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Merge remote-tracking branch 'upstream/master'
[nominatim.git] / lib / Geocode.php
diff --git a/lib/Geocode.php b/lib/Geocode.php
index 4072aae2f5b0db27bf39bec37961b9bc853b1772..12410acc81a03373bdbd9e44d1dbee84daf13307 100644 (file)
--- a/lib/Geocode.php
+++ b/lib/Geocode.php
@@ -7,6 +7,7 @@ require_once(CONST_BasePath.'/lib/Phrase.php');
 require_once(CONST_BasePath.'/lib/ReverseGeocode.php');
 require_once(CONST_BasePath.'/lib/SearchDescription.php');
 require_once(CONST_BasePath.'/lib/SearchContext.php');
 require_once(CONST_BasePath.'/lib/ReverseGeocode.php');
 require_once(CONST_BasePath.'/lib/SearchDescription.php');
 require_once(CONST_BasePath.'/lib/SearchContext.php');
+require_once(CONST_BasePath.'/lib/TokenList.php');
 
 class Geocode
 {
 
 class Geocode
 {
@@ -16,10 +17,8 @@ class Geocode
 
     protected $aLangPrefOrder = array();
 
 
     protected $aLangPrefOrder = array();
 
-    protected $bIncludeAddressDetails = false;
-
     protected $aExcludePlaceIDs = array();
     protected $aExcludePlaceIDs = array();
-    protected $bReverseInPlan = false;
+    protected $bReverseInPlan = true;
 
     protected $iLimit = 20;
     protected $iFinalLimit = 10;
 
     protected $iLimit = 20;
     protected $iFinalLimit = 10;
@@ -86,7 +85,6 @@ class Geocode
             $aParams['exclude_place_ids'] = implode(',', $this->aExcludePlaceIDs);
         }
 
             $aParams['exclude_place_ids'] = implode(',', $this->aExcludePlaceIDs);
         }
 
-        if ($this->bIncludeAddressDetails) $aParams['addressdetails'] = '1';
         if ($this->bBoundedSearch) $aParams['bounded'] = '1';
 
         if ($this->aCountryCodes) {
         if ($this->bBoundedSearch) $aParams['bounded'] = '1';
 
         if ($this->aCountryCodes) {
@@ -151,6 +149,10 @@ class Geocode
 
     private function viewboxImportanceFactor($fX, $fY)
     {
 
     private function viewboxImportanceFactor($fX, $fY)
     {
+        if (!$this->aViewBox) {
+            return 1;
+        }
+
         $fWidth = ($this->aViewBox[2] - $this->aViewBox[0])/2;
         $fHeight = ($this->aViewBox[3] - $this->aViewBox[1])/2;
 
         $fWidth = ($this->aViewBox[2] - $this->aViewBox[0])/2;
         $fHeight = ($this->aViewBox[3] - $this->aViewBox[1])/2;
 
@@ -182,9 +184,6 @@ class Geocode
 
     public function loadParamArray($oParams, $sForceGeometryType = null)
     {
 
     public function loadParamArray($oParams, $sForceGeometryType = null)
     {
-        $this->bIncludeAddressDetails
-         = $oParams->getBool('addressdetails', $this->bIncludeAddressDetails);
-
         $this->bBoundedSearch = $oParams->getBool('bounded', $this->bBoundedSearch);
 
         $this->setLimit($oParams->getInt('limit', $this->iFinalLimit));
         $this->bBoundedSearch = $oParams->getBool('bounded', $this->bBoundedSearch);
 
         $this->setLimit($oParams->getInt('limit', $this->iFinalLimit));
@@ -225,14 +224,14 @@ class Geocode
         $aViewbox = $oParams->getStringList('viewboxlbrt');
         if ($aViewbox) {
             if (count($aViewbox) != 4) {
         $aViewbox = $oParams->getStringList('viewboxlbrt');
         if ($aViewbox) {
             if (count($aViewbox) != 4) {
-                userError("Bad parmater 'viewboxlbrt'. Expected 4 coordinates.");
+                userError("Bad parameter 'viewboxlbrt'. Expected 4 coordinates.");
             }
             $this->setViewbox($aViewbox);
         } else {
             $aViewbox = $oParams->getStringList('viewbox');
             if ($aViewbox) {
                 if (count($aViewbox) != 4) {
             }
             $this->setViewbox($aViewbox);
         } else {
             $aViewbox = $oParams->getStringList('viewbox');
             if ($aViewbox) {
                 if (count($aViewbox) != 4) {
-                    userError("Bad parmater 'viewbox'. Expected 4 coordinates.");
+                    userError("Bad parameter 'viewbox'. Expected 4 coordinates.");
                 }
                 $this->setViewBox($aViewbox);
             } else {
                 }
                 $this->setViewBox($aViewbox);
             } else {
@@ -246,8 +245,8 @@ class Geocode
         }
 
         $this->oPlaceLookup->loadParamArray($oParams, $sForceGeometryType);
         }
 
         $this->oPlaceLookup->loadParamArray($oParams, $sForceGeometryType);
-        $this->oPlaceLookup->setIncludeAddressDetails(false);
         $this->oPlaceLookup->setIncludePolygonAsPoints($oParams->getBool('polygon'));
         $this->oPlaceLookup->setIncludePolygonAsPoints($oParams->getBool('polygon'));
+        $this->oPlaceLookup->setIncludeAddressDetails($oParams->getBool('addressdetails', false));
     }
 
     public function setQueryFromParams($oParams)
     }
 
     public function setQueryFromParams($oParams)
@@ -303,7 +302,7 @@ class Geocode
         $this->loadStructuredAddressElement($sPostalCode, 'postalcode', 5, 11, array(5, 11));
         $this->loadStructuredAddressElement($sCountry, 'country', 4, 4, false);
 
         $this->loadStructuredAddressElement($sPostalCode, 'postalcode', 5, 11, array(5, 11));
         $this->loadStructuredAddressElement($sCountry, 'country', 4, 4, false);
 
-        if (sizeof($this->aStructuredQuery) > 0) {
+        if (!empty($this->aStructuredQuery)) {
             $this->sQuery = join(', ', $this->aStructuredQuery);
             if ($this->iMaxAddressRank < 30) {
                 $this->sAllowedTypesSQLList = '(\'place\',\'boundary\')';
             $this->sQuery = join(', ', $this->aStructuredQuery);
             if ($this->iMaxAddressRank < 30) {
                 $this->sAllowedTypesSQLList = '(\'place\',\'boundary\')';
@@ -317,7 +316,7 @@ class Geocode
 
         $aParams = $this->aStructuredQuery;
 
 
         $aParams = $this->aStructuredQuery;
 
-        if (sizeof($aParams) == 1) return false;
+        if (count($aParams) == 1) return false;
 
         $aOrderToFallback = array('postalcode', 'street', 'city', 'county', 'state');
 
 
         $aOrderToFallback = array('postalcode', 'street', 'city', 'county', 'state');
 
@@ -332,10 +331,10 @@ class Geocode
         return false;
     }
 
         return false;
     }
 
-    public function getGroupedSearches($aSearches, $aPhrases, $aValidTokens, $bIsStructured)
+    public function getGroupedSearches($aSearches, $aPhrases, $oValidTokens, $bIsStructured)
     {
         /*
     {
         /*
-             Calculate all searches using aValidTokens i.e.
+             Calculate all searches using oValidTokens i.e.
              'Wodsworth Road, Sheffield' =>
 
              Phrase Wordset
              'Wodsworth Road, Sheffield' =>
 
              Phrase Wordset
@@ -349,10 +348,7 @@ class Geocode
             $aNewPhraseSearches = array();
             $sPhraseType = $bIsStructured ? $oPhrase->getPhraseType() : '';
 
             $aNewPhraseSearches = array();
             $sPhraseType = $bIsStructured ? $oPhrase->getPhraseType() : '';
 
-            foreach ($oPhrase->getWordSets() as $iWordSet => $aWordset) {
-                // Too many permutations - too expensive
-                if ($iWordSet > 120) break;
-
+            foreach ($oPhrase->getWordSets() as $aWordset) {
                 $aWordsetSearches = $aSearches;
 
                 // Add all words from this wordset
                 $aWordsetSearches = $aSearches;
 
                 // Add all words from this wordset
@@ -365,38 +361,37 @@ class Geocode
                         //var_dump($oCurrentSearch);
                         //echo "</i>";
 
                         //var_dump($oCurrentSearch);
                         //echo "</i>";
 
-                        // If the token is valid
-                        if (isset($aValidTokens[' '.$sToken])) {
-                            foreach ($aValidTokens[' '.$sToken] as $aSearchTerm) {
-                                $aNewSearches = $oCurrentSearch->extendWithFullTerm(
-                                    $aSearchTerm,
-                                    isset($aValidTokens[$sToken])
-                                      && strpos($sToken, ' ') === false,
-                                    $sPhraseType,
-                                    $iToken == 0 && $iPhrase == 0,
-                                    $iPhrase == 0,
-                                    $iToken + 1 == sizeof($aWordset)
-                                      && $iPhrase + 1 == sizeof($aPhrases)
-                                );
-
-                                foreach ($aNewSearches as $oSearch) {
-                                    if ($oSearch->getRank() < $this->iMaxRank) {
-                                        $aNewWordsetSearches[] = $oSearch;
-                                    }
+                        // Tokens with full name matches.
+                        foreach ($oValidTokens->get(' '.$sToken) as $oSearchTerm) {
+                            $aNewSearches = $oCurrentSearch->extendWithFullTerm(
+                                $oSearchTerm,
+                                $oValidTokens->contains($sToken)
+                                  && strpos($sToken, ' ') === false,
+                                $sPhraseType,
+                                $iToken == 0 && $iPhrase == 0,
+                                $iPhrase == 0,
+                                $iToken + 1 == count($aWordset)
+                                  && $iPhrase + 1 == count($aPhrases)
+                            );
+
+                            foreach ($aNewSearches as $oSearch) {
+                                if ($oSearch->getRank() < $this->iMaxRank) {
+                                    $aNewWordsetSearches[] = $oSearch;
                                 }
                             }
                         }
                         // Look for partial matches.
                         // Note that there is no point in adding country terms here
                         // because country is omitted in the address.
                                 }
                             }
                         }
                         // Look for partial matches.
                         // Note that there is no point in adding country terms here
                         // because country is omitted in the address.
-                        if (isset($aValidTokens[$sToken]) && $sPhraseType != 'country') {
+                        if ($sPhraseType != 'country') {
                             // Allow searching for a word - but at extra cost
                             // Allow searching for a word - but at extra cost
-                            foreach ($aValidTokens[$sToken] as $aSearchTerm) {
+                            foreach ($oValidTokens->get($sToken) as $oSearchTerm) {
                                 $aNewSearches = $oCurrentSearch->extendWithPartialTerm(
                                 $aNewSearches = $oCurrentSearch->extendWithPartialTerm(
-                                    $aSearchTerm,
+                                    $sToken,
+                                    $oSearchTerm,
                                     $bIsStructured,
                                     $iPhrase,
                                     $bIsStructured,
                                     $iPhrase,
-                                    isset($aValidTokens[' '.$sToken]) ? $aValidTokens[' '.$sToken] : array()
+                                    $oValidTokens->get(' '.$sToken)
                                 );
 
                                 foreach ($aNewSearches as $oSearch) {
                                 );
 
                                 foreach ($aNewSearches as $oSearch) {
@@ -411,7 +406,7 @@ class Geocode
                     usort($aNewWordsetSearches, array('Nominatim\SearchDescription', 'bySearchRank'));
                     $aWordsetSearches = array_slice($aNewWordsetSearches, 0, 50);
                 }
                     usort($aNewWordsetSearches, array('Nominatim\SearchDescription', 'bySearchRank'));
                     $aWordsetSearches = array_slice($aNewWordsetSearches, 0, 50);
                 }
-                //var_Dump('<hr>',sizeof($aWordsetSearches)); exit;
+                //var_Dump('<hr>',count($aWordsetSearches)); exit;
 
                 $aNewPhraseSearches = array_merge($aNewPhraseSearches, $aNewWordsetSearches);
                 usort($aNewPhraseSearches, array('Nominatim\SearchDescription', 'bySearchRank'));
 
                 $aNewPhraseSearches = array_merge($aNewPhraseSearches, $aNewWordsetSearches);
                 usort($aNewPhraseSearches, array('Nominatim\SearchDescription', 'bySearchRank'));
@@ -442,12 +437,10 @@ class Geocode
             $iSearchCount = 0;
             $aSearches = array();
             foreach ($aGroupedSearches as $iScore => $aNewSearches) {
             $iSearchCount = 0;
             $aSearches = array();
             foreach ($aGroupedSearches as $iScore => $aNewSearches) {
-                $iSearchCount += sizeof($aNewSearches);
+                $iSearchCount += count($aNewSearches);
                 $aSearches = array_merge($aSearches, $aNewSearches);
                 if ($iSearchCount > 50) break;
             }
                 $aSearches = array_merge($aSearches, $aNewSearches);
                 if ($iSearchCount > 50) break;
             }
-
-            //if (CONST_Debug) _debugDumpGroupedSearches($aGroupedSearches, $aValidTokens);
         }
 
         // Revisit searches, drop bad searches and give penalty to unlikely combinations.
         }
 
         // Revisit searches, drop bad searches and give penalty to unlikely combinations.
@@ -457,6 +450,7 @@ class Geocode
                 continue;
             }
 
                 continue;
             }
 
+            $iRank = $oSearch->getRank();
             if (!isset($aGroupedSearches[$iRank])) {
                 $aGroupedSearches[$iRank] = array();
             }
             if (!isset($aGroupedSearches[$iRank])) {
                 $aGroupedSearches[$iRank] = array();
             }
@@ -478,9 +472,9 @@ class Geocode
             osm_id: id of corresponding OSM object
             class: general object class (corresponds to tag key of primary OSM tag)
             type: subclass of object (corresponds to tag value of primary OSM tag)
             osm_id: id of corresponding OSM object
             class: general object class (corresponds to tag key of primary OSM tag)
             type: subclass of object (corresponds to tag value of primary OSM tag)
-            admin_level: see http://wiki.openstreetmap.org/wiki/Admin_level
+            admin_level: see https://wiki.openstreetmap.org/wiki/Admin_level
             rank_search: rank in search hierarchy
             rank_search: rank in search hierarchy
-                        (see also http://wiki.openstreetmap.org/wiki/Nominatim/Development_overview#Country_to_street_level)
+                        (see also https://wiki.openstreetmap.org/wiki/Nominatim/Development_overview#Country_to_street_level)
             rank_address: rank in address hierarchy (determines orer in address)
             place_id: internal key (may differ between different instances)
             country_code: ISO country code
             rank_address: rank in address hierarchy (determines orer in address)
             place_id: internal key (may differ between different instances)
             country_code: ISO country code
@@ -501,8 +495,11 @@ class Geocode
 
     public function lookup()
     {
 
     public function lookup()
     {
+        Debug::newFunction('Geocode::lookup');
         if (!$this->sQuery && !$this->aStructuredQuery) return array();
 
         if (!$this->sQuery && !$this->aStructuredQuery) return array();
 
+        Debug::printDebugArray('Geocode', $this);
+
         $oCtx = new SearchContext();
 
         if ($this->aRoutePoints) {
         $oCtx = new SearchContext();
 
         if ($this->aRoutePoints) {
@@ -522,27 +519,30 @@ class Geocode
             $oCtx->setCountryList($this->aCountryCodes);
         }
 
             $oCtx->setCountryList($this->aCountryCodes);
         }
 
+        Debug::newSection('Query Preprocessing');
+
         $sNormQuery = $this->normTerm($this->sQuery);
         $sNormQuery = $this->normTerm($this->sQuery);
-        $sLanguagePrefArraySQL = getArraySQL(
-            array_map("getDBQuoted", $this->aLangPrefOrder)
+        Debug::printVar('Normalized query', $sNormQuery);
+
+        $sLanguagePrefArraySQL = $this->oDB->getArraySQL(
+            $this->oDB->getDBQuotedList($this->aLangPrefOrder)
         );
 
         $sQuery = $this->sQuery;
         if (!preg_match('//u', $sQuery)) {
         );
 
         $sQuery = $this->sQuery;
         if (!preg_match('//u', $sQuery)) {
-            userError("Query string is not UTF-8 encoded.");
+            userError('Query string is not UTF-8 encoded.');
         }
 
         // Conflicts between US state abreviations and various words for 'the' in different languages
         if (isset($this->aLangPrefOrder['name:en'])) {
         }
 
         // Conflicts between US state abreviations and various words for 'the' in different languages
         if (isset($this->aLangPrefOrder['name:en'])) {
-            $sQuery = preg_replace('/(^|,)\s*il\s*(,|$)/', '\1illinois\2', $sQuery);
-            $sQuery = preg_replace('/(^|,)\s*al\s*(,|$)/', '\1alabama\2', $sQuery);
-            $sQuery = preg_replace('/(^|,)\s*la\s*(,|$)/', '\1louisiana\2', $sQuery);
+            $sQuery = preg_replace('/(^|,)\s*il\s*(,|$)/i', '\1illinois\2', $sQuery);
+            $sQuery = preg_replace('/(^|,)\s*al\s*(,|$)/i', '\1alabama\2', $sQuery);
+            $sQuery = preg_replace('/(^|,)\s*la\s*(,|$)/i', '\1louisiana\2', $sQuery);
         }
 
         // Do we have anything that looks like a lat/lon pair?
         $sQuery = $oCtx->setNearPointFromQuery($sQuery);
 
         }
 
         // Do we have anything that looks like a lat/lon pair?
         $sQuery = $oCtx->setNearPointFromQuery($sQuery);
 
-        $aResults = array();
         if ($sQuery || $this->aStructuredQuery) {
             // Start with a single blank search
             $aSearches = array(new SearchDescription($oCtx));
         if ($sQuery || $this->aStructuredQuery) {
             // Start with a single blank search
             $aSearches = array(new SearchDescription($oCtx));
@@ -559,6 +559,10 @@ class Geocode
                     $aSpecialTermsRaw,
                     PREG_SET_ORDER
                 );
                     $aSpecialTermsRaw,
                     PREG_SET_ORDER
                 );
+                if (!empty($aSpecialTermsRaw)) {
+                    Debug::printVar('Special terms', $aSpecialTermsRaw);
+                }
+
                 foreach ($aSpecialTermsRaw as $aSpecialTerm) {
                     $sQuery = str_replace($aSpecialTerm[0], ' ', $sQuery);
                     if (!$sSpecialTerm) {
                 foreach ($aSpecialTermsRaw as $aSpecialTerm) {
                     $sQuery = str_replace($aSpecialTerm[0], ' ', $sQuery);
                     if (!$sSpecialTerm) {
@@ -574,15 +578,17 @@ class Geocode
 
             if ($sSpecialTerm && !$aSearches[0]->hasOperator()) {
                 $sSpecialTerm = pg_escape_string($sSpecialTerm);
 
             if ($sSpecialTerm && !$aSearches[0]->hasOperator()) {
                 $sSpecialTerm = pg_escape_string($sSpecialTerm);
-                $sToken = chksql(
-                    $this->oDB->getOne("SELECT make_standard_name('$sSpecialTerm')"),
-                    "Cannot decode query. Wrong encoding?"
+                $sToken = $this->oDB->getOne(
+                    'SELECT make_standard_name(:term)',
+                    array(':term' => $sSpecialTerm),
+                    'Cannot decode query. Wrong encoding?'
                 );
                 $sSQL = 'SELECT class, type FROM word ';
                 $sSQL .= '   WHERE word_token in (\' '.$sToken.'\')';
                 $sSQL .= '   AND class is not null AND class not in (\'place\')';
                 );
                 $sSQL = 'SELECT class, type FROM word ';
                 $sSQL .= '   WHERE word_token in (\' '.$sToken.'\')';
                 $sSQL .= '   AND class is not null AND class not in (\'place\')';
-                if (CONST_Debug) var_Dump($sSQL);
-                $aSearchWords = chksql($this->oDB->getAll($sSQL));
+
+                Debug::printSQL($sSQL);
+                $aSearchWords = $this->oDB->getAll($sSQL);
                 $aNewSearches = array();
                 foreach ($aSearches as $oSearch) {
                     foreach ($aSearchWords as $aSearchTerm) {
                 $aNewSearches = array();
                 foreach ($aSearches as $oSearch) {
                     foreach ($aSearchWords as $aSearchTerm) {
@@ -608,16 +614,22 @@ class Geocode
                 $bStructuredPhrases = false;
             }
 
                 $bStructuredPhrases = false;
             }
 
+            Debug::printDebugArray('Search context', $oCtx);
+            Debug::printDebugArray('Base search', empty($aSearches) ? null : $aSearches[0]);
+            Debug::printVar('Final query phrases', $aInPhrases);
+
             // Convert each phrase to standard form
             // Create a list of standard words
             // Get all 'sets' of words
             // Generate a complete list of all
             // Convert each phrase to standard form
             // Create a list of standard words
             // Get all 'sets' of words
             // Generate a complete list of all
+            Debug::newSection('Tokenization');
             $aTokens = array();
             $aPhrases = array();
             foreach ($aInPhrases as $iPhrase => $sPhrase) {
             $aTokens = array();
             $aPhrases = array();
             foreach ($aInPhrases as $iPhrase => $sPhrase) {
-                $sPhrase = chksql(
-                    $this->oDB->getOne('SELECT make_standard_name('.getDBQuoted($sPhrase).')'),
-                    "Cannot normalize query string (is it a UTF-8 string?)"
+                $sPhrase = $this->oDB->getOne(
+                    'SELECT make_standard_name(:phrase)',
+                    array(':phrase' => $sPhrase),
+                    'Cannot normalize query string (is it a UTF-8 string?)'
                 );
                 if (trim($sPhrase)) {
                     $oPhrase = new Phrase($sPhrase, is_string($iPhrase) ? $iPhrase : '');
                 );
                 if (trim($sPhrase)) {
                     $oPhrase = new Phrase($sPhrase, is_string($iPhrase) ? $iPhrase : '');
@@ -626,74 +638,58 @@ class Geocode
                 }
             }
 
                 }
             }
 
-            if (sizeof($aTokens)) {
-                // Check which tokens we have, get the ID numbers
+            Debug::printVar('Tokens', $aTokens);
+
+            $oValidTokens = new TokenList();
+
+            if (!empty($aTokens)) {
                 $sSQL = 'SELECT word_id, word_token, word, class, type, country_code, operator, search_name_count';
                 $sSQL .= ' FROM word ';
                 $sSQL = 'SELECT word_id, word_token, word, class, type, country_code, operator, search_name_count';
                 $sSQL .= ' FROM word ';
-                $sSQL .= ' WHERE word_token in ('.join(',', array_map("getDBQuoted", $aTokens)).')';
+                $sSQL .= ' WHERE word_token in ('.join(',', $this->oDB->getDBQuotedList($aTokens)).')';
 
 
-                if (CONST_Debug) var_Dump($sSQL);
+                Debug::printSQL($sSQL);
 
 
-                $aValidTokens = array();
-                $aDatabaseWords = chksql(
-                    $this->oDB->getAll($sSQL),
-                    "Could not get word tokens."
+                $oValidTokens->addTokensFromDB(
+                    $this->oDB,
+                    $aTokens,
+                    $this->aCountryCodes,
+                    $sNormQuery,
+                    $this->oNormalizer
                 );
                 );
-                $aWordFrequencyScores = array();
-                foreach ($aDatabaseWords as $aToken) {
-                    // Filter country tokens that do not match restricted countries.
-                    if ($this->aCountryCodes
-                        && $aToken['country_code']
-                        && !in_array($aToken['country_code'], $this->aCountryCodes)
-                    ) {
-                        continue;
-                    }
-
-                    // Special terms need to appear in their normalized form.
-                    if ($aToken['word'] && $aToken['class']) {
-                        $sNormWord = $this->normTerm($aToken['word']);
-                        if (strpos($sNormQuery, $sNormWord) === false) {
-                            continue;
-                        }
-                    }
 
 
-                    if (isset($aValidTokens[$aToken['word_token']])) {
-                        $aValidTokens[$aToken['word_token']][] = $aToken;
-                    } else {
-                        $aValidTokens[$aToken['word_token']] = array($aToken);
-                    }
-                    $aWordFrequencyScores[$aToken['word_id']] = $aToken['search_name_count'] + 1;
-                }
-                if (CONST_Debug) var_Dump($aPhrases, $aValidTokens);
-
-                // US ZIP+4 codes - if there is no token, merge in the 5-digit ZIP code
+                // Try more interpretations for Tokens that could not be matched.
                 foreach ($aTokens as $sToken) {
                 foreach ($aTokens as $sToken) {
-                    if (!isset($aValidTokens[$sToken]) && preg_match('/^([0-9]{5}) [0-9]{4}$/', $sToken, $aData)) {
-                        if (isset($aValidTokens[$aData[1]])) {
-                            foreach ($aValidTokens[$aData[1]] as $aToken) {
-                                if (!$aToken['class']) {
-                                    if (isset($aValidTokens[$sToken])) {
-                                        $aValidTokens[$sToken][] = $aToken;
-                                    } else {
-                                        $aValidTokens[$sToken] = array($aToken);
-                                    }
-                                }
-                            }
+                    if ($sToken[0] == ' ' && !$oValidTokens->contains($sToken)) {
+                        if (preg_match('/^ ([0-9]{5}) [0-9]{4}$/', $sToken, $aData)) {
+                            // US ZIP+4 codes - merge in the 5-digit ZIP code
+                            $oValidTokens->addToken(
+                                $sToken,
+                                new Token\Postcode(null, $aData[1], 'us')
+                            );
+                        } elseif (preg_match('/^ [0-9]+$/', $sToken)) {
+                            // Unknown single word token with a number.
+                            // Assume it is a house number.
+                            $oValidTokens->addToken(
+                                $sToken,
+                                new Token\HouseNumber(null, trim($sToken))
+                            );
                         }
                     }
                 }
 
                         }
                     }
                 }
 
-                foreach ($aTokens as $sToken) {
-                    // Unknown single word token with a number - assume it is a house number
-                    if (!isset($aValidTokens[' '.$sToken]) && strpos($sToken, ' ') === false && preg_match('/^[0-9]+$/', $sToken)) {
-                        $aValidTokens[' '.$sToken] = array(array('class' => 'place', 'type' => 'house', 'word_token' => ' '.$sToken));
-                    }
-                }
-
                 // Any words that have failed completely?
                 // TODO: suggestions
 
                 // Any words that have failed completely?
                 // TODO: suggestions
 
-                $aGroupedSearches = $this->getGroupedSearches($aSearches, $aPhrases, $aValidTokens, $bStructuredPhrases);
+                Debug::printGroupTable('Valid Tokens', $oValidTokens->debugInfo());
+
+                foreach ($aPhrases as $oPhrase) {
+                    $oPhrase->computeWordSets($oValidTokens);
+                }
+                Debug::printDebugTable('Phrases', $aPhrases);
+
+                Debug::newSection('Search candidates');
+
+                $aGroupedSearches = $this->getGroupedSearches($aSearches, $aPhrases, $oValidTokens, $bStructuredPhrases);
 
                 if ($this->bReverseInPlan) {
                     // Reverse phrase array and also reverse the order of the wordsets in
 
                 if ($this->bReverseInPlan) {
                     // Reverse phrase array and also reverse the order of the wordsets in
@@ -701,10 +697,10 @@ class Geocode
                     // because order in the address doesn't matter.
                     $aPhrases = array_reverse($aPhrases);
                     $aPhrases[0]->invertWordSets();
                     // because order in the address doesn't matter.
                     $aPhrases = array_reverse($aPhrases);
                     $aPhrases[0]->invertWordSets();
-                    if (sizeof($aPhrases) > 1) {
-                        $aPhrases[sizeof($aPhrases)-1]->invertWordSets();
+                    if (count($aPhrases) > 1) {
+                        $aPhrases[count($aPhrases)-1]->invertWordSets();
                     }
                     }
-                    $aReverseGroupedSearches = $this->getGroupedSearches($aSearches, $aPhrases, $aValidTokens, false);
+                    $aReverseGroupedSearches = $this->getGroupedSearches($aSearches, $aPhrases, $oValidTokens, false);
 
                     foreach ($aGroupedSearches as $aSearches) {
                         foreach ($aSearches as $aSearch) {
 
                     foreach ($aGroupedSearches as $aSearches) {
                         foreach ($aSearches as $aSearch) {
@@ -737,40 +733,71 @@ class Geocode
                     $sHash = serialize($aSearch);
                     if (isset($aSearchHash[$sHash])) {
                         unset($aGroupedSearches[$iGroup][$iSearch]);
                     $sHash = serialize($aSearch);
                     if (isset($aSearchHash[$sHash])) {
                         unset($aGroupedSearches[$iGroup][$iSearch]);
-                        if (sizeof($aGroupedSearches[$iGroup]) == 0) unset($aGroupedSearches[$iGroup]);
+                        if (empty($aGroupedSearches[$iGroup])) unset($aGroupedSearches[$iGroup]);
                     } else {
                         $aSearchHash[$sHash] = 1;
                     }
                 }
             }
 
                     } else {
                         $aSearchHash[$sHash] = 1;
                     }
                 }
             }
 
-            if (CONST_Debug) _debugDumpGroupedSearches($aGroupedSearches, $aValidTokens);
+            Debug::printGroupedSearch(
+                $aGroupedSearches,
+                $oValidTokens->debugTokenByWordIdList()
+            );
 
             // Start the search process
             $iGroupLoop = 0;
             $iQueryLoop = 0;
 
             // Start the search process
             $iGroupLoop = 0;
             $iQueryLoop = 0;
+            $aNextResults = array();
             foreach ($aGroupedSearches as $iGroupedRank => $aSearches) {
                 $iGroupLoop++;
             foreach ($aGroupedSearches as $iGroupedRank => $aSearches) {
                 $iGroupLoop++;
+                $aResults = $aNextResults;
                 foreach ($aSearches as $oSearch) {
                     $iQueryLoop++;
 
                 foreach ($aSearches as $oSearch) {
                     $iQueryLoop++;
 
-                    if (CONST_Debug) {
-                        echo "<hr><b>Search Loop, group $iGroupLoop, loop $iQueryLoop</b>";
-                        _debugDumpGroupedSearches(array($iGroupedRank => array($oSearch)), $aValidTokens);
-                    }
+                    Debug::newSection("Search Loop, group $iGroupLoop, loop $iQueryLoop");
+                    Debug::printGroupedSearch(
+                        array($iGroupedRank => array($oSearch)),
+                        $oValidTokens->debugTokenByWordIdList()
+                    );
 
 
-                    $aResults += $oSearch->query(
+                    $aNewResults = $oSearch->query(
                         $this->oDB,
                         $this->oDB,
-                        $aWordFrequencyScores,
                         $this->iMinAddressRank,
                         $this->iMaxAddressRank,
                         $this->iLimit
                     );
 
                         $this->iMinAddressRank,
                         $this->iMaxAddressRank,
                         $this->iLimit
                     );
 
+                    // The same result may appear in different rounds, only
+                    // use the one with minimal rank.
+                    foreach ($aNewResults as $iPlace => $oRes) {
+                        if (!isset($aResults[$iPlace])
+                            || $aResults[$iPlace]->iResultRank > $oRes->iResultRank) {
+                            $aResults[$iPlace] = $oRes;
+                        }
+                    }
+
                     if ($iQueryLoop > 20) break;
                 }
 
                     if ($iQueryLoop > 20) break;
                 }
 
-                if (sizeof($aResults) && ($this->iMinAddressRank != 0 || $this->iMaxAddressRank != 30)) {
+                if (!empty($aResults)) {
+                    $aSplitResults = Result::splitResults($aResults);
+                    Debug::printVar('Split results', $aSplitResults);
+                    if ($iGroupLoop <= 4 && empty($aSplitResults['tail'])
+                        && reset($aSplitResults['head'])->iResultRank > 0) {
+                        // Haven't found an exact match for the query yet.
+                        // Therefore add result from the next group level.
+                        $aNextResults = $aSplitResults['head'];
+                        foreach ($aNextResults as $oRes) {
+                            $oRes->iResultRank--;
+                        }
+                        $aResults = array();
+                    } else {
+                        $aResults = $aSplitResults['head'];
+                    }
+                }
+
+                if (!empty($aResults) && ($this->iMinAddressRank != 0 || $this->iMaxAddressRank != 30)) {
                     // Need to verify passes rank limits before dropping out of the loop (yuk!)
                     // reduces the number of place ids, like a filter
                     // rank_address is 30 for interpolated housenumbers
                     // Need to verify passes rank limits before dropping out of the loop (yuk!)
                     // reduces the number of place ids, like a filter
                     // rank_address is 30 for interpolated housenumbers
@@ -779,15 +806,15 @@ class Geocode
                     if ($sPlaceIds) {
                         $sSQL = 'SELECT place_id FROM placex ';
                         $sSQL .= 'WHERE place_id in ('.$sPlaceIds.') ';
                     if ($sPlaceIds) {
                         $sSQL = 'SELECT place_id FROM placex ';
                         $sSQL .= 'WHERE place_id in ('.$sPlaceIds.') ';
-                        $sSQL .= "  AND (";
+                        $sSQL .= '  AND (';
                         $sSQL .= "         placex.rank_address between $this->iMinAddressRank and $this->iMaxAddressRank ";
                         if (14 >= $this->iMinAddressRank && 14 <= $this->iMaxAddressRank) {
                             $sSQL .= "     OR (extratags->'place') = 'city'";
                         }
                         if ($this->aAddressRankList) {
                         $sSQL .= "         placex.rank_address between $this->iMinAddressRank and $this->iMaxAddressRank ";
                         if (14 >= $this->iMinAddressRank && 14 <= $this->iMaxAddressRank) {
                             $sSQL .= "     OR (extratags->'place') = 'city'";
                         }
                         if ($this->aAddressRankList) {
-                            $sSQL .= "     OR placex.rank_address in (".join(',', $this->aAddressRankList).")";
+                            $sSQL .= '     OR placex.rank_address in ('.join(',', $this->aAddressRankList).')';
                         }
                         }
-                        $sSQL .= ")";
+                        $sSQL .= ')';
                         $aFilterSql[] = $sSQL;
                     }
                     $sPlaceIds = Result::joinIdsByTable($aResults, Result::TABLE_POSTCODE);
                         $aFilterSql[] = $sSQL;
                     }
                     $sPlaceIds = Result::joinIdsByTable($aResults, Result::TABLE_POSTCODE);
@@ -796,17 +823,17 @@ class Geocode
                         $sSQL .= 'WHERE place_id in ('.$sPlaceIds.') ';
                         $sSQL .= "  AND (lp.rank_address between $this->iMinAddressRank and $this->iMaxAddressRank ";
                         if ($this->aAddressRankList) {
                         $sSQL .= 'WHERE place_id in ('.$sPlaceIds.') ';
                         $sSQL .= "  AND (lp.rank_address between $this->iMinAddressRank and $this->iMaxAddressRank ";
                         if ($this->aAddressRankList) {
-                            $sSQL .= "     OR lp.rank_address in (".join(',', $this->aAddressRankList).")";
+                            $sSQL .= '     OR lp.rank_address in ('.join(',', $this->aAddressRankList).')';
                         }
                         }
-                        $sSQL .= ") ";
+                        $sSQL .= ') ';
                         $aFilterSql[] = $sSQL;
                     }
 
                     $aFilteredIDs = array();
                     if ($aFilterSql) {
                         $sSQL = join(' UNION ', $aFilterSql);
                         $aFilterSql[] = $sSQL;
                     }
 
                     $aFilteredIDs = array();
                     if ($aFilterSql) {
                         $sSQL = join(' UNION ', $aFilterSql);
-                        if (CONST_Debug) var_dump($sSQL);
-                        $aFilteredIDs = chksql($this->oDB->getCol($sSQL));
+                        Debug::printSQL($sSQL);
+                        $aFilteredIDs = $this->oDB->getCol($sSQL);
                     }
 
                     $tempIDs = array();
                     }
 
                     $tempIDs = array();
@@ -823,7 +850,7 @@ class Geocode
                     $aResults = $tempIDs;
                 }
 
                     $aResults = $tempIDs;
                 }
 
-                if (sizeof($aResults)) break;
+                if (!empty($aResults)) break;
                 if ($iGroupLoop > 4) break;
                 if ($iQueryLoop > 30) break;
             }
                 if ($iGroupLoop > 4) break;
                 if ($iQueryLoop > 30) break;
             }
@@ -834,7 +861,7 @@ class Geocode
 
             $oLookup = $oReverse->lookupPoint($oCtx->sqlNear, false);
 
 
             $oLookup = $oReverse->lookupPoint($oCtx->sqlNear, false);
 
-            if (CONST_Debug) var_dump("Reverse search", $aLookup);
+            Debug::printVar('Reverse search', $oLookup);
 
             if ($oLookup) {
                 $aResults = array($oLookup->iId => $oLookup);
 
             if ($oLookup) {
                 $aResults = array($oLookup->iId => $oLookup);
@@ -842,7 +869,7 @@ class Geocode
         }
 
         // No results? Done
         }
 
         // No results? Done
-        if (!sizeof($aResults)) {
+        if (empty($aResults)) {
             if ($this->bFallback) {
                 if ($this->fallbackStructuredQuery()) {
                     return $this->lookup();
             if ($this->bFallback) {
                 if ($this->fallbackStructuredQuery()) {
                     return $this->lookup();
@@ -863,20 +890,17 @@ class Geocode
 
         $aSearchResults = $this->oPlaceLookup->lookup($aResults);
 
 
         $aSearchResults = $this->oPlaceLookup->lookup($aResults);
 
-        $aClassType = getClassTypesWithImportance();
+        $aClassType = ClassTypes\getListWithImportance();
         $aRecheckWords = preg_split('/\b[\s,\\-]*/u', $sQuery);
         foreach ($aRecheckWords as $i => $sWord) {
             if (!preg_match('/[\pL\pN]/', $sWord)) unset($aRecheckWords[$i]);
         }
 
         $aRecheckWords = preg_split('/\b[\s,\\-]*/u', $sQuery);
         foreach ($aRecheckWords as $i => $sWord) {
             if (!preg_match('/[\pL\pN]/', $sWord)) unset($aRecheckWords[$i]);
         }
 
-        if (CONST_Debug) {
-            echo '<i>Recheck words:<\i>';
-            var_dump($aRecheckWords);
-        }
+        Debug::printVar('Recheck words', $aRecheckWords);
 
         foreach ($aSearchResults as $iIdx => $aResult) {
             // Default
 
         foreach ($aSearchResults as $iIdx => $aResult) {
             // Default
-            $fDiameter = getResultDiameter($aResult);
+            $fDiameter = ClassTypes\getProperty($aResult, 'defdiameter', 0.0001);
 
             $aOutlineResult = $this->oPlaceLookup->getOutlines($aResult['place_id'], $aResult['lon'], $aResult['lat'], $fDiameter/2);
             if ($aOutlineResult) {
 
             $aOutlineResult = $this->oPlaceLookup->getOutlines($aResult['place_id'], $aResult['lon'], $aResult['lat'], $fDiameter/2);
             if ($aOutlineResult) {
@@ -890,27 +914,15 @@ class Geocode
             }
 
             // Is there an icon set for this type of result?
             }
 
             // Is there an icon set for this type of result?
-            if (isset($aClassType[$aResult['class'].':'.$aResult['type']]['icon'])
-                && $aClassType[$aResult['class'].':'.$aResult['type']]['icon']
-            ) {
-                $aResult['icon'] = CONST_Website_BaseURL.'images/mapicons/'.$aClassType[$aResult['class'].':'.$aResult['type']]['icon'].'.p.20.png';
-            }
+            $aClassInfo = ClassTypes\getInfo($aResult);
 
 
-            if (isset($aClassType[$aResult['class'].':'.$aResult['type'].':'.$aResult['admin_level']]['label'])
-                && $aClassType[$aResult['class'].':'.$aResult['type'].':'.$aResult['admin_level']]['label']
-            ) {
-                $aResult['label'] = $aClassType[$aResult['class'].':'.$aResult['type'].':'.$aResult['admin_level']]['label'];
-            } elseif (isset($aClassType[$aResult['class'].':'.$aResult['type']]['label'])
-                && $aClassType[$aResult['class'].':'.$aResult['type']]['label']
-            ) {
-                $aResult['label'] = $aClassType[$aResult['class'].':'.$aResult['type']]['label'];
-            }
-            // if tag '&addressdetails=1' is set in query
-            if ($this->bIncludeAddressDetails) {
-                // getAddressDetails() is defined in lib.php and uses the SQL function get_addressdata in functions.sql
-                $aResult['address'] = getAddressDetails($this->oDB, $sLanguagePrefArraySQL, $aResult['place_id'], $aResult['country_code'], $aResults[$aResult['place_id']]->iHouseNumber);
-                if ($aResult['extra_place'] == 'city' && !isset($aResult['address']['city'])) {
-                    $aResult['address'] = array_merge(array('city' => array_values($aResult['address'])[0]), $aResult['address']);
+            if ($aClassInfo) {
+                if (isset($aClassInfo['icon'])) {
+                    $aResult['icon'] = CONST_Website_BaseURL.'images/mapicons/'.$aClassInfo['icon'].'.p.20.png';
+                }
+
+                if (isset($aClassInfo['label'])) {
+                    $aResult['label'] = $aClassInfo['label'];
                 }
             }
 
                 }
             }
 
@@ -920,18 +932,18 @@ class Geocode
                 $aResult['importance'] = 0.001;
                 $aResult['foundorder'] = $aResult['addressimportance'];
             } else {
                 $aResult['importance'] = 0.001;
                 $aResult['foundorder'] = $aResult['addressimportance'];
             } else {
-                // Adjust importance for the number of exact string matches in the result
+                $aResult['importance'] = max(0.001, $aResult['importance']);
                 $aResult['importance'] *= $this->viewboxImportanceFactor(
                     $aResult['lon'],
                     $aResult['lat']
                 );
                 $aResult['importance'] *= $this->viewboxImportanceFactor(
                     $aResult['lon'],
                     $aResult['lat']
                 );
-                $aResult['importance'] = max(0.001, $aResult['importance']);
+                // Adjust importance for the number of exact string matches in the result
                 $iCountWords = 0;
                 $sAddress = $aResult['langaddress'];
                 foreach ($aRecheckWords as $i => $sWord) {
                     if (stripos($sAddress, $sWord)!==false) {
                         $iCountWords++;
                 $iCountWords = 0;
                 $sAddress = $aResult['langaddress'];
                 foreach ($aRecheckWords as $i => $sWord) {
                     if (stripos($sAddress, $sWord)!==false) {
                         $iCountWords++;
-                        if (preg_match("/(^|,)\s*".preg_quote($sWord, '/')."\s*(,|$)/", $sAddress)) $iCountWords += 0.1;
+                        if (preg_match('/(^|,)\s*'.preg_quote($sWord, '/').'\s*(,|$)/', $sAddress)) $iCountWords += 0.1;
                     }
                 }
 
                     }
                 }
 
@@ -951,18 +963,16 @@ class Geocode
                     $aResult['foundorder'] += 0.01;
                 }
             }
                     $aResult['foundorder'] += 0.01;
                 }
             }
-            if (CONST_Debug) var_dump($aResult);
             $aSearchResults[$iIdx] = $aResult;
         }
         uasort($aSearchResults, 'byImportance');
             $aSearchResults[$iIdx] = $aResult;
         }
         uasort($aSearchResults, 'byImportance');
+        Debug::printVar('Pre-filter results', $aSearchResults);
 
         $aOSMIDDone = array();
         $aClassTypeNameDone = array();
         $aToFilter = $aSearchResults;
         $aSearchResults = array();
 
 
         $aOSMIDDone = array();
         $aClassTypeNameDone = array();
         $aToFilter = $aSearchResults;
         $aSearchResults = array();
 
-        if (CONST_Debug) var_dump($aToFilter);
-
         $bFirst = true;
         foreach ($aToFilter as $aResult) {
             $this->aExcludePlaceIDs[$aResult['place_id']] = $aResult['place_id'];
         $bFirst = true;
         foreach ($aToFilter as $aResult) {
             $this->aExcludePlaceIDs[$aResult['place_id']] = $aResult['place_id'];
@@ -981,10 +991,32 @@ class Geocode
             }
 
             // Absolute limit on number of results
             }
 
             // Absolute limit on number of results
-            if (sizeof($aSearchResults) >= $this->iFinalLimit) break;
+            if (count($aSearchResults) >= $this->iFinalLimit) break;
         }
 
         }
 
-        if (CONST_Debug) var_dump($aSearchResults);
+        Debug::printVar('Post-filter results', $aSearchResults);
         return $aSearchResults;
     } // end lookup()
         return $aSearchResults;
     } // end lookup()
+
+    public function debugInfo()
+    {
+        return array(
+                'Query' => $this->sQuery,
+                'Structured query' => $this->aStructuredQuery,
+                'Name keys' => Debug::fmtArrayVals($this->aLangPrefOrder),
+                'Excluded place IDs' => Debug::fmtArrayVals($this->aExcludePlaceIDs),
+                'Try reversed query'=> $this->bReverseInPlan,
+                'Limit (for searches)' => $this->iLimit,
+                'Limit (for results)'=> $this->iFinalLimit,
+                'Country codes' => Debug::fmtArrayVals($this->aCountryCodes),
+                'Bounded search' => $this->bBoundedSearch,
+                'Viewbox' => Debug::fmtArrayVals($this->aViewBox),
+                'Route points' => Debug::fmtArrayVals($this->aRoutePoints),
+                'Route width' => $this->aRouteWidth,
+                'Max rank' => $this->iMaxRank,
+                'Min address rank' => $this->iMinAddressRank,
+                'Max address rank' => $this->iMaxAddressRank,
+                'Address rank list' => Debug::fmtArrayVals($this->aAddressRankList)
+               );
+    }
 } // end class
 } // end class
Open Source search based on OpenStreetMap data