Reuse `useNanoSkill` codepath for passive powers

src/Abilities.cpp

@@ -57,6 +57,23 @@ static SkillResult handleSkillDamageNDebuff(SkillData* skill, int power, ICombat
 }
 
 static SkillResult handleSkillBuff(SkillData* skill, int power, ICombatant* source, ICombatant* target) {
+    BuffStack passiveBuff = {
+        skill->drainType == SkillDrainType::PASSIVE ? 1 : skill->durationTime[power], // ticks
+        skill->values[0][power], // value
+        source->getRef(), // source
+        source == target ? BuffClass::NANO : BuffClass::GROUP_NANO, // buff class
+    };
+
+    int timeBuffId = Abilities::getCSTBFromST(skill->skillType);
+    if(!target->addBuff(timeBuffId,
+            [](EntityRef self, Buff* buff, int status, BuffStack* stack) {
+                Buffs::timeBuffUpdate(self, buff, status, stack);
+            },
+            [](EntityRef self, Buff* buff, time_t currTime) {
+                // no-op
+            },
+            &passiveBuff)) return SkillResult(); // no result if already buffed
+
     sSkillResult_Buff result{};
     result.eCT = target->getCharType();
     result.iID = target->getID();
@@ -206,14 +223,16 @@ void Abilities::useNanoSkill(CNSocket* sock, SkillData* skill, sNano& nano, std:
     if (Nanos::getNanoBoost(plr))
         boost = 3;
 
-    nano.iStamina -= skill->batteryUse[boost];
-    if (nano.iStamina < 0)
-        nano.iStamina = 0;
+    if(skill->drainType == SkillDrainType::ACTIVE) {
+        nano.iStamina -= skill->batteryUse[boost];
+        if (nano.iStamina <= 0)
+            nano.iStamina = 0;
+    }
 
     std::vector<SkillResult> results = handleSkill(skill, boost, plr, affected);
-    size_t resultSize = 0; // guaranteed to be the same for every item
-    if (!results.empty()) resultSize = results.back().size;
+    if(results.empty()) return; // no effect; no need for confirmation packets
 
+    size_t resultSize = results.back().size; // guaranteed to be the same for every item
     if (!validOutVarPacket(sizeof(sP_FE2CL_NANO_SKILL_USE_SUCC), results.size(), resultSize)) {
         std::cout << "[WARN] bad sP_FE2CL_NANO_SKILL_USE_SUCC packet size\n";
         return;
@@ -241,9 +260,6 @@ void Abilities::useNanoSkill(CNSocket* sock, SkillData* skill, sNano& nano, std:
         PlayerManager::sendToGroup(sock, pkt, P_FE2CL_NANO_SKILL_USE, resplen);
     else
         PlayerManager::sendToViewable(sock, pkt, P_FE2CL_NANO_SKILL_USE, resplen);
-
-    if (nano.iStamina <= 0)
-        Nanos::summonNano(sock, -1);
 }
 
 void Abilities::useNPCSkill(EntityRef npc, int skillID, std::vector<ICombatant*> affected) {
@@ -293,14 +309,8 @@ static std::vector<ICombatant*> entityRefsToCombatants(std::vector<EntityRef> re
 
 std::vector<ICombatant*> Abilities::matchTargets(ICombatant* src, SkillData* skill, int count, int32_t *ids) {
 
-    if(skill->targetType == SkillTargetType::GROUP) {
-        // group
-        if(count != 1 || ids[0] != src->getID()) {
-            std::cout << "[WARN] skill: bad group targeting (id " << ids[0] << ")\n";
-            return {};
-        }
+    if(skill->targetType == SkillTargetType::GROUP)
         return entityRefsToCombatants(src->getGroupMembers());
-    }
 
     // this check *has* to happen after the group check above due to cases like group recall that use both
     if(skill->effectTarget == SkillEffectTarget::SELF)
@@ -393,6 +403,8 @@ int Abilities::getCSTBFromST(SkillType skillType) {
     case SkillType::NANOSTIMPAK:
         result = ECSB_STIMPAKSLOT1;
         break;
+    default:
+        break;
     }
     return result;
 }

src/Combat.cpp

@@ -874,9 +874,12 @@ static void playerTick(CNServer *serv, time_t currTime) {
             if (Abilities::SkillTable.find(nano->iSkillID) != Abilities::SkillTable.end()) {
                 // nano has skill data
                 SkillData* skill = &Abilities::SkillTable[nano->iSkillID];
-                if (skill->drainType == SkillDrainType::PASSIVE)
-                    Nanos::applyNanoBuff(skill, plr);
-                // ^ composite condition calculation is separate from combat for responsiveness
+                if (skill->drainType == SkillDrainType::PASSIVE) {
+                    ICombatant* src = dynamic_cast<ICombatant*>(plr);
+                    int32_t targets[] = { plr->iID };
+                    std::vector<ICombatant*> affectedCombatants = Abilities::matchTargets(src, skill, 1, targets);
+                    Abilities::useNanoSkill(sock, skill, *nano, affectedCombatants);
+                }
             }
         }
 

src/Nanos.cpp

@@ -69,43 +69,6 @@ void Nanos::addNano(CNSocket* sock, int16_t nanoID, int16_t slot, bool spendfm)
     PlayerManager::sendToViewable(sock, resp2, P_FE2CL_REP_PC_CHANGE_LEVEL);
 }
 
-std::vector<ICombatant*> Nanos::applyNanoBuff(SkillData* skill, Player* plr) {
-    assert(skill->drainType == SkillDrainType::PASSIVE);
-
-    EntityRef self = PlayerManager::getSockFromID(plr->iID);
-
-    int timeBuffId = Abilities::getCSTBFromST(skill->skillType);
-    int boost = Nanos::getNanoBoost(plr) ? 3 : 0;
-    int value = skill->values[0][boost];
-
-    BuffStack passiveBuff = {
-        1, // passive nano buffs refreshed every tick
-        value,
-        self,
-        BuffClass::NONE, // overwritten per target
-    };
-
-    // for passive skills, using just the player as a target is fine
-    // this is because the group skill type will ignore the count,
-    // and the other option is single-target
-    std::vector<ICombatant*> targets = Abilities::matchTargets(dynamic_cast<ICombatant*>(plr), skill, 1, &plr->iID);
-    std::vector<ICombatant*> affected;
-    for (ICombatant* target : targets) {
-
-        passiveBuff.buffStackClass = target == plr ? BuffClass::NANO : BuffClass::GROUP_NANO;
-        if(target->addBuff(timeBuffId,
-            [](EntityRef self, Buff* buff, int status, BuffStack* stack) {
-                Buffs::timeBuffUpdate(self, buff, status, stack);
-            },
-            [](EntityRef self, Buff* buff, time_t currTime) {
-                // no-op
-            },
-            &passiveBuff)) affected.push_back(target);
-    }
-
-    return affected;
-}
-
 void Nanos::summonNano(CNSocket *sock, int slot, bool silent) {
     INITSTRUCT(sP_FE2CL_REP_NANO_ACTIVE_SUCC, resp);
     resp.iActiveNanoSlotNum = slot;
@@ -130,8 +93,10 @@ void Nanos::summonNano(CNSocket *sock, int slot, bool silent) {
     if (slot != -1 && skill != nullptr && skill->drainType == SkillDrainType::PASSIVE) {
         // passive buff effect
         resp.eCSTB___Add = 1;
-        std::vector<ICombatant*> affectedCombatants = applyNanoBuff(skill, plr);
-        if(!affectedCombatants.empty()) Abilities::useNanoSkill(sock, skill, nano, affectedCombatants);
+        ICombatant* src = dynamic_cast<ICombatant*>(plr);
+        int32_t targets[] = { plr->iID };
+        std::vector<ICombatant*> affectedCombatants = Abilities::matchTargets(src, skill, 1, targets);
+        Abilities::useNanoSkill(sock, skill, nano, affectedCombatants);
     }
 
     if (!silent) // silent nano death but only for the summoning player
@@ -312,7 +277,7 @@ static void nanoSkillUseHandler(CNSocket* sock, CNPacketData* data) {
     std::vector<ICombatant*> targetData = Abilities::matchTargets(plrCombatant, skillData, pkt->iTargetCnt, (int32_t*)(pkt + 1));
     Abilities::useNanoSkill(sock, skillData, nano, targetData);
 
-    if (plr->Nanos[plr->activeNano].iStamina < 0)
+    if (plr->Nanos[plr->activeNano].iStamina <= 0)
         summonNano(sock, -1);
 }
 

src/Nanos.hpp

@@ -26,5 +26,4 @@ namespace Nanos {
     void summonNano(CNSocket* sock, int slot, bool silent = false);
     int nanoStyle(int nanoID);
     bool getNanoBoost(Player* plr);
-    std::vector<ICombatant*> applyNanoBuff(SkillData* skill, Player* plr);
 }