this->aLangPrefOrder);
 884         if ($oCtx->hasNearPoint()) {
 885             $this->oPlaceLookup->setAnchorSql($oCtx->sqlNear);
 886         }
 887
 888         $aSearchResults = $this->oPlaceLookup->lookup($aResults);
 889
 890         $aRecheckWords = preg_split('/\b[\s,\\-]*/u', $sQuery);
 891         foreach ($aRecheckWords as $i => $sWord) {
 892             if (!preg_match('/[\pL\pN]/', $sWord)) unset($aRecheckWords[$i]);
 893         }
 894
 895         Debug::printVar('Recheck words', $aRecheckWords);
 896
 897         foreach ($aSearchResults as $iIdx => $aResult) {
 898             $fRadius = ClassTypes\getDefRadius($aResult);
 899
 900             $aOutlineResult = $this->oPlaceLookup->getOutlines($aResult['place_id'], $aResult['lon'], $aResult['lat'], $fRadius);
 901             if ($aOutlineResult) {
 902                 $aResult = array_merge($aResult, $aOutlineResult);
 903             }
 904
 905             // Is there an icon set for this type of result?
 906             $sIcon = ClassTypes\getIconFile($aResult);
 907             if (isset($sIcon)) {
 908                 $aResult['icon'] = $sIcon;
 909             }
 910
 911             $sLabel = ClassTypes\getLabel($aResult);
 912             if (isset($sLabel)) {
 913                 $aResult['label'] = $sLabel;
 914             }
 915             $aResult['name'] = $aResult['langaddress'];
 916
 917             if ($oCtx->hasNearPoint()) {
 918                 $aResult['importance'] = 0.001;
 919                 $aResult['foundorder'] = $aResult['addressimportance'];
 920             } else {
 921                 $aResult['importance'] = max(0.001, $aResult['importance']);
 922                 $aResult['importance'] *= $this->viewboxImportanceFactor(
 923                     $aResult['lon'],
 924                     $aResult['lat']
 925                 );
 926                 // Adjust importance for the number of exact string matches in the result
 927                 $iCountWords = 0;
 928                 $sAddress = $aResult['langaddress'];
 929                 foreach ($aRecheckWords as $i => $sWord) {
 930                     if (stripos($sAddress, $sWord)!==false) {
 931                         $iCountWords++;
 932                         if (preg_match('/(^|,)\s*'.preg_quote($sWord, '/').'\s*(,|$)/', $sAddress)) $iCountWords += 0.1;
 933                     }
 934                 }
 935
 936                 $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
 937
 938                 // secondary ordering (for results with same importance (the smaller the better):
 939                 // - approximate importance of address parts
 940                 $aResult['foundorder'] = -$aResult['addressimportance']/10;
 941                 // - number of exact matches from the query
 942                 $aResult['foundorder'] -= $aResults[$aResult['place_id']]->iExactMatches;
 943                 // - importance of the class/type
 944                 $iClassImportance = ClassTypes\getImportance($aResult);
 945                 if (isset($iClassImportance)) {
 946                     $aResult['foundorder'] += 0.0001 * $iClassImportance;
 947                 } else {
 948                     $aResult['foundorder'] += 0.01;
 949                 }
 950             }
 951             $aSearchResults[$iIdx] = $aResult;
 952         }
 953         uasort($aSearchResults, 'byImportance');
 954         Debug::printVar('Pre-filter results', $aSearchResults);
 955
 956         $aOSMIDDone = array();
 957         $aClassTypeNameDone = array();
 958         $aToFilter = $aSearchResults;
 959         $aSearchResults = array();
 960
 961         $bFirst = true;
 962         foreach ($aToFilter as $aResult) {
 963             $this->aExcludePlaceIDs[$aResult['place_id']] = $aResult['place_id'];
 964             if ($bFirst) {
 965                 $fLat = $aResult['lat'];
 966                 $fLon = $aResult['lon'];
 967                 if (isset($aResult['zoom'])) $iZoom = $aResult['zoom'];
 968                 $bFirst = false;
 969             }
 970             if (!$this->oPlaceLookup->doDeDupe() || (!isset($aOSMIDDone[$aResult['osm_type'].$aResult['osm_id']])
 971                 && !isset($aClassTypeNameDone[$aResult['osm_type'].$aResult['class'].$aResult['type'].$aResult['name'].$aResult['admin_level']]))
 972             ) {
 973                 $aOSMIDDone[$aResult['osm_type'].$aResult['osm_id']] = true;
 974                 $aClassTypeNameDone[$aResult['osm_type'].$aResult['class'].$aResult['type'].$aResult['name'].$aResult['admin_level']] = true;
 975                 $aSearchResults[] = $aResult;
 976             }
 977
 978             // Absolute limit on number of results
 979             if (count($aSearchResults) >= $this->iFinalLimit) break;
 980         }
 981
 982         Debug::printVar('Post-filter results', $aSearchResults);
 983         return $aSearchResults;
 984     } // end lookup()
 985
 986     public function debugInfo()
 987     {
 988         return array(
 989                 'Query' => $this->sQuery,
 990                 'Structured query' => $this->aStructuredQuery,
 991                 'Name keys' => Debug::fmtArrayVals($this->aLangPrefOrder),
 992                 'Excluded place IDs' => Debug::fmtArrayVals($this->aExcludePlaceIDs),
 993                 'Try reversed query'=> $this->bReverseInPlan,
 994                 'Limit (for searches)' => $this->iLimit,
 995                 'Limit (for results)'=> $this->iFinalLimit,
 996                 'Country codes' => Debug::fmtArrayVals($this->aCountryCodes),
 997                 'Bounded search' => $this->bBoundedSearch,
 998                 'Viewbox' => Debug::fmtArrayVals($this->aViewBox),
 999                 'Route points' => Debug::fmtArrayVals($this->aRoutePoints),
1000                 'Route width' => $this->aRouteWidth,
1001                 'Max rank' => $this->iMaxRank,
1002                 'Min address rank' => $this->iMinAddressRank,
1003                 'Max address rank' => $this->iMaxAddressRank,
1004                 'Address rank list' => Debug::fmtArrayVals($this->aAddressRankList)
1005                );
1006     }
1007 } // end class