Implement Tower accumulation reward claiming

server/internal/masterdata/tower.go

@@ -0,0 +1,84 @@
+package masterdata
+
+import (
+	"log"
+	"sort"
+
+	"lunar-tear/server/internal/utils"
+)
+
+type TowerTier struct {
+	QuestMissionClearCount int32
+	Rewards                []RewardItem
+}
+
+type TowerCatalog struct {
+	TiersByChapter map[int32][]TowerTier
+}
+
+func (c *TowerCatalog) CollectRewards(chapterId, oldCount, targetCount int32) ([]RewardItem, int32) {
+	var items []RewardItem
+	highest := int32(0)
+	for _, t := range c.TiersByChapter[chapterId] {
+		if t.QuestMissionClearCount > oldCount && t.QuestMissionClearCount <= targetCount {
+			items = append(items, t.Rewards...)
+			if t.QuestMissionClearCount > highest {
+				highest = t.QuestMissionClearCount
+			}
+		}
+	}
+	return items, highest
+}
+
+func LoadTowerCatalog() *TowerCatalog {
+	// chapterId -> accumulation reward group id
+	accumRewardRows, err := utils.ReadTable[EntityMEventQuestTowerAccumulationReward]("m_event_quest_tower_accumulation_reward")
+	if err != nil {
+		log.Fatalf("load event quest tower accumulation reward table: %v", err)
+	}
+	groupByChapter := make(map[int32]int32, len(accumRewardRows))
+	for _, r := range accumRewardRows {
+		groupByChapter[r.EventQuestChapterId] = r.EventQuestTowerAccumulationRewardGroupId
+	}
+
+	// reward group id -> reward items
+	rewardGroupRows, err := utils.ReadTable[EntityMEventQuestTowerRewardGroup]("m_event_quest_tower_reward_group")
+	if err != nil {
+		log.Fatalf("load event quest tower reward group table: %v", err)
+	}
+	itemsByRewardGroup := make(map[int32][]RewardItem)
+	for _, r := range rewardGroupRows {
+		itemsByRewardGroup[r.EventQuestTowerRewardGroupId] = append(itemsByRewardGroup[r.EventQuestTowerRewardGroupId], RewardItem{
+			PossessionType: r.PossessionType,
+			PossessionId:   r.PossessionId,
+			Count:          r.Count,
+		})
+	}
+
+	// accumulation group id -> tiers (threshold + resolved reward items)
+	accumGroupRows, err := utils.ReadTable[EntityMEventQuestTowerAccumulationRewardGroup]("m_event_quest_tower_accumulation_reward_group")
+	if err != nil {
+		log.Fatalf("load event quest tower accumulation reward group table: %v", err)
+	}
+	tiersByGroup := make(map[int32][]TowerTier)
+	for _, r := range accumGroupRows {
+		tiersByGroup[r.EventQuestTowerAccumulationRewardGroupId] = append(tiersByGroup[r.EventQuestTowerAccumulationRewardGroupId], TowerTier{
+			QuestMissionClearCount: r.QuestMissionClearCount,
+			Rewards:                itemsByRewardGroup[r.EventQuestTowerRewardGroupId],
+		})
+	}
+
+	// resolve per-chapter, sorted ascending by threshold
+	tiersByChapter := make(map[int32][]TowerTier, len(groupByChapter))
+	for chapterId, groupId := range groupByChapter {
+		tiers := tiersByGroup[groupId]
+		sort.Slice(tiers, func(i, j int) bool {
+			return tiers[i].QuestMissionClearCount < tiers[j].QuestMissionClearCount
+		})
+		tiersByChapter[chapterId] = tiers
+	}
+
+	log.Printf("tower catalog loaded: %d chapters", len(tiersByChapter))
+
+	return &TowerCatalog{TiersByChapter: tiersByChapter}
+}