gacha: implementation #2 (#27)

Co-authored-by: labalityowo <56186498+labalityowo@users.noreply.github.com>

.gitignore

@@ -109,4 +109,5 @@ dist
 
 # CrepeSR
 config.json
-src/data/*
+src/data/*
+banners.json

src/index.ts

@@ -6,11 +6,13 @@
 import Interface from "./commands/Interface";
 import HttpServer from "./http/HttpServer";
 import SRServer from "./server/kcp/SRServer";
+import Banners from "./util/Banner";
 import Logger from "./util/Logger";
 import ProtoFactory from "./util/ProtoFactory"
 
 const c = new Logger("CrepeSR");
 c.log(`Starting CrepeSR...`);
+Banners.init();
 ProtoFactory.init();
 Interface.start();
 HttpServer.getInstance().start();

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/server/packets/GetGachaInfoCsReq.ts

@@ -1,21 +1,22 @@
-import { GetGachaInfoScRsp } from "../../data/proto/StarRail";
+import { GachaInfo, GetGachaInfoCsReq, GetGachaInfoScRsp } from "../../data/proto/StarRail";
 import Packet from "../kcp/Packet";
 import Session from "../kcp/Session";
-
-const unix = () => Math.floor(Date.now() / 1000);
+import Banner from './../../util/Banner';
 
 export default async function handle(session: Session, packet: Packet) {
     session.send("GetGachaInfoScRsp", {
-        gachaRandom: 2503,
+        gachaRandom: 0,
         retcode: 0,
-        gachaInfoList: [{
-            beginTime: unix(),
-            endTime: unix() * 2,
-            newbieGachaCnt: 10,
-            todayGachaCnt: 10,
-            gachaId: 1001, // TODO: Figure out gachaIDs
-            detailWebview: "https://omfgdogs.com/"
-        }],
+        gachaInfoList: Banner.config.map(banner => {
+            return {
+                beginTime: 0,
+                endTime: 1924992000,
+                gachaId: banner.gachaId,
+                detailWebview: banner.detailWebview,
+                newbieGachaCnt: 0,
+                todayGachaCnt: 0
+            } as GachaInfo
+        }),
         todaySingleGachaMaxCnt: 10,
         todayTotalGachaCnt: 10,
     } as GetGachaInfoScRsp);

src/util/Banner.ts

@@ -0,0 +1,61 @@
+import fs from 'fs';
+import { resolve } from 'path';
+import { VerboseLevel } from './Logger';
+
+type Banner = {
+    gachaId: number,
+    detailWebview: string,
+    rateUpItems4: number[],
+    rateUpItems5: number[],
+    costItemId: number
+}
+
+function r(...args: string[]) {
+    return fs.readFileSync(resolve(__dirname, ...args)).toString();
+}
+
+export default class Banners {
+    public static config: Banner[];
+
+    public static init(){
+        Banners.readConfig();
+    }
+
+    private static readConfig(){
+        let config: Banner[];
+        const defaultConfig: Banner[] = [
+            {
+                gachaId: 1001,
+                detailWebview: "",
+                rateUpItems4: [
+                    1001, 1103
+                ],
+                rateUpItems5: [
+                    1102
+                ],
+                costItemId: -1 //unused for now
+            } as Banner
+        ];
+
+        try {
+            config = JSON.parse(r('../../banners.json'));
+            
+            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)}`);
+                    config[parseInt(index)] = defaultConfig[0];
+                }
+            }
+            Banners.updateConfig(config);
+        } catch {
+            console.error("Could not read banners file. Creating one for you...");
+            Banners.updateConfig(defaultConfig);
+        }
+    }
+    
+    private static updateConfig(config: Banner[]) {
+        this.config = config;
+        fs.writeFileSync('./banners.json', JSON.stringify(config, null, 2));
+    }
+}