[refactor] Split MobManager.cpp into MobAI.cpp and Combat.cpp

This is terrible. It was a mistake to do this before cleaning up the
actual code. It might be better not to use this commit and to do this
refactor in a different order or something.

src/MobAI.hpp

@@ -0,0 +1,110 @@
+#pragma once
+
+#include "CNProtocol.hpp"
+#include "NPCManager.hpp"
+
+enum class MobState {
+    INACTIVE,
+    ROAMING,
+    COMBAT,
+    RETREAT,
+    DEAD
+};
+
+struct Mob : public BaseNPC {
+    // general
+    MobState state;
+    int maxHealth;
+    int spawnX;
+    int spawnY;
+    int spawnZ;
+    int level;
+
+    std::unordered_map<int32_t,time_t> unbuffTimes;
+
+    // dead
+    time_t killedTime = 0;
+    time_t regenTime;
+    bool summoned = false;
+    bool despawned = false; // for the sake of death animations
+
+    // roaming
+    int idleRange;
+    const int sightRange;
+    time_t nextMovement = 0;
+    bool staticPath = false;
+    int roamX, roamY, roamZ;
+
+    // combat
+    CNSocket *target = nullptr;
+    time_t nextAttack = 0;
+    time_t lastDrainTime = 0;
+    int skillStyle = -1; // -1 for nothing, 0-2 for corruption, -2 for eruption
+    int hitX, hitY, hitZ; // for use in ability targeting
+
+    // drop
+    int dropType;
+
+    // group
+    int groupLeader = 0;
+    int offsetX, offsetY;
+    int groupMember[4] = {0, 0, 0, 0};
+
+    // temporary; until we're sure what's what
+    nlohmann::json data;
+
+    Mob(int x, int y, int z, int angle, uint64_t iID, int type, nlohmann::json d, int32_t id)
+        : BaseNPC(x, y, z, angle, iID, type, id),
+          maxHealth(d["m_iHP"]),
+          sightRange(d["m_iSightRange"]) {
+        state = MobState::ROAMING;
+
+        data = d;
+
+        regenTime = data["m_iRegenTime"];
+        idleRange = (int)data["m_iIdleRange"];
+        dropType = data["m_iDropType"];
+        level = data["m_iNpcLevel"];
+
+        roamX = spawnX = appearanceData.iX;
+        roamY = spawnY = appearanceData.iY;
+        roamZ = spawnZ = appearanceData.iZ;
+
+        offsetX = 0;
+        offsetY = 0;
+
+        appearanceData.iConditionBitFlag = 0;
+
+        // NOTE: there appear to be discrepancies in the dump
+        appearanceData.iHP = maxHealth;
+
+        npcClass = NPC_MOB;
+    }
+
+    // constructor for /summon
+    Mob(int x, int y, int z, uint64_t iID, int type, nlohmann::json d, int32_t id)
+        : Mob(x, y, z, 0, iID, type, d, id) {
+        summoned = true; // will be despawned and deallocated when killed
+    }
+
+    ~Mob() {}
+
+    auto operator[](std::string s) {
+        return data[s];
+    }
+};
+
+namespace MobAI {
+    extern bool simulateMobs;
+    extern std::map<int32_t, Mob*> Mobs;
+
+    void init();
+
+    // TODO: make this internal later
+    void incNextMovement(Mob *mob, time_t currTime=0);
+    bool aggroCheck(Mob *mob, time_t currTime);
+    void clearDebuff(Mob *mob);
+    void followToCombat(Mob *mob);
+    void groupRetreat(Mob *mob);
+    void enterCombat(CNSocket *sock, Mob *mob);
+}