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// Package text implements a development-friendly textual handler.
package text
import (
"fmt"
"io"
"os"
"sync"
"time"
"github.com/apex/log"
)
// Default handler outputting to stderr.
var Default = New(os.Stderr)
// start time.
var start = time.Now()
// colors.
const (
none = 0
red = 31
green = 32
yellow = 33
blue = 34
gray = 37
)
// Colors mapping.
var Colors = [...]int{
log.DebugLevel: gray,
log.InfoLevel: blue,
log.WarnLevel: yellow,
log.ErrorLevel: red,
log.FatalLevel: red,
}
// Strings mapping.
var Strings = [...]string{
log.DebugLevel: "DEBUG",
log.InfoLevel: "INFO",
log.WarnLevel: "WARN",
log.ErrorLevel: "ERROR",
log.FatalLevel: "FATAL",
}
// Handler implementation.
type Handler struct {
mu sync.Mutex
Writer io.Writer
}
// New handler.
func New(w io.Writer) *Handler {
return &Handler{
Writer: w,
}
}
// HandleLog implements log.Handler.
func (h *Handler) HandleLog(e *log.Entry) error {
color := Colors[e.Level]
level := Strings[e.Level]
names := e.Fields.Names()
h.mu.Lock()
defer h.mu.Unlock()
ts := time.Since(start) / time.Second
fmt.Fprintf(h.Writer, "\033[%dm%6s\033[0m[%04d] %-25s", color, level, ts, e.Message)
for _, name := range names {
fmt.Fprintf(h.Writer, " \033[%dm%s\033[0m=%v", color, name, e.Fields.Get(name))
}
fmt.Fprintln(h.Writer)
return nil
}
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