add tickets api

internal/repos/tickets_repo/repo.go

@@ -0,0 +1,39 @@
+package tickets_repo
+
+import (
+	"context"
+
+	"github.com/jackc/pgx/v5/pgxpool"
+)
+
+type Repo struct {
+	pool *pgxpool.Pool
+}
+
+func New(pool *pgxpool.Pool) *Repo {
+	return &Repo{pool: pool}
+}
+
+func (r *Repo) CreateBatch(ctx context.Context, gameID int, tokenHashes [][]byte) ([]int, error) {
+	tx, err := r.pool.Begin(ctx)
+	if err != nil {
+		return nil, err
+	}
+	defer tx.Rollback(ctx)
+
+	ids := make([]int, 0, len(tokenHashes))
+	for _, tokenHash := range tokenHashes {
+		var id int
+		if err := tx.QueryRow(ctx,
+			`INSERT INTO tickets (game_id, token_hash) VALUES ($1, $2) RETURNING id`,
+			gameID, tokenHash,
+		).Scan(&id); err != nil {
+			return nil, err
+		}
+		ids = append(ids, id)
+	}
+	if err := tx.Commit(ctx); err != nil {
+		return nil, err
+	}
+	return ids, nil
+}