update: add new field for subscription of user when purchased

src/modules/wallets/providers/wallets.service.ts

@@ -1,5 +1,6 @@
 import { BadRequestException, Injectable } from "@nestjs/common";
 // eslint-disable-next-line import/no-named-as-default
+import dayjs from "dayjs";
 import Decimal from "decimal.js";
 import { QueryRunner } from "typeorm";
 
@@ -115,6 +116,7 @@ export class WalletsService {
       .take(limit)
       .getManyAndCount();
 
+    // Current month totals
     const totals = await this.walletsTransactionRepo
       .createQueryBuilder("transaction")
       .leftJoin("transaction.wallet", "wallet")
@@ -125,14 +127,64 @@ export class WalletsService {
       ])
       .getRawOne();
 
+    const now = dayjs();
+    const firstDayOfMonth = now.startOf("month").toDate();
+    const firstDayOfPrevMonth = now.subtract(1, "month").startOf("month").toDate();
+    const lastDayOfPrevMonth = now.subtract(1, "month").endOf("month").toDate();
+
+    const prevMonthTotals = await this.walletsTransactionRepo
+      .createQueryBuilder("transaction")
+      .leftJoin("transaction.wallet", "wallet")
+      .where("wallet.userId = :userId", { userId })
+      .andWhere("transaction.createdAt >= :startDate", { startDate: firstDayOfPrevMonth })
+      .andWhere("transaction.createdAt <= :endDate", { endDate: lastDayOfPrevMonth })
+      .select([
+        `COALESCE(SUM(CASE WHEN transaction.type = '${TransactionType.DEPOSIT}' THEN transaction.amount ELSE 0 END), 0) AS "totalDeposits"`,
+        `COALESCE(SUM(CASE WHEN transaction.type = '${TransactionType.WITHDRAWAL}' THEN transaction.amount ELSE 0 END), 0) AS "totalWithdrawals"`,
+      ])
+      .getRawOne();
+
     const wallet = await this.walletsRepository.findOneBy({ user: { id: userId } });
+    if (!wallet) throw new BadRequestException(WalletMessage.WALLET_NOT_FOUND);
+
+    const prevMonthWallet = await this.walletsTransactionRepo
+      .createQueryBuilder("transaction")
+      .leftJoin("transaction.wallet", "wallet")
+      .where("wallet.userId = :userId", { userId })
+      .andWhere("transaction.createdAt < :date", { date: firstDayOfMonth })
+      .select([
+        `COALESCE(SUM(CASE WHEN transaction.type = '${TransactionType.DEPOSIT}' THEN transaction.amount ELSE 0 END), 0) -
+         COALESCE(SUM(CASE WHEN transaction.type = '${TransactionType.WITHDRAWAL}' THEN transaction.amount ELSE 0 END), 0) AS "prevBalance"`,
+      ])
+      .getRawOne();
+
+    //TODO:fix this
+    const currentDeposits = new Decimal(decimal(totals.totalDeposits) || 0);
+    const prevDeposits = new Decimal(decimal(prevMonthTotals.totalDeposits) || 0);
+    const depositsPercentChange = prevDeposits.isZero() ? null : currentDeposits.minus(prevDeposits).div(prevDeposits).mul(100);
+
+    const currentWithdrawals = new Decimal(decimal(totals.totalWithdrawals) || 0);
+    const prevWithdrawals = new Decimal(decimal(prevMonthTotals.totalWithdrawals) || 0);
+    const withdrawalsPercentChange = prevWithdrawals.isZero()
+      ? null
+      : currentWithdrawals.minus(prevWithdrawals).div(prevWithdrawals).mul(100);
+
+    const currentBalance = wallet.balance;
+    const prevBalance = decimal(prevMonthWallet.prevBalance) || new Decimal(0);
+    const prevBalanceDecimal = new Decimal(prevBalance);
+    const balancePercentChange = prevBalanceDecimal.isZero()
+      ? null
+      : currentBalance.minus(prevBalanceDecimal).div(prevBalanceDecimal).mul(100).toNumber();
 
     return {
-      balance: wallet?.balance,
+      balance: currentBalance,
+      balancePercentChange,
       transactions,
       count,
-      totalDeposits: decimal(totals.totalDeposits) || 0,
-      totalWithdrawals: decimal(totals.totalWithdrawals) || 0,
+      totalDeposits: currentDeposits.toNumber(),
+      totalDepositsPercentChange: depositsPercentChange,
+      totalWithdrawals: currentWithdrawals.toNumber(),
+      totalWithdrawalsPercentChange: withdrawalsPercentChange,
       paginate: true,
     };
   }