fix(Core/Unit): Implement GetDisplayRace() (#17609)

src/server/game/Entities/Unit/Unit.cpp

@@ -21145,6 +21145,18 @@ void Unit::setRace(uint8 race)
         m_race = race;
 }
 
+DisplayRace Unit::GetDisplayRaceFromModelId(uint32 modelId) const
+{
+    if (CreatureDisplayInfoEntry const* display = sCreatureDisplayInfoStore.LookupEntry(modelId))
+    {
+        if (CreatureDisplayInfoExtraEntry const* displayExtra = sCreatureDisplayInfoExtraStore.LookupEntry(display->ExtendedDisplayInfoID))
+        {
+            return DisplayRace(displayExtra->DisplayRaceID);
+        }
+    }
+    return DisplayRace::None;
+}
+
 // Check if unit in combat with specific unit
 bool Unit::IsInCombatWith(Unit const* who) const
 {

src/server/game/Entities/Unit/Unit.h

@@ -1438,6 +1438,8 @@ public:
     [[nodiscard]] uint8 getClass() const { return GetByteValue(UNIT_FIELD_BYTES_0, 1); }
     [[nodiscard]] uint32 getClassMask() const { return 1 << (getClass() - 1); }
     [[nodiscard]] uint8 getGender() const { return GetByteValue(UNIT_FIELD_BYTES_0, 2); }
+    [[nodiscard]] DisplayRace GetDisplayRaceFromModelId(uint32 modelId) const;
+    [[nodiscard]] DisplayRace GetDisplayRace() const { return GetDisplayRaceFromModelId(GetDisplayId()); };
 
     [[nodiscard]] float GetStat(Stats stat) const { return float(GetUInt32Value(static_cast<uint16>(UNIT_FIELD_STAT0) + stat)); }
     void SetStat(Stats stat, int32 val) { SetStatInt32Value(static_cast<uint16>(UNIT_FIELD_STAT0) + stat, val); }

src/server/shared/SharedDefines.h

@@ -105,6 +105,33 @@ enum Races
 
 #define RACEMASK_HORDE RACEMASK_ALL_PLAYABLE & ~RACEMASK_ALLIANCE
 
+// DisplayRace values from CreatureDisplayInfoExtra.dbc
+enum class DisplayRace : uint8
+{
+    None              = 0,
+    Human             = 1,
+    Orc               = 2,
+    Dwarf             = 3,
+    NightElf          = 4,
+    Undead            = 5,
+    Tauren            = 6,
+    Gnome             = 7,
+    Troll             = 8,
+    Goblin            = 9,
+    BloodElf          = 10,
+    Draenei           = 11,
+    FelOrc            = 12,
+    Naga              = 13,
+    Broken            = 14,
+    Skeleton          = 15,
+    Vrykul            = 16,
+    Tuskarr           = 17,
+    ForestTroll       = 18,
+    Taunka            = 19,
+    NorthrendSkeleton = 20,
+    IceTroll          = 21
+};
+
 // Class value is index in ChrClasses.dbc
 // EnumUtils: DESCRIBE THIS
 enum Classes