feat: implement async modpack import with websockets

internal/database/job_repository.go

@@ -0,0 +1,58 @@
+package database
+
+import (
+	"context"
+
+	"gitea.mrixs.me/minecraft-platform/backend/internal/models"
+	"github.com/jackc/pgx/v5"
+	"github.com/jackc/pgx/v5/pgxpool"
+)
+
+type JobRepository struct {
+	DB *pgxpool.Pool
+}
+
+// CreateJob создает новую задачу со статусом pending
+func (r *JobRepository) CreateJob(ctx context.Context) (int, error) {
+	var jobID int
+	query := `INSERT INTO modpack_import_jobs (status, progress, created_at, updated_at) 
+	          VALUES ($1, $2, NOW(), NOW()) RETURNING id`
+
+	err := r.DB.QueryRow(ctx, query, models.JobStatusPending, 0).Scan(&jobID)
+	return jobID, err
+}
+
+// UpdateJobStatus обновляет статус и прогресс задачи
+func (r *JobRepository) UpdateJobStatus(ctx context.Context, jobID int, status models.ImportJobStatus, progress int, errorMessage string) error {
+	query := `UPDATE modpack_import_jobs 
+	          SET status = $1, progress = $2, error_message = $3, updated_at = NOW() 
+	          WHERE id = $4`
+
+	_, err := r.DB.Exec(ctx, query, status, progress, errorMessage, jobID)
+	return err
+}
+
+// GetJob получает задачу по ID
+func (r *JobRepository) GetJob(ctx context.Context, jobID int) (*models.ImportJob, error) {
+	job := &models.ImportJob{}
+	query := `SELECT id, status, progress, error_message, created_at, updated_at 
+	          FROM modpack_import_jobs WHERE id = $1`
+
+	var errMsg *string // Для обработки NULL
+	err := r.DB.QueryRow(ctx, query, jobID).Scan(
+		&job.ID, &job.Status, &job.Progress, &errMsg, &job.CreatedAt, &job.UpdatedAt,
+	)
+
+	if err != nil {
+		if err == pgx.ErrNoRows {
+			return nil, nil // Или спец ошибка
+		}
+		return nil, err
+	}
+
+	if errMsg != nil {
+		job.ErrorMessage = *errMsg
+	}
+
+	return job, nil
+}