SNekLog/io.go

package sneklog

import (
	"fmt"
	"os"
)

// Infof logs a formatted info message.
func (l *Logger) Infof(format string, args ...any) {
	l.Print(INFO, fmt.Sprintf(format, args...))
}

// Info logs an info message.
func (l *Logger) Info(m ...any) {
	l.Print(INFO, m...)
}

// Infoln logs an info message and appends a newline semantic for writers that need it.
func (l *Logger) Infoln(m ...any) {
	l.Println(INFO, m...)
}

// Warnf logs a formatted warning message.
func (l *Logger) Warnf(format string, args ...any) {
	l.Print(WARN, fmt.Sprintf(format, args...))
}

// Warn logs a warning message.
func (l *Logger) Warn(m ...any) {
	l.Print(WARN, m...)
}

// Warnln logs a warning message with newline semantic.
func (l *Logger) Warnln(m ...any) {
	l.Println(WARN, m...)
}

// Errorf logs a formatted error message.
func (l *Logger) Errorf(format string, args ...any) {
	l.Print(ERROR, fmt.Sprintf(format, args...))
}

// Error logs an error message.
func (l *Logger) Error(m ...any) {
	l.Print(ERROR, m...)
}

// Errorln logs an error message with newline semantic.
func (l *Logger) Errorln(m ...any) {
	l.Println(ERROR, m...)
}

// Fatalf logs a formatted fatal message and exits the process with code 1.
func (l *Logger) Fatalf(format string, args ...any) {
	l.Print(FATAL, fmt.Sprintf(format, args...))
	os.Exit(1)
}

// Fatal logs a fatal message and exits the process with code 1.
func (l *Logger) Fatal(m ...any) {
	l.Print(FATAL, m...)
	os.Exit(1)
}

// Fatalln logs a fatal message with newline semantic and exits the process with code 1.
func (l *Logger) Fatalln(m ...any) {
	l.Println(FATAL, m...)
	os.Exit(1)
}

// Debugf logs a formatted debug message.
func (l *Logger) Debugf(format string, args ...any) {
	l.Print(DEBUG, fmt.Sprintf(format, args...))
}

// Debug logs a debug message.
func (l *Logger) Debug(m ...any) {
	l.Print(DEBUG, m...)
}

// Debugln logs a debug message with newline semantic.
func (l *Logger) Debugln(m ...any) {
	l.Println(DEBUG, m...)
}

func (l *Logger) print(level LogLevel, newline bool, m ...any) {
	if l.threshold && l.level.th < level.th {
		return
	} else if l.level.n < level.n {
		return
	}
	if len(l.writers) == 0 {
		return
	}

	tb := getFullTraceback(1)
	messages := l.replaceAll(m...)
	if newline {
		messages = append(messages, any("\n"))
	}
	for _, writer := range l.writers {
		if writer == nil {
			continue
		}
		err := writer.Print(level, l.prefix, tb, messages...)
		if err != nil {
			l.reportWriterError(err)
		}
	}
}

// Print logs a message without appending a trailing newline semantic.
func (l *Logger) Print(level LogLevel, m ...any) { l.print(level, false, m...) }

// Println logs a message and appends a trailing newline semantic for writers that need it.
func (l *Logger) Println(level LogLevel, m ...any) { l.print(level, true, m...) }

// Printf formats according to a format specifier and logs the resulting message.
func (l *Logger) Printf(level LogLevel, format string, args ...any) {
	l.print(level, false, fmt.Sprintf(format, args...))
}

// reportWriterError writes internal writer failures directly to stderr to avoid
// re-entering the same logger path that just failed.
func (l *Logger) reportWriterError(err error) {
	if err == nil {
		return
	}
	_, _ = fmt.Fprintf(os.Stderr, "[%s] logger writer error: %v\n", l.prefix, err)
}