refactor: organize backend by business responsibility

2026-09-13 13:52:57 +03:00
parent 7fde3ece6e
commit 8ba005346d
145 changed files with 3027 additions and 2346 deletions
@@ -0,0 +1,106 @@
+import { Injectable } from '@nestjs/common';
+import {
+  decimalFromString,
+  formatDecimal,
+  multiply,
+} from '../../../../../common/decimal';
+import { TbankClient } from '../../../../../integrations/tbank/tbank.api';
+import { decimal } from '../../../../../integrations/tbank/decimal';
+import { PortfolioService } from '../../../portfolio/portfolio.api';
+import {
+  moscowDay,
+  optional,
+  timestamp,
+} from '../../application/instrument-market';
+import { stockPosition } from './stock-position';
+import {
+  StockDividendDto,
+  StockDividendsDto,
+  StockPositionDto,
+} from '../presentation/stock.dto';
+
+import { StockCatalogService } from './stock-catalog.service';
+@Injectable()
+export class StockIncomeService {
+  constructor(
+    private readonly catalog: StockCatalogService,
+    private readonly tbank: TbankClient,
+    private readonly portfolios: PortfolioService,
+  ) {}
+  async position(userId: string, uid: string): Promise<StockPositionDto> {
+    return this.catalog.cached(userId, `position:${uid}`, async () =>
+      stockPosition(await this.portfolios.getAll(userId), uid),
+    );
+  }
+  dividends(userId: string, uid: string): Promise<StockDividendsDto> {
+    return this.catalog.cached(userId, `dividends:${uid}`, async (token) => {
+      await this.catalog.share(token, uid);
+      const today = moscowDay(new Date().toISOString());
+      const from = `${Number(today.slice(0, 4)) - 5}${today.slice(4)}`;
+      const to = `${Number(today.slice(0, 4)) + 1}${today.slice(4)}`;
+      const unavailable: string[] = [];
+      const [events, position] = await Promise.all([
+        this.tbank.getDividends(token, uid, from, to),
+        optional(() => this.position(userId, uid), 'position', unavailable),
+      ]);
+      const quantity =
+        position &&
+        position.accounts.length &&
+        position.accounts.every((p) => decimalFromString(p.quantity).value > 0n)
+          ? decimalFromString(position.quantity)
+          : null;
+      const dividends: StockDividendDto[] = events
+        .filter((event) => event.dividendType?.toLowerCase() !== 'cancelled')
+        .map((event) => {
+          const recordDate = timestamp(event.recordDate)?.slice(0, 10) ?? null;
+          const paymentDate =
+            timestamp(event.paymentDate)?.slice(0, 10) ?? null;
+          const lastBuyDate =
+            timestamp(event.lastBuyDate)?.slice(0, 10) ?? null;
+          const currency = event.dividendNet?.currency?.toUpperCase();
+          const perShare =
+            currency && event.dividendNet
+              ? { currency, value: formatDecimal(decimal(event.dividendNet)) }
+              : null;
+          // A future payment can have an already-fixed register: keep the event, but do not estimate entitlement from today's holding.
+          const eventDate = paymentDate ?? recordDate;
+          const timing: StockDividendDto['timing'] = eventDate
+            ? eventDate >= today
+              ? 'upcoming'
+              : 'past'
+            : 'undated';
+          const estimatedAmount =
+            quantity &&
+            perShare &&
+            recordDate &&
+            recordDate >= today &&
+            timing === 'upcoming'
+              ? {
+                  currency: perShare.currency,
+                  value: formatDecimal(
+                    multiply(quantity, decimalFromString(perShare.value)),
+                  ),
+                }
+              : null;
+          return {
+            perShare,
+            recordDate,
+            lastBuyDate,
+            paymentDate,
+            timing,
+            estimatedAmount,
+          };
+        })
+        .sort((a, b) => (b.recordDate ?? '').localeCompare(a.recordDate ?? ''));
+      return {
+        dividends,
+        from,
+        to,
+        observedAt: new Date().toISOString(),
+        positionAt: quantity ? (position?.observedAt ?? null) : null,
+        estimateUnavailable: unavailable.length > 0,
+        positionIsStale: position?.isStale ?? false,
+      };
+    });
+  }
+}