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server.go
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server.go
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package internalgrpc
import (
"context"
"errors"
"fmt"
"net"
"net/http"
"time"
pb "github.com/Feride3d/banner-rotation-service/internal/pb/api/rotator"
"github.com/Feride3d/banner-rotation-service/internal/service"
"github.com/google/uuid"
grpc_middleware "github.com/grpc-ecosystem/go-grpc-middleware"
grpc_logrus "github.com/grpc-ecosystem/go-grpc-middleware/logging/logrus"
"github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
"google.golang.org/grpc"
)
type HttpServer struct {
service service.Service
httpserver *http.Server
}
type grpcServer struct {
pb.UnimplementedRotatorServer
service service.Service
}
func NewHttpServer(service *service.Service, addr string, port string, grpcPort string) (*HttpServer, error) {
grpcEndpoint := net.JoinHostPort(addr, grpcPort)
l, err := net.Listen("tcp", grpcEndpoint)
if err != nil {
return nil, fmt.Errorf("failed to start server %w", err)
}
log := service.LoggerBegin().Entry()
srv := grpc.NewServer(grpc.StreamInterceptor(grpc_middleware.ChainStreamServer(
grpc_logrus.StreamServerInterceptor(log),
)),
grpc.UnaryInterceptor(grpc_middleware.ChainUnaryServer(
grpc_logrus.UnaryServerInterceptor(log),
)))
pb.RegisterRotatorServer(srv, &grpcServer{service: *service})
go func() {
err := srv.Serve(l)
if err != nil {
service.LoggerBegin().Error(fmt.Errorf("failed to serve grpc server, %w", err).Error())
}
}()
ctx, cncl := context.WithTimeout(context.Background(), 10*time.Second)
defer cncl()
conn, err := grpc.DialContext(
ctx,
grpcEndpoint,
grpc.WithBlock(),
)
if err != nil {
return nil, fmt.Errorf("failed to start grpc server, %w", err)
}
// Register service's handler
mux := runtime.NewServeMux()
err = pb.RegisterRotatorHandler(ctx, mux, conn)
if err != nil {
return nil, fmt.Errorf("failed to register endpoints, %w", err)
}
httpserver := &http.Server{
Addr: net.JoinHostPort(addr, port),
Handler: mux,
ReadTimeout: 10 * time.Second,
WriteTimeout: 10 * time.Second,
}
return &HttpServer{*service, httpserver}, nil
}
func (s *HttpServer) Start(ctx context.Context) error {
err := s.httpserver.ListenAndServe()
if err != nil {
if errors.Is(err, http.ErrServerClosed) {
return nil
}
return fmt.Errorf("failed to start http server, %w", err)
}
return nil
}
func (s *HttpServer) Stop(ctx context.Context) error {
if err := s.httpserver.Shutdown(ctx); err != nil {
return fmt.Errorf("failed to stop http server, %w", err)
}
return nil
}
// CreateBanner creates a new banner.
func (s *grpcServer) CreateBanner(ctx context.Context, req *pb.CreateBannerRequest) (*pb.CreateBannerResponse, error) {
if ctx.Err() != nil {
return nil, errors.New("CreateBanner request is cancelled")
}
bannerID := req.Id
if bannerID == "" {
bannerID = uuid.NewString()
}
bannerID, err := s.service.CreateBanner(ctx, bannerID, req.Description)
if err != nil {
return nil, errors.New("CreateBanner request is failed")
}
return &pb.CreateBannerResponse{
Id: bannerID}, nil
}
// CreateSlot creates a new slot.
func (s *grpcServer) CreateSlot(ctx context.Context, req *pb.CreateSlotRequest) (*pb.CreateSlotResponse, error) {
if ctx.Err() != nil {
return nil, errors.New("CreateSlot request is cancelled")
}
slotID := req.Id
if slotID == "" {
slotID = uuid.NewString()
}
slotID, err := s.service.CreateSlot(ctx, slotID, req.Description)
if err != nil {
return nil, errors.New("CreateSlot request is failed")
}
return &pb.CreateSlotResponse{
Id: slotID}, nil
}
// CreateGroup creates a new group.
func (s *grpcServer) CreateGroup(ctx context.Context, req *pb.CreateGroupRequest) (*pb.CreateGroupResponse, error) {
if ctx.Err() != nil {
return nil, errors.New("CreateGroup request is cancelled")
}
groupID := req.Id
if groupID == "" {
groupID = uuid.NewString()
}
groupID, err := s.service.CreateGroup(ctx, groupID, req.Description)
if err != nil {
return nil, errors.New("CreateGroup request is failed")
}
return &pb.CreateGroupResponse{
Id: groupID}, nil
}
// AddBanner adds the banner to the slot.
func (s *grpcServer) AddBanner(ctx context.Context, req *pb.AddBannerRequest) (*pb.AddBannerResponse, error) {
if ctx.Err() != nil {
return nil, errors.New("addBanner request is cancelled")
}
if req.BannerId == "" || req.SlotId == "" {
return nil, errors.New("process request: no banners or slots to add")
}
err := s.service.AddBanner(ctx, req.BannerId, req.SlotId)
if err != nil {
return nil, errors.New("addBanner request is failed")
}
return &pb.AddBannerResponse{
Status: "ok, banner was added to slot"}, nil
}
// DeleteBanner deletes the banner from the slot.
func (s *grpcServer) DeleteBanner(ctx context.Context, req *pb.DeleteBannerRequest) (*pb.DeleteBannerResponse, error) {
if ctx.Err() != nil {
return nil, errors.New("deleteBanner request is cancelled")
}
if req.BannerId == "" || req.SlotId == "" {
return nil, errors.New("process request: no banners to delete")
}
err := s.service.DeleteBanner(ctx, req.BannerId, req.SlotId)
if err != nil {
return nil, errors.New("deleteBanner request is failed")
}
return &pb.DeleteBannerResponse{
Status: "ok, banner was deleted"}, nil
}
// AddClick adds a click on the banner.
func (s *grpcServer) AddClick(ctx context.Context, req *pb.AddClickRequest) (*pb.AddClickResponse, error) {
if ctx.Err() != nil {
return nil, errors.New("AddClick request is cancelled")
}
if req.BannerId == "" || req.SlotId == "" || req.GroupId == "" {
return nil, errors.New("no banners or slots or groups or group to click")
}
err := s.service.AddClick(ctx, req.BannerId, req.SlotId, req.GroupId)
if err != nil {
return nil, errors.New("addClick request is failed")
}
return &pb.AddClickResponse{
Status: "ok, click on banner was added"}, nil
}
// AddBannerDisplay adds a banner to display.
func (s *grpcServer) AddBannerDisplay(ctx context.Context, req *pb.AddBannerDisplayRequest) (*pb.AddBannerDisplayResponse, error) {
if ctx.Err() != nil {
return nil, errors.New("AddBannerDisplay request is cancelled")
}
if req.SlotId == "" || req.GroupId == "" {
return nil, errors.New("no slot or group for banner's display")
}
bannerID, err := s.service.AddBannerDisplay(ctx, req.SlotId, req.GroupId)
if err != nil {
return nil, errors.New("addBannerDisplay request is failed")
}
return &pb.AddBannerDisplayResponse{
Id: bannerID}, nil
}