added application setting 'disable factory' Feature request->Button anti tampering mode

Fixes #3150

src/core/system.cpp

@@ -677,6 +677,7 @@ void System::store_settings(WebSettings & settings) {
     locale_         = settings.locale;
     system_name_    = settings.system_name;
     developer_mode_ = settings.developer_mode;
+    disable_reset_ = settings.disable_reset;
 }
 
 // Starts up core services
@@ -761,6 +762,10 @@ void System::button_OnLongPress(PButton & b) {
 
 // button indefinite press
 void System::button_OnVLongPress(PButton & b) {
+    if (EMSESP::system_.disable_reset()) {
+        LOG_NOTICE("Factory reset disabled");
+        return;
+    }
     LOG_NOTICE("Button pressed - very long press - perform factory reset");
     EMSESP::led_.start_led_fast_flash(5); // Start LED flash timer for 5 seconds
 }
@@ -2646,6 +2651,7 @@ bool System::command_info(const char * value, const int8_t id, JsonObject output
         node["modbusEnabled"]   = settings.modbus_enabled;
         node["forceHeatingOff"] = settings.boiler_heatingoff;
         node["developerMode"]   = settings.developer_mode;
+        node["disableReset"]    = settings.disable_reset;
     });
 
     // Devices - show EMS devices if we have any
@@ -2870,6 +2876,12 @@ bool System::command_txpause(const char * value, const int8_t id) {
 
 // format command - factory reset, removing all config files
 bool System::command_format(const char * value, const int8_t id) {
+
+    if (EMSESP::system_.disable_reset()) {
+        LOG_NOTICE("Factory reset disabled");
+        return false;
+    }
+
 #if !defined(EMSESP_STANDALONE) && !defined(EMSESP_TEST)
     // don't really format the filesystem in test or standalone mode
     if (LittleFS.format()) {