Implement leech

improperly erasing during iteration oops

src/Abilities.cpp

@@ -85,8 +85,26 @@ static SkillResult handleSkillDamageNDebuff(SkillData* skill, int power, ICombat
 }
 
 static SkillResult handleSkillLeech(SkillData* skill, int power, ICombatant* source, ICombatant* target) {
-    // TODO abilities
-    return SkillResult();
+    EntityRef sourceRef = source->getRef();
+    int heal = skill->values[0][power];
+    int healed = source->heal(sourceRef, heal);
+    int damage = heal * 2;
+    int dealt = target->takeDamage(sourceRef, damage);
+
+    sSkillResult_Leech result{};
+
+    result.Damage.eCT = target->getCharType();
+    result.Damage.iID = target->getID();
+    result.Damage.bProtected = dealt <= 0;
+    result.Damage.iDamage = dealt;
+    result.Damage.iHP = target->getCurrentHP();
+
+    result.Heal.eCT = result.Damage.eCT;
+    result.Heal.iID = result.Damage.iID;
+    result.Heal.iHealHP = healed;
+    result.Heal.iHP = source->getCurrentHP();
+
+    return SkillResult(sizeof(sSkillResult_Leech), &result);
 }
 
 static SkillResult handleSkillBuff(SkillData* skill, int power, ICombatant* source, ICombatant* target) {

src/Combat.cpp

@@ -61,14 +61,13 @@ void Player::removeBuff(int buffId, BuffClass buffClass) {
 }
 
 void Player::clearBuffs(bool force) {
-    for(auto buff : buffs) {
-        if(!force) {
-            removeBuff(buff.first);
-        } else {
-            delete buff.second;
-        }
+    auto it = buffs.begin();
+    while(it != buffs.end()) {
+        Buff* buff = (*it).second;
+        if(!force) buff->clear();
+        delete buff;
+        it = buffs.erase(it);
     }
-    buffs.clear();
 }
 
 bool Player::hasBuff(int buffId) {
@@ -169,6 +168,8 @@ void Player::step(time_t currTime) {
     // buffs
     for(auto buffEntry : buffs) {
         buffEntry.second->combatTick(currTime);
+        if(!isAlive())
+            break; // unsafe to keep ticking if we're dead
     }
 }
 #pragma endregion
@@ -215,14 +216,13 @@ void CombatNPC::removeBuff(int buffId, BuffClass buffClass) {
 }
 
 void CombatNPC::clearBuffs(bool force) {
-    for(auto buff : buffs) {
-        if(!force) {
-            removeBuff(buff.first);
-        } else {
-            delete buff.second;
-        }
+    auto it = buffs.begin();
+    while(it != buffs.end()) {
+        Buff* buff = (*it).second;
+        if(!force) buff->clear();
+        delete buff;
+        it = buffs.erase(it);
     }
-    buffs.clear();
 }
 
 bool CombatNPC::hasBuff(int buffId) {
@@ -957,6 +957,7 @@ static void playerTick(CNServer *serv, time_t currTime) {
         auto it = plr->buffs.begin();
         while(it != plr->buffs.end()) {
             Buff* buff = (*it).second;
+            //buff->combatTick() gets called in Player::step
             buff->tick(currTime);
             if(buff->isStale()) {
                 // garbage collect