Added logging system, but still not used

src/sandbox.c

@@ -67,9 +67,6 @@ int main(int argc, char** argv) {
 	}
 
 	// TODO: Parse commands from the command line
-	char* container;
-	get_oldest_container(&container);
-	printf("Oldest container: %s\n", container);
 }
 
 int command_help(int argc, char* argv[]) {

src/utils.c

@@ -14,6 +14,64 @@
 
 char _ERROR_BUFFER[ERROR_BUFFER_SIZE];
 
+log_level_t _LOG_LEVEL = LOG_LEVEL_INFO;
+
+void set_log_level(log_level_t level) {
+	_LOG_LEVEL = level;
+}
+
+void log_message(log_level_t level, const char* format, ...) {
+	// Check that the log level is high enough
+	if (level < _LOG_LEVEL)
+		return;
+
+	// Convert the log level to a color and a string
+	const char* color_str;
+	const char* level_str;
+
+	switch (level) {
+	case LOG_LEVEL_DEBUG:
+		color_str = "\033[0m";
+		level_str = "DEBUG";
+		break;
+	case LOG_LEVEL_INFO:
+		color_str = "\033[36m";
+		level_str = "INFO";
+		break;
+	case LOG_LEVEL_WARNING:
+		color_str = "\033[33m";
+		level_str = "WARNING";
+		break;
+	case LOG_LEVEL_ERROR:
+		color_str = "\033[31m";
+		level_str = "ERROR";
+		break;
+	default:
+		color_str = "\033[0m";
+		level_str = "UNKNOWN";
+		break;
+	}
+
+	// Get the current time
+	time_t t = time(NULL);
+	struct tm* tm = localtime(&t);
+
+	// Print the log message
+	fprintf(stderr, "%s[%02d/%02d/%04d %02d:%02d:%02d - %s]\033[0m ", color_str, tm->tm_mday, tm->tm_mon + 1, tm->tm_year + 1900, tm->tm_hour, tm->tm_min, tm->tm_sec, level_str);
+
+	va_list args;
+	va_start(args, format);
+
+	vfprintf(stderr, format, args);
+
+	va_end(args);
+
+	fprintf(stderr, "\n");
+
+	// Flush the standard error stream
+	fflush(stderr);
+}
+
 result_t success(void) {
 	return EXIT_SUCCESS;
 }

src/utils.h

@@ -6,10 +6,40 @@
 
 #define ERROR_BUFFER_SIZE 4096
 
+/// @brief The global error buffer. It can be accessed using the error() function.
 extern char _ERROR_BUFFER[];
 
+/// @brief The level of importance of a log message.
+typedef enum {
+	/// @brief A debug message. These messages are used for debugging purposes, and are not meant to be seen by the user.
+	LOG_LEVEL_DEBUG,
+
+	/// @brief An info message. These messages are used to inform the user about the progress of the program.
+	LOG_LEVEL_INFO,
+
+	/// @brief A warning message. These messages are used to warn the user about potential issues.
+	LOG_LEVEL_WARNING,
+
+	/// @brief An error message. These messages are used to inform the user that a critical error has occurred.
+	LOG_LEVEL_ERROR,
+} log_level_t;
+
+/// @brief The minimum log level of the program.
+extern log_level_t _LOG_LEVEL;
+
+/// @brief The result of an operation.
 typedef int result_t;
 
+/// @brief Sets the log level of the program.
+/// @param level The log level to set.
+void set_log_level(log_level_t level);
+
+/// @brief Logs a message with the given level, and the given format string and arguments.
+/// @param level The level of the message.
+/// @param format The format string to use for the message.
+/// @param ... The arguments to use for the format string.
+void log_message(log_level_t level, const char* format, ...);
+
 /// @brief Returns a generic success result.
 /// @return The success result.
 result_t success(void);