/
handler.go
65 lines (56 loc) · 1.37 KB
/
handler.go
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// Package logx contains logging extensions
package logx
import (
"fmt"
"io"
"os"
"time"
"github.com/apex/log"
)
// Handler implements github.com/apex/log.Handler.
type Handler struct {
// Emoji is OPTIONAL and indicates whether to enable emojis.
Emoji bool
// Now is the MANDATORY function to compute the current time.
Now func() time.Time
// StartTime is MANDATORY and indicates when we started logging.
StartTime time.Time
// Writer is MANDATORY and is the underlying writer.
io.Writer
}
// NewHandlerWithDefaultSettings creates a new Handler with default settings.
func NewHandlerWithDefaultSettings() *Handler {
return &Handler{
Emoji: false,
Now: time.Now,
StartTime: time.Now(),
Writer: os.Stderr,
}
}
var _ log.Handler = &Handler{}
// HandleLog implements log.Handler
func (h *Handler) HandleLog(e *log.Entry) (err error) {
level := fmt.Sprintf("<%s>", e.Level.String())
if h.Emoji {
switch e.Level {
case log.DebugLevel:
level = "🧐"
case log.InfoLevel:
level = " "
case log.WarnLevel:
level = "🔥"
case log.FatalLevel:
level = "🚨"
default:
// keep the original string
}
}
elapsed := h.Now().Sub(h.StartTime)
s := fmt.Sprintf("[%14.6f] %s %s", elapsed.Seconds(), level, e.Message)
if len(e.Fields) > 0 {
s += fmt.Sprintf(": %+v", e.Fields)
}
s += "\n"
_, err = h.Writer.Write([]byte(s))
return
}