Update Healer Man server

scripts/spellDbcEquipmentMetadata.mjs

@@ -0,0 +1,30 @@
+const ITEM_CLASS_FIELD = 68;
+const ITEM_SUBCLASS_MASK_FIELD = 69;
+const ITEM_INVENTORY_MASK_FIELD = 70;
+
+/** Read equipped-item metadata from a client Spell.dbc using its fixed fields. */
+export function spellDbcEquipmentMetadata(buffer) {
+  if (!Buffer.isBuffer(buffer) || buffer.toString("ascii", 0, 4) !== "WDBC") {
+    throw new Error("Spell.dbc is not WDBC data");
+  }
+  const recordCount = buffer.readUInt32LE(4);
+  const fieldCount = buffer.readUInt32LE(8);
+  const recordSize = buffer.readUInt32LE(12);
+  if (fieldCount <= ITEM_INVENTORY_MASK_FIELD || recordSize < fieldCount * 4
+    || buffer.length < 20 + recordCount * recordSize) {
+    throw new Error("Spell.dbc has an unsupported equipped-item schema");
+  }
+
+  const rows = new Map();
+  for (let index = 0; index < recordCount; index += 1) {
+    const base = 20 + index * recordSize;
+    const id = buffer.readUInt32LE(base);
+    if (rows.has(id)) throw new Error(`Spell.dbc repeats spell ID ${id}`);
+    rows.set(id, {
+      equippedItemClass: buffer.readInt32LE(base + ITEM_CLASS_FIELD * 4),
+      equippedItemSubclassMask: buffer.readInt32LE(base + ITEM_SUBCLASS_MASK_FIELD * 4),
+      equippedItemInventoryMask: buffer.readUInt32LE(base + ITEM_INVENTORY_MASK_FIELD * 4),
+    });
+  }
+  return rows;
+}