团购：基础接口

shared/domain/activityField/groupShopField.ts

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+import { ActivityModelType } from '../../db/Activity';
+import { ActivityGroupShopRecType } from '../../db/ActivityGroupShopRec';
+import { ActivityGroupShopUserRecType } from '../../db/ActivityGroupShopUserRec';
+import { ActivityBase } from './activityField';
+
+// 数据库
+interface GroupShopTimerInDb {
+    time: number;     // 活动开始之后的时间
+    sum: number;      // 如果次数不足sum次则强行设成sum次
+}
+
+interface GroupShopDiscountInDb {
+    id: number;        // 折扣id
+    sum: number;       // 累计购买次数 
+    discount: number;  // 显示折扣
+    price: number;     // 真实价格
+}
+
+interface GroupShopItemInDb {
+    id: number;       // 唯一id
+    gid: number;      // 物品id
+    count: number;    // 一次购买能购买多少
+    max: number;      // 单人可以购买多少次
+    price: number;    // 无折扣单价
+    discount: GroupShopDiscountInDb[];
+    timers: GroupShopTimerInDb[]; // 定时器
+}
+
+interface GroupShopInDb {
+    items: GroupShopItemInDb[];
+}
+
+// 数据
+class GroupShopTimer {
+    time: number;     // 活动开始之后的时间
+    itemId: number;   // items唯一id
+    sum: number;      // 如果次数不足sum次则强行设成sum次
+    
+    constructor(id: number, data: GroupShopTimerInDb) {
+        this.time = data.time;
+        this.sum = data.sum;
+        this.itemId = id;
+    }
+}
+
+export class GroupShopDiscount {
+    id: number = 0;        // 折扣唯一id
+    sum: number = 0;       // 累计购买次数 
+    discount: number = 0;  // 显示折扣
+    price: number = 0;     // 真实价格
+
+    constructor(price: number, data?: GroupShopDiscountInDb) {
+        if(data) {
+            this.id = data.id;
+            this.sum = data.sum;
+            this.discount = data.discount;
+            this.price = data.price;
+        } else {
+            this.price = price;
+        }
+    }
+}
+
+class GroupShopItem {
+    id: number;            // 唯一id
+    gid: number;           // 物品id
+    count: number;         // 一次购买能购买多少
+    max: number;           // 单人可以购买多少次
+    price: number;         // 无折扣单价
+    discount: GroupShopDiscount[] = [];
+    sum: number = 0;       // 总价格
+    curDiscount: GroupShopDiscount;
+    hasBoughtCnt: number = 0;  // 玩家购买次数
+
+    constructor(item: GroupShopItemInDb) {
+        this.id = item.id;
+        this.gid = item.gid;
+        this.count = item.count;
+        this.max = item.max;
+        this.price = item.price;
+        if(item.discount && item.discount.length > 0) {
+            for(let discount of item.discount) {
+                this.discount.push(new GroupShopDiscount(item.price, discount));
+            }
+        }
+    }
+    
+    setSum(sum: number) {
+        this.sum = sum;
+        this.checkDiscountBySum(sum);
+    }
+
+    checkDiscountBySum(sum: number) {
+        for(let obj of this.discount) {
+            if(obj.sum > sum) break;
+            this.curDiscount = new GroupShopDiscount(this.price, obj);
+        }
+    }
+
+    setPlayerCnt(cnt: number) {
+        this.hasBoughtCnt += cnt;
+    }
+
+    checkBuyCnt(buyCnt: number) {
+        return this.hasBoughtCnt + buyCnt <= this.max;
+    }
+
+    getCurDiscount() {
+        return this.curDiscount? this.curDiscount: new GroupShopDiscount(this.price);
+    }
+}
+
+// 团购活动数据
+export class GroupShopData extends ActivityBase {
+    items: GroupShopItem[] = [];
+    timer: GroupShopTimer[] = [];
+    private itemMap: Map<number, number> = new Map(); // id => index
+    
+    constructor(activityData: ActivityModelType, createTime: number, serverTime: number) {
+        super(activityData, createTime, serverTime);
+        this.initData(activityData.data)
+    }
+
+    public initData(data: string) {
+        let dataObj: GroupShopInDb = JSON.parse(data);
+        if(!dataObj.items || dataObj.items.length <= 0) return;
+
+        for(let item of dataObj.items) {
+            this.items.push(new GroupShopItem(item));
+            this.itemMap.set(item.id, this.items.length - 1);
+            if(item.timers && item.timers.length > 0) {
+                for(let timer of item.timers) {
+                    this.timer.push(new GroupShopTimer(item.id, timer));
+                }
+            }
+        }
+    }
+
+    public findItemById(id: number) {
+        let index = this.itemMap.get(id);
+        return this.items[index];
+    }
+
+    public setRecords(data: ActivityGroupShopRecType[]) {
+        for(let { id, sum } of data) {
+            let item = this.findItemById(id);
+            if(item) item.setSum(sum);
+        }
+    }
+
+    public incAllRecord(data: ActivityGroupShopRecType) {
+        if(!data) return false;
+        let item = this.findItemById(data.id);
+        let oldDiscountId = item.getCurDiscount().id;
+        item.setSum(data.sum);
+        let newDiscountId = item.getCurDiscount().id;
+        return oldDiscountId != newDiscountId;
+    }
+
+
+    public setPlayerRecord(data: ActivityGroupShopUserRecType[]) {
+        for(let { id, buyCnt } of data) {
+            let item = this.findItemById(id);
+            if(item) item.setPlayerCnt(buyCnt);
+        }
+    }
+    public getShowResult() {
+        return {
+            ...this.getBaseKeys(),
+            items: this.items,
+        }
+    }
+
+}