refactor(): removed redundant files and small improvements

pkg/interceptor/logger.go

@@ -0,0 +1,73 @@
+package interceptor
+
+import (
+	"context"
+	"log"
+	"time"
+
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/status"
+)
+
+type LoggerInterceptor struct{}
+
+func NewLoggerInterceptor() *LoggerInterceptor {
+	return &LoggerInterceptor{}
+}
+
+func (i *LoggerInterceptor) Unary() grpc.UnaryServerInterceptor {
+	return func(
+		ctx context.Context,
+		req any,
+		info *grpc.UnaryServerInfo,
+		handler grpc.UnaryHandler,
+	) (any, error) {
+		start := time.Now()
+
+		log.Printf("gRPC method %s called", info.FullMethod)
+
+		resp, err := handler(ctx, req)
+
+		duration := time.Since(start)
+
+		if err != nil {
+			if st, ok := status.FromError(err); ok {
+				log.Printf("error: %s, code: %s, duration: %v",
+					st.Message(), st.Code(), duration)
+			} else {
+				log.Printf("error: %v, duration: %v", err, duration)
+			}
+		} else {
+			log.Printf("method %s completed in %v", info.FullMethod, duration)
+		}
+
+		return resp, err
+	}
+}
+
+func (i *LoggerInterceptor) Stream() grpc.StreamServerInterceptor {
+	return func(
+		srv any,
+		stream grpc.ServerStream,
+		info *grpc.StreamServerInfo,
+		handler grpc.StreamHandler,
+	) error {
+		start := time.Now()
+
+		log.Printf("gRPC stream method %s started", info.FullMethod)
+
+		err := handler(srv, stream)
+
+		duration := time.Since(start)
+
+		if err != nil {
+			log.Printf("stream method %s failed: %v, duration: %v",
+				info.FullMethod, err, duration)
+		} else {
+			log.Printf("stream method %s completed in %v",
+				info.FullMethod, duration)
+		}
+
+		return err
+	}
+}