{

STATE_FOLLOW_NONE = 0x000,

STATE_FOLLOW_INPROGRESS = 0x001, // must always have this state for any follow

STATE_FOLLOW_RETURNING = 0x002, // when returning to combat start after being in combat

STATE_FOLLOW_PAUSED = 0x004, // disables following

STATE_FOLLOW_COMPLETE = 0x008, // follow is completed and may end

STATE_FOLLOW_PREEVENT = 0x010, // not implemented (allow pre event to run, before follow is initiated)

STATE_FOLLOW_POSTEVENT = 0x020 // can be set at complete and allow post event to run

{

public:

explicit FollowerAI(Creature* pCreature);

~FollowerAI() {}

// virtual void WaypointReached(uint32 uiPointId) = 0;

void MovementInform(uint32 uiMotionType, uint32 uiPointId) override;

void AttackStart(Unit*) override;

void MoveInLineOfSight(Unit*) override;

void EnterEvadeMode() override;

void JustDied(Unit*) override;

void JustRespawned() override;

void UpdateAI(const uint32) override; // the "internal" update, calls UpdateFollowerAI()

virtual void UpdateFollowerAI(const uint32); // used when it's needed to add code in update (abilities, scripted events, etc)

void StartFollow(Player* pPlayer, uint32 uiFactionForFollower = 0, const Quest* pQuest = NULL);

void SetFollowPaused(bool bPaused); // if special event require follow mode to hold/resume during the follow

void SetFollowComplete(bool bWithEndEvent = false);

bool HasFollowState(uint32 uiFollowState) { return (m_uiFollowState & uiFollowState); }

protected:

Player* GetLeaderForFollower();

private:

void AddFollowState(uint32 uiFollowState) { m_uiFollowState |= uiFollowState; }

void RemoveFollowState(uint32 uiFollowState) { m_uiFollowState &= ~uiFollowState; }

bool AssistPlayerInCombat(Unit* pWho);

ObjectGuid m_leaderGuid;

uint32 m_uiUpdateFollowTimer;

uint32 m_uiFollowState;

const Quest* m_pQuestForFollow; // normally we have a quest