getTimeFromString take format specifiers as input variable

Author: pennam

src/utility/time/TimeService.cpp

@@ -105,13 +105,14 @@ unsigned long TimeService::getLocalTime()
   return utc + _timezone_offset;
 }
 
-unsigned long TimeService::getTimeFromString(const String& timeString)
+unsigned long TimeService::getTimeFromString(const String& timeString, const String& timeStringFormat)
 {
   struct tm t;
   std::istringstream ss(timeString.c_str());
-  ss >> std::get_time(&t, "%Y %b %d %H:%M:%S");
+  ss >> std::get_time(&t, timeStringFormat.c_str());
 
   if(!ss) {
+    DEBUG_ERROR("ArduinoIoTCloudTCP::%s invalid timeString input", __FUNCTION__);
     return 0;
   } else {
     return mktime(&t);

src/utility/time/TimeService.h

@@ -50,7 +50,8 @@ class TimeService
   unsigned long getTime();
   unsigned long getLocalTime();
   void          setTimeZoneData(int offset, unsigned int valid_until);
-  static unsigned long getTimeFromString(const String& timeString);
+  /* Helper function to convert a timeString into a UNIX timestamp. The format specifiers match the POSIX function strptime()*/
+  static unsigned long getTimeFromString(const String& timeString, const String& timeStringFormat);
 
 private: