113 lines
3.4 KiB
Go
113 lines
3.4 KiB
Go
package mail
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import (
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"errors"
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"fmt"
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"math"
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"reflect"
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"sort"
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"strings"
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"time"
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"bd2server/internal/server/gamedata"
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"bd2server/internal/server/wire"
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)
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// Cash attachments are already resolved at purchase, so manual boxes must not
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// be expanded again and selected random rewards must not be rolled on claim.
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type CashRewardEconomy interface {
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ApplyResolved(string, []gamedata.Reward, []gamedata.Reward) ([]byte, error)
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}
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func (s *Service) AttachCashRewards(e CashRewardEconomy, templates map[uint64]bool) error {
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if e == nil || len(templates) == 0 {
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return errors.New("mail: missing cash economy or templates")
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}
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s.cashEconomy = e
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s.cashTemplates = make(map[uint64]bool, len(templates))
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for id, ok := range templates {
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s.cashTemplates[id] = ok
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}
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return nil
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}
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func (s *Service) IssueCashOnce(identity string, template uint64, rewards []gamedata.Reward, sentAt time.Time) error {
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s.mu.Lock()
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defer s.mu.Unlock()
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if s.cashEconomy == nil || !s.cashTemplates[template] {
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return fmt.Errorf("mail: cash template %d or economy unavailable", template)
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}
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if identity == "" || strings.TrimSpace(identity) != identity || len(identity) > 450 || sentAt.UnixMilli() <= 0 || sentAt.UnixMilli() >= 253402300799000 {
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return errors.New("mail: invalid cash mail identity or time")
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}
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if err := validateCashAttachments(rewards); err != nil {
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return err
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}
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key := "cash:" + identity
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if id, ok := s.issued[key]; ok {
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previous := s.dynamic[id]
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if !previous.IsCash || previous.TemplateID != template || !reflect.DeepEqual(mailAttachments(previous), rewards) {
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return errors.New("mail: cash identity reused with different attachments")
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}
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return nil
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}
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return s.enqueueCompensations([]compensation{{identity: key, templateID: template, isCash: true, rewards: rewards, sentAt: sentAt}})
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}
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func validateCashAttachments(rewards []gamedata.Reward) error {
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if len(rewards) == 0 {
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return errors.New("mail: empty cash attachments")
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}
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for _, r := range rewards {
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if r.Type < 2 || r.Type > 72 || r.Count == 0 || r.Count > math.MaxInt32 || r.ID > math.MaxInt32 {
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return fmt.Errorf("mail: invalid cash attachment %+v", r)
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}
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}
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return nil
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}
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func (s *Service) cashInfo(request []byte) ([]byte, error) {
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start, _, err := wire.Varint(request, 2)
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if err != nil || start > math.MaxInt64 {
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return nil, errors.New("mail: invalid cash cursor")
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}
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count, present, err := wire.Varint(request, 3)
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if err != nil || !present || count == 0 || count > math.MaxInt32 {
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return nil, errors.New("mail: invalid cash select count")
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}
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if count > mailHistoryPageMax {
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count = mailHistoryPageMax
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}
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entries := map[uint64]MailDBInfo{}
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for _, entry := range s.Starter.Mails {
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if entry.IsCash && !containsID(s.state.Opened, entry.MailID) {
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entries[entry.MailID] = entry
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}
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}
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for id, entry := range s.dynamic {
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if entry.IsCash && !containsID(s.state.Opened, id) {
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entries[id] = entry
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}
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}
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ids := make([]uint64, 0, len(entries))
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var max uint64
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for id := range entries {
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ids = append(ids, id)
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if id > max {
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max = id
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}
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}
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sort.Slice(ids, func(i, j int) bool { return ids[i] > ids[j] })
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var result []byte
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var selected uint64
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for _, id := range ids {
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if start != 0 && id >= start {
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continue
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}
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if selected >= count {
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break
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}
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result = wire.AppendBytes(result, 1, entries[id].encode())
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selected++
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}
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result = wire.AppendVarint(result, 2, uint64(len(entries)))
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return wire.AppendVarint(result, 3, max), nil
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}
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