feat: gacha

src/server/packets/DoGachaCsReq.ts

@@ -0,0 +1,35 @@
+import { DoGachaCsReq, DoGachaScRsp, GachaItem, Item, ItemList } from "../../data/proto/StarRail";
+import Banners from "../../util/Banner";
+import Packet from "../kcp/Packet";
+import Session from "../kcp/Session";
+
+export default async function handle(session: Session, packet: Packet) {
+    const gachaItemList: GachaItem[] = [];
+    const body = packet.body as DoGachaCsReq;
+    const banner = Banners.config.find(banner => banner.gachaId === body.gachaId)!;
+    const combined = banner.rateUpItems4.concat(banner.rateUpItems5)
+    //bad gachaing but whatever....
+    //TODO: pity system, proper logic
+    for(let i = 0; i < body.gachaNum; i++){
+        const result = combined[Math.floor(Math.random() * combined.length)];
+        gachaItemList.push({
+            gachaItem: {
+                itemId: result,
+                num: 1
+            } as Item,
+            tokenItem: {},
+            transferItemList: {},
+            isNew: true //TODO: avatar checking
+        } as GachaItem);
+    }
+    session.send("DoGachaScRsp", {
+        retcode: 0,
+        gachaId: body.gachaId!,
+        gachaNum: body.gachaNum!,
+        newGachaRandom: body.gachaRandom!,
+        newbieGachaCnt: 0,
+        todayGachaCnt: 0,
+        todayTotalGachaCnt: 0, //todo find out what are THESE
+        gachaItemList: gachaItemList
+    } as DoGachaScRsp);
+}

src/util/Banner.ts

@@ -23,7 +23,7 @@ export default class Banners {
 
     private static readConfig(){
         let config: Banner[];
-        let defaultConfig: Banner[] = [
+        const defaultConfig: Banner[] = [
             {
                 gachaId: 1001,
                 detailWebview: "",
@@ -40,7 +40,7 @@ export default class Banners {
         try {
             config = JSON.parse(r('../../banners.json'));
             
-            for(let [index, gachaBanner] of Object.entries(config)){
+            for(const [index, gachaBanner] of Object.entries(config)){
                 const missing = Object.keys(defaultConfig[0]).filter(key => !gachaBanner.hasOwnProperty(key));
                 if (missing.length > 0) {
                     console.log(`Missing ${missing.join(', ')}, using default values. Backup of your older config: ${JSON.stringify(gachaBanner, null, 2)}`);