邹方成
a7a0f639e1
fix: 修复微信通知字段截断导致的编码错误 feat: 添加有效邀请相关字段和任务中心常量 refactor: 重构一番赏奖品格位逻辑 perf: 优化道具卡列表聚合显示 docs: 更新项目说明文档和API文档 test: 添加字符串截断工具测试
80 lines
2.5 KiB
Go
80 lines
2.5 KiB
Go
package strategy
|
||
|
||
import (
|
||
"bindbox-game/internal/repository/mysql/dao"
|
||
"context"
|
||
"crypto/hmac"
|
||
"crypto/sha256"
|
||
"encoding/binary"
|
||
"errors"
|
||
"fmt"
|
||
)
|
||
|
||
type ichibanStrategy struct {
|
||
read *dao.Query
|
||
write *dao.Query
|
||
}
|
||
|
||
func NewIchiban(read *dao.Query, write *dao.Query) *ichibanStrategy {
|
||
return &ichibanStrategy{read: read, write: write}
|
||
}
|
||
|
||
func (s *ichibanStrategy) SelectItemBySlot(ctx context.Context, activityID int64, issueID int64, slotIndex int64) (int64, map[string]any, error) {
|
||
act, err := s.read.Activities.WithContext(ctx).Where(s.read.Activities.ID.Eq(activityID)).First()
|
||
if err != nil || act == nil || len(act.CommitmentSeedMaster) == 0 {
|
||
return 0, nil, errors.New("commitment not found")
|
||
}
|
||
rewards, err := s.read.ActivityRewardSettings.WithContext(ctx).ReadDB().Where(s.read.ActivityRewardSettings.IssueID.Eq(issueID)).Order(
|
||
s.read.ActivityRewardSettings.Level.Desc(),
|
||
s.read.ActivityRewardSettings.Sort.Asc(),
|
||
s.read.ActivityRewardSettings.ID.Asc(),
|
||
).Find()
|
||
if err != nil || len(rewards) == 0 {
|
||
return 0, nil, errors.New("no rewards")
|
||
}
|
||
// 一番赏：每种奖品 = 1个格位，无数量概念
|
||
totalSlots := int64(len(rewards))
|
||
if totalSlots <= 0 {
|
||
return 0, nil, errors.New("no slots")
|
||
}
|
||
if slotIndex < 0 || slotIndex >= totalSlots {
|
||
return 0, nil, errors.New("slot out of range")
|
||
}
|
||
// build list: 每个reward直接对应一个slot
|
||
slots := make([]int64, totalSlots)
|
||
for i, r := range rewards {
|
||
slots[i] = r.ID
|
||
}
|
||
// deterministic shuffle by CommitmentSeedMaster
|
||
seedKey := act.CommitmentSeedMaster
|
||
|
||
mac := hmac.New(sha256.New, seedKey)
|
||
for i := int(totalSlots - 1); i > 0; i-- {
|
||
mac.Reset()
|
||
mac.Write([]byte(fmt.Sprintf("shuffle:%d|issue:%d", i, issueID)))
|
||
sum := mac.Sum(nil)
|
||
rnd := int(binary.BigEndian.Uint64(sum[:8]) % uint64(i+1))
|
||
slots[i], slots[rnd] = slots[rnd], slots[i]
|
||
}
|
||
picked := slots[slotIndex]
|
||
|
||
// Calculate seed hash for proof
|
||
sha := sha256.Sum256(seedKey)
|
||
seedHash := fmt.Sprintf("%x", sha)
|
||
|
||
proof := map[string]any{
|
||
"total_slots": totalSlots,
|
||
"slot_index": slotIndex,
|
||
"seed_hash": seedHash,
|
||
"seed_type": "commitment",
|
||
}
|
||
return picked, proof, nil
|
||
}
|
||
|
||
func (s *ichibanStrategy) GrantReward(ctx context.Context, userID int64, rewardID int64) error {
|
||
// 一番赏模式下不再需要扣减数量，因为每个奖品对应唯一格位
|
||
// 格位占用通过 issue_position_claims 表来追踪，而非 quantity 字段
|
||
// 这里保留接口兼容性，实际的占用检查在调用方完成
|
||
return nil
|
||
}
|