From 557c5d645e2e8723116a0b063b2b8f586da638f5 Mon Sep 17 00:00:00 2001
From: Thomas Basler <thomas@familie-basler.net>
Date: Tue, 30 Jan 2024 22:29:12 +0100
Subject: [PATCH] Remove all files but the pin_mapping.json from filesystem on
 factory reset

This allows to create more user defined files and get them deleted on factory reset.
---
 include/Utils.h       |  1 +
 src/Utils.cpp         | 16 ++++++++++++++++
 src/WebApi_config.cpp |  2 +-
 3 files changed, 18 insertions(+), 1 deletion(-)

diff --git a/include/Utils.h b/include/Utils.h
index 4d4bfee..fddc2ab 100644
--- a/include/Utils.h
+++ b/include/Utils.h
@@ -11,4 +11,5 @@ public:
     static int getTimezoneOffset();
     static void restartDtu();
     static bool checkJsonAlloc(const DynamicJsonDocument& doc, const char* function, const uint16_t line);
+    static void removeAllFiles();
 };
diff --git a/src/Utils.cpp b/src/Utils.cpp
index 386e0ed..7ad0729 100644
--- a/src/Utils.cpp
+++ b/src/Utils.cpp
@@ -6,7 +6,9 @@
 #include "Display_Graphic.h"
 #include "Led_Single.h"
 #include "MessageOutput.h"
+#include "PinMapping.h"
 #include <Esp.h>
+#include <LittleFS.h>
 
 uint32_t Utils::getChipId()
 {
@@ -76,3 +78,17 @@ bool Utils::checkJsonAlloc(const DynamicJsonDocument& doc, const char* function,
 
     return true;
 }
+
+/// @brief Remove all files but the PINMAPPING_FILENAME
+void Utils::removeAllFiles()
+{
+    auto root = LittleFS.open("/");
+    auto file = root.getNextFileName();
+
+    while (file != "") {
+        if (file != PINMAPPING_FILENAME) {
+            LittleFS.remove(file);
+        }
+        file = root.getNextFileName();
+    }
+}
diff --git a/src/WebApi_config.cpp b/src/WebApi_config.cpp
index c275ffc..29f3531 100644
--- a/src/WebApi_config.cpp
+++ b/src/WebApi_config.cpp
@@ -108,7 +108,7 @@ void WebApiConfigClass::onConfigDelete(AsyncWebServerRequest* request)
     response->setLength();
     request->send(response);
 
-    LittleFS.remove(CONFIG_FILENAME);
+    Utils::removeAllFiles();
     Utils::restartDtu();
 }