feat(Core/Battlefield): Add Player::InBattlefield() and Battlefield::IsPlayerInBattlefield() (#26129)

src/server/game/Battlefield/Battlefield.cpp

@@ -298,6 +298,20 @@ bool Battlefield::IsPlayerInWarOrInvited(Player* player) const
     return PlayersInWar[teamId].count(player->GetGUID()) || InvitedPlayers[teamId].count(player->GetGUID());
 }
 
+bool Battlefield::IsPlayerInBattlefield(ObjectGuid guid) const
+{
+    if (!IsWarTime())
+        return false;
+
+    // PlayersInWar is split into per-team sets, but a GUID alone does not indicate the team, so check both sets.
+    // This also stays correct if an OnBattlefieldPlayerJoinWar handler reassigned the team GetTeamId() returns.
+    for (uint8 team = 0; team < PVP_TEAMS_COUNT; ++team)
+        if (PlayersInWar[team].count(guid))
+            return true;
+
+    return false;
+}
+
 void Battlefield::KickAfkPlayers()
 {
     ForEachPlayerInWar([this](Player* player)

src/server/game/Battlefield/Battlefield.h

@@ -365,6 +365,9 @@ public:
     /// Returns the set of players actively fighting in the war (per team, read-only).
     GuidUnorderedSet const& GetPlayersInWarSet(TeamId teamId) const { return PlayersInWar[teamId]; }
 
+    // Returns true if the player is enrolled as a participant in the currently active battle.
+    bool IsPlayerInBattlefield(ObjectGuid guid) const;
+
     void DoPlaySoundToAll(uint32 soundId);
 
     void InvitePlayerToQueue(Player* player);

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

@@ -12227,6 +12227,12 @@ Battleground* Player::GetBattleground(bool create) const
     return (create || (bg && bg->FindBgMap()) ? bg : nullptr);
 }
 
+bool Player::InBattlefield() const
+{
+    Battlefield* bf = sBattlefieldMgr->GetBattlefieldToZoneId(GetZoneId());
+    return bf && bf->IsWarTime();
+}
+
 bool Player::InBattlegroundQueue(bool ignoreArena) const
 {
     for (uint8 i = 0; i < PLAYER_MAX_BATTLEGROUND_QUEUES; ++i)

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

@@ -2289,6 +2289,7 @@ public:
     /*********************************************************/
 
     [[nodiscard]] bool InBattleground() const { return m_bgData.bgInstanceID != 0; }
+    [[nodiscard]] bool InBattlefield() const;   // True if the player is in Wintergrasp and it's war time.
     [[nodiscard]] bool InArena() const;
     [[nodiscard]] uint32 GetBattlegroundId() const { return m_bgData.bgInstanceID; }
     [[nodiscard]] BattlegroundTypeId GetBattlegroundTypeId() const { return m_bgData.bgTypeID; }