Cleaned up item drop logic.

* Replaced bad exception logic with C-style error returns in ItemManager
* Removed unnecessary instances of objects being passed by value
* Fixed whitespace problems
* Added new config options to the default config.ini
* Updated tabledata reference

config.ini

@@ -38,6 +38,8 @@ xdtdata=tdata/xdt.json
 mobdata=tdata/mobs.json
 # path json
 pathdata=tdata/paths.json
+# drop json
+dropdata=tdata/drops.json
 # gruntwork output (this is what you submit)
 gruntwork=tdata/gruntwork.json
 
@@ -49,6 +51,15 @@ gruntwork=tdata/gruntwork.json
 # any number higher than 50 will disable commands
 accountlevel=1
 
+# should mobs drop event crates?
+# 0 = no event
+# 1 = Knishmas
+# 2 = Halloween
+# 3 = Easter
+eventmode=0
+# percent chance of an event crate dropping each kill
+eventcratechance=10
+
 # spawn coordinates (Z is height)
 # the supplied defaults are at Sector V (future)
 spawnx=632032

src/ItemManager.cpp

@@ -16,14 +16,11 @@ std::map<int32_t, Crate> ItemManager::Crates;
 /// pair Itemset, Rarity -> vector of pointers (map iterators) to records in ItemData
 std::map<std::pair<int32_t, int32_t>, std::vector<std::map<std::pair<int32_t, int32_t>, Item>::iterator>> ItemManager::CrateItems;
 
-// buffer for error messages
-char buffer[255];
-
 void ItemManager::init() {
     REGISTER_SHARD_PACKET(P_CL2FE_REQ_ITEM_MOVE, itemMoveHandler);
     REGISTER_SHARD_PACKET(P_CL2FE_REQ_PC_ITEM_DELETE, itemDeleteHandler);
     REGISTER_SHARD_PACKET(P_CL2FE_REQ_PC_GIVE_ITEM, itemGMGiveHandler);
-    //this one is for gumballs
+    // this one is for gumballs
     REGISTER_SHARD_PACKET(P_CL2FE_REQ_ITEM_USE, itemUseHandler);
     // Bank
     REGISTER_SHARD_PACKET(P_CL2FE_REQ_PC_BANK_OPEN, itemBankOpenHandler);
@@ -809,9 +806,13 @@ void ItemManager::chestOpenHandler(CNSocket *sock, CNPacketData *data) {
         return; // ignore the malformed packet
 
     sP_CL2FE_REQ_ITEM_CHEST_OPEN *chest = (sP_CL2FE_REQ_ITEM_CHEST_OPEN *)data->buf;
-    Player *player = PlayerManager::getPlayer(sock);
+    Player *plr = PlayerManager::getPlayer(sock);
 
-    if (player == nullptr)
+    // chest opening acknowledgement packet
+    INITSTRUCT(sP_FE2CL_REP_ITEM_CHEST_OPEN_SUCC, resp);
+    resp.iSlotNum = chest->iSlotNum;
+
+    if (plr == nullptr)
         return;
 
     // item giving packet
@@ -827,75 +828,82 @@ void ItemManager::chestOpenHandler(CNSocket *sock, CNPacketData *data) {
     memset(respbuf, 0, resplen);
 
     // maintain stats
-    reward->m_iCandy = player->money;
+    reward->m_iCandy = plr->money;
-    reward->m_iFusionMatter = player->fusionmatter;
+    reward->m_iFusionMatter = plr->fusionmatter;
     reward->iFatigue = 100; // prevents warning message
     reward->iFatigue_Level = 1;
     reward->iItemCnt = 1; // remember to update resplen if you change this
 
-    // item reward  
-    if (chest->ChestItem.iType != 9)
-        std::cout << "[WARN] Player tried to open a crate with incorrect iType ?!" << std::endl;
-    else 
-        item->sItem = openCrate(chest->ChestItem.iID, player->PCStyle.iGender);
-
     item->iSlotNum = chest->iSlotNum;
     item->eIL = chest->eIL;
 
+    // item reward
+    if (chest->ChestItem.iType != 9) {
+        std::cout << "[WARN] Player tried to open a crate with incorrect iType ?!" << std::endl;
+        return;
+    }
+
+    int itemSetId = -1, rarity = -1, ret = -1;
+    bool failing = false;
+
+    // find the crate
+    if (Crates.find(chest->ChestItem.iID) == Crates.end()) {
+        std::cout << "[WARN] Crate " << chest->ChestItem.iID << " not found!" << std::endl;
+        failing = true;
+    }
+    Crate& crate = Crates[chest->ChestItem.iID];
+
+    if (!failing)
+        itemSetId = getItemSetId(crate, chest->ChestItem.iID);
+    if (itemSetId == -1)
+        failing = true;
+
+    if (!failing)
+        rarity = getRarity(crate, itemSetId);
+    if (rarity == -1)
+        failing = true;
+
+    if (!failing)
+        ret = getCrateItem(item->sItem, itemSetId, rarity, plr->PCStyle.iGender);
+    if (ret == -1)
+        failing = true;
+
+    // if we failed to open a crate, at least give the player a gumball (suggested by Jade)
+    if (failing) {
+        item->sItem.iType = 7;
+        item->sItem.iID = 119 + (rand() % 3);
+        item->sItem.iOpt = 1;
+    }
+
     // update player
-    player->Inven[chest->iSlotNum] = item->sItem;
+    plr->Inven[chest->iSlotNum] = item->sItem;
 
     // transmit item
     sock->sendPacket((void*)respbuf, P_FE2CL_REP_REWARD_ITEM, resplen);
 
-    // chest opening acknowledgement packet
+    // transmit chest opening acknowledgement packet
-    INITSTRUCT(sP_FE2CL_REP_ITEM_CHEST_OPEN_SUCC, resp);
-
-    resp.iSlotNum = chest->iSlotNum;
-
     std::cout << "opening chest..." << std::endl;
     sock->sendPacket((void*)&resp, P_FE2CL_REP_ITEM_CHEST_OPEN_SUCC, sizeof(sP_FE2CL_REP_ITEM_CHEST_OPEN_SUCC));
 }
 
-sItemBase ItemManager::openCrate(int crateId, int playerGender) {
+int ItemManager::getItemSetId(Crate& crate, int crateId) {
-    sItemBase reward = {};   
-    try {
-        Crate crate = getCrate(crateId);
-        int itemSetId = getItemSetId(crate, crateId);
-        int rarity = getRarity(crate, itemSetId);           
-        reward = getCrateItem(itemSetId, rarity, playerGender);
-    }
-    catch (const std::exception& err) {
-        std::cerr << "[WARN] An error has occured while trying to open a crate. Error description: \n" << err.what() << std::endl;
-        // if we failed to open a crate, at least give the player a gumball (suggested by Jade)
-        reward.iType = 7;
-        reward.iID = 119 + (rand() % 3);
-        reward.iOpt = 1;
-    }
-
-    return reward;
-}
-
-Crate ItemManager::getCrate(int crateId) {
-    if (Crates.find(crateId) == Crates.end())
-        throwError(sprintf(buffer, "Crate %d was not found!", crateId));
-    return Crates[crateId];
-}
-
-int ItemManager::getItemSetId(Crate crate, int crateId) {
     int itemSetsCount = crate.itemSets.size();
-    if (itemSetsCount == 0)
+    if (itemSetsCount == 0) {
-        throwError(sprintf(buffer, "Crate %d has no item sets assigned?!", crateId));
+        std::cout << "[WARN] Crate " << crateId << " has no item sets assigned?!" << std::endl;
+        return -1;
+    }
 
     // if crate points to multiple itemSets, choose a random one
     int itemSetIndex = rand() % itemSetsCount;
     return crate.itemSets[itemSetIndex];
 }
 
-int ItemManager::getRarity(Crate crate , int itemSetId) {
+int ItemManager::getRarity(Crate& crate, int itemSetId) {
     // find rarity ratio
-    if (RarityRatios.find(crate.rarityRatioId) == RarityRatios.end())
+    if (RarityRatios.find(crate.rarityRatioId) == RarityRatios.end()) {
-        throwError(sprintf(buffer, "Rarity Ratio %d not found!", crate.rarityRatioId));
+        std::cout << "[WARN] Rarity Ratio " << crate.rarityRatioId << " not found!" << std::endl;
+        return -1;
+    }
 
     std::vector<int> rarityRatio = RarityRatios[crate.rarityRatioId];
 
@@ -905,7 +913,7 @@ int ItemManager::getRarity(Crate crate , int itemSetId) {
      * it is simpler to do here than to fix individually in the file
      */
 
-    // remember that rarities start from 1 !
+    // remember that rarities start from 1!
     for (int i = 0; i < rarityRatio.size(); i++){
         if (CrateItems.find(std::make_pair(itemSetId, i+1)) == CrateItems.end())
             rarityRatio[i] = 0;
@@ -915,9 +923,10 @@ int ItemManager::getRarity(Crate crate , int itemSetId) {
     for (int value : rarityRatio)
         total += value;
 
-    // if we didn't find any items, throw exception
+    if (total == 0) {
-    if (total == 0)
+        std::cout << "Item Set " << itemSetId << " has no items assigned?!" << std::endl;
-        throwError(sprintf(buffer, "Item Set %d has no items assigned?!", itemSetId));
+        return -1;
+    }
 
     // now return a random rarity number
     int randomNum = rand() % total;
@@ -931,11 +940,13 @@ int ItemManager::getRarity(Crate crate , int itemSetId) {
     return rarity;
 }
 
-sItemBase ItemManager::getCrateItem(int itemSetId, int rarity, int playerGender) {
+int ItemManager::getCrateItem(sItemBase& result, int itemSetId, int rarity, int playerGender) {
     std::pair key = std::make_pair(itemSetId, rarity);
 
-    if (CrateItems.find(key) == CrateItems.end())
+    if (CrateItems.find(key) == CrateItems.end()) {
-        throwError(sprintf(buffer, "Item Set ID %d Rarity %d items have not been found", itemSetId, rarity));
+        std::cout << "[WARN] Item Set ID " << itemSetId << " Rarity " << rarity << " items have not been found" << std::endl;
+        return -1;
+    }
 
     // only take into account items that have correct gender
     std::vector<std::map<std::pair<int32_t, int32_t>, Item>::iterator> items;
@@ -948,20 +959,19 @@ sItemBase ItemManager::getCrateItem(int itemSetId, int rarity, int playerGender)
         items.push_back(crateitem);
     }
 
-    if (items.size() == 0)
+    if (items.size() == 0) {
-        throwError(sprintf(buffer, "Gender inequality! Set ID %d Rarity %d contains only %s items?!", itemSetId, rarity, playerGender==2 ? "boys" : "girls"));
+        std::cout << "[WARN] Gender inequality! Set ID " << itemSetId << " Rarity " << rarity << " contains only "
+                  << (playerGender == 2 ? "boys" : "girls") << " items?!" << std::endl;
+        return -1;
+    }
+
     auto item = items[rand() % items.size()];
-    sItemBase result = {};
+
     result.iID = item->first.first;
     result.iType = item->first.second;
     result.iOpt = 1;
 
-    return result;
+    return 0;
-}
-
-// argument is here only so we can call sprintf in brackets
-void ItemManager::throwError(int ignore) {
-    throw buffer;
 }
 
 // TODO: use this in cleaned up ItemManager

src/ItemManager.hpp

@@ -56,12 +56,9 @@ namespace ItemManager {
     void chestOpenHandler(CNSocket* sock, CNPacketData* data);
 
     // crate opening logic with all helper functions
-    sItemBase openCrate(int crateId, int playerGender);
+    int getItemSetId(Crate& crate, int crateId);
-    Crate getCrate(int crateId);
+    int getRarity(Crate& crate, int itemSetId);
-    int getItemSetId(Crate crate, int crateId);
+    int getCrateItem(sItemBase& reward, int itemSetId, int rarity, int playerGender);
-    int getRarity(Crate crate, int itemSetId);
-    sItemBase getCrateItem(int itemSetId, int rarity, int playerGender);
-    void throwError(int ignore);
 
     int findFreeSlot(Player *plr);
     Item* getItemData(int32_t id, int32_t type);

src/MobManager.cpp

@@ -11,9 +11,10 @@
 #include <assert.h>
 
 std::map<int32_t, Mob*> MobManager::Mobs;
+std::queue<int32_t> MobManager::RemovalQueue;
+
 std::map<int32_t, MobDropChance> MobManager::MobDropChances;
 std::map<int32_t, MobDrop> MobManager::MobDrops;
-std::queue<int32_t> MobManager::RemovalQueue;
 
 bool MobManager::simulateMobs;
 
@@ -168,7 +169,7 @@ void MobManager::giveReward(CNSocket *sock, Mob* mob) {
         return;
     }
     // find correct mob drop
-    MobDrop drop = MobDrops[mob->dropType];
+    MobDrop& drop = MobDrops[mob->dropType];
 
     plr->money += drop.taros;
     // formula for scaling FM with player/mob level difference
@@ -197,29 +198,27 @@ void MobManager::giveReward(CNSocket *sock, Mob* mob) {
     reward->iFatigue_Level = 1;
     reward->iItemCnt = 1; // remember to update resplen if you change this
 
-
     int slot = ItemManager::findFreeSlot(plr);
 
     bool awardDrop = false;
-    MobDropChance chance;
+    MobDropChance *chance = nullptr;
     // sanity check
-    if (MobDropChances.find(drop.dropChanceType) == MobDropChances.end())
+    if (MobDropChances.find(drop.dropChanceType) == MobDropChances.end()) {
         std::cout << "[WARN] Unknown Drop Chance Type: " << drop.dropChanceType << std::endl;
-    else {
+        return; // this also prevents holiday crate drops, but oh well
-        chance = MobDropChances[drop.dropChanceType];
+    } else {
-        awardDrop = (rand() % 1000 < chance.dropChance);
+        chance = &MobDropChances[drop.dropChanceType];
+        awardDrop = (rand() % 1000 < chance->dropChance);
     }
 
-
     // no drop
     if (slot == -1 || !awardDrop) {
-
         // no room for an item, but you still get FM and taros
         reward->iItemCnt = 0;
         sock->sendPacket((void*)respbuf, P_FE2CL_REP_REWARD_ITEM, sizeof(sP_FE2CL_REP_REWARD_ITEM));
     } else {
         // item reward
-        item->sItem = getReward(&drop, &chance);
+        getReward(&item->sItem, &drop, chance);
         item->iSlotNum = slot;
         item->eIL = 1; // Inventory Location. 1 means player inventory.
 
@@ -227,7 +226,6 @@ void MobManager::giveReward(CNSocket *sock, Mob* mob) {
         plr->Inven[slot] = item->sItem;
 
         sock->sendPacket((void*)respbuf, P_FE2CL_REP_REWARD_ITEM, resplen);
-
     }
 
     // event crates
@@ -235,10 +233,9 @@ void MobManager::giveReward(CNSocket *sock, Mob* mob) {
         giveEventReward(sock, plr);
 }
 
-sItemBase MobManager::getReward(MobDrop* drop, MobDropChance* chance) {
+void MobManager::getReward(sItemBase *reward, MobDrop* drop, MobDropChance* chance) {
-    sItemBase reward = {};
+    reward->iType = 9;
-    reward.iType = 9;
+    reward->iOpt = 1;
-    reward.iOpt = 1;
 
     int total = 0;
     for (int ratio : chance->cratesRatio)
@@ -249,29 +246,26 @@ sItemBase MobManager::getReward(MobDrop* drop, MobDropChance* chance) {
     int i = 0;
     int sum = 0;
     do {
-        reward.iID = drop->crateIDs[i];        
+        reward->iID = drop->crateIDs[i];
         sum += chance->cratesRatio[i];
         i++;
     }
     while (sum<=randomNum);
-    return reward;
 }
 
 void MobManager::giveEventReward(CNSocket* sock, Player* player) {
-
     // random drop chance
     if (rand() % 100 > settings::EVENTCRATECHANCE)
         return;
-    // no slot = no award
+    // no slot = no reward
     int slot = ItemManager::findFreeSlot(player);
     if (slot == -1)
         return;
 
     const size_t resplen = sizeof(sP_FE2CL_REP_REWARD_ITEM) + sizeof(sItemReward);
     assert(resplen < CN_PACKET_BUFFER_SIZE - 8);
-    // we know it's only one trailing struct, so we can skip full validation
 
-    uint8_t respbuf[resplen]; // not a variable length array, don't worry
+    uint8_t respbuf[resplen];
     sP_FE2CL_REP_REWARD_ITEM* reward = (sP_FE2CL_REP_REWARD_ITEM*)respbuf;
     sItemReward* item = (sItemReward*)(respbuf + sizeof(sP_FE2CL_REP_REWARD_ITEM));
 

src/MobManager.hpp

@@ -43,7 +43,7 @@ struct Mob : public BaseNPC {
     time_t nextAttack = 0;
     int roamX, roamY, roamZ;
 
-    //drop
+    // drop
     int dropType;
 
     // temporary; until we're sure what's what
@@ -129,7 +129,7 @@ namespace MobManager {
     int hitMob(CNSocket *sock, Mob *mob, int damage);
     void killMob(CNSocket *sock, Mob *mob);
     void giveReward(CNSocket *sock, Mob *mob);
-    sItemBase getReward(MobDrop *drop, MobDropChance *chance);
+    void getReward(sItemBase *reward, MobDrop *drop, MobDropChance *chance);
     void giveEventReward(CNSocket* sock, Player* player);
 
     std::pair<int,int> lerp(int, int, int, int, int);

src/TableData.cpp

@@ -354,7 +354,9 @@ void TableData::loadDrops() {
             toAdd.boosts = (int)drop["Boosts"];
             MobManager::MobDrops[(int)drop["DropType"]] = toAdd;
         }
+
         std::cout << "[INFO] Loaded " << MobManager::MobDrops.size() << " Mob Drop Types"<<  std::endl;
+
         // Rarity Ratios
         nlohmann::json rarities = dropData["RarityRatios"];
         for (nlohmann::json::iterator _rarity = rarities.begin(); _rarity != rarities.end(); _rarity++) {
@@ -365,6 +367,7 @@ void TableData::loadDrops() {
             }
             ItemManager::RarityRatios[(int)rarity["Type"]] = toAdd;
         }
+
         // Crates
         nlohmann::json crates = dropData["Crates"];
         for (nlohmann::json::iterator _crate = crates.begin(); _crate != crates.end(); _crate++) {
@@ -376,6 +379,7 @@ void TableData::loadDrops() {
             }
             ItemManager::Crates[(int)crate["Id"]] = toAdd;
         }
+
         // Crate Items
         nlohmann::json items = dropData["Items"];
         int itemCount = 0;
@@ -383,27 +387,29 @@ void TableData::loadDrops() {
             auto item = _item.value();
             std::pair<int32_t, int32_t> itemSetkey = std::make_pair((int)item["ItemSet"], (int)item["Rarity"]);
             std::pair<int32_t, int32_t> itemDataKey = std::make_pair((int)item["Id"], (int)item["Type"]);
+
             if (ItemManager::ItemData.find(itemDataKey) == ItemManager::ItemData.end())
             {
                 char buff[255];
                 sprintf(buff, "Unknown item with Id %d and Type %d", (int)item["Id"], (int)item["Type"]);
                 throw TableException(std::string(buff));
             }
+
             std::map<std::pair<int32_t, int32_t>, Item>::iterator toAdd = ItemManager::ItemData.find(itemDataKey);
+
             // if item collection doesn't exist, start a new one
             if (ItemManager::CrateItems.find(itemSetkey) == ItemManager::CrateItems.end()) {
                 std::vector<std::map<std::pair<int32_t, int32_t>, Item>::iterator> vector;
                 vector.push_back(toAdd);
                 ItemManager::CrateItems[itemSetkey] = vector;
-            }
+            } else // else add a new element to existing collection
-            // else add a new element to existing collection
-            else
                 ItemManager::CrateItems[itemSetkey].push_back(toAdd);
+
             itemCount++;
         }
 
         std::cout << "[INFO] Loaded " << ItemManager::Crates.size() << " Crates containing "
-            <<itemCount<<" items" << std::endl;
+                  << itemCount << " items" << std::endl;
 
     }
     catch (const std::exception& err) {

src/main.cpp

@@ -103,11 +103,15 @@ int main() {
     GroupManager::init();
     Database::open();
 
-    switch (settings::EVENTMODE)
+    switch (settings::EVENTMODE) {
-    {
+    case 0: break; // no event
     case 1: std::cout << "[INFO] Event active. Hey, Hey It's Knishmas!" << std::endl; break;
     case 2: std::cout << "[INFO] Event active. Wishing you a spook-tacular Halloween!" << std::endl; break;
     case 3: std::cout << "[INFO] Event active. Have a very hoppy Easter!" << std::endl; break;
+    default:
+        std::cout << "[FATAL] Unknown event set in config file." << std::endl;
+        terminate(0);
+        /* not reached */
     }
 
     std::cout << "[INFO] Starting Server Threads..." << std::endl;

tdata

@@ -1 +1 @@
-Subproject commit b9a74bd8145f093b7fa8aef8b74191ac672d3dd2
+Subproject commit ab1dd0e4398a5b96a9449032aafaaf4e24800283