Add LoadGeneralRewardResponse notes

Mapped this out while investigating an issue that turned out to be
unrelated, may as well check in my findings.

src/idz/encoder/loadGeneralReward.ts

@@ -1,10 +1,29 @@
+import iconv = require("iconv-lite");
+
 import { LoadGeneralRewardResponse } from "../response/loadGeneralReward";
 
-// A generic response is acceptable too so why even bother with this..
 export function loadGeneralReward(res: LoadGeneralRewardResponse) {
   const buf = Buffer.alloc(0x0330);
 
   buf.writeInt16LE(0x009d, 0x0000);
 
+  // Traversal code shat out by MSVC uses shifted pointers and neither the
+  // beginning nor the end of each entry in this array gets read, so the true
+  // start of the array and offsets of each item's fields are still uncertain.
+
+  for (let i = 0; i < 10 && i < res.items.length; i++) {
+    const item = res.items[i];
+    const base = 0x04 + 0x50 * i;
+
+    iconv.encode(item.field_04, "shift_jis").copy(buf, base + 0x04);
+    buf.writeUInt32LE(item.field_2C, base + 0x2c);
+    buf.writeUInt8(item.field_38, base + 0x38);
+    buf.writeUInt8(item.field_39, base + 0x39);
+
+    for (let j = 0; j < 4 && j < item.field_3C.length; j++) {
+      buf.writeUInt32LE(item.field_3C[j], base + 0x3c + 4 * j);
+    }
+  }
+
   return buf;
 }

src/idz/handler/loadGeneralReward.ts

@@ -1,11 +1,12 @@
 import { LoadGeneralRewardRequest } from "../request/loadGeneralReward";
 import { GenericResponse } from "../response/generic";
+import { LoadGeneralRewardResponse } from "../response/loadGeneralReward";
 import { World } from "../world";
 
 export function loadGeneralReward(
   w: World,
   req: LoadGeneralRewardRequest
-): GenericResponse {
+): LoadGeneralRewardResponse | GenericResponse {
   // A non-generic response is also accepted, but why bother
   return { type: "generic_res" };
 }

src/idz/response/loadGeneralReward.ts

@@ -1,4 +1,12 @@
+export interface LoadGeneralRewardItem {
+  field_04: string; // 40 chars max
+  field_2C: number; // payload?
+  field_38: number; // u8
+  field_39: number; // u8
+  field_3C: number[]; // u32 * 4
+}
+
 export interface LoadGeneralRewardResponse {
   type: "load_general_reward_res";
-  // TODO
+  items: LoadGeneralRewardItem[];
 }