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package logger
import (
"fmt"
"io"
"strings"
)
// DefaultWriter implementation
type DefaultWriter struct{}
// New creates a new writer
func NewDefaultWriter() *DefaultWriter {
return &DefaultWriter{}
}
// Write implements the logger.MessageWriter interface
func (kv DefaultWriter) Write(w io.Writer, m Message) {
prefix := fmt.Sprintf("%s [%-5s]", m.Time, strings.ToUpper(m.Level.String()))
io.WriteString(w, prefix)
if m.Name != "" {
io.WriteString(w, " ")
io.WriteString(w, m.Name)
io.WriteString(w, ":")
}
offset := len(m.Fields) % 2
if offset != 0 {
io.WriteString(w, writeKV("message", m.Fields[0]))
}
for i := offset; i < len(m.Fields); i = i + 2 {
io.WriteString(w, writeKV(m.Fields[i], m.Fields[i+1]))
}
}
func writeKV(k, v interface{}) string {
return fmt.Sprintf(
" %s=%s",
maybeQuote(ToString(k)),
maybeQuote(ToString(v)),
)
}
func maybeQuote(s string) string {
if strings.ContainsAny(s, " \t\n\r") {
return fmt.Sprintf("%q", s)
}
return s
}
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