dc7effd601
The ad service now returns ads matching the categories of the product that is currently displayed. Changes in this commit: - List all products' categories in products.json. - Pass the current product's categories from the frontend to the ad service when looking up ads. - Store a statically initialized multimap from product category to ad in the ad service. - Return all ads matching the given categories when handling an ads request. The ad service continues to return random ads when no categories are given or no ads match the categories.
127 lines
4.1 KiB
Go
127 lines
4.1 KiB
Go
// Copyright 2018 Google LLC
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"context"
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"time"
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pb "github.com/GoogleCloudPlatform/microservices-demo/src/frontend/genproto"
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"github.com/pkg/errors"
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)
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const (
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avoidNoopCurrencyConversionRPC = false
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)
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func (fe *frontendServer) getCurrencies(ctx context.Context) ([]string, error) {
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currs, err := pb.NewCurrencyServiceClient(fe.currencySvcConn).
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GetSupportedCurrencies(ctx, &pb.Empty{})
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if err != nil {
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return nil, err
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}
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var out []string
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for _, c := range currs.CurrencyCodes {
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if _, ok := whitelistedCurrencies[c]; ok {
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out = append(out, c)
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}
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}
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return out, nil
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}
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func (fe *frontendServer) getProducts(ctx context.Context) ([]*pb.Product, error) {
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resp, err := pb.NewProductCatalogServiceClient(fe.productCatalogSvcConn).
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ListProducts(ctx, &pb.Empty{})
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return resp.GetProducts(), err
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}
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func (fe *frontendServer) getProduct(ctx context.Context, id string) (*pb.Product, error) {
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resp, err := pb.NewProductCatalogServiceClient(fe.productCatalogSvcConn).
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GetProduct(ctx, &pb.GetProductRequest{Id: id})
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return resp, err
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}
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func (fe *frontendServer) getCart(ctx context.Context, userID string) ([]*pb.CartItem, error) {
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resp, err := pb.NewCartServiceClient(fe.cartSvcConn).GetCart(ctx, &pb.GetCartRequest{UserId: userID})
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return resp.GetItems(), err
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}
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func (fe *frontendServer) emptyCart(ctx context.Context, userID string) error {
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_, err := pb.NewCartServiceClient(fe.cartSvcConn).EmptyCart(ctx, &pb.EmptyCartRequest{UserId: userID})
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return err
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}
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func (fe *frontendServer) insertCart(ctx context.Context, userID, productID string, quantity int32) error {
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_, err := pb.NewCartServiceClient(fe.cartSvcConn).AddItem(ctx, &pb.AddItemRequest{
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UserId: userID,
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Item: &pb.CartItem{
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ProductId: productID,
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Quantity: quantity},
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})
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return err
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}
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func (fe *frontendServer) convertCurrency(ctx context.Context, money *pb.Money, currency string) (*pb.Money, error) {
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if avoidNoopCurrencyConversionRPC && money.GetCurrencyCode() == currency {
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return money, nil
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}
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return pb.NewCurrencyServiceClient(fe.currencySvcConn).
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Convert(ctx, &pb.CurrencyConversionRequest{
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From: money,
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ToCode: currency})
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}
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func (fe *frontendServer) getShippingQuote(ctx context.Context, items []*pb.CartItem, currency string) (*pb.Money, error) {
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quote, err := pb.NewShippingServiceClient(fe.shippingSvcConn).GetQuote(ctx,
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&pb.GetQuoteRequest{
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Address: nil,
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Items: items})
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if err != nil {
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return nil, err
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}
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localized, err := fe.convertCurrency(ctx, quote.GetCostUsd(), currency)
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return localized, errors.Wrap(err, "failed to convert currency for shipping cost")
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}
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func (fe *frontendServer) getRecommendations(ctx context.Context, userID string, productIDs []string) ([]*pb.Product, error) {
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resp, err := pb.NewRecommendationServiceClient(fe.recommendationSvcConn).ListRecommendations(ctx,
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&pb.ListRecommendationsRequest{UserId: userID, ProductIds: productIDs})
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if err != nil {
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return nil, err
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}
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out := make([]*pb.Product, len(resp.GetProductIds()))
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for i, v := range resp.GetProductIds() {
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p, err := fe.getProduct(ctx, v)
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if err != nil {
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return nil, errors.Wrapf(err, "failed to get recommended product info (#%s)", v)
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}
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out[i] = p
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}
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if len(out) > 4 {
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out = out[:4] // take only first four to fit the UI
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}
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return out, err
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}
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func (fe *frontendServer) getAd(ctx context.Context, ctxKeys []string) ([]*pb.Ad, error) {
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ctx, cancel := context.WithTimeout(ctx, time.Millisecond*100)
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defer cancel()
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resp, err := pb.NewAdServiceClient(fe.adSvcConn).GetAds(ctx, &pb.AdRequest{
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ContextKeys: ctxKeys,
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})
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return resp.GetAds(), errors.Wrap(err, "failed to get ads")
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}
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