From 9afb6bced6e66683efe2ba570fccecbe754bfde7 Mon Sep 17 00:00:00 2001
From: Jacek Kowalski <Jacek@jacekk.info>
Date: Mon, 10 Jun 2019 20:44:20 +0000
Subject: [PATCH] Check if data timestamps are recent before doing any DB changes
---
parse.php | 58 +++++++++++++++++++++++++++++++++++-----------------------
1 files changed, 35 insertions(+), 23 deletions(-)
diff --git a/parse.php b/parse.php
index 432b3ef..b3014b8 100644
--- a/parse.php
+++ b/parse.php
@@ -6,9 +6,9 @@
$logger = new Monolog\Logger('Parse changes');
$sources = [
- 'buses' => [
- 'gtfs' => 'ftp://ztp.krakow.pl/VehiclePositions_A.pb',
- 'gtfs_file' => 'VehiclePositions_A.pb',
+ 'bus' => [
+ 'gtfsrt' => 'ftp://ztp.krakow.pl/VehiclePositions_A.pb',
+ 'gtfsrt_file' => 'VehiclePositions_A.pb',
'ttss' => 'http://91.223.13.70/internetservice/geoserviceDispatcher/services/vehicleinfo/vehicles',
'ttss_file' => 'vehicles_A.json',
'database' => 'mapping_A.sqlite3',
@@ -19,25 +19,35 @@
foreach($sources as $name => $source) {
$logger = new Monolog\Logger('fetch_'.$name);
try {
- foreach(['gtfs_file', 'ttss_file', 'database', 'result'] as $field) {
+ foreach(['gtfsrt_file', 'ttss_file', 'database', 'result'] as $field) {
$source[$field] = __DIR__.'/data/'.$source[$field];
}
$source['result_temp'] = $source['result'].'.tmp';
$logger->info('Fetching '.$name.' position data from FTP...');
- $updated = ftp_fetch_if_newer($source['gtfs'], $source['gtfs_file']);
+ $updated = ftp_fetch_if_newer($source['gtfsrt'], $source['gtfsrt_file']);
if(!$updated) {
$logger->info('Nothing to do, remote file not newer than local one');
continue;
}
- $logger->info('Fetching '.$name.' positions from TTSS...');
- fetch($source['ttss'],$source['ttss_file']);
+ $logger->info('Fetching '.$name.' position data from TTSS...');
+ fetch($source['ttss'], $source['ttss_file']);
$logger->info('Loading data...');
$mapper = new Mapper();
+
$mapper->loadTTSS($source['ttss_file']);
- $mapper->loadGTFS($source['gtfs_file']);
+ $timeDifference = time() - $mapper->getTTSSDate();
+ if(abs($timeDifference) > 60) {
+ throw new Exception('TTSS timestamp difference ('.$timeDifference.'s) is too high, aborting!');
+ }
+
+ $mapper->loadGTFSRT($source['gtfsrt_file']);
+ $timeDifference = time() - $mapper->getGTFSRTDate();
+ if(abs($timeDifference) > 60) {
+ throw new Exception('GTFSRT timestamp difference ('.$timeDifference.'s) is too high, aborting!');
+ }
$db = new Database($source['database']);
@@ -48,37 +58,39 @@
}
$logger->info('Got offset '.$offset.', creating mapping...');
- $mapping = $mapper->getMapping($offset);
+ $mapping = $mapper->mapUsingOffset($offset);
$logger->info('Checking the data for correctness...');
$weight = count($mapping);
- $replace = 0;
- $ignore = 0;
+
+ $correct = 0;
+ $incorrect = 0;
+ $old = 0;
+ $maxWeight = 0;
foreach($mapping as $id => $vehicle) {
$dbVehicle = $db->getById($id);
if($dbVehicle) {
- if((int)substr($vehicle['num'], 2) != (int)$dbVehicle['num']) {
- if($weight > $dbVehicle['weight']) {
- $replace += 1;
- } else {
- $ignore += 1;
- }
+ $maxWeight = max($maxWeight, $dbVehicle['weight']);
+ if((int)substr($vehicle['num'], 2) == (int)$dbVehicle['num']) {
+ $correct += 1;
+ } else {
+ $incorrect += 1;
}
continue;
}
$dbVehicle = $db->getByNum($vehicle['num']);
if($dbVehicle && $dbVehicle['id'] != $id) {
- $replace += 1;
+ $old += 1;
}
}
- $logger->info('Weight: '.$weight.', ignore: '.$ignore.', replace: '.$replace);
+ $logger->info('Weight: '.$weight.', correct: '.$correct.', incorrect: '.$incorrect.', old: '.$old);
$previousMapping = NULL;
- if($ignore > 0 && $ignore >= $replace) {
+ if($incorrect > $correct && $maxWeight > $weight) {
throw new Exception('Ignoring result due to better data already present');
- } elseif($replace > 0) {
- $logger->warn('Replacing DB data with the mapping');
+ } elseif($old > $correct) {
+ $logger->warn('Replacing DB data with the new mapping');
$db->clear();
} else {
$previousMapping = @json_decode(@file_get_contents($source['result']), TRUE);
@@ -88,7 +100,7 @@
if(is_array($previousMapping)) {
$logger->info('Merging previous data with current mapping');
- $mapping = $previousMapping + $mapping;
+ $mapping = $mapping + $previousMapping;
ksort($mapping);
}
--
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