feat: Filter World Quests by party Leader Area Rank

Don't allow World quests to be selected when the server rolls them
if the party leader does not meet the minimum area rank requirements.
That way a large amount of quests won't show up for new players and
show them as unable to participate.

Author: pacampbell

Arrowgene.Ddon.GameServer/Handler/QuestGetSetQuestListHandler.cs

@@ -6,6 +6,7 @@
 using Arrowgene.Ddon.Shared.Model.Quest;
 using Arrowgene.Logging;
 using System.Collections.Generic;
+using System.Linq;
 
 namespace Arrowgene.Ddon.GameServer.Handler
 {
@@ -40,6 +41,8 @@ public override S2CQuestGetSetQuestListRes Handle(GameClient client, C2SQuestGet
                  * are random fetch, deliver and kill type quests.
                  */
 
+                var leaderCharacter = client.Party.Leader?.Client.Character;
+
                 // Populate state for all quests currently in progress by the player
                 foreach (var questScheduleId in client.Party.QuestState.GetActiveQuestScheduleIds())
                 {
@@ -49,7 +52,7 @@ public override S2CQuestGetSetQuestListRes Handle(GameClient client, C2SQuestGet
                         continue;
                     }
 
-                    CompletedQuest questStats = client.Party.Leader?.Client.Character.CompletedQuests.GetValueOrDefault(quest.QuestId);
+                    CompletedQuest questStats = leaderCharacter?.CompletedQuests.GetValueOrDefault(quest.QuestId);
                     QuestState questState = client.Party.QuestState.GetQuestState(quest);
                     res.SetQuestList.Add(quest.ToCDataSetQuestList(questState?.Step ?? 0, questStats?.ClearCount ?? 0));
                 }
@@ -66,7 +69,15 @@ public override S2CQuestGetSetQuestListRes Handle(GameClient client, C2SQuestGet
                         continue;
                     }
 
-                    CompletedQuest questStats = client.Party.Leader?.Client.Character.CompletedQuests.GetValueOrDefault(quest.QuestId);
+                    if (quest.OrderConditions.Any(c => c.Type == QuestOrderConditionType.AreaRank
+                        && (leaderCharacter == null
+                            || !leaderCharacter.AreaRanks.TryGetValue((QuestAreaId)c.Param01, out var areaRank)
+                            || areaRank.Rank < (uint)c.Param02)))
+                    {
+                        continue;
+                    }
+
+                    CompletedQuest questStats = leaderCharacter?.CompletedQuests.GetValueOrDefault(quest.QuestId);
                     res.SetQuestList.Add(quest.ToCDataSetQuestList(0, questStats?.ClearCount ?? 0));
                     client.Party.QuestState.AddNewQuest(quest, 0);
                     // Enemy requests arrive before the quest list, so loaded groups may have generic enemies. Reset them.

Arrowgene.Ddon.GameServer/Quests/QuestStateManager.cs

@@ -529,6 +529,20 @@ public HashSet<uint> AreaQuests(QuestAreaId areaId)
             }
         }
 
+        protected Quest RollEligibleQuestVariant(QuestId questId, Character leaderCharacter)
+        {
+            var candidates = QuestManager.GetQuestScheduleIdsForQuestId(questId)
+                .Select(id => QuestManager.GetQuestByScheduleId(id))
+                .Where(q => q != null && !q.OrderConditions.Any(c => c.Type == QuestOrderConditionType.AreaRank
+                    && (leaderCharacter == null
+                        || !leaderCharacter.AreaRanks.TryGetValue((QuestAreaId)c.Param01, out var rank)
+                        || rank.Rank < (uint)c.Param02)))
+                .ToList();
+
+            if (candidates.Count == 0) return null;
+            return candidates[Random.Shared.Next(candidates.Count)];
+        }
+
         public QuestState GetQuestState(uint questScheduleId)
         {
             lock (ActiveQuests)
@@ -707,14 +721,22 @@ protected PacketQueue SendWalletRewards(DdonGameServer server, GameClient client
             return packets;
         }
 
+        protected virtual Quest RollQuestVariant(QuestId questId)
+        {
+            return QuestManager.RollQuestForQuestId(questId);
+        }
+
         public void ResetInstance()
         {
             lock (ActiveQuests)
             {
                 foreach (var questId in CompletedWorldQuests)
                 {
-                    var quest = QuestManager.RollQuestForQuestId(questId);
-                    RolledInstanceWorldQuests[quest.QuestAreaId].Add(quest.QuestScheduleId);
+                    var quest = RollQuestVariant(questId);
+                    if (quest != null)
+                    {
+                        RolledInstanceWorldQuests[quest.QuestAreaId].Add(quest.QuestScheduleId);
+                    }
                 }
                 CompletedWorldQuests.Clear();
             }
@@ -812,6 +834,11 @@ public SharedQuestStateManager(PartyGroup party, DdonGameServer server)
             this.Server = server;
         }
 
+        protected override Quest RollQuestVariant(QuestId questId)
+        {
+            return RollEligibleQuestVariant(questId, Party.Leader?.Client.Character);
+        }
+
         public override bool CompleteQuestProgress(uint questScheduleId, DbConnection? connectionIn = null)
         {
             Quest quest = GetQuest(questScheduleId);