feat(Core/Groups): mail roll-won items when inventory is full (azerothcore#25909)

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Nyeriah

src/server/apps/worldserver/worldserver.conf.dist

@@ -3386,6 +3386,16 @@ DungeonAccessRequirements.OptionalStringID = 0
 
 JoinBGAndLFG.Enable = 0
 
+#
+#     LFG.MailItemOnFullInventory
+#        Description: When a player wins a group roll but their inventory is full, mail
+#                     the item to them instead of leaving it on the corpse.
+#        Default:     0 - Disabled
+#                     1 - Only in LFG/RDF groups
+#                     2 - In all group types
+
+LFG.MailItemOnFullInventory = 0
+
 #
 #     DungeonFinder.OptionsMask
 #        Description: Dungeon and raid finder system.

src/server/game/Entities/Player/Player.h

@@ -1668,6 +1668,7 @@ class Player : public Unit, public GridObject<Player>
     [[nodiscard]] PlayerMails const& GetMails() const { return m_mail; }
     void SendItemRetrievalMail(uint32 itemEntry, uint32 count); // Item retrieval mails sent by The Postmaster (34337)
     void SendItemRetrievalMail(std::vector<std::pair<uint32, uint32>> mailItems); // Item retrieval mails sent by The Postmaster (34337)
+    void SendItemRetrievalMail(Item* item); // As above, but for a pre-created item (preserves randomPropertyId)
 
     /*********************************************************/
     /*** MAILED ITEMS SYSTEM ***/

src/server/game/Entities/Player/PlayerMisc.cpp

@@ -508,3 +508,16 @@ void Player::SendItemRetrievalMail(std::vector<std::pair<uint32, uint32>> mailIt
 
     CharacterDatabase.CommitTransaction(trans);
 }
+
+void Player::SendItemRetrievalMail(Item* item)
+{
+    if (!item)
+        return;
+
+    CharacterDatabaseTransaction trans = CharacterDatabase.BeginTransaction();
+    item->SaveToDB(trans);
+    MailDraft("Recovered Item", "We recovered a lost item in the twisting nether and noted that it was yours.$B$BPlease find said object enclosed.")
+        .AddItem(item)
+        .SendMailTo(trans, MailReceiver(this, GetGUID().GetCounter()), MailSender(MAIL_CREATURE, 34337 /* The Postmaster */));
+    CharacterDatabase.CommitTransaction(trans);
+}

src/server/game/Groups/Group.cpp

@@ -1490,9 +1490,22 @@ void Group::CountTheRoll(Rolls::iterator rollI, Map* allowedMap)
                     }
                     else
                     {
-                        item->is_blocked = false;
-                        item->rollWinnerGUID = player->GetGUID();
-                        player->SendEquipError(msg, nullptr, nullptr, roll->itemid);
+                        uint32 mailOnFull = sWorld->getIntConfig(CONFIG_LFG_MAIL_ITEM_ON_FULL_INVENTORY);
+                        if (mailOnFull == MAIL_ITEM_ON_FULL_INVENTORY_EVERYWHERE || (mailOnFull == MAIL_ITEM_ON_FULL_INVENTORY_LFG_ONLY && isLFGGroup()))
+                        {
+                            item->is_looted = true;
+                            roll->getLoot()->NotifyItemRemoved(roll->itemSlot);
+                            roll->getLoot()->unlootedCount--;
+                            player->SendEquipError(msg, nullptr, nullptr, roll->itemid);
+                            if (Item* mailItem = Item::CreateItem(roll->itemid, item->count, player, false, item->randomPropertyId))
+                                player->SendItemRetrievalMail(mailItem);
+                        }
+                        else
+                        {
+                            item->is_blocked = false;
+                            item->rollWinnerGUID = player->GetGUID();
+                            player->SendEquipError(msg, nullptr, nullptr, roll->itemid);
+                        }
                     }
                 }
             }
@@ -1560,9 +1573,22 @@ void Group::CountTheRoll(Rolls::iterator rollI, Map* allowedMap)
                         }
                         else
                         {
-                            item->is_blocked = false;
-                            item->rollWinnerGUID = player->GetGUID();
-                            player->SendEquipError(msg, nullptr, nullptr, roll->itemid);
+                            uint32 mailOnFull = sWorld->getIntConfig(CONFIG_LFG_MAIL_ITEM_ON_FULL_INVENTORY);
+                            if (mailOnFull == MAIL_ITEM_ON_FULL_INVENTORY_EVERYWHERE || (mailOnFull == MAIL_ITEM_ON_FULL_INVENTORY_LFG_ONLY && isLFGGroup()))
+                            {
+                                item->is_looted = true;
+                                roll->getLoot()->NotifyItemRemoved(roll->itemSlot);
+                                roll->getLoot()->unlootedCount--;
+                                player->SendEquipError(msg, nullptr, nullptr, roll->itemid);
+                                if (Item* mailItem = Item::CreateItem(roll->itemid, item->count, player, false, item->randomPropertyId))
+                                    player->SendItemRetrievalMail(mailItem);
+                            }
+                            else
+                            {
+                                item->is_blocked = false;
+                                item->rollWinnerGUID = player->GetGUID();
+                                player->SendEquipError(msg, nullptr, nullptr, roll->itemid);
+                            }
                         }
                     }
                     else if (rollvote == DISENCHANT)

src/server/game/Groups/Group.h

@@ -128,6 +128,13 @@ enum lfgGroupFlags
     GROUP_LFG_FLAG_IS_HEROIC                = 0x004
 };
 
+enum MailItemOnFullInventory
+{
+    MAIL_ITEM_ON_FULL_INVENTORY_DISABLED    = 0,
+    MAIL_ITEM_ON_FULL_INVENTORY_LFG_ONLY    = 1,
+    MAIL_ITEM_ON_FULL_INVENTORY_EVERYWHERE  = 2,
+};
+
 enum DifficultyPreventionChangeType
 {
     DIFFICULTY_PREVENTION_CHANGE_NONE                   = 0,

src/server/game/World/WorldConfig.cpp

@@ -494,6 +494,8 @@ void WorldConfig::BuildConfigCache()
 
     SetConfigValue<bool>(CONFIG_ALLOW_JOIN_BG_AND_LFG, "JoinBGAndLFG.Enable", false);
 
+    SetConfigValue<uint32>(CONFIG_LFG_MAIL_ITEM_ON_FULL_INVENTORY, "LFG.MailItemOnFullInventory", 0);
+
     SetConfigValue<bool>(CONFIG_LEAVE_GROUP_ON_LOGOUT, "LeaveGroupOnLogout.Enabled", false);
 
     SetConfigValue<uint32>(CONFIG_RANDOM_ROLL_MAXIMUM, "Group.RandomRollMaximum", 1000000);

src/server/game/World/WorldConfig.h

@@ -375,6 +375,7 @@ enum ServerConfigs
     CONFIG_LOOT_NEED_BEFORE_GREED_ILVL_RESTRICTION,
     CONFIG_LFG_MAX_KICK_COUNT,
     CONFIG_LFG_KICK_PREVENTION_TIMER,
+    CONFIG_LFG_MAIL_ITEM_ON_FULL_INVENTORY,
     CONFIG_CHANGE_FACTION_MAX_MONEY,
     CONFIG_WATER_BREATH_TIMER,
     CONFIG_DAILY_RBG_MIN_LEVEL_AP_REWARD,