Core/Creatures: Implemented UNIT_FLAG_PASSIVE

src/server/game/Entities/Creature/Creature.cpp

@@ -1425,6 +1425,9 @@ bool Creature::canStartAttack(Unit const* who, bool force) const
     if (isCivilian())
         return false;
 
+    if (HasFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_PASSIVE))
+        return false;
+
     if (!canFly() && (GetDistanceZ(who) > CREATURE_Z_ATTACK_RANGE + m_CombatDistance))
         //|| who->IsControlledByPlayer() && who->IsFlying()))
         // we cannot check flying for other creatures, too much map/vmap calculation
@@ -1923,6 +1926,9 @@ bool Creature::CanAssistTo(const Unit* u, const Unit* enemy, bool checkfaction /
     if (isCivilian())
         return false;
 
+    if (HasFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_NON_ATTACKABLE | UNIT_FLAG_NOT_SELECTABLE | UNIT_FLAG_PASSIVE))
+        return false;
+
     // skip fighting creature
     if (isInCombat())
         return false;

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

@@ -2994,10 +2994,11 @@ void Player::InitStatsForLevel(bool reapplyMods)
     // cleanup unit flags (will be re-applied if need at aura load).
     RemoveFlag(UNIT_FIELD_FLAGS,
         UNIT_FLAG_NON_ATTACKABLE | UNIT_FLAG_DISABLE_MOVE | UNIT_FLAG_NOT_ATTACKABLE_1 |
+        UNIT_FLAG_OOC_NOT_ATTACKABLE | UNIT_FLAG_PASSIVE  | UNIT_FLAG_LOOTING          |
         UNIT_FLAG_PET_IN_COMBAT  | UNIT_FLAG_SILENCED     | UNIT_FLAG_PACIFIED         |
         UNIT_FLAG_STUNNED        | UNIT_FLAG_IN_COMBAT    | UNIT_FLAG_DISARMED         |
         UNIT_FLAG_CONFUSED       | UNIT_FLAG_FLEEING      | UNIT_FLAG_NOT_SELECTABLE   |
-        UNIT_FLAG_SKINNABLE      | UNIT_FLAG_MOUNT        | UNIT_FLAG_TAXI_FLIGHT);
+        UNIT_FLAG_SKINNABLE      | UNIT_FLAG_MOUNT        | UNIT_FLAG_TAXI_FLIGHT      );
     SetFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_PVP_ATTACKABLE);   // must be set
 
     SetFlag(UNIT_FIELD_FLAGS_2,UNIT_FLAG2_REGENERATE_POWER);// must be set

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

@@ -556,7 +556,7 @@ enum UnitFlags
     UNIT_FLAG_UNK_6                 = 0x00000040,
     UNIT_FLAG_NOT_ATTACKABLE_1      = 0x00000080,           // ?? (UNIT_FLAG_PVP_ATTACKABLE | UNIT_FLAG_NOT_ATTACKABLE_1) is NON_PVP_ATTACKABLE
     UNIT_FLAG_OOC_NOT_ATTACKABLE    = 0x00000100,           // 2.0.8 - (OOC Out Of Combat) Can not be attacked when not in combat. Removed if unit for some reason enter combat.
-    UNIT_FLAG_UNK_9                 = 0x00000200,           // 3.0.3 - makes you unable to attack everything
+    UNIT_FLAG_PASSIVE               = 0x00000200,           // makes you unable to attack everything. Almost identical to our "civilian"-term. Will ignore it's surroundings and not engage in combat unless "called upon" or engaged by another unit.
     UNIT_FLAG_LOOTING               = 0x00000400,           // loot animation
     UNIT_FLAG_PET_IN_COMBAT         = 0x00000800,           // in combat?, 2.0.8
     UNIT_FLAG_PVP                   = 0x00001000,           // changed in 3.0.3