/
subscription_handler.go
168 lines (144 loc) · 5.78 KB
/
subscription_handler.go
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package grpc
import (
"context"
"database/sql"
"github.com/golang/protobuf/ptypes/empty"
"google.golang.org/grpc/codes"
"google.golang.org/grpc/status"
"google.golang.org/protobuf/types/known/timestamppb"
"github.com/allisson/hammer"
pb "github.com/allisson/hammer/api/v1"
)
// SubscriptionHandler implements methods for topic create/update
type SubscriptionHandler struct {
subscriptionService hammer.SubscriptionService
}
func (s SubscriptionHandler) buildResponse(subscription *hammer.Subscription) *pb.Subscription {
response := &pb.Subscription{}
response.Id = subscription.ID
response.TopicId = subscription.TopicID
response.Name = subscription.Name
response.Url = subscription.URL
response.SecretToken = subscription.SecretToken
response.MaxDeliveryAttempts = uint32(subscription.MaxDeliveryAttempts)
response.DeliveryAttemptDelay = uint32(subscription.DeliveryAttemptDelay)
response.DeliveryAttemptTimeout = uint32(subscription.DeliveryAttemptTimeout)
response.CreatedAt = timestamppb.New(subscription.CreatedAt)
response.UpdatedAt = timestamppb.New(subscription.UpdatedAt)
return response
}
// CreateSubscription creates a new subscription
func (s SubscriptionHandler) CreateSubscription(ctx context.Context, request *pb.CreateSubscriptionRequest) (*pb.Subscription, error) {
if request.Subscription == nil {
request.Subscription = &pb.Subscription{}
}
// Build a subscription
subscription := &hammer.Subscription{
ID: request.Subscription.Id,
TopicID: request.Subscription.TopicId,
Name: request.Subscription.Name,
URL: request.Subscription.Url,
SecretToken: request.Subscription.SecretToken,
MaxDeliveryAttempts: int(request.Subscription.MaxDeliveryAttempts),
DeliveryAttemptDelay: int(request.Subscription.DeliveryAttemptDelay),
DeliveryAttemptTimeout: int(request.Subscription.DeliveryAttemptTimeout),
}
// Validate subscription
err := subscription.Validate()
if err != nil {
st := validationStatusError(codes.InvalidArgument, "invalid_subscription", err)
return &pb.Subscription{}, st.Err()
}
// Create subscription
err = s.subscriptionService.Create(ctx, subscription)
if err != nil {
return &pb.Subscription{}, status.Error(codes.Internal, err.Error())
}
response := s.buildResponse(subscription)
return response, nil
}
// UpdateSubscription update the subscription
func (s SubscriptionHandler) UpdateSubscription(ctx context.Context, request *pb.UpdateSubscriptionRequest) (*pb.Subscription, error) {
if request.Subscription == nil {
request.Subscription = &pb.Subscription{}
}
// Build a subscription
subscription := &hammer.Subscription{
ID: request.Subscription.Id,
TopicID: request.Subscription.TopicId,
Name: request.Subscription.Name,
URL: request.Subscription.Url,
SecretToken: request.Subscription.SecretToken,
MaxDeliveryAttempts: int(request.Subscription.MaxDeliveryAttempts),
DeliveryAttemptDelay: int(request.Subscription.DeliveryAttemptDelay),
DeliveryAttemptTimeout: int(request.Subscription.DeliveryAttemptTimeout),
}
// Validate subscription
err := subscription.Validate()
if err != nil {
return &pb.Subscription{}, status.Error(codes.InvalidArgument, "invalid_subscription")
}
// Update subscription
err = s.subscriptionService.Update(ctx, subscription)
if err != nil {
return &pb.Subscription{}, status.Error(codes.Internal, err.Error())
}
response := s.buildResponse(subscription)
return response, nil
}
// GetSubscription gets the subscription
func (s SubscriptionHandler) GetSubscription(ctx context.Context, request *pb.GetSubscriptionRequest) (*pb.Subscription, error) {
// Get subscription from service
subscription, err := s.subscriptionService.Find(ctx, request.Id)
if err != nil {
switch err {
case sql.ErrNoRows:
return &pb.Subscription{}, status.Error(codes.NotFound, hammer.ErrSubscriptionDoesNotExists.Error())
default:
return &pb.Subscription{}, status.Error(codes.Internal, err.Error())
}
}
response := s.buildResponse(subscription)
return response, nil
}
// ListSubscriptions get a list of topics
func (s SubscriptionHandler) ListSubscriptions(ctx context.Context, request *pb.ListSubscriptionsRequest) (*pb.ListSubscriptionsResponse, error) {
// Get limit and offset
limit, offset := parsePagination(request.Limit, request.Offset)
// Create response
response := &pb.ListSubscriptionsResponse{}
// Get subscriptions
findOptions := hammer.FindOptions{
FindPagination: &hammer.FindPagination{
Limit: limit,
Offset: offset,
},
}
createdAtFilters := createdAtFilters(request.CreatedAtGt, request.CreatedAtGte, request.CreatedAtLt, request.CreatedAtLte)
findOptions.FindFilters = append(findOptions.FindFilters, createdAtFilters...)
subscriptions, err := s.subscriptionService.FindAll(ctx, findOptions)
if err != nil {
return response, status.Error(codes.Internal, err.Error())
}
// Update response
for i := range subscriptions {
subscription := subscriptions[i]
subscriptionResponse := s.buildResponse(subscription)
response.Subscriptions = append(response.Subscriptions, subscriptionResponse)
}
return response, nil
}
// DeleteSubscription delete the subscription
func (s SubscriptionHandler) DeleteSubscription(ctx context.Context, request *pb.DeleteSubscriptionRequest) (*empty.Empty, error) {
response := &empty.Empty{}
// Delete topic
err := s.subscriptionService.Delete(ctx, request.Id)
if err != nil {
return response, status.Error(codes.Internal, err.Error())
}
return response, nil
}
// NewSubscriptionHandler returns a new Topic
func NewSubscriptionHandler(subscriptionService hammer.SubscriptionService) SubscriptionHandler {
return SubscriptionHandler{subscriptionService: subscriptionService}
}