1 files changed, 66 insertions, 0 deletions
diff --git a/plugins/logger/encoder.go b/plugins/logger/encoder.go
new file mode 100644
index 00000000..66cd84f1
--- /dev/null
+++ b/plugins/logger/encoder.go
@@ -0,0 +1,66 @@
+package logger
+
+import (
+	"hash/fnv"
+	"strings"
+	"time"
+
+	"github.com/fatih/color"
+	"go.uber.org/zap/zapcore"
+)
+
+var colorMap = []func(string, ...interface{}) string{
+	color.HiYellowString,
+	color.HiGreenString,
+	color.HiBlueString,
+	color.HiRedString,
+	color.HiCyanString,
+	color.HiMagentaString,
+}
+
+// ColoredLevelEncoder colorizes log levels.
+func ColoredLevelEncoder(level zapcore.Level, enc zapcore.PrimitiveArrayEncoder) {
+	switch level {
+	case zapcore.DebugLevel:
+		enc.AppendString(color.HiWhiteString(level.CapitalString()))
+	case zapcore.InfoLevel:
+		enc.AppendString(color.HiCyanString(level.CapitalString()))
+	case zapcore.WarnLevel:
+		enc.AppendString(color.HiYellowString(level.CapitalString()))
+	case zapcore.ErrorLevel, zapcore.DPanicLevel:
+		enc.AppendString(color.HiRedString(level.CapitalString()))
+	case zapcore.PanicLevel, zapcore.FatalLevel:
+		enc.AppendString(color.HiMagentaString(level.CapitalString()))
+	}
+}
+
+// ColoredNameEncoder colorizes service names.
+func ColoredNameEncoder(s string, enc zapcore.PrimitiveArrayEncoder) {
+	if len(s) < 12 {
+		s += strings.Repeat(" ", 12-len(s))
+	}
+
+	enc.AppendString(color.HiGreenString(s))
+}
+
+// ColoredHashedNameEncoder colorizes service names and assigns different colors to different names.
+func ColoredHashedNameEncoder(s string, enc zapcore.PrimitiveArrayEncoder) {
+	if len(s) < 12 {
+		s += strings.Repeat(" ", 12-len(s))
+	}
+
+	colorID := stringHash(s, len(colorMap))
+	enc.AppendString(colorMap[colorID](s))
+}
+
+// UTCTimeEncoder encodes time into short UTC specific timestamp.
+func UTCTimeEncoder(t time.Time, enc zapcore.PrimitiveArrayEncoder) {
+	enc.AppendString(t.UTC().Format("2006/01/02 15:04:05"))
+}
+
+// returns string hash
+func stringHash(name string, base int) int {
+	h := fnv.New32a()
+	h.Write([]byte(name))
+	return int(h.Sum32()) % base
+}