From e65b1e3075f9ef87899eb73b073a35f36cc52cd0 Mon Sep 17 00:00:00 2001
From: bogdan <bogd@live.ru>
Date: Mon, 8 May 2023 19:19:05 +0200
Subject: [PATCH] formated string file logging

---
 include/webguiapp.h |  2 +-
 src/WebGUIAppMain.c | 15 ++++++++++-----
 2 files changed, 11 insertions(+), 6 deletions(-)

diff --git a/include/webguiapp.h b/include/webguiapp.h
index 5a0cf57..799971e 100644
--- a/include/webguiapp.h
+++ b/include/webguiapp.h
@@ -40,6 +40,6 @@ esp_err_t spi_device_polling_transmit_synchronized(spi_device_handle_t handle, s
 
 bool GetUserAppNeedReset(void);
 void SetUserAppNeedReset(bool res);
-void LogFile(char *fname, char *mess);
+void LogFile(char *fname, char *format, ...);
 
 #endif /* COMPONENTS_WEBGUIAPPCOMPONENT_INCLUDE_WEBGUIAPP_H_ */
diff --git a/src/WebGUIAppMain.c b/src/WebGUIAppMain.c
index d84864c..5d3bd87 100644
--- a/src/WebGUIAppMain.c
+++ b/src/WebGUIAppMain.c
@@ -510,9 +510,10 @@ void SetUserAppNeedReset(bool res)
     isUserAppNeedReset = res;
 }
 
-void LogFile(char *fname, char *mess)
+void LogFile(char *fname, char *format, ...)
 {
     char filename[32];
+    char tstamp[16];
     strcpy(filename, "/data/");
     strcat(filename, fname);
     FILE *f = fopen(filename, "a");
@@ -521,10 +522,14 @@ void LogFile(char *fname, char *mess)
         ESP_LOGE(TAG, "Failed to open file %s for writing", filename);
         return;
     }
-    fwrite(esp_log_system_timestamp(), 1, 12, f);
-    fwrite(" ", 1, 1, f);
-    fwrite(mess, 1, strlen(mess), f);
-    fwrite("\r\n", 1, 2, f);
+    va_list arg;
+    va_start(arg, format);
+    va_end(arg);
+    strcpy(tstamp, "\r\n");
+    strcat(tstamp, esp_log_system_timestamp());
+    strcat(tstamp, " ");
+    fwrite(tstamp, 1, 15, f);
+    vfprintf(f, format, arg);
     fclose(f);
     ESP_LOGI(TAG, "File written to %s", filename);
 }