feat: 新增購買月卡功能

新增了一個用女神石購買月卡的功能，讓使用者可以購買不同數量的月卡。購買成功後，會生成對應數量的月卡序號，並將序號發送給使用者。

app/locales/zh_tw.json

@@ -242,7 +242,10 @@
       "effects": {
         "gacha_times": "每日單抽次數",
         "daily_ration": "每日寶石"
-      }
+      },
+      "not_enough_money": "女神石不足，無法購買月卡",
+      "buy_month_card_success": "成功購買月卡，以下是您的月卡序號，請複製再發送此訊息",
+      "give_serial_nubmer": "#訂閱兌換 {{ serial_number }}"
     },
     "gacha": {
       "not_enough_stone": "女神石不足，無法花錢進行特別抽取",

app/src/app.js

@@ -163,6 +163,7 @@ async function OrderBased(context, { next }) {
     ...ScratchCardController.router,
     ...NumberController.router,
     ...(type === "user" ? JobController.router : []),
+    ...(type === "user" ? SubscribeController.privateRouter : []),
     text(/^[/#.](使用說明|help)$/, welcome),
     text(/^[/#.]抽(\*(?<times>\d+))?(\s*(?<tag>[\s\S]+))?$/, gacha.play),
     text(/^[/#.]消耗抽(\*(?<times>\d+))?(\s*(?<tag>[\s\S]+))?$/, (context, props) =>

app/src/controller/application/SubscribeController.js

@@ -1,8 +1,10 @@
 const { text } = require("bottender/router");
 const { get } = require("lodash");
+const uuid = require("uuid-random");
 const SubscribeCard = require("../../model/application/SubscribeCard");
 const SubscribeCardCoupon = require("../../model/application/SubscribeCardCoupon");
 const SubscribeUser = require("../../model/application/SubscribeUser");
+const { inventory: inventoryModel } = require("../../model/application/Inventory");
 const DailyRation = require("../../../bin/DailyRation");
 const mement = require("moment");
 const i18n = require("../../util/i18n");
@@ -18,6 +20,79 @@ exports.router = [
   text(/^[.#/](訂閱兌換|sub-coupon)\s(?<serial_number>[\w-]{36})$/, subscribeCouponExchange),
 ];
 
+exports.privateRouter = [text(/^[.#/](我要買月卡)\s(?<number>[135]{1})$/, buyMonthCard)];
+
+/**
+ * 用女神石購買月卡
+ * @param {import("bottender").LineContext} context
+ */
+async function buyMonthCard(context, props) {
+  const { userId } = context.event.source;
+  const number = parseInt(get(props, "match.groups.number", "1"), 10);
+  const { amount: ownMoney = 0 } = await inventoryModel.getUserMoney(userId);
+  let cost = 0;
+
+  switch (number) {
+    case 1:
+      cost = 50 * 10000;
+      break;
+    case 3:
+      cost = 135 * 10000;
+      break;
+    case 5:
+      cost = 220 * 10000;
+      break;
+    default:
+      throw new Error("Invalid number");
+  }
+
+  if (parseInt(ownMoney) < cost) {
+    await context.replyText(i18n.__("message.subscribe.not_enough_money"));
+    return;
+  }
+
+  const trx = await inventoryModel.transaction();
+  SubscribeCardCoupon.setTransaction(trx);
+
+  try {
+    const coupons = Array.from({ length: number }).map(() => ({
+      serial_number: uuid(),
+      subscribe_card_key: "month",
+      status: SubscribeCardCoupon.status.unused,
+      issued_by: "system",
+    }));
+    await SubscribeCardCoupon.insert(coupons);
+
+    await inventoryModel.decreaseGodStone({
+      userId,
+      amount: cost,
+      note: "buy_month_card",
+    });
+
+    context.replyText(i18n.__("message.subscribe.buy_month_card_success"));
+
+    const serialMessages = coupons.map(coupon =>
+      i18n.__("message.subscribe.give_serial_nubmer", {
+        serial_number: get(coupon, "serial_number"),
+      })
+    );
+
+    await context.replyText(serialMessages.join("\n"));
+
+    trx.commit();
+  } catch (e) {
+    trx.rollback();
+    console.error(e);
+    await context.replyText(
+      i18n.__("message.error_contact_admin", {
+        user_id: userId,
+        error_key: "buy_month_card",
+      })
+    );
+    return;
+  }
+}
+
 /**
  * 訂閱卡片資訊
  * @param {import("bottender").LineContext} context