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Novel open replacement for AzerothCore-style npc_trainer +
npc_vendor SQL tables PLUS the Blizzard TrainerSpells.dbc
family. The 22nd open format added to the editor.
Unifies trainer spell lists and vendor item inventories
into one per-NPC entry. A creature flagged Trainer or
Vendor in WCRT references a WTRN entry that lists what they
teach / sell. The same NPC can be both — kindMask is a
bitmask covering the Trainer (0x01) and Vendor (0x02) kinds.
This format closes a major cross-format gap: WCRT.npcFlags
already had Vendor / Trainer bits, but until now there was
no format defining what a vendor sells or what a trainer
teaches. Now an NPC marked Vendor in WCRT has a real
inventory, and an NPC marked Trainer has a real spell list.
Cross-references — every WTRN field has a real format target:
WTRN.entry.npcId -> WCRT.entry.creatureId
WTRN.spell.spellId -> WSPL.entry.spellId
WTRN.spell.requiredSkillId -> WSKL.entry.skillId
WTRN.item.itemId -> WIT.entry.itemId
Format:
• magic "WTRN", version 1, little-endian
• per NPC: npcId / kindMask / greeting + spells[] + items[]
• per spell offer: spellId / moneyCostCopper /
requiredSkillId / requiredSkillRank / requiredLevel
• per item offer: itemId / stockCount (0xFFFFFFFF =
unlimited) / restockSec / extendedCost / moneyCostCopper
(0 = inherit from WIT.buyPrice)
API: WoweeTrainerLoader::save / load / exists / findByNpc;
presets makeStarter (innkeeper 4001 as both trainer +
vendor: teaches First Aid + sells starter items),
makeMageTrainer (NPC 4003 teaches the WSPL mage spells
at scaling cost), makeWeaponVendor (NPC 4002 sells WIT
weapons with mixed unlimited/finite stock + restock timers).
CLI added (5 flags, 551 documented total now):
--gen-trainers / --gen-trainers-mage / --gen-trainers-weapons
--info-wtrn / --validate-wtrn
Validator catches: npcId=0 + duplicates, kindMask=0 (NPC
offers nothing), Trainer flag without spells, Vendor flag
without items, spells/items present without the matching
kind bit (silently ignored at runtime), spellId=0 / itemId=0
in offers, finite stock with restockSec=0 (single-fill —
usually intentional but worth surfacing).
The 3 presets deliberately use npcIds matching WCRT village
merchants (4001/4002/4003) so the demo content stack is
self-consistent: WCRT 4001 has the Vendor + Trainer flag,
and WTRN 4001 actually defines what they sell and teach.
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