From e2f72297e4d71c35cca71952b1739d69700ee570 Mon Sep 17 00:00:00 2001
From: Martin Bauer <bauer_martin@gmx.de>
Date: Fri, 23 Jul 2021 10:34:34 +0200
Subject: [PATCH] Fix in old session delete

---
 firmware/lib/session/SimpleMeasurementSession.h | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/firmware/lib/session/SimpleMeasurementSession.h b/firmware/lib/session/SimpleMeasurementSession.h
index 1c9d479..c40261a 100644
--- a/firmware/lib/session/SimpleMeasurementSession.h
+++ b/firmware/lib/session/SimpleMeasurementSession.h
@@ -112,7 +112,7 @@ private:
         auto freeBytes = portablefs::totalBytes() - portablefs::usedBytes();
         while (freeBytes < requiredSpace)
         {
-            uint32_t nextSessionToDelete = 0;
+            uint32_t nextSessionToDelete = uint32_t(-1);
 
             auto dir = portablefs::openDir(CONFIG_DATA_PATH);
             String filenameToDelete;
@@ -122,7 +122,7 @@ private:
                 {
                     const auto fileName = dir.fileName();
                     const auto fileNameWithoutDir = fileName.substring(fileName.lastIndexOf("/") + 1);
-                    auto sessionId = fileNameWithoutDir.toInt();
+                    uint32_t sessionId = fileNameWithoutDir.toInt();
                     if (sessionId < nextSessionToDelete)
                     {
                         nextSessionToDelete = sessionId;
@@ -131,6 +131,7 @@ private:
                 }
             }
             assert(nextSessionToDelete > 0);
+            assert(nextSessionToDelete < uint32_t(-1));
             Serial.printf("Removing old session %s to make space\n", filenameToDelete.c_str());
             portablefs::remove(filenameToDelete.c_str());
             auto newFreeBytes = portablefs::totalBytes() - portablefs::usedBytes();