add generic callback signaler

include/cfglr_signaler_callback.h

@@ -0,0 +1,14 @@
+typedef void (*cfglr_callback_t)(cfglr_signaler_t *signaler, cfglr_element_t *element, cfglr_signal_e sig);
+
+typedef struct {
+  cfglr_callback_t callback;
+} cfglr_callback_handle_t;
+
+void cfglr_signaler_callback_init(cfglr_signaler_t *signaler, cfglr_element_t *element, cfglr_handle_t *handle);
+void cfglr_signaler_callback_dispatch(cfglr_signaler_t *signaler, cfglr_element_t *element, cfglr_signal_e sig);
+
+#define CFGLR_SIGNALER_CALLBACK(FN_CALLBACK) (cfglr_signaler_t){\
+  .init = &cfglr_signaler_callback_init,\
+  .dispatch = &cfglr_signaler_callback_dispatch,\
+  .handle = (void*)FN_CALLBACK\
+}

include/configulator.h

@@ -115,7 +115,9 @@ struct cfglr_handle_struct {
 uint8_t cfglr_init(cfglr_handle_t *handle);
 uint8_t cfglr_fetch_data(cfglr_backend_t *backend, cfglr_element_t *element, cfglr_handle_t *handler);
 
+#include "cfglr_log.h"
 #include "cfglr_nvs.h"
+#include "cfglr_signaler_callback.h"
 #include "cfglr_signaler_idf_event.h"
 #include "cfglr_signaler_lvgl.h"
 

src/cfglr_signal_callback.c

@@ -0,0 +1,16 @@
+#include "configulator.h"
+
+#define TAG "CFGLR_SIG_CB"
+
+void cfglr_signaler_callback_init(cfglr_signaler_t *signaler, cfglr_element_t *element, cfglr_handle_t *handle) {
+  CFGLR_LOGI(TAG, "init");
+}
+
+void cfglr_signaler_callback_dispatch(cfglr_signaler_t *signaler, cfglr_element_t *element, cfglr_signal_e sig) {
+  CFGLR_LOGI(TAG, "dispatch");
+
+  if(signaler->handle != NULL) {
+    cfglr_callback_t callback = signaler->handle;
+    callback(signaler, element, sig);
+  }
+}