logger

func Debugf ¶

func Debugf(format string, args ...interface{})

Debugf formats and prints a debug message with timestamp if ShowDebug is enabled. The message is formatted according to the format specifier and arguments provided. Output format: [YYYY-MM-DD HH:MM:SS] DEBUG: <formatted message>

Parameters:

• format: A format string following fmt.Sprintf conventions
• args: Variable number of arguments to be formatted according to the format string

The function will only produce output when the global ShowDebug flag is set to true.

func Errorf ¶

func Errorf(format string, args ...interface{})

Errorf logs an error message with formatted arguments. It formats the message using fmt.Sprintf with the provided format string and arguments, then prints it to standard output with an ERROR prefix and current timestamp. The timestamp format is "2006-01-02 15:04:05".

Parameters:

• format: A format string following fmt.Sprintf conventions
• args: Variadic arguments to be formatted according to the format string

Example:

logger.Errorf("failed to connect to database: %v", err)

func Fatalf ¶

func Fatalf(format string, args ...interface{})

Fatalf logs a formatted fatal message with timestamp and terminates the program with exit code 1. The function formats the message according to the format specifier and arguments provided, prepends it with the current timestamp in "2006-01-02 15:04:05" format and "FATAL" level, then calls log.Fatalf which prints the message and exits the program.

Parameters:

• format: A format string following fmt.Printf conventions
• args: Variable number of arguments to be formatted according to the format string

Note: This function does not return as it terminates the program execution.

func Infof ¶

func Infof(format string, args ...interface{})

Infof logs an informational message with formatted output. It formats the message according to the format specifier and arguments, prefixes it with a timestamp in "2006-01-02 15:04:05" format and "INFO" level, then outputs to standard output.

Parameters:

• format: A format string following fmt.Sprintf conventions
• args: Variable arguments to be formatted according to the format string

Example:

Infof("User %s logged in at %d", username, loginTime)

func PrintHex ¶

func PrintHex(data []byte)

PrintHex prints the hexadecimal representation of the provided byte slice to stdout. The output includes a timestamp in the format "2006-01-02 15:04:05" followed by the hex-encoded data. The function only produces output if the ShowOutput flag is set to true.

func Printf ¶

func Printf(format string, args ...interface{})

Printf formats and prints a log message with a timestamp prefix. The message is only printed if ShowOutput is true. The format string and arguments follow the same conventions as fmt.Sprintf. Each log entry is prefixed with the current timestamp in "2006-01-02 15:04:05" format.

Parameters:

• format: A format string following fmt.Sprintf conventions
• args: Variadic arguments to be formatted according to the format string

Example:

Printf("User %s logged in at %d", username, loginTime)

func Vardump ¶

func Vardump(v any)

Vardump prints a formatted JSON representation of the given value to standard output. It uses json.MarshalIndent with 2-space indentation for readable output. Any marshaling errors are silently ignored.

Parameters:

• v: any value to be printed as formatted JSON

Example:

type User struct {
    Name string
    Age  int
}
user := User{Name: "John", Age: 30}
Vardump(user)
// Output:
// {
//   "Name": "John",
//   "Age": 30
// }