feat: added API gateway

internal/gw/grpc_client/results_client.go

@@ -0,0 +1,58 @@
+package grpc_client
+
+import (
+	"context"
+	"fmt"
+
+	pb "datarush/pkg/api/results"
+
+	"google.golang.org/grpc"
+)
+
+type ResultsClient struct {
+	client pb.ResultsServiceClient
+	conn   *grpc.ClientConn
+}
+
+func NewResultsClient(ctx context.Context, address string, factory *ClientFactory) (*ResultsClient, error) {
+	conn, err := factory.GetConnection(ctx, address)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create results client: %w", err)
+	}
+	return &ResultsClient{client: pb.NewResultsServiceClient(conn), conn: conn}, nil
+}
+
+func (c *ResultsClient) GetCompetitionResults(
+	ctx context.Context,
+	req *pb.GetCompetitionResultsRequest,
+) (*pb.GetCompetitionResultsResponse, error) {
+	resp, err := c.client.GetCompetitionResults(ctx, req)
+	if err != nil {
+		return nil, fmt.Errorf("get competition results failed: %w", err)
+	}
+	return resp, nil
+}
+
+func (c *ResultsClient) GetUserCompetitionResults(
+	ctx context.Context,
+	competitionID, userID string,
+) (*pb.UserResult, error) {
+	req := &pb.GetUserCompetitionResultsRequest{
+		CompetitionId: competitionID,
+		UserId:        userID,
+	}
+	resp, err := c.client.GetUserCompetitionResults(ctx, req)
+	if err != nil {
+		return nil, fmt.Errorf("get user competition results failed: %w", err)
+	}
+	return resp.Result, nil
+}
+
+func (c *ResultsClient) RecalculateResults(ctx context.Context, competitionID string) error {
+	req := &pb.RecalculateResultsRequest{CompetitionId: competitionID}
+	_, err := c.client.RecalculateResults(ctx, req)
+	if err != nil {
+		return fmt.Errorf("recalculate results failed: %w", err)
+	}
+	return nil
+}