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mirror of https://github.com/OpenDiablo2/OpenDiablo2 synced 2024-11-02 17:27:23 -04:00
OpenDiablo2/d2common/d2util/logger.go
lord 28a40983ad
move logger into d2util (#720)
* moved logger into d2util

* resolved upstream conflict
2020-09-09 08:22:13 -04:00

102 lines
1.7 KiB
Go

package d2util
import (
"fmt"
"io"
)
// LogLevel determines how verbose the logging is (higher is more verbose)
type LogLevel int
// Log levels
const (
LogLevelNone LogLevel = iota
LogLevelError
LogLevelWarning
LogLevelInfo
LogLevelDebug
)
// Log format strings for log levels
const (
LogFmtDebug = "[DEBUG] %s\n\r"
LogFmtInfo = "[INFO] %s\n\r"
LogFmtWarning = "[WARNING] %s\n\r"
LogFmtError = "[ERROR] %s\n\r"
)
// Logger is used to write log messages, and can have a log level to determine verbosity
type Logger struct {
io.Writer
level LogLevel
}
// SetLevel sets the log level
func (l *Logger) SetLevel(level LogLevel) {
l.level = level
}
// Debug logs a debug message
func (l *Logger) Debug(msg string) {
if l == nil {
return
}
l.print(LogLevelDebug, msg)
}
// Info logs an info message
func (l *Logger) Info(msg string) {
if l == nil {
return
}
l.print(LogLevelInfo, msg)
}
// Warning logs a warning message
func (l *Logger) Warning(msg string) {
if l == nil {
return
}
l.print(LogLevelWarning, msg)
}
// Error logs an error message
func (l *Logger) Error(msg string) {
if l == nil {
return
}
l.print(LogLevelError, msg)
}
func (l *Logger) print(level LogLevel, msg string) {
if l == nil || l.level < level {
return
}
fmtString := ""
switch level {
case LogLevelDebug:
fmtString = LogFmtDebug
case LogLevelInfo:
fmtString = LogFmtInfo
case LogLevelWarning:
fmtString = LogFmtWarning
case LogLevelError:
fmtString = LogFmtError
case LogLevelNone:
default:
return
}
_, _ = l.Write(format(fmtString, []byte(msg)))
}
func format(fmtStr string, fmtInput []byte) []byte {
return []byte(fmt.Sprintf(fmtStr, string(fmtInput)))
}