init: initial commit

services/api/internal/portfolio/repository/postgres.go

@@ -0,0 +1,99 @@
+package repository
+
+import (
+	"context"
+	"errors"
+	"veyra/services/api/internal/platform/apperror"
+
+	"github.com/jackc/pgx/v5"
+	"github.com/jackc/pgx/v5/pgconn"
+	"github.com/jackc/pgx/v5/pgxpool"
+	"veyra/services/api/internal/portfolio/domain"
+)
+
+type Postgres struct{ pool *pgxpool.Pool }
+
+func NewPostgres(pool *pgxpool.Pool) *Postgres { return &Postgres{pool: pool} }
+
+func (r *Postgres) Create(ctx context.Context, a domain.Account, entry *domain.CashEntry) (domain.AccountSummary, error) {
+	tx, err := r.pool.Begin(ctx)
+	if err != nil {
+		return domain.AccountSummary{}, apperror.ErrUnavailable
+	}
+	defer tx.Rollback(context.Background())
+	// Lock the owner so account creation cannot race with disabling the user.
+	var status string
+	if err := tx.QueryRow(ctx, `SELECT status FROM veyra_user WHERE id=$1 AND role='USER' FOR UPDATE`, a.UserID).Scan(&status); err != nil {
+		return domain.AccountSummary{}, mapError(err)
+	}
+	if status != "ACTIVE" {
+		return domain.AccountSummary{}, apperror.ErrForbidden
+	}
+	err = tx.QueryRow(ctx, `INSERT INTO veyra_account(id,user_id,mode,name,currency,ledger_status) VALUES($1,$2,$3,$4,$5,$6) RETURNING created_at`, a.ID, a.UserID, a.Mode, a.Name, a.Currency, a.LedgerStatus).Scan(&a.CreatedAt)
+	if err != nil {
+		return domain.AccountSummary{}, mapError(err)
+	}
+	var balance *string
+	if entry != nil {
+		if _, err := tx.Exec(ctx, `INSERT INTO veyra_cash_entry(id,account_id,entry_type,amount_minor) VALUES($1,$2,$3,$4)`, entry.ID, entry.AccountID, entry.EntryType, entry.AmountMinor); err != nil {
+			return domain.AccountSummary{}, mapError(err)
+		}
+		value := domain.FormatMoney(entry.AmountMinor)
+		balance = &value
+	}
+	if err := tx.Commit(ctx); err != nil {
+		return domain.AccountSummary{}, apperror.ErrUnavailable
+	}
+	return domain.AccountSummary{Account: a, CashBalance: balance}, nil
+}
+
+const summarySelect = `SELECT a.id,a.user_id,a.mode,a.name,a.currency,a.ledger_status,a.created_at,CASE WHEN a.ledger_status='COMPLETE' THEN (SELECT COALESCE(sum(e.amount_minor),0)::bigint FROM veyra_cash_entry e WHERE e.account_id=a.id) ELSE NULL END FROM veyra_account a`
+
+func scanSummary(row pgx.Row) (domain.AccountSummary, error) {
+	var s domain.AccountSummary
+	var minor *int64
+	err := row.Scan(&s.ID, &s.UserID, &s.Mode, &s.Name, &s.Currency, &s.LedgerStatus, &s.CreatedAt, &minor)
+	if err != nil {
+		return s, mapError(err)
+	}
+	if minor != nil {
+		value := domain.FormatMoney(*minor)
+		s.CashBalance = &value
+	}
+	return s, nil
+}
+
+func (r *Postgres) Get(ctx context.Context, userID, accountID string) (domain.AccountSummary, error) {
+	return scanSummary(r.pool.QueryRow(ctx, summarySelect+` WHERE a.user_id=$1 AND a.id=$2`, userID, accountID))
+}
+
+func (r *Postgres) List(ctx context.Context, userID string) ([]domain.AccountSummary, error) {
+	rows, err := r.pool.Query(ctx, summarySelect+` WHERE a.user_id=$1 ORDER BY a.created_at,a.id`, userID)
+	if err != nil {
+		return nil, apperror.ErrUnavailable
+	}
+	defer rows.Close()
+	list := make([]domain.AccountSummary, 0)
+	for rows.Next() {
+		s, err := scanSummary(rows)
+		if err != nil {
+			return nil, err
+		}
+		list = append(list, s)
+	}
+	return list, mapError(rows.Err())
+}
+
+func mapError(err error) error {
+	if err == nil {
+		return nil
+	}
+	if errors.Is(err, pgx.ErrNoRows) {
+		return apperror.ErrNotFound
+	}
+	var pgErr *pgconn.PgError
+	if errors.As(err, &pgErr) && pgErr.Code == "23505" {
+		return apperror.ErrConflict
+	}
+	return apperror.ErrUnavailable
+}