From 64994ed50bf27f21ec4a17c241f72bc333ed1afe Mon Sep 17 00:00:00 2001
From: Jacek Kowalski <Jacek@jacekk.info>
Date: Wed, 20 Feb 2019 09:00:24 +0000
Subject: [PATCH] Use transaction to add mapping to the DB

---
 parse.php |   30 ++++++++++++++++--------------
 1 files changed, 16 insertions(+), 14 deletions(-)

diff --git a/parse.php b/parse.php
index 432b3ef..f438ba6 100644
--- a/parse.php
+++ b/parse.php
@@ -52,33 +52,35 @@
 		
 		$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 +90,7 @@
 		
 		if(is_array($previousMapping)) {
 			$logger->info('Merging previous data with current mapping');
-			$mapping = $previousMapping + $mapping;
+			$mapping = $mapping + $previousMapping;
 			ksort($mapping);
 		}
 		

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