Flechazo
d8771caef2
Implement hunting AP and progress, event tasks, exchanges, games, stories and actions; connect battle and reward handling. Add CashShop plugin and installation, server purchases and entitlements, recharge rules and plugin version metadata. Distribute binary calendars independently; cache GameData in memory and fix single-connection query deadlocks. Improve automatic login and recovery diagnostics; document configuration and release flows.
70 lines
1.7 KiB
Go
70 lines
1.7 KiB
Go
package player
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import (
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"fmt"
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"math"
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"bd2server/internal/server/gamedata"
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)
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// ExchangeOnce applies a server-calculated cost and reward in one wallet save.
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// The caller's account transaction also owns inventory and gameplay receipts.
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func (s *Wallet) ExchangeOnce(identity string, costs, rewards []gamedata.Reward) error {
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if identity == "" {
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return fmt.Errorf("player: missing wallet exchange identity")
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}
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s.mu.Lock()
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defer s.mu.Unlock()
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if s.state.Spent[identity] {
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return nil
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}
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next := cloneWallet(s.state)
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if err := exchangeCurrency(&next.Currency, costs, rewards); err != nil {
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return err
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}
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next.Spent[identity] = true
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return s.commit(next, entry("spent", identity, []byte("true"))...)
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}
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func (s *Wallet) CanExchange(costs, rewards []gamedata.Reward) error {
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c := s.Snapshot()
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return exchangeCurrency(&c, costs, rewards)
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}
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func exchangeCurrency(c *Currency, costs, rewards []gamedata.Reward) error {
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value := func(t uint64) *uint64 {
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switch t {
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case 2:
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return &c.Jewelry
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case 3:
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return &c.FreeJewelry
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case 4:
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return &c.Gold
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case 12:
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return &c.Catalyst
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case 20:
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return &c.Mileage
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case 22:
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return &c.HopePowder
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case 68:
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return &c.EquipMileage
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}
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return nil
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}
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for _, r := range costs {
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v := value(r.Type)
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if v == nil || r.ID != 0 || r.Count == 0 || *v < r.Count {
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return fmt.Errorf("player: invalid or insufficient currency %d", r.Type)
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}
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*v -= r.Count
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}
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for _, r := range rewards {
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v := value(r.Type)
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if v == nil || r.ID != 0 || r.Count == 0 || *v > math.MaxInt64-r.Count || r.Count > math.MaxInt64 {
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return fmt.Errorf("player: invalid or overflowing currency %d", r.Type)
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}
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*v += r.Count
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}
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return nil
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}
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