Add zerolog implementation

logger/zerolog.go

@@ -0,0 +1,115 @@
+package logger
+
+import (
+	"github.com/9seconds/mtg/v2/mtglib"
+	"github.com/rs/zerolog"
+)
+
+const loggerFieldName = "logger"
+
+type zeroLogContextVarType uint8
+
+const (
+	zeroLogContextVarTypeUnknown zeroLogContextVarType = iota
+	zeroLogContextVarTypeStr
+	zeroLogContextVarTypeInt
+)
+
+type zeroLogContext struct {
+	name string
+	log  *zerolog.Logger
+
+	ctxVarType zeroLogContextVarType
+	ctxVarName string
+	ctxVarStr  string
+	ctxVarInt  int
+
+	parent *zeroLogContext
+}
+
+func (z *zeroLogContext) Named(name string) mtglib.Logger {
+	loggerName := z.name
+	if loggerName == "" {
+		loggerName = name
+	} else {
+		loggerName += "." + name
+	}
+
+	return &zeroLogContext{
+		name:   loggerName,
+		log:    z.log,
+		parent: z,
+	}
+}
+
+func (z *zeroLogContext) BindInt(name string, value int) mtglib.Logger {
+	return &zeroLogContext{
+		name:       z.name,
+		log:        z.log,
+		ctxVarType: zeroLogContextVarTypeInt,
+		ctxVarInt:  value,
+		ctxVarName: name,
+		parent:     z,
+	}
+}
+
+func (z *zeroLogContext) BindStr(name, value string) mtglib.Logger {
+	return &zeroLogContext{
+		name:       z.name,
+		log:        z.log,
+		ctxVarType: zeroLogContextVarTypeStr,
+		ctxVarStr:  value,
+		ctxVarName: name,
+		parent:     z,
+	}
+}
+
+func (z *zeroLogContext) Info(msg string) {
+	z.InfoError(msg, nil)
+}
+
+func (z *zeroLogContext) Warning(msg string) {
+	z.WarningError(msg, nil)
+}
+
+func (z *zeroLogContext) Debug(msg string) {
+	z.DebugError(msg, nil)
+}
+
+func (z *zeroLogContext) InfoError(msg string, err error) {
+	z.emitLog(z.log.Info(), msg, err)
+}
+
+func (z *zeroLogContext) WarningError(msg string, err error) {
+	z.emitLog(z.log.Warn(), msg, err)
+}
+
+func (z *zeroLogContext) DebugError(msg string, err error) {
+	z.emitLog(z.log.Debug(), msg, err)
+}
+
+func (z *zeroLogContext) emitLog(evt *zerolog.Event, msg string, err error) {
+	z.attachCtx(evt)
+
+	for current := z.parent; current != nil; current = current.parent {
+		current.attachCtx(evt)
+	}
+
+	evt.Str(loggerFieldName, z.name).Err(err).Msg(msg)
+}
+
+func (z *zeroLogContext) attachCtx(evt *zerolog.Event) {
+	switch z.ctxVarType {
+	case zeroLogContextVarTypeStr:
+		evt.Str(z.ctxVarName, z.ctxVarStr)
+	case zeroLogContextVarTypeInt:
+		evt.Int(z.ctxVarName, z.ctxVarInt)
+	case zeroLogContextVarTypeUnknown:
+	}
+}
+
+func NewZeroLogger(log zerolog.Logger) mtglib.Logger {
+	return &zeroLogContext{
+		log: &log,
+	}
+}