Merge remote-tracking branch 'upstream/master'

[nominatim.git] / utils / update.php

diff --git a/utils/update.php b/utils/update.php
index 84fb24e5ed8a1c6acc977361a0b431c85305d620..d4dc60c5278622713df2439643142197afc966f1 100755 (executable)
--- a/utils/update.php
+++ b/utils/update.php
@@ -5,37 +5,40 @@ require_once(dirname(dirname(__FILE__)).'/settings/settings.php');
 require_once(CONST_BasePath.'/lib/init-cmd.php');
 ini_set('memory_limit', '800M');
 
 require_once(CONST_BasePath.'/lib/init-cmd.php');
 ini_set('memory_limit', '800M');
 

-$aCMDOptions = array(
-    "Import / update / index osm data",
-    array('help', 'h', 0, 1, 0, 0, false, 'Show Help'),
-    array('quiet', 'q', 0, 1, 0, 0, 'bool', 'Quiet output'),
-    array('verbose', 'v', 0, 1, 0, 0, 'bool', 'Verbose output'),
-
-    array('import-osmosis', '', 0, 1, 0, 0, 'bool', 'Import using osmosis'),
-    array('import-osmosis-all', '', 0, 1, 0, 0, 'bool', 'Import using osmosis forever'),
-    array('no-npi', '', 0, 1, 0, 0, 'bool', '(obsolate)'),
-    array('no-index', '', 0, 1, 0, 0, 'bool', 'Do not index the new data'),
-
-    array('import-all', '', 0, 1, 0, 0, 'bool', 'Import all available files'),
-
-    array('import-file', '', 0, 1, 1, 1, 'realpath', 'Re-import data from an OSM file'),
-    array('import-diff', '', 0, 1, 1, 1, 'realpath', 'Import a diff (osc) file from local file system'),
-    array('osm2pgsql-cache', '', 0, 1, 1, 1, 'int', 'Cache size used by osm2pgsql'),
-
-    array('import-node', '', 0, 1, 1, 1, 'int', 'Re-import node'),
-    array('import-way', '', 0, 1, 1, 1, 'int', 'Re-import way'),
-    array('import-relation', '', 0, 1, 1, 1, 'int', 'Re-import relation'),
-    array('import-from-main-api', '', 0, 1, 0, 0, 'bool', 'Use OSM API instead of Overpass to download objects'),
-
-    array('index', '', 0, 1, 0, 0, 'bool', 'Index'),
-    array('index-rank', '', 0, 1, 1, 1, 'int', 'Rank to start indexing from'),
-    array('index-instances', '', 0, 1, 1, 1, 'int', 'Number of indexing instances (threads)'),
-
-    array('deduplicate', '', 0, 1, 0, 0, 'bool', 'Deduplicate tokens'),
-);
+$aCMDOptions
+= array(
+   "Import / update / index osm data",
+   array('help', 'h', 0, 1, 0, 0, false, 'Show Help'),
+   array('quiet', 'q', 0, 1, 0, 0, 'bool', 'Quiet output'),
+   array('verbose', 'v', 0, 1, 0, 0, 'bool', 'Verbose output'),
+
+   array('init-updates', '', 0, 1, 0, 0, 'bool', 'Set up database for updating'),
+   array('import-osmosis', '', 0, 1, 0, 0, 'bool', 'Import updates once'),
+   array('import-osmosis-all', '', 0, 1, 0, 0, 'bool', 'Import updates forever'),
+   array('no-npi', '', 0, 1, 0, 0, 'bool', '(obsolate)'),
+   array('no-index', '', 0, 1, 0, 0, 'bool', 'Do not index the new data'),
+
+   array('import-all', '', 0, 1, 0, 0, 'bool', 'Import all available files'),
+
+   array('import-file', '', 0, 1, 1, 1, 'realpath', 'Re-import data from an OSM file'),
+   array('import-diff', '', 0, 1, 1, 1, 'realpath', 'Import a diff (osc) file from local file system'),
+   array('osm2pgsql-cache', '', 0, 1, 1, 1, 'int', 'Cache size used by osm2pgsql'),
+
+   array('import-node', '', 0, 1, 1, 1, 'int', 'Re-import node'),
+   array('import-way', '', 0, 1, 1, 1, 'int', 'Re-import way'),
+   array('import-relation', '', 0, 1, 1, 1, 'int', 'Re-import relation'),
+   array('import-from-main-api', '', 0, 1, 0, 0, 'bool', 'Use OSM API instead of Overpass to download objects'),
+
+   array('index', '', 0, 1, 0, 0, 'bool', 'Index'),
+   array('index-rank', '', 0, 1, 1, 1, 'int', 'Rank to start indexing from'),
+   array('index-instances', '', 0, 1, 1, 1, 'int', 'Number of indexing instances (threads)'),
+
+   array('deduplicate', '', 0, 1, 0, 0, 'bool', 'Deduplicate tokens'),
+  );

 getCmdOpt($_SERVER['argv'], $aCMDOptions, $aResult, true, true);
 
 if (!isset($aResult['index-instances'])) $aResult['index-instances'] = 1;
 getCmdOpt($_SERVER['argv'], $aCMDOptions, $aResult, true, true);
 
 if (!isset($aResult['index-instances'])) $aResult['index-instances'] = 1;

+

 if (!isset($aResult['index-rank'])) $aResult['index-rank'] = 0;
 
 date_default_timezone_set('Etc/UTC');
 if (!isset($aResult['index-rank'])) $aResult['index-rank'] = 0;
 
 date_default_timezone_set('Etc/UTC');


@@ -47,24 +50,59 @@ if (!isset($aDSNInfo['port']) || !$aDSNInfo['port']) $aDSNInfo['port'] = 5432;
 
 // cache memory to be used by osm2pgsql, should not be more than the available memory
 $iCacheMemory = (isset($aResult['osm2pgsql-cache'])?$aResult['osm2pgsql-cache']:2000);
 
 // cache memory to be used by osm2pgsql, should not be more than the available memory
 $iCacheMemory = (isset($aResult['osm2pgsql-cache'])?$aResult['osm2pgsql-cache']:2000);

-if ($iCacheMemory + 500 > getTotalMemoryMB())
-{
+if ($iCacheMemory + 500 > getTotalMemoryMB()) {

     $iCacheMemory = getCacheMemoryMB();
     echo "WARNING: resetting cache memory to $iCacheMemory\n";
 }
 $sOsm2pgsqlCmd = CONST_Osm2pgsql_Binary.' -klas --number-processes 1 -C '.$iCacheMemory.' -O gazetteer -d '.$aDSNInfo['database'].' -P '.$aDSNInfo['port'];
     $iCacheMemory = getCacheMemoryMB();
     echo "WARNING: resetting cache memory to $iCacheMemory\n";
 }
 $sOsm2pgsqlCmd = CONST_Osm2pgsql_Binary.' -klas --number-processes 1 -C '.$iCacheMemory.' -O gazetteer -d '.$aDSNInfo['database'].' -P '.$aDSNInfo['port'];

-if (!is_null(CONST_Osm2pgsql_Flatnode_File))
-{
+if (!is_null(CONST_Osm2pgsql_Flatnode_File)) {

     $sOsm2pgsqlCmd .= ' --flat-nodes '.CONST_Osm2pgsql_Flatnode_File;
 }
 
     $sOsm2pgsqlCmd .= ' --flat-nodes '.CONST_Osm2pgsql_Flatnode_File;
 }
 

+if ($aResult['init-updates']) {
+    // sanity check that the replication URL is correct
+    $sBaseState = file_get_contents(CONST_Replication_Url.'/state.txt');
+    if ($sBaseState === false) {
+        echo "\nCannot find state.txt file at the configured replication URL.\n";
+        echo "Does the URL point to a directory containing OSM update data?\n\n";
+        fail("replication URL not reachable.");
+    }
+    $sSetup = CONST_InstallPath.'/utils/setup.php';
+    $iRet = -1;
+    passthru($sSetup.' --create-functions --enable-diff-updates', $iRet);
+    if ($iRet != 0) {
+        fail('Error running setup script');
+    }
+
+    $sDatabaseDate = getDatabaseDate($oDB);
+    if ($sDatabaseDate === false) {
+        fail("Cannot determine date of database.");
+    }
+    $sWindBack = strftime('%Y-%m-%dT%H:%M:%SZ',
+                          strtotime($sDatabaseDate) - (3*60*60));
+
+    // get the appropriate state id
+    $aOutput = 0;
+    $sCmd = CONST_Pyosmium_Binary.' -D '.$sWindBack.' --server '.CONST_Replication_Url;
+    exec($sCmd, $aOutput, $iRet);
+    if ($iRet != 0 || $aOutput[0] == 'None') {
+        fail('Error running pyosmium tools');
+    }
+
+    pg_query($oDB->connection, 'TRUNCATE import_status');
+    $sSQL = "INSERT INTO import_status (lastimportdate, sequence_id, indexed) VALUES('";
+    $sSQL .= $sDatabaseDate."',".$aOutput[0].", true)";
+    if (!pg_query($oDB->connection, $sSQL)) {
+        fail("Could not enter sequence into database.");
+    }
+
+    echo "Done. Database updates will start at sequence $aOutput[0] ($sWindBack)\n";
+}

 
 

-if (isset($aResult['import-diff']))
-{
-    // import diff directly (e.g. from osmosis --rri)
-    $sNextFile = $aResult['import-diff'];
-    if (!file_exists($sNextFile))
-    {
+if (isset($aResult['import-diff']) || isset($aResult['import-file'])) {
+    // import diffs and files directly (e.g. from osmosis --rri)
+    $sNextFile = isset($aResult['import-diff']) ? $aResult['import-diff'] : $aResult['import-file'];
+    if (!file_exists($sNextFile)) {

         fail("Cannot open $sNextFile\n");
     }
 
         fail("Cannot open $sNextFile\n");
     }
 


@@ -73,8 +111,7 @@ if (isset($aResult['import-diff']))
     echo $sCMD."\n";
     exec($sCMD, $sJunk, $iErrorLevel);
 
     echo $sCMD."\n";
     exec($sCMD, $sJunk, $iErrorLevel);
 

-    if ($iErrorLevel)
-    {
+    if ($iErrorLevel) {

         fail("Error from osm2pgsql, $iErrorLevel\n");
     }
 
         fail("Error from osm2pgsql, $iErrorLevel\n");
     }
 


@@ -83,125 +120,84 @@ if (isset($aResult['import-diff']))
 
 $sTemporaryFile = CONST_BasePath.'/data/osmosischange.osc';
 $bHaveDiff = false;
 
 $sTemporaryFile = CONST_BasePath.'/data/osmosischange.osc';
 $bHaveDiff = false;

-if (isset($aResult['import-file']) && $aResult['import-file'])
-{
-    $bHaveDiff = true;
-    $sCMD = CONST_Osmosis_Binary.' --read-xml \''.$aResult['import-file'].'\' --read-empty --derive-change --write-xml-change '.$sTemporaryFile;
-    echo $sCMD."\n";
-    exec($sCMD, $sJunk, $iErrorLevel);
-    if ($iErrorLevel)
-    {
-        fail("Error converting osm to osc, osmosis returned: $iErrorLevel\n");
-    }
-}
-

 $bUseOSMApi = isset($aResult['import-from-main-api']) && $aResult['import-from-main-api'];
 $sContentURL = '';
 $bUseOSMApi = isset($aResult['import-from-main-api']) && $aResult['import-from-main-api'];
 $sContentURL = '';

-if (isset($aResult['import-node']) && $aResult['import-node'])
-{
-    if ($bUseOSMApi)
-    {
+if (isset($aResult['import-node']) && $aResult['import-node']) {
+    if ($bUseOSMApi) {

         $sContentURL = 'http://www.openstreetmap.org/api/0.6/node/'.$aResult['import-node'];
         $sContentURL = 'http://www.openstreetmap.org/api/0.6/node/'.$aResult['import-node'];

-    }
-    else
-    {
+    } else {

         $sContentURL = 'http://overpass-api.de/api/interpreter?data=node('.$aResult['import-node'].');out%20meta;';
     }
 }
         $sContentURL = 'http://overpass-api.de/api/interpreter?data=node('.$aResult['import-node'].');out%20meta;';
     }
 }

-if (isset($aResult['import-way']) && $aResult['import-way'])
-{
-    if ($bUseOSMApi)
-    {
+
+if (isset($aResult['import-way']) && $aResult['import-way']) {
+    if ($bUseOSMApi) {

         $sContentURL = 'http://www.openstreetmap.org/api/0.6/way/'.$aResult['import-way'].'/full';
         $sContentURL = 'http://www.openstreetmap.org/api/0.6/way/'.$aResult['import-way'].'/full';

-    }
-    else
-    {
+    } else {

         $sContentURL = 'http://overpass-api.de/api/interpreter?data=(way('.$aResult['import-way'].');node(w););out%20meta;';
     }
 }
         $sContentURL = 'http://overpass-api.de/api/interpreter?data=(way('.$aResult['import-way'].');node(w););out%20meta;';
     }
 }

-if (isset($aResult['import-relation']) && $aResult['import-relation'])
-{
-    if ($bUseOSMApi)
-    {
+
+if (isset($aResult['import-relation']) && $aResult['import-relation']) {
+    if ($bUseOSMApi) {

         $sContentURLsModifyXMLstr = 'http://www.openstreetmap.org/api/0.6/relation/'.$aResult['import-relation'].'/full';
         $sContentURLsModifyXMLstr = 'http://www.openstreetmap.org/api/0.6/relation/'.$aResult['import-relation'].'/full';

-    }
-    else
-    {
+    } else {

         $sContentURL = 'http://overpass-api.de/api/interpreter?data=((rel('.$aResult['import-relation'].');way(r);node(w));node(r));out%20meta;';
     }
 }
         $sContentURL = 'http://overpass-api.de/api/interpreter?data=((rel('.$aResult['import-relation'].');way(r);node(w));node(r));out%20meta;';
     }
 }

-if ($sContentURL)
-{
-    $sModifyXMLstr = file_get_contents($sContentURL);
-    $bHaveDiff = true;

 
 

-    $aSpec = array(
-        0 => array("pipe", "r"),  // stdin
-        1 => array("pipe", "w"),  // stdout
-        2 => array("pipe", "w") // stderr
-    );
-    $sCMD = CONST_Osmosis_Binary.' --read-xml - --read-empty --derive-change --write-xml-change '.$sTemporaryFile;
-    echo $sCMD."\n";
-    $hProc = proc_open($sCMD, $aSpec, $aPipes);
-    if (!is_resource($hProc))
-    {
-        fail("Error converting osm to osc, osmosis failed\n");
-    }
-    fwrite($aPipes[0], $sModifyXMLstr);
-    fclose($aPipes[0]);
-    $sOut = stream_get_contents($aPipes[1]);
-    if ($aResult['verbose']) echo $sOut;
-    fclose($aPipes[1]);
-    $sErrors = stream_get_contents($aPipes[2]);
-    if ($aResult['verbose']) echo $sErrors;
-    fclose($aPipes[2]);
-    if ($iError = proc_close($hProc))
-    {
-        echo $sOut;
-        echo $sErrors;
-        fail("Error converting osm to osc, osmosis returned: $iError\n");
-    }
+if ($sContentURL) {
+    file_put_contents($sTemporaryFile, file_get_contents($sContentURL));
+    $bHaveDiff = true;

 }
 
 }
 

-if ($bHaveDiff)
-{
+if ($bHaveDiff) {

     // import generated change file
     $sCMD = $sOsm2pgsqlCmd.' '.$sTemporaryFile;
     echo $sCMD."\n";
     exec($sCMD, $sJunk, $iErrorLevel);
     // import generated change file
     $sCMD = $sOsm2pgsqlCmd.' '.$sTemporaryFile;
     echo $sCMD."\n";
     exec($sCMD, $sJunk, $iErrorLevel);

-    if ($iErrorLevel)
-    {
+    if ($iErrorLevel) {

         fail("osm2pgsql exited with error level $iErrorLevel\n");
     }
 }
 
         fail("osm2pgsql exited with error level $iErrorLevel\n");
     }
 }
 

-if ($aResult['deduplicate'])
-{
+if ($aResult['deduplicate']) {
+    $oDB =& getDB();

 
 

-    if (getPostgresVersion() < 9.3)
-    {
+    if (getPostgresVersion($oDB) < 9.3) {

         fail("ERROR: deduplicate is only currently supported in postgresql 9.3");
     }
 
         fail("ERROR: deduplicate is only currently supported in postgresql 9.3");
     }
 

-    $oDB =& getDB();

     $sSQL = 'select partition from country_name order by country_code';
     $aPartitions = chksql($oDB->getCol($sSQL));
     $aPartitions[] = 0;
 
     $sSQL = 'select partition from country_name order by country_code';
     $aPartitions = chksql($oDB->getCol($sSQL));
     $aPartitions[] = 0;
 

-    $sSQL = "select word_token,count(*) from word where substr(word_token, 1, 1) = ' ' and class is null and type is null and country_code is null group by word_token having count(*) > 1 order by word_token";
+    // we don't care about empty search_name_* partitions, they can't contain mentions of duplicates
+    foreach ($aPartitions as $i => $sPartition) {
+        $sSQL = "select count(*) from search_name_".$sPartition;
+        $nEntries = chksql($oDB->getOne($sSQL));
+        if ($nEntries == 0) {
+            unset($aPartitions[$i]);
+        }
+    }
+
+    $sSQL = "select word_token,count(*) from word where substr(word_token, 1, 1) = ' '";
+    $sSQL .= " and class is null and type is null and country_code is null";
+    $sSQL .= " group by word_token having count(*) > 1 order by word_token";

     $aDuplicateTokens = chksql($oDB->getAll($sSQL));
     $aDuplicateTokens = chksql($oDB->getAll($sSQL));

-    foreach($aDuplicateTokens as $aToken)
-    {
+    foreach ($aDuplicateTokens as $aToken) {

         if (trim($aToken['word_token']) == '' || trim($aToken['word_token']) == '-') continue;
         echo "Deduping ".$aToken['word_token']."\n";
         if (trim($aToken['word_token']) == '' || trim($aToken['word_token']) == '-') continue;
         echo "Deduping ".$aToken['word_token']."\n";

-        $sSQL = "select word_id,(select count(*) from search_name where nameaddress_vector @> ARRAY[word_id]) as num from word where word_token = '".$aToken['word_token']."' and class is null and type is null and country_code is null order by num desc";
+        $sSQL = "select word_id,";
+        $sSQL .= " (select count(*) from search_name where nameaddress_vector @> ARRAY[word_id]) as num";
+        $sSQL .= " from word where word_token = '".$aToken['word_token'];
+        $sSQL .= "' and class is null and type is null and country_code is null order by num desc";

         $aTokenSet = chksql($oDB->getAll($sSQL));
 
         $aKeep = array_shift($aTokenSet);
         $iKeepID = $aKeep['word_id'];
 
         $aTokenSet = chksql($oDB->getAll($sSQL));
 
         $aKeep = array_shift($aTokenSet);
         $iKeepID = $aKeep['word_id'];
 

-        foreach($aTokenSet as $aRemove)
-        {
+        foreach ($aTokenSet as $aRemove) {

             $sSQL = "update search_name set";
             $sSQL .= " name_vector = array_replace(name_vector,".$aRemove['word_id'].",".$iKeepID."),";
             $sSQL .= " nameaddress_vector = array_replace(nameaddress_vector,".$aRemove['word_id'].",".$iKeepID.")";
             $sSQL = "update search_name set";
             $sSQL .= " name_vector = array_replace(name_vector,".$aRemove['word_id'].",".$iKeepID."),";
             $sSQL .= " nameaddress_vector = array_replace(nameaddress_vector,".$aRemove['word_id'].",".$iKeepID.")";


@@ -218,8 +214,7 @@ if ($aResult['deduplicate'])
             $sSQL .= " where keywords @> ARRAY[".$aRemove['word_id']."]";
             chksql($oDB->query($sSQL));
 
             $sSQL .= " where keywords @> ARRAY[".$aRemove['word_id']."]";
             chksql($oDB->query($sSQL));
 

-            foreach ($aPartitions as $sPartition)
-            {
+            foreach ($aPartitions as $sPartition) {

                 $sSQL = "update search_name_".$sPartition." set";
                 $sSQL .= " name_vector = array_replace(name_vector,".$aRemove['word_id'].",".$iKeepID.")";
                 $sSQL .= " where name_vector @> ARRAY[".$aRemove['word_id']."]";
                 $sSQL = "update search_name_".$sPartition." set";
                 $sSQL .= " name_vector = array_replace(name_vector,".$aRemove['word_id'].",".$iKeepID.")";
                 $sSQL .= " where name_vector @> ARRAY[".$aRemove['word_id']."]";


@@ -237,140 +232,128 @@ if ($aResult['deduplicate'])
     }
 }
 
     }
 }
 

-if ($aResult['index'])
-{
+if ($aResult['index']) {

     passthru(CONST_InstallPath.'/nominatim/nominatim -i -d '.$aDSNInfo['database'].' -P '.$aDSNInfo['port'].' -t '.$aResult['index-instances'].' -r '.$aResult['index-rank']);
 }
 
     passthru(CONST_InstallPath.'/nominatim/nominatim -i -d '.$aDSNInfo['database'].' -P '.$aDSNInfo['port'].' -t '.$aResult['index-instances'].' -r '.$aResult['index-rank']);
 }
 

-if ($aResult['import-osmosis'] || $aResult['import-osmosis-all'])
-{
-
+if ($aResult['import-osmosis'] || $aResult['import-osmosis-all']) {
+    //

     if (strpos(CONST_Replication_Url, 'download.geofabrik.de') !== false && CONST_Replication_Update_Interval < 86400) {
         fail("Error: Update interval too low for download.geofabrik.de.  Please check install documentation (http://wiki.openstreetmap.org/wiki/Nominatim/Installation#Updates)\n");
     }
 
     if (strpos(CONST_Replication_Url, 'download.geofabrik.de') !== false && CONST_Replication_Update_Interval < 86400) {
         fail("Error: Update interval too low for download.geofabrik.de.  Please check install documentation (http://wiki.openstreetmap.org/wiki/Nominatim/Installation#Updates)\n");
     }
 

-    $sImportFile = CONST_BasePath.'/data/osmosischange.osc';
-    $sOsmosisConfigDirectory = CONST_InstallPath.'/settings';
-    $sCMDDownload = CONST_Osmosis_Binary.' --read-replication-interval workingDirectory='.$sOsmosisConfigDirectory.' --simplify-change --write-xml-change '.$sImportFile;
-    $sCMDCheckReplicationLag = CONST_Osmosis_Binary.' -q --read-replication-lag workingDirectory='.$sOsmosisConfigDirectory;
+    $sImportFile = CONST_InstallPath.'/osmosischange.osc';
+    $sCMDDownload = CONST_Pyosmium_Binary.' --server '.CONST_Replication_Url.' -o '.$sImportFile.' -s '.CONST_Replication_Max_Diff_size;

     $sCMDImport = $sOsm2pgsqlCmd.' '.$sImportFile;
     $sCMDIndex = CONST_InstallPath.'/nominatim/nominatim -i -d '.$aDSNInfo['database'].' -P '.$aDSNInfo['port'].' -t '.$aResult['index-instances'];
 
     $sCMDImport = $sOsm2pgsqlCmd.' '.$sImportFile;
     $sCMDIndex = CONST_InstallPath.'/nominatim/nominatim -i -d '.$aDSNInfo['database'].' -P '.$aDSNInfo['port'].' -t '.$aResult['index-instances'];
 

-    while(true)
-    {
+    while (true) {

         $fStartTime = time();
         $fStartTime = time();

-        $iFileSize = 1001;
-
-        if (!file_exists($sImportFile))
-        {
-            // First check if there are new updates published (except for minutelies - there's always new diffs to process)
-            if ( CONST_Replication_Update_Interval > 60 )
-            {
-
-                unset($aReplicationLag);
-                exec($sCMDCheckReplicationLag, $aReplicationLag, $iErrorLevel); 
-                while ($iErrorLevel > 0 || $aReplicationLag[0] < 1)
-                {
-                    if ($iErrorLevel)
-                    {
-                        echo "Error: $iErrorLevel. ";
-                        echo "Re-trying: ".$sCMDCheckReplicationLag." in ".CONST_Replication_Recheck_Interval." secs\n";
-                    }
-                    else
-                    {
-                        echo ".";
-                    }
+        $aLastState = chksql($oDB->getRow('SELECT *, EXTRACT (EPOCH FROM lastimportdate) as unix_ts FROM import_status'));
+
+        if (!$aLastState['sequence_id']) {
+            echo "Updates not set up. Please run ./utils/update.php --init-updates.\n";
+            exit(1);
+        }
+
+        echo 'Currently at sequence '.$aLastState['sequence_id'].' ('.$aLastState['lastimportdate'].') - '.$aLastState['indexed']." indexed\n";
+
+        $sBatchEnd = $aLastState['lastimportdate'];
+        $iEndSequence = $aLastState['sequence_id'];
+
+        if ($aLastState['indexed'] == 't') {
+            // Sleep if the update interval has not yet been reached.
+            $fNextUpdate = $aLastState['unix_ts'] + CONST_Replication_Update_Interval;
+            if ($fNextUpdate > $fStartTime) {
+                $iSleepTime = $fNextUpdate - $fStartTime;
+                echo "Waiting for next update for $iSleepTime sec.";
+                sleep($iSleepTime);
+            }
+
+            // Download the next batch of changes.
+            do {
+                $fCMDStartTime = time();
+                $iNextSeq = (int) $aLastState['sequence_id'];
+                unset($aOutput);
+                echo "$sCMDDownload -I $iNextSeq\n";
+                unlink($sImportFile);
+                exec($sCMDDownload.' -I '.$iNextSeq, $aOutput, $iResult);
+
+                if ($iResult == 3) {
+                    echo 'No new updates. Sleeping for '.CONST_Replication_Recheck_Interval." sec.\n";

                     sleep(CONST_Replication_Recheck_Interval);
                     sleep(CONST_Replication_Recheck_Interval);

-                    unset($aReplicationLag);
-                    exec($sCMDCheckReplicationLag, $aReplicationLag, $iErrorLevel); 
+                } else if ($iResult != 0) {
+                    echo 'ERROR: updates failed.';
+                    exit($iResult);
+                } else {
+                    $iEndSequence = (int)$aOutput[0];

                 }
                 }

-                // There are new replication files - use osmosis to download the file
-                echo "\n".date('Y-m-d H:i:s')." Replication Delay is ".$aReplicationLag[0]."\n";
+            } while ($iResult);
+
+            // get the newest object from the diff file
+            $sBatchEnd = 0;
+            $iRet = 0;
+            exec(CONST_BasePath.'/utils/osm_file_date.py '.$sImportFile, $sBatchEnd, $iRet);
+            if ($iRet == 5) {
+                echo "Diff file is empty. skipping import.\n";
+                if (!$aResult['import-osmosis-all']) {
+                    exit(0);
+                } else {
+                    continue;
+                }
+            }
+            if ($iRet != 0) {
+                fail('Error getting date from diff file.');

             }
             }

-            $fStartTime = time();
+            $sBatchEnd = $sBatchEnd[0];
+
+            // Import the file

             $fCMDStartTime = time();
             $fCMDStartTime = time();

-            echo $sCMDDownload."\n";
-            exec($sCMDDownload, $sJunk, $iErrorLevel);
-            while ($iErrorLevel > 0)
-            {
-                echo "Error: $iErrorLevel\n";
-                sleep(60);
-                echo 'Re-trying: '.$sCMDDownload."\n";
-                exec($sCMDDownload, $sJunk, $iErrorLevel);
+            echo $sCMDImport."\n";
+            unset($sJunk);
+            exec($sCMDImport, $sJunk, $iErrorLevel);
+            if ($iErrorLevel) {
+                echo "Error executing osm2pgsql: $iErrorLevel\n";
+                exit($iErrorLevel);

             }
             }

+
+            // write the update logs

             $iFileSize = filesize($sImportFile);
             $iFileSize = filesize($sImportFile);

-            $sBatchEnd = getosmosistimestamp($sOsmosisConfigDirectory);
-            $sSQL = "INSERT INTO import_osmosis_log values ('$sBatchEnd',$iFileSize,'".date('Y-m-d H:i:s',$fCMDStartTime)."','".date('Y-m-d H:i:s')."','osmosis')";
+            $sSQL = "INSERT INTO import_osmosis_log (batchend, batchseq, batchsize, starttime, endtime, event) values ('$sBatchEnd',$iEndSequence,$iFileSize,'".date('Y-m-d H:i:s', $fCMDStartTime)."','".date('Y-m-d H:i:s')."','import')";

             var_Dump($sSQL);
             var_Dump($sSQL);

-            $oDB->query($sSQL);
-            echo date('Y-m-d H:i:s')." Completed osmosis step for $sBatchEnd in ".round((time()-$fCMDStartTime)/60,2)." minutes\n";
-        }
+            chksql($oDB->query($sSQL));

 
 

-        $iFileSize = filesize($sImportFile);
-        $sBatchEnd = getosmosistimestamp($sOsmosisConfigDirectory);
-
-        // Import the file
-        $fCMDStartTime = time();
-        echo $sCMDImport."\n";
-        exec($sCMDImport, $sJunk, $iErrorLevel);
-        if ($iErrorLevel)
-        {
-            echo "Error: $iErrorLevel\n";
-            exit($iErrorLevel);
+            // update the status
+            $sSQL = "UPDATE import_status SET lastimportdate = '$sBatchEnd', indexed=false, sequence_id = $iEndSequence";
+            var_Dump($sSQL);
+            chksql($oDB->query($sSQL));
+            echo date('Y-m-d H:i:s')." Completed download step for $sBatchEnd in ".round((time()-$fCMDStartTime)/60, 2)." minutes\n";

         }
         }

-        $sSQL = "INSERT INTO import_osmosis_log values ('$sBatchEnd',$iFileSize,'".date('Y-m-d H:i:s',$fCMDStartTime)."','".date('Y-m-d H:i:s')."','osm2pgsql')";
-        var_Dump($sSQL);
-        $oDB->query($sSQL);
-        echo date('Y-m-d H:i:s')." Completed osm2pgsql step for $sBatchEnd in ".round((time()-$fCMDStartTime)/60,2)." minutes\n";
-
-        // Archive for debug?
-        unlink($sImportFile);
-
-        $sBatchEnd = getosmosistimestamp($sOsmosisConfigDirectory);

 
         // Index file
 
         // Index file

-        $sThisIndexCmd = $sCMDIndex;
-        $fCMDStartTime = time();
+        if (!$aResult['no-index']) {
+            $sThisIndexCmd = $sCMDIndex;
+            $fCMDStartTime = time();

 
 

-        if (!$aResult['no-index'])
-        {

             echo "$sThisIndexCmd\n";
             exec($sThisIndexCmd, $sJunk, $iErrorLevel);
             echo "$sThisIndexCmd\n";
             exec($sThisIndexCmd, $sJunk, $iErrorLevel);

-            if ($iErrorLevel)
-            {
+            if ($iErrorLevel) {

                 echo "Error: $iErrorLevel\n";
                 exit($iErrorLevel);
             }
                 echo "Error: $iErrorLevel\n";
                 exit($iErrorLevel);
             }

-        }

 
 

-        $sSQL = "INSERT INTO import_osmosis_log values ('$sBatchEnd',$iFileSize,'".date('Y-m-d H:i:s',$fCMDStartTime)."','".date('Y-m-d H:i:s')."','index')";
-        var_Dump($sSQL);
-        $oDB->query($sSQL);
-        echo date('Y-m-d H:i:s')." Completed index step for $sBatchEnd in ".round((time()-$fCMDStartTime)/60,2)." minutes\n";
+            $sSQL = "INSERT INTO import_osmosis_log (batchend, batchseq, batchsize, starttime, endtime, event) values ('$sBatchEnd',$iEndSequence,$iFileSize,'".date('Y-m-d H:i:s', $fCMDStartTime)."','".date('Y-m-d H:i:s')."','index')";
+            var_Dump($sSQL);
+            $oDB->query($sSQL);
+            echo date('Y-m-d H:i:s')." Completed index step for $sBatchEnd in ".round((time()-$fCMDStartTime)/60, 2)." minutes\n";

 
 

-        $sSQL = "update import_status set lastimportdate = '$sBatchEnd'";
-        $oDB->query($sSQL);
+            $sSQL = "update import_status set indexed = true";
+            $oDB->query($sSQL);
+        }

 
         $fDuration = time() - $fStartTime;
 
         $fDuration = time() - $fStartTime;

-        echo date('Y-m-d H:i:s')." Completed all for $sBatchEnd in ".round($fDuration/60,2)." minutes\n";
+        echo date('Y-m-d H:i:s')." Completed all for $sBatchEnd in ".round($fDuration/60, 2)." minutes\n";

         if (!$aResult['import-osmosis-all']) exit(0);
         if (!$aResult['import-osmosis-all']) exit(0);

-
-        if ( CONST_Replication_Update_Interval > 60 )
-        {
-            $iSleep = max(0,(strtotime($sBatchEnd)+CONST_Replication_Update_Interval-time()));
-        }
-        else
-        {
-            $iSleep = max(0,CONST_Replication_Update_Interval-$fDuration);
-        }
-        echo date('Y-m-d H:i:s')." Sleeping $iSleep seconds\n";
-        sleep($iSleep);

     }
 }
 
     }
 }
 

-function getosmosistimestamp($sOsmosisConfigDirectory)
-{
-    $sStateFile = file_get_contents($sOsmosisConfigDirectory.'/state.txt');
-    preg_match('#timestamp=(.+)#', $sStateFile, $aResult);
-    return str_replace('\:',':',$aResult[1]);
-}