feat: added API gateway

internal/gw/grpc_client/submission_client.go

@@ -0,0 +1,85 @@
+package grpc_client
+
+import (
+	"context"
+	"fmt"
+
+	pb "datarush/pkg/api/submission"
+
+	"google.golang.org/grpc"
+)
+
+type SubmissionClient struct {
+	client pb.SubmissionServiceClient
+	conn   *grpc.ClientConn
+}
+
+func NewSubmissionClient(ctx context.Context, address string, factory *ClientFactory) (*SubmissionClient, error) {
+	conn, err := factory.GetConnection(ctx, address)
+	if err != nil {
+		return nil, fmt.Errorf("failed to create submission client: %w", err)
+	}
+
+	return &SubmissionClient{
+		client: pb.NewSubmissionServiceClient(conn),
+		conn:   conn,
+	}, nil
+}
+
+func (c *SubmissionClient) SubmitTask(
+	ctx context.Context,
+	userID, competitionID, taskID, fileURL string,
+) (*pb.Submission, error) {
+	req := &pb.SubmitTaskRequest{
+		UserId:        userID,
+		CompetitionId: competitionID,
+		TaskId:        taskID,
+		FileUrl:       fileURL,
+	}
+
+	resp, err := c.client.SubmitTask(ctx, req)
+	if err != nil {
+		return nil, fmt.Errorf("submit task failed: %w", err)
+	}
+	return resp, nil
+}
+
+func (c *SubmissionClient) GetSubmissionsHistory(
+	ctx context.Context,
+	userID, competitionID, taskID string,
+) ([]*pb.Submission, error) {
+	req := &pb.GetSubmissionsHistoryRequest{
+		UserId:        userID,
+		CompetitionId: competitionID,
+		TaskId:        taskID,
+	}
+
+	resp, err := c.client.GetSubmissionsHistory(ctx, req)
+	if err != nil {
+		return nil, fmt.Errorf("get submissions history failed: %w", err)
+	}
+	return resp.Submissions, nil
+}
+
+func (c *SubmissionClient) GetSubmission(ctx context.Context, submissionID string) (*pb.Submission, error) {
+	req := &pb.GetSubmissionRequest{
+		SubmissionId: submissionID,
+	}
+
+	resp, err := c.client.GetSubmission(ctx, req)
+	if err != nil {
+		return nil, fmt.Errorf("get submission failed: %w", err)
+	}
+	return resp, nil
+}
+
+func (c *SubmissionClient) ListSubmissions(
+	ctx context.Context,
+	req *pb.ListSubmissionsRequest,
+) (*pb.ListSubmissionsResponse, error) {
+	resp, err := c.client.ListSubmissions(ctx, req)
+	if err != nil {
+		return nil, fmt.Errorf("list submissions failed: %w", err)
+	}
+	return resp, nil
+}