refactor: move bank card queries into repository (WealthLedger/backend#171)

src/modules/banking/bank-cards/application/bank-cards.service.ts

@@ -1,7 +1,6 @@
 import { Injectable } from '@nestjs/common';
 
 import { BankCard, Prisma } from '../../../../../generated/prisma/client';
-import { PrismaService } from '../../../../prisma/prisma.service';
 import { bankBalance } from '../domain/bank-card.calculations';
 import { rubMoney } from '../domain/rub-money';
 import { BankCardsRepository } from '../infrastructure/bank-cards.repository';
@@ -20,15 +19,10 @@ import {
   missing,
 } from './bank-card-input';
 
-const EXPECTED_UPDATED_CARDS = 1;
-
 type Tx = Prisma.TransactionClient;
 @Injectable()
 export class BankCardsService {
-  constructor(
-    private readonly prisma: PrismaService,
-    private readonly repository: BankCardsRepository,
-  ) {}
+  constructor(private readonly repository: BankCardsRepository) {}
 
   private async cardView(tx: Tx, card: BankCard): Promise<BankCardDto> {
     const rows = await this.repository.cardOperations(tx, card);
@@ -64,7 +58,7 @@ export class BankCardsService {
     const input = cardInput(dto),
       hash = fingerprint(input);
     return this.repository.write(async (tx) => {
-      const existing = await tx.bankCard.findUnique({ where: { id: dto.id } });
+      const existing = await this.repository.cardById(tx, dto.id);
       if (existing) {
         if (existing.userId !== userId) missing();
         // eslint-disable-next-line security/detect-possible-timing-attacks -- This compares an idempotency fingerprint after ownership validation, not a secret.
@@ -77,8 +71,11 @@ export class BankCardsService {
       await this.repository.seed(tx, userId);
       return this.cardView(
         tx,
-        await tx.bankCard.create({
-          data: { ...input, id: dto.id, userId, createFingerprint: hash },
+        await this.repository.createCard(tx, {
+          ...input,
+          id: dto.id,
+          userId,
+          createFingerprint: hash,
         }),
       );
     });
@@ -111,20 +108,16 @@ export class BankCardsService {
       }
       currentDate(input.openingDate);
       if (
-        await tx.bankCardOperation.findFirst({
-          where: {
-            userId,
-            deletedAt: null,
-            date: { lt: input.openingDate },
-            OR: [{ cardId: id }, { targetCardId: id }],
-          },
-        })
+        await this.repository.hasOperationsBefore(tx, userId, id, input.openingDate)
       ) {
         fail(BankErrorCode.OpeningDateConflict);
       }
-      const changed = await tx.bankCard.updateMany({
-        where: { id, userId, version: dto.version },
-        data: {
+      const updated = await this.repository.updateCard(
+        tx,
+        userId,
+        id,
+        dto.version,
+        {
           ...input,
           paymentSystem: input.paymentSystem ?? null,
           version: { increment: 1 },
@@ -136,9 +129,8 @@ export class BankCardsService {
                   : null,
               }),
         },
-      });
-      if (changed.count !== EXPECTED_UPDATED_CARDS) conflict();
-      return this.cardView(tx, await this.repository.card(tx, userId, id));
+      );
+      return this.cardView(tx, updated);
     });
   }
 }

src/modules/banking/bank-cards/infrastructure/bank-cards.repository.ts

@@ -13,6 +13,7 @@ import { BankOperationKind } from '../domain/bank-operation-kind';
 
 const INITIAL_RETRY_COUNT = 0;
 const LAST_SEED_OFFSET = 1;
+const EXPECTED_UPDATED_CARDS = 1;
 const EXPECTED_UPDATED_CATEGORIES = 1;
 const VERSION_INCREMENT = 1;
 
@@ -56,6 +57,40 @@ export class BankCardsRepository {
     });
   }
 
+  cardById(tx: Tx, id: string) {
+    return tx.bankCard.findUnique({ where: { id } });
+  }
+
+  createCard(tx: Tx, data: Prisma.BankCardUncheckedCreateInput) {
+    return tx.bankCard.create({ data });
+  }
+
+  async updateCard(
+    tx: Tx,
+    userId: string,
+    id: string,
+    version: number,
+    data: Prisma.BankCardUpdateManyMutationInput,
+  ) {
+    const changed = await tx.bankCard.updateMany({
+      where: { id, userId, version },
+      data,
+    });
+    if (changed.count !== EXPECTED_UPDATED_CARDS) conflict();
+    return this.card(tx, userId, id);
+  }
+
+  hasOperationsBefore(tx: Tx, userId: string, id: string, openingDate: string) {
+    return tx.bankCardOperation.findFirst({
+      where: {
+        userId,
+        deletedAt: null,
+        date: { lt: openingDate },
+        OR: [{ cardId: id }, { targetCardId: id }],
+      },
+    });
+  }
+
   async categories(userId: string) {
     return (
       await this.prisma.expenseCategory.findMany({