kurtosis-tech · lostbean · Aug 14, 2024
diff --git a/release/obd-kardinal.yaml b/release/obd-kardinal.yaml
@@ -104,7 +104,7 @@ spec:
     spec:
       containers:
         - name: server
-          image: kurtosistech/frontend:main
+          image: kurtosistech/frontend:demo-on-sale
           imagePullPolicy: IfNotPresent
           ports:
             - containerPort: 8080
@@ -286,7 +286,7 @@ spec:
       terminationGracePeriodSeconds: 5
       containers:
         - name: server
-          image: kurtosistech/productcatalogservice:main
+          image: kurtosistech/productcatalogservice:demo-on-sale
           imagePullPolicy: IfNotPresent
           ports:
             - containerPort: 8070

diff --git a/src/frontend/handlers.go b/src/frontend/handlers.go
@@ -78,8 +78,10 @@ func (fe *frontendServer) homeHandler(w http.ResponseWriter, r *http.Request) {
 	cart := cartResponse.JSON200
 
 	type productView struct {
-		Item  productcatalogservice_rest_types.Product
-		Price *productcatalogservice_rest_types.Money
+		Item       productcatalogservice_rest_types.Product
+		Price      *productcatalogservice_rest_types.Money
+		Discount   *productcatalogservice_rest_types.Money
+		FinalPrice *productcatalogservice_rest_types.Money
 	}
 
 	products := *productsList
@@ -91,7 +93,14 @@ func (fe *frontendServer) homeHandler(w http.ResponseWriter, r *http.Request) {
 			renderHTTPError(r, w, errors.Wrapf(err, "could not convert currency for product #%s", *p.Id), http.StatusInternalServerError)
 			return
 		}
-		newPV := productView{p, price}
+
+		if p.Discount == nil {
+			renderHTTPError(r, w, errors.Errorf("could not calculate discount for product #%s", *p.Id), http.StatusInternalServerError)
+			return
+		}
+		discount := money.Must(money.MultiplyFloat(price, float64(*p.Discount)))
+		finalPrice := money.Must(money.Sum(price, money.Negate(discount)))
+		newPV := productView{p, price, discount, finalPrice}
 		ps[i] = newPV
 	}
 
@@ -150,10 +159,19 @@ func (fe *frontendServer) productHandler(w http.ResponseWriter, r *http.Request)
 		return
 	}
 
+	if p.Discount == nil {
+		renderHTTPError(r, w, errors.Errorf("Could not calculate discount for product #%s", *p.Id), http.StatusInternalServerError)
+		return
+	}
+	discount := money.Must(money.MultiplyFloat(price, float64(*p.Discount)))
+	finalPrice := money.Must(money.Sum(price, money.Negate(discount)))
+
 	product := struct {
-		Item  productcatalogservice_rest_types.Product
-		Price *productcatalogservice_rest_types.Money
-	}{*p, price}
+		Item       productcatalogservice_rest_types.Product
+		Price      *productcatalogservice_rest_types.Money
+		Discount   *productcatalogservice_rest_types.Money
+		FinalPrice *productcatalogservice_rest_types.Money
+	}{*p, price, discount, finalPrice}
 
 	if err := templates.ExecuteTemplate(w, "product", map[string]interface{}{
 		"session_id": sessionID(r),
@@ -247,7 +265,10 @@ func (fe *frontendServer) viewCartHandler(w http.ResponseWriter, r *http.Request
 		Quantity   int32
 		IsAPresent bool
 		Price      *productcatalogservice_rest_types.Money
+		FinalPrice *productcatalogservice_rest_types.Money
+		Discount   *productcatalogservice_rest_types.Money
 	}
+
 	items := make([]cartItemView, len(*cart.Items))
 	currentCurrencyObj := currentCurrency(r)
 	zeroNanos := int32(0)
@@ -257,6 +278,11 @@ func (fe *frontendServer) viewCartHandler(w http.ResponseWriter, r *http.Request
 		Nanos:        &zeroNanos,
 		Units:        &zeroUnits,
 	}
+	totalDiscount := &productcatalogservice_rest_types.Money{
+		CurrencyCode: &currentCurrencyObj,
+		Nanos:        &zeroNanos,
+		Units:        &zeroUnits,
+	}
 
 	cartItems := *cart.Items
 
@@ -272,21 +298,41 @@ func (fe *frontendServer) viewCartHandler(w http.ResponseWriter, r *http.Request
 			renderHTTPError(r, w, errors.Wrapf(err, "could not convert currency for product #%s", *item.ProductId), http.StatusInternalServerError)
 			return
 		}
-
 		logrus.Debugf("Price is %+v", price)
 
 		multPrice := money.MultiplySlow(price, uint32(*item.Quantity))
 
+		if p.Discount == nil {
+			renderHTTPError(r, w, errors.Errorf("Could not calculate discount for product #%s", *item.ProductId), http.StatusInternalServerError)
+			return
+		}
+
+		multDiscount, err := money.MultiplyFloat(price, float64(*p.Discount))
+		if err != nil {
+			renderHTTPError(r, w, errors.Wrapf(err, "could not calculate discount for product #%s", *item.ProductId), http.StatusInternalServerError)
+			return
+		}
+		finalPrice := money.Must(money.Sum(multPrice, money.Negate(multDiscount)))
+
 		prod := *p
 		quan := *item.Quantity
 
 		items[i] = cartItemView{
-			Item:     prod,
-			Quantity: quan,
-			Price:    multPrice,
+			Item:       prod,
+			Quantity:   quan,
+			Price:      multPrice,
+			FinalPrice: finalPrice,
+			Discount:   multDiscount,
 		}
 
 		totalPrice = money.Must(money.Sum(totalPrice, multPrice))
+		totalDiscount = money.Must(money.Sum(totalDiscount, multDiscount))
+	}
+
+	totalCost, err := money.Sum(totalPrice, money.Negate(totalDiscount))
+	if err != nil {
+		renderHTTPError(r, w, errors.Wrapf(err, "could not calculate discount for cart"), http.StatusInternalServerError)
+		return
 	}
 
 	year := time.Now().Year()
@@ -299,7 +345,9 @@ func (fe *frontendServer) viewCartHandler(w http.ResponseWriter, r *http.Request
 		"cart_size": cartSize(*cart.Items),
 		//"shipping_cost":     shippingCost,
 		"show_currency":    true,
-		"total_cost":       totalPrice,
+		"total_cost":       totalCost,
+		"total_value":      totalPrice,
+		"total_discount":   totalDiscount,
 		"items":            items,
 		"expiration_years": []int{year, year + 1, year + 2, year + 3, year + 4},
 		"platform_css":     plat.css,

diff --git a/src/frontend/money/money.go b/src/frontend/money/money.go
@@ -16,6 +16,7 @@ package money
 
 import (
 	"errors"
+
 	productcatalogservice_rest_types "github.com/kurtosis-tech/new-obd/src/productcatalogservice/api/http_rest/types"
 )
 
@@ -32,7 +33,6 @@ var (
 
 // IsValid checks if specified value has a valid units/nanos signs and ranges.
 func IsValid(m *productcatalogservice_rest_types.Money) bool {
-
 	nanos := *m.Nanos
 	return signMatches(m) && validNanos(nanos)
 }
@@ -84,7 +84,8 @@ func Negate(m *productcatalogservice_rest_types.Money) *productcatalogservice_re
 	return &productcatalogservice_rest_types.Money{
 		Units:        &negativeUnits,
 		Nanos:        &negativeNanos,
-		CurrencyCode: m.CurrencyCode}
+		CurrencyCode: m.CurrencyCode,
+	}
 }
 
 // Must panics if the given error is not nil. This can be used with other
@@ -126,7 +127,8 @@ func Sum(l, r *productcatalogservice_rest_types.Money) (*productcatalogservice_r
 	return &productcatalogservice_rest_types.Money{
 		Units:        &units,
 		Nanos:        &nanos,
-		CurrencyCode: l.CurrencyCode}, nil
+		CurrencyCode: l.CurrencyCode,
+	}, nil
 }
 
 // MultiplySlow is a slow multiplication operation done through adding the value
@@ -139,3 +141,32 @@ func MultiplySlow(m *productcatalogservice_rest_types.Money, n uint32) *productc
 	}
 	return out
 }
+
+// MultiplyFloat multiplies the Money value by a floating-point factor.
+// It returns an error if the value is invalid or the result is invalid.
+func MultiplyFloat(m *productcatalogservice_rest_types.Money, factor float64) (*productcatalogservice_rest_types.Money, error) {
+	if !IsValid(m) {
+		return &productcatalogservice_rest_types.Money{}, ErrInvalidValue
+	}
+
+	// Convert Money to total nanoseconds
+	totalNanos := int64(*m.Units)*nanosMod + int64(*m.Nanos)
+
+	// Perform the multiplication
+	resultNanos := int64(float64(totalNanos) * factor)
+
+	// Convert back to units and nanos
+	units := resultNanos / nanosMod
+	nanos := int32(resultNanos % nanosMod)
+
+	// Ensure nanos is within valid range
+	if nanos < nanosMin || nanos > nanosMax {
+		return &productcatalogservice_rest_types.Money{}, ErrInvalidValue
+	}
+
+	return &productcatalogservice_rest_types.Money{
+		Units:        &units,
+		Nanos:        &nanos,
+		CurrencyCode: m.CurrencyCode,
+	}, nil
+}
diff --git a/src/frontend/static/styles/cart.css b/src/frontend/static/styles/cart.css
@@ -56,6 +56,8 @@
 
 .cart-summary-item-row,
 .cart-summary-shipping-row,
+.cart-summary-total-value-row,
+.cart-summary-total-discount-row,
 .cart-summary-total-row {
     padding-bottom: 24px;
     padding-top: 24px;
@@ -90,6 +92,11 @@
     }
 }
 
+.cart-item-original-price {
+    font-size: 14px;
+    text-decoration: line-through;
+}
+
 /* Item cost (price). */
 .cart-summary-item-row .row:last-child strong {
     font-weight: 500;
@@ -99,6 +106,17 @@
     font-size: 28px;
 }
 
+.cart-summary-total-value-row {
+    font-size: 28px;
+    text-decoration: line-through;
+}
+
+.cart-summary-total-discount-row {
+    font-size: 28px;
+    color: red;
+}
+
+
 /* Cart Checkout Form */
 
 .cart-checkout-form h3 {
@@ -112,4 +130,4 @@
 /* "Place Order" button */
 .cart-checkout-form .cymbal-button-primary {
     margin-top: 36px;
-}
+}
diff --git a/src/frontend/static/styles/styles.css b/src/frontend/static/styles/styles.css
@@ -342,6 +342,11 @@ main {
   margin-bottom: 8px;
 }
 
+.hot-product-card-original-price {
+  font-size: 14px;
+  text-decoration: line-through;
+}
+
 .hot-product-card-price {
   font-size: 14px;
 }
@@ -419,6 +424,11 @@ similar to that of the hot-products-row.
   font-size: 28px;
 }
 
+.h-product .product-original-price {
+  font-size: 28px;
+  text-decoration: line-through;
+}
+
 .h-product .product-info .product-wrapper {
   margin-left: 15px;
 }

diff --git a/src/frontend/templates/cart.html b/src/frontend/templates/cart.html
@@ -81,8 +81,11 @@ <h4>{{ .Item.Name }}</h4>
                                 </div>
                                 {{end}}
                                 <div class="col pr-md-0 text-right">
-                                    <strong>
+                                    <div class="cart-item-original-price col pr-md-0 text-right">
                                         {{ renderMoney .Price }}
+                                    </div>
+                                    <strong>
+                                        {{ renderMoney .FinalPrice }}
                                     </strong>
                                 </div>
                             </div>
@@ -95,6 +98,16 @@ <h4>{{ .Item.Name }}</h4>
                         <div class="col pr-md-0 text-right">{{ renderMoney .shipping_cost }}</div>
                     </div>
 
+                    <div class="row cart-summary-total-value-row">
+                        <div class="col pl-md-0">Total Value</div>
+                        <div class="col pr-md-0 text-right">{{ renderMoney .total_value }}</div>
+                    </div>
+
+                    <div class="row cart-summary-total-discount-row">
+                        <div class="col pl-md-0">Total Discount</div>
+                        <div class="col pr-md-0 text-right">{{ renderMoney .total_discount }}</div>
+                    </div>
+
                     <div class="row cart-summary-total-row">
                         <div class="col pl-md-0">Total</div>
                         <div class="col pr-md-0 text-right">{{ renderMoney .total_cost }}</div>

diff --git a/src/frontend/templates/home.html b/src/frontend/templates/home.html
@@ -49,7 +49,8 @@ <h3>Hot Products</h3>
             </a>
             <div>
               <div class="hot-product-card-name">{{ .Item.Name }}</div>
-              <div class="hot-product-card-price">{{ renderMoney .Price }}</div>
+              <div class="hot-product-card-original-price">{{ renderMoney .Price }}</div>
+              <div class="hot-product-card-price">{{ renderMoney .FinalPrice }}</div>
             </div>
           </div>
           {{ end }}
@@ -75,4 +76,4 @@ <h3>Hot Products</h3>
   {{ template "footer" . }}
 </div>
 
-{{ end }}
+{{ end }}
diff --git a/src/frontend/templates/product.html b/src/frontend/templates/product.html
@@ -32,7 +32,8 @@
         <div class="product-wrapper">
 
           <h2>{{ $.product.Item.Name }}</h2>
-          <p class="product-price">{{ renderMoney $.product.Price }}</p>
+          <p class="product-original-price">{{ renderMoney $.product.Price }}</p>
+          <p class="product-price">{{ renderMoney $.product.FinalPrice }}</p>
           <p>{{ $.product.Item.Description }}</p>
 
           <form method="POST" action="/cart">
@@ -71,4 +72,4 @@ <h2>{{ $.product.Item.Name }}</h2>
   </div>
 </main>
 {{ template "footer" . }}
-{{ end }}
+{{ end }}
diff --git a/src/productcatalogservice/api/http_rest/server/server.gen.go b/src/productcatalogservice/api/http_rest/server/server.gen.go