func readProductFiles()

in src/product-catalog/main.go [217:256]

• 30 lines of code
• 8 McCabe index (conditional complexity)

func readProductFiles() ([]*pb.Product, error) {

	// find all .json files in the products directory
	entries, err := os.ReadDir("./products")
	if err != nil {
		return nil, err
	}

	jsonFiles := make([]fs.FileInfo, 0, len(entries))
	for _, entry := range entries {
		if strings.HasSuffix(entry.Name(), ".json") {
			info, err := entry.Info()
			if err != nil {
				return nil, err
			}
			jsonFiles = append(jsonFiles, info)
		}
	}

	// read the contents of each .json file and unmarshal into a ListProductsResponse
	// then append the products to the catalog
	var products []*pb.Product
	for _, f := range jsonFiles {
		jsonData, err := os.ReadFile("./products/" + f.Name())
		if err != nil {
			return nil, err
		}

		var res pb.ListProductsResponse
		if err := protojson.Unmarshal(jsonData, &res); err != nil {
			return nil, err
		}

		products = append(products, res.Products...)
	}

	log.Infof("Loaded %d products", len(products))

	return products, nil
}