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beaver/level.go

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package beaver
import (
"fmt"
"strings"
"time"
"go.jolheiser.com/beaver/color"
)
var bold = color.New(color.Bold)
// Level defines a Beaver logging level
type Level int
const (
TRACE Level = iota
DEBUG
INFO
WARN
ERROR
FATAL
)
// String returns a human-friendly string
func (l Level) String() string {
switch l {
case TRACE:
return "Trace"
case DEBUG:
return "Debug"
case INFO:
return "Info"
case WARN:
return "Warn"
case ERROR:
return "Error"
case FATAL:
return "Fatal"
default:
return "N/A"
}
}
// Prefix returns a prefix for a logging level, optionally colored
func (l Level) Prefix() string {
var letter string
switch l {
case TRACE:
letter = "T"
case DEBUG:
letter = "D"
case INFO:
letter = "I"
case WARN:
letter = "W"
case ERROR:
letter = "E"
case FATAL:
letter = "F"
}
return fmt.Sprintf("[%s]", letter)
}
// Color returns a Level's color, defaulting to bold
func (l Level) Color() *color.Color {
switch l {
case TRACE:
return color.Trace
case DEBUG:
return color.Debug
case INFO:
return color.Info
case WARN:
return color.Warn
case ERROR:
return color.Error
case FATAL:
return color.Fatal
default:
return bold
}
}
// Levels returns a list of Beaver logging levels
func Levels() []Level {
return []Level{TRACE, DEBUG, INFO, WARN, ERROR, FATAL}
}
// ParseLevel parses a string and returns a Beaver Level, defaulting to Info
func ParseLevel(level string) Level {
switch strings.ToUpper(level) {
case "T", "TRACE":
return TRACE
case "D", "DEBUG":
return DEBUG
case "I", "INFO":
return INFO
case "W", "WARN":
return WARN
case "E", "ERROR":
return ERROR
case "F", "FATAL":
return FATAL
}
return INFO
}
func timePrefix(t time.Time) string {
var buf = &[]byte{}
year, month, day := t.Date()
itoa(buf, int(month), 2)
*buf = append(*buf, '/')
itoa(buf, day, 2)
*buf = append(*buf, '/')
itoa(buf, year, 4)
*buf = append(*buf, ' ')
hour, min, sec := t.Clock()
itoa(buf, hour, 2)
*buf = append(*buf, ':')
itoa(buf, min, 2)
*buf = append(*buf, ':')
itoa(buf, sec, 2)
return string(*buf)
}
func itoa(buf *[]byte, i int, wid int) {
var b [20]byte
bp := len(b) - 1
for i >= 10 || wid > 1 {
wid--
q := i / 10
b[bp] = byte('0' + i - q*10)
bp--
i = q
}
// i < 10
b[bp] = byte('0' + i)
*buf = append(*buf, b[bp:]...)
}