feat: интерактивный установщик install.sh (Docker / Ubuntu, админ, БД)

Co-authored-by: Cursor <cursoragent@cursor.com>

src/routes/promo.js

@@ -0,0 +1,86 @@
+const express = require('express');
+const { formatPrice } = require('../db');
+const { getCart, cartCount, cartItems } = require('../cart');
+const { requireCookieConsent } = require('../middleware/cookieConsent');
+const { asyncHandler } = require('../utils/asyncHandler');
+const promoService = require('../services/promo');
+const loyaltyService = require('../services/loyalty');
+const { buildCartPricing } = require('../services/pricing');
+
+const router = express.Router();
+
+router.use(requireCookieConsent);
+router.use((req, res, next) => {
+  res.locals.cartCount = cartCount(getCart(req));
+  res.locals.formatPrice = formatPrice;
+  next();
+});
+
+function cartRedirect(msg, type = 'error') {
+  const param = type === 'success' ? 'promo_ok' : 'promo_error';
+  return `/cart?${param}=${encodeURIComponent(msg)}`;
+}
+
+router.post(
+  '/cart/promo',
+  asyncHandler(async (req, res) => {
+    const cart = getCart(req);
+    const items = await cartItems(cart);
+    if (!items.length) {
+      return res.redirect(cartRedirect('Корзина пуста'));
+    }
+
+    const subtotal = items.reduce((s, i) => s + i.line_total, 0);
+    const promo = await promoService.findPromoByCode(req.body.code);
+    const check = promoService.validatePromo(promo, subtotal);
+    if (!check.ok) {
+      delete req.session.appliedPromoCode;
+      return res.redirect(cartRedirect(check.error));
+    }
+
+    req.session.appliedPromoCode = promo.code;
+    res.redirect(cartRedirect(`Промокод ${promo.code} применён`, 'success'));
+  })
+);
+
+router.post('/cart/promo/remove', (req, res) => {
+  delete req.session.appliedPromoCode;
+  res.redirect(cartRedirect('Промокод удалён', 'success'));
+});
+
+router.post(
+  '/cart/loyalty',
+  asyncHandler(async (req, res) => {
+    if (!req.session.userId) {
+      return res.redirect('/login?next=/cart');
+    }
+
+    const cart = getCart(req);
+    const items = await cartItems(cart);
+    if (!items.length) {
+      return res.redirect(cartRedirect('Корзина пуста'));
+    }
+
+    const pricing = await buildCartPricing(items, req.session, req.session.userId);
+    const maxPoints = loyaltyService.pointsForDiscount(
+      Math.max(0, pricing.subtotal - pricing.promoDiscount)
+    );
+    const balance = pricing.loyaltyBalance;
+
+    if (req.body.use_all === '1') {
+      req.session.loyaltyPointsToUse = Math.min(balance, maxPoints);
+    } else {
+      const pts = Math.max(0, parseInt(req.body.points, 10) || 0);
+      req.session.loyaltyPointsToUse = Math.min(pts, balance, maxPoints);
+    }
+
+    res.redirect(cartRedirect('Баллы лояльности применены', 'success'));
+  })
+);
+
+router.post('/cart/loyalty/remove', (req, res) => {
+  delete req.session.loyaltyPointsToUse;
+  res.redirect(cartRedirect('Списание баллов отменено', 'success'));
+});
+
+module.exports = router;