[#26] *: Move pkg content to root

Signed-off-by: Angira Kekteeva <kira@nspcc.ru>

logger/grpc.go

@@ -0,0 +1,78 @@
+package logger
+
+import (
+	"go.uber.org/zap"
+	"go.uber.org/zap/zapcore"
+	"google.golang.org/grpc/grpclog"
+)
+
+type (
+	zapLogger struct {
+		zapcore.Core
+		log *zap.SugaredLogger
+	}
+
+	// Logger includes grpclog.LoggerV2 interface with an additional
+	// Println method.
+	Logger interface {
+		grpclog.LoggerV2
+		Println(v ...interface{})
+	}
+)
+
+// GRPC wraps given zap.Logger into grpclog.LoggerV2+ interface.
+func GRPC(l *zap.Logger) Logger {
+	log := l.WithOptions(
+		// skip gRPCLog + zapLogger in caller
+		zap.AddCallerSkip(2))
+
+	return &zapLogger{
+		Core: log.Core(),
+		log:  log.Sugar(),
+	}
+}
+
+// Info implements grpclog.LoggerV2.
+func (z *zapLogger) Info(args ...interface{}) { z.log.Info(args...) }
+
+// Infoln implements grpclog.LoggerV2.
+func (z *zapLogger) Infoln(args ...interface{}) { z.log.Info(args...) }
+
+// Infof implements grpclog.LoggerV2.
+func (z *zapLogger) Infof(format string, args ...interface{}) { z.log.Infof(format, args...) }
+
+// Println allows to print a line with info severity.
+func (z *zapLogger) Println(args ...interface{}) { z.log.Info(args...) }
+
+// Printf implements grpclog.LoggerV2.
+func (z *zapLogger) Printf(format string, args ...interface{}) { z.log.Infof(format, args...) }
+
+// Warning implements grpclog.LoggerV2.
+func (z *zapLogger) Warning(args ...interface{}) { z.log.Warn(args...) }
+
+// Warningln implements grpclog.LoggerV2.
+func (z *zapLogger) Warningln(args ...interface{}) { z.log.Warn(args...) }
+
+// Warningf implements grpclog.LoggerV2.
+func (z *zapLogger) Warningf(format string, args ...interface{}) { z.log.Warnf(format, args...) }
+
+// Error implements grpclog.LoggerV2.
+func (z *zapLogger) Error(args ...interface{}) { z.log.Error(args...) }
+
+// Errorln implements grpclog.LoggerV2.
+func (z *zapLogger) Errorln(args ...interface{}) { z.log.Error(args...) }
+
+// Errorf implements grpclog.LoggerV2.
+func (z *zapLogger) Errorf(format string, args ...interface{}) { z.log.Errorf(format, args...) }
+
+// Fatal implements grpclog.LoggerV2.
+func (z *zapLogger) Fatal(args ...interface{}) { z.log.Fatal(args...) }
+
+// Fatalln implements grpclog.LoggerV2.
+func (z *zapLogger) Fatalln(args ...interface{}) { z.log.Fatal(args...) }
+
+// Fatalf implements grpclog.LoggerV2.
+func (z *zapLogger) Fatalf(format string, args ...interface{}) { z.log.Fatalf(format, args...) }
+
+// V implements grpclog.LoggerV2.
+func (z *zapLogger) V(int) bool { return z.Enabled(zapcore.DebugLevel) }