128 lines
3.6 KiB
Go
128 lines
3.6 KiB
Go
package economy
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import "context"
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// Carpet یک فرشِ ایرانی که بهجای میزِ بازی استفاده میشود. Owned یعنی قابلِ انتخاب.
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type Carpet struct {
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ID string `json:"id"`
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Title string `json:"title"`
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PriceCoins int64 `json:"price_coins"`
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VIP bool `json:"vip"`
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Img string `json:"img"` // URL کاملِ تصویرِ فرش (خالی برای classic که تصویری ندارد)
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Owned bool `json:"owned"`
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}
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// Carpets فرشهای فعال را با وضعیتِ مالکیتِ کاربر برمیگرداند.
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func (s *Service) Carpets(ctx context.Context, userID int64) ([]Carpet, error) {
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rows, err := s.db.QueryContext(ctx,
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`SELECT id, title, price_coins, vip FROM carpets WHERE enabled = 1 ORDER BY sort`)
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if err != nil {
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return nil, err
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}
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defer rows.Close()
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var carpets []Carpet
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for rows.Next() {
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var c Carpet
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var vip int
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if err := rows.Scan(&c.ID, &c.Title, &c.PriceCoins, &vip); err != nil {
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return nil, err
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}
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c.VIP = vip == 1
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if c.ID != "classic" {
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c.Img = s.imgURL("carpets", c.ID+".jpg")
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}
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carpets = append(carpets, c)
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}
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if err := rows.Err(); err != nil {
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return nil, err
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}
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owned, err := s.ownedCarpets(ctx, userID)
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if err != nil {
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return nil, err
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}
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isVIP := s.isVIP(ctx, userID)
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for i := range carpets {
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c := &carpets[i]
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c.Owned = (c.PriceCoins == 0 && !c.VIP) || (c.VIP && isVIP) || owned[c.ID]
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}
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return carpets, nil
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}
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func (s *Service) ownedCarpets(ctx context.Context, userID int64) (map[string]bool, error) {
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rows, err := s.db.QueryContext(ctx,
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`SELECT carpet_id FROM user_carpets WHERE user_id = ?`, userID)
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if err != nil {
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return nil, err
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}
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defer rows.Close()
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owned := map[string]bool{}
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for rows.Next() {
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var id string
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if err := rows.Scan(&id); err != nil {
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return nil, err
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}
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owned[id] = true
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}
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return owned, rows.Err()
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}
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// BuyCarpet یک فرش را با سکه باز میکند.
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func (s *Service) BuyCarpet(ctx context.Context, userID int64, carpetID string) error {
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var price int64
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var vip, enabled int
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err := s.db.QueryRowContext(ctx,
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`SELECT price_coins, vip, enabled FROM carpets WHERE id = ?`, carpetID).
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Scan(&price, &vip, &enabled)
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if err != nil || enabled != 1 {
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return ErrNotFound
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}
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tx, err := s.db.BeginTx(ctx, nil)
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if err != nil {
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return err
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}
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defer tx.Rollback()
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var exists int
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_ = tx.QueryRowContext(ctx,
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`SELECT 1 FROM user_carpets WHERE user_id = ? AND carpet_id = ?`, userID, carpetID).Scan(&exists)
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if exists == 1 {
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return ErrAlreadyOwned
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}
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if price > 0 {
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if err := adjustTx(ctx, tx, userID, CurrencyCoin, -price, "buy_carpet", carpetID); err != nil {
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return err
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}
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}
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if _, err := tx.ExecContext(ctx,
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`INSERT INTO user_carpets (user_id, carpet_id) VALUES (?, ?)`, userID, carpetID); err != nil {
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return err
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}
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// خرید = مالکیت + انتخابِ خودکار.
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if _, err := tx.ExecContext(ctx,
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`UPDATE users SET selected_carpet = ? WHERE id = ?`, carpetID, userID); err != nil {
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return err
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}
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return tx.Commit()
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}
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// SelectCarpet فرشِ انتخابیِ کاربر را تنظیم میکند (باید مالکش باشد یا رایگان/VIP).
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func (s *Service) SelectCarpet(ctx context.Context, userID int64, carpetID string) error {
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carpets, err := s.Carpets(ctx, userID)
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if err != nil {
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return err
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}
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for _, c := range carpets {
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if c.ID == carpetID {
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if !c.Owned {
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return ErrNotOwned
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}
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_, err := s.db.ExecContext(ctx,
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`UPDATE users SET selected_carpet = ? WHERE id = ?`, carpetID, userID)
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return err
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}
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}
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return ErrNotFound
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}
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