adopt explicit initialization - with the exception of trivial classes (#122)

lib/framework/APSettingsService.cpp

@@ -8,7 +8,8 @@ APSettingsService::APSettingsService(AsyncWebServer* server, FS* fs, SecurityMan
                   AP_SETTINGS_SERVICE_PATH,
                   securityManager),
     _fsPersistence(APSettings::serialize, APSettings::deserialize, this, fs, AP_SETTINGS_FILE),
-    _dnsServer(nullptr) {
+    _dnsServer(nullptr),
+    _lastManaged(0) {
   addUpdateHandler([&](const String& originId) { reconfigureAP(); }, false);
 }
 

lib/framework/APSettingsService.h

@@ -68,12 +68,12 @@ class APSettingsService : public StatefulService<APSettings> {
   HttpEndpoint<APSettings> _httpEndpoint;
   FSPersistence<APSettings> _fsPersistence;
 
-  // for the mangement delay loop
-  unsigned long _lastManaged;
-
   // for the captive portal
   DNSServer* _dnsServer;
 
+  // for the mangement delay loop
+  unsigned long _lastManaged;
+
   void reconfigureAP();
   void manageAP();
   void startAP();

lib/framework/FSPersistence.h

@@ -20,7 +20,8 @@ class FSPersistence {
       _jsonDeserializer(jsonDeserializer),
       _statefulService(statefulService),
       _fs(fs),
-      _filePath(filePath) {
+      _filePath(filePath),
+      _updateHandlerId(0) {
     enableUpdateHandler();
   }
 
@@ -85,7 +86,7 @@ class FSPersistence {
   StatefulService<T>* _statefulService;
   FS* _fs;
   char const* _filePath;
-  update_handler_id_t _updateHandlerId = 0;
+  update_handler_id_t _updateHandlerId;
 
  protected:
   // We assume the deserializer supplies sensible defaults if an empty object

lib/framework/MqttSettingsService.cpp

@@ -27,7 +27,15 @@ MqttSettingsService::MqttSettingsService(AsyncWebServer* server, FS* fs, Securit
                   server,
                   MQTT_SETTINGS_SERVICE_PATH,
                   securityManager),
-    _fsPersistence(MqttSettings::serialize, MqttSettings::deserialize, this, fs, MQTT_SETTINGS_FILE) {
+    _fsPersistence(MqttSettings::serialize, MqttSettings::deserialize, this, fs, MQTT_SETTINGS_FILE),
+    _retainedHost(nullptr),
+    _retainedClientId(nullptr),
+    _retainedUsername(nullptr),
+    _retainedPassword(nullptr),
+    _reconfigureMqtt(false),
+    _disconnectedAt(0),
+    _disconnectReason(AsyncMqttClientDisconnectReason::TCP_DISCONNECTED),
+    _mqttClient() {
 #ifdef ESP32
   WiFi.onEvent(
       std::bind(&MqttSettingsService::onStationModeDisconnected, this, std::placeholders::_1, std::placeholders::_2),

lib/framework/MqttSettingsService.h

@@ -121,19 +121,22 @@ class MqttSettingsService : public StatefulService<MqttSettings> {
   FSPersistence<MqttSettings> _fsPersistence;
 
   // Pointers to hold retained copies of the mqtt client connection strings.
-  // Required as AsyncMqttClient holds refrences to the supplied connection strings.
+  // This is required as AsyncMqttClient holds refrences to the supplied connection strings.
-  char* _retainedHost = nullptr;
+  char* _retainedHost;
-  char* _retainedClientId = nullptr;
+  char* _retainedClientId;
-  char* _retainedUsername = nullptr;
+  char* _retainedUsername;
-  char* _retainedPassword = nullptr;
+  char* _retainedPassword;
 
-  AsyncMqttClient _mqttClient;
+  // variable to help manage connection
   bool _reconfigureMqtt;
   unsigned long _disconnectedAt;
 
   // connection status
   AsyncMqttClientDisconnectReason _disconnectReason;
 
+  // the MQTT client instance
+  AsyncMqttClient _mqttClient;
+
 #ifdef ESP32
   void onStationModeGotIP(WiFiEvent_t event, WiFiEventInfo_t info);
   void onStationModeDisconnected(WiFiEvent_t event, WiFiEventInfo_t info);

lib/framework/SecuritySettingsService.cpp

@@ -7,7 +7,8 @@ SecuritySettingsService::SecuritySettingsService(AsyncWebServer* server, FS* fs)
                   server,
                   SECURITY_SETTINGS_PATH,
                   this),
-    _fsPersistence(SecuritySettings::serialize, SecuritySettings::deserialize, this, fs, SECURITY_SETTINGS_FILE) {
+    _fsPersistence(SecuritySettings::serialize, SecuritySettings::deserialize, this, fs, SECURITY_SETTINGS_FILE),
+    _jwtHandler(FACTORY_JWT_SECRET) {
   addUpdateHandler([&](const String& originId) { configureJWTHandler(); }, false);
 }
 

lib/framework/SecuritySettingsService.h

@@ -77,7 +77,7 @@ class SecuritySettingsService : public StatefulService<SecuritySettings>, public
  private:
   HttpEndpoint<SecuritySettings> _httpEndpoint;
   FSPersistence<SecuritySettings> _fsPersistence;
-  ArduinoJsonJWT _jwtHandler = ArduinoJsonJWT(FACTORY_JWT_SECRET);
+  ArduinoJsonJWT _jwtHandler;
 
   void configureJWTHandler();
 

lib/framework/WiFiSettingsService.cpp

@@ -7,7 +7,8 @@ WiFiSettingsService::WiFiSettingsService(AsyncWebServer* server, FS* fs, Securit
                   server,
                   WIFI_SETTINGS_SERVICE_PATH,
                   securityManager),
-    _fsPersistence(WiFiSettings::serialize, WiFiSettings::deserialize, this, fs, WIFI_SETTINGS_FILE) {
+    _fsPersistence(WiFiSettings::serialize, WiFiSettings::deserialize, this, fs, WIFI_SETTINGS_FILE),
+    _lastConnectionAttempt(0) {
   // We want the device to come up in opmode=0 (WIFI_OFF), when erasing the flash this is not the default.
   // If needed, we save opmode=0 before disabling persistence so the device boots with WiFi disabled in the future.
   if (WiFi.getMode() != WIFI_OFF) {