feat: 商店系统实现

packages-user/data-system/src/shop/shop.ts

@@ -0,0 +1,104 @@
+import {
+    IShopManager,
+    IHeroState,
+    IShopState,
+    IStateBase
+} from '@user/data-base';
+import { IShopHeroAttr, IShopSystem, ShopTradeResult } from './types';
+import { logger } from '@motajs/common';
+import { isNil } from 'lodash-es';
+import { shouldReplay } from '@user/data-common';
+
+export class ShopSystem implements IShopSystem {
+    manager: IShopManager | null = null;
+    hero: IHeroState<IShopHeroAttr> | null = null;
+
+    private current: IShopState | null = null;
+
+    constructor(readonly state: IStateBase) {}
+
+    bindManager(manager: IShopManager | null): void {
+        this.closeShop();
+        this.manager = manager;
+    }
+
+    bindHero(hero: IHeroState<IShopHeroAttr> | null): void {
+        this.closeShop();
+        this.hero = hero;
+    }
+
+    @shouldReplay('Openning shop should be replayed.')
+    openShop(shop: IShopState): void {
+        this.current = shop;
+    }
+
+    getCurrentShop(): IShopState | null {
+        return this.current;
+    }
+
+    @shouldReplay('Closing shop should be replayed.')
+    closeShop(): void {
+        this.current = null;
+    }
+
+    @shouldReplay('Buying items should be replayed.')
+    buyItem(item: number | string, count: number): ShopTradeResult {
+        if (!this.current || !this.hero) {
+            logger.warn(199);
+            return ShopTradeResult.Invalid;
+        }
+        const num = this.state.tileStore.num(item);
+        if (isNil(num)) {
+            logger.warn(200, item.toString());
+            return ShopTradeResult.Invalid;
+        }
+
+        const shop = this.current;
+        const hero = this.hero.getModifiableAttribute();
+
+        const currCount = shop.getCount(count);
+        if (currCount < count) return ShopTradeResult.ShopLack;
+
+        const [buyPrice] = shop.getPrice(num);
+        if (buyPrice < 0) {
+            return ShopTradeResult.Invalid;
+        }
+        const need = buyPrice * count;
+        const owned = hero.getBaseAttribute('money');
+        if (owned < need) {
+            return ShopTradeResult.MoneyLack;
+        }
+
+        hero.add('money', -need);
+        shop.addItem(num, -count);
+        return ShopTradeResult.Success;
+    }
+
+    sellItem(item: number | string, count: number): ShopTradeResult {
+        if (!this.current || !this.hero) {
+            logger.warn(199);
+            return ShopTradeResult.Invalid;
+        }
+        const num = this.state.tileStore.num(item);
+        if (isNil(num)) {
+            logger.warn(200, item.toString());
+            return ShopTradeResult.Invalid;
+        }
+
+        const shop = this.current;
+        const hero = this.hero.getModifiableAttribute();
+        const pack = this.hero.items;
+
+        const currCount = pack.itemCount(num);
+        if (currCount < count) return ShopTradeResult.HeroLack;
+
+        const [, sellPrice] = shop.getPrice(num);
+        if (sellPrice < 0) {
+            return ShopTradeResult.Invalid;
+        }
+        const need = sellPrice * count;
+        hero.add('money', need);
+        shop.addItem(num, count);
+        return ShopTradeResult.Success;
+    }
+}

packages-user/data-system/src/shop/types.ts

@@ -1,16 +1,39 @@
-import { IHeroState, IShopManager, IShopState } from '@user/data-base';
+import {
+    IDataBaseExtended,
+    IHeroState,
+    IShopManager,
+    IShopState
+} from '@user/data-base';
 
 export interface IShopHeroAttr {
     /** 勇士拥有的金币 */
     money: number;
 }
 
-export interface IShopSystem {
+export const enum ShopTradeResult {
+    /** 成功购入或售出 */
+    Success,
+    /** 操作不合法，一般是因为道具不存在或未打开商店 */
+    Invalid,
+    /** 商店库存不足，无法购入这么多道具 */
+    ShopLack,
+    /** 玩家库存不足，无法卖出这么多道具 */
+    HeroLack,
+    /** 玩家货币不足，无法购入这么多道具 */
+    MoneyLack
+}
+
+export interface IShopSystem extends IDataBaseExtended {
+    /** 当前使用的商店管理器 */
+    readonly manager: IShopManager | null;
+    /** 当前绑定的勇士状态对象 */
+    readonly hero: IHeroState<IShopHeroAttr> | null;
+
     /**
      * 绑定商店管理器
      * @param manager 商店管理器
      */
-    bindManager(manager: IShopManager): void;
+    bindManager(manager: IShopManager | null): void;
 
     /**
      * 绑定系统使用的勇士状态对象
@@ -24,6 +47,11 @@ export interface IShopSystem {
      */
     openShop(shop: IShopState): void;
 
+    /**
+     * 获取当前已打开的商店状态对象
+     */
+    getCurrentShop(): IShopState | null;
+
     /**
      * 关闭当前打开的商店
      */
@@ -34,12 +62,12 @@ export interface IShopSystem {
      * @param item 道具数字或 id
      * @param count 购买的道具数量
      */
-    buyItem(item: number | string, count: number): void;
+    buyItem(item: number | string, count: number): ShopTradeResult;
 
     /**
      * 在当前打开的商店里面售出指定道具
      * @param item 道具数字或 id
      * @param count 卖出的道具数量
      */
-    sellItem(item: number | string, count: number): void;
+    sellItem(item: number | string, count: number): ShopTradeResult;
 }