78 lines
1.4 KiB
Go
78 lines
1.4 KiB
Go
package logger
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import (
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"encoding/json"
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"fmt"
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"io"
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"strings"
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"time"
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)
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type Formatter interface {
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Format(writer io.Writer, entry *Entry)
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}
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type textFormatter struct {
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timeFormat string
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prefix string
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}
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type jsonFormatter struct{}
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func newFormatter(format Format) Formatter {
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switch format {
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case JSON:
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return &jsonFormatter{}
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default:
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return &textFormatter{
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timeFormat: "2006-01-02 15:04:05",
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}
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}
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}
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func (f *textFormatter) Format(writer io.Writer, entry *Entry) {
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parts := make([]string, 0, 8)
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parts = append(parts, entry.Time.Format(f.timeFormat))
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parts = append(parts, entry.Level.String())
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if f.prefix != "" {
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parts = append(parts, "["+f.prefix+"]")
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}
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if entry.Caller != "" {
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parts = append(parts, entry.Caller)
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}
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parts = append(parts, entry.Message)
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if len(entry.Fields) > 0 {
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fieldStrs := make([]string, 0, len(entry.Fields))
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for k, v := range entry.Fields {
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fieldStrs = append(fieldStrs, fmt.Sprintf("%s=%v", k, v))
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}
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parts = append(parts, strings.Join(fieldStrs, " "))
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}
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fmt.Fprintln(writer, strings.Join(parts, " "))
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}
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func (f *jsonFormatter) Format(writer io.Writer, entry *Entry) {
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m := map[string]interface{}{
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"time": entry.Time.Format(time.RFC3339),
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"level": entry.Level.String(),
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"message": entry.Message,
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}
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if entry.Caller != "" {
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m["caller"] = entry.Caller
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}
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for k, v := range entry.Fields {
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m[k] = v
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}
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data, _ := json.Marshal(m)
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writer.Write(data)
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writer.Write([]byte("\n"))
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}
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