Logger.h

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#pragma once
 
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#include "Arduino.h"
 
#define DLNA_MAX_LOG_SIZE 800
 
namespace tiny_dlna {
 
enum DlnaLogLevel { DlnaDebug, DlnaInfo, DlnaWarning, DlnaError };
 
static const char* HttpDlnaLogLevelStr[] = {"Debug", "Info", "Warning", "Error"};
 
class LoggerClass {
 public:
 
  // activate the logging
  virtual void begin(Print& out, DlnaLogLevel level = DlnaError) {
    this->log_stream_ptr = &out;
    this->log_level = level;
  }
 
  void setLevel(DlnaLogLevel l) { log_level = l; }
 
  // checks if the logging is active
  virtual bool isLogging() { return log_stream_ptr != nullptr; }
 
  void log(DlnaLogLevel current_level, const char* fmt...) {
    if (current_level >= log_level && log_stream_ptr != nullptr &&
        fmt != nullptr) {
      char log_buffer[DLNA_MAX_LOG_SIZE];
      strcpy(log_buffer, "DLNA - ");
      strcat(log_buffer, HttpDlnaLogLevelStr[current_level]);
      strcat(log_buffer, ":     ");
      va_list arg;
      va_start(arg, fmt);
      vsnprintf(log_buffer + 15, DLNA_MAX_LOG_SIZE - 15, fmt, arg);
      va_end(arg);
      log_stream_ptr->println(log_buffer);
    }
  }
 
 protected:
  Print* log_stream_ptr = &Serial;
  DlnaLogLevel log_level = DlnaWarning;
};
 
extern LoggerClass DlnaLogger;
 
}  // namespace tiny_dlna