Marketplace: Cart Total Updates as Products are Added and Removed (#927)

* Marketplace: Cart can Total Price Co-Authored-By: Ana Ulin <[email protected]> * Marketplace: Adding and Removing Products updates Cart's Total Co-authored-by: Ana Ulin <[email protected]> Co-authored-by: Ana Ulin <[email protected]>
zinc-collective · Nov 10, 2022 · e4cb538 · e4cb538
1 parent 2c44d95
commit e4cb538
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Showing 7 changed files with 76 additions and 30 deletions.
diff --git a/app/furniture/marketplace/cart.rb b/app/furniture/marketplace/cart.rb
@@ -6,11 +6,17 @@ class Cart < ApplicationRecord
 
     belongs_to :marketplace
     delegate :space, :room, to: :marketplace
-    has_many :cart_products
+    has_many :cart_products, dependent: :destroy
     has_many :products, through: :cart_products
 
     def self.model_name
       @_model_name ||= ActiveModel::Name.new(self, ::Marketplace)
     end
+
+    def price_total
+      cart_products.sum do |cart_product|
+        cart_product.product.price * cart_product.quantity
+      end
+    end
   end
 end
diff --git a/app/furniture/marketplace/cart_products_controller.rb b/app/furniture/marketplace/cart_products_controller.rb
@@ -19,7 +19,11 @@ def create
         end
 
         format.turbo_stream do
-          render turbo_stream: turbo_stream.replace("cart-product-#{cart_product.product_id}", cart_product)
+          render turbo_stream: [
+            turbo_stream.replace("cart-product-#{cart_product.product_id}", cart_product),
+            turbo_stream.replace("cart-footer-#{cart.id}",
+              partial: "marketplace/carts/footer", locals: {cart: cart}),
+            ]
         end
       end
     end
@@ -41,7 +45,11 @@ def update
           redirect_to [marketplace.space, marketplace.room]
         end
         format.turbo_stream do
-          render turbo_stream: turbo_stream.replace("cart-product-#{cart_product.product_id}", cart_product)
+          render turbo_stream: [
+            turbo_stream.replace("cart-product-#{cart_product.product_id}", cart_product),
+            turbo_stream.replace("cart-footer-#{cart.id}",
+              partial: "marketplace/carts/footer", locals: {cart: cart}),
+            ]
         end
       end
     end
@@ -63,7 +71,11 @@ def destroy
         end
 
         format.turbo_stream do
-          render turbo_stream: turbo_stream.replace("cart-product-#{cart_product.product_id}", cart.cart_products.new(product: cart_product.product))
+          render turbo_stream: [
+            turbo_stream.replace("cart-product-#{cart_product.product_id}", cart.cart_products.new(product: cart_product.product)),
+            turbo_stream.replace("cart-footer-#{cart.id}",
+              partial: "marketplace/carts/footer", locals: {cart: cart})
+          ]
         end
       end
     end

diff --git a/app/furniture/marketplace/carts/_cart.html.erb b/app/furniture/marketplace/carts/_cart.html.erb
@@ -0,0 +1,24 @@
+<div class="-mx-4 mt-8 overflow-hidden shadow ring-1 ring-black ring-opacity-5 sm:-mx-6 md:mx-0 md:rounded-lg">
+  <table class="min-w-full divide-y divide-gray-300 table-fixed">
+    <thead class="bg-gray-50">
+      <tr>
+        <th scope="col" class="py-3.5 pl-4 pr-3 text-left text-sm font-semibold text-gray-900 sm:pl-6">
+          <%= Marketplace::Product.human_attribute_name(:name) %>
+        </th>
+        <th scope="col" class="hidden px-3 py-3.5 text-left text-sm font-semibold text-gray-900 lg:table-cell">
+          <%= Marketplace::Product.human_attribute_name(:description) %>
+        </th>
+        <th scope="col" class="hidden px-3 py-3.5 text-left text-sm font-semibold text-gray-900 sm:table-cell">
+          <%= Marketplace::Product.human_attribute_name(:price) %>
+        </th>
+        <th  scope="col" class="w-48">&nbsp;</th>
+      </tr>
+    </thead>
+    <tbody class="divide-y divide-gray-200 bg-white">
+      <%- cart.marketplace.products.each do |product| %>
+        <%= render cart.cart_products.find_or_initialize_by(product: product) %>
+      <%- end %>
+    </tbody>
+    <%= render "marketplace/carts/footer", cart: cart %>
+  </table>
+</div>
diff --git a/app/furniture/marketplace/carts/_footer.html.erb b/app/furniture/marketplace/carts/_footer.html.erb
@@ -0,0 +1,9 @@
+<tfoot id="cart-footer-<%= cart.id%>" class="bg-gray-50">
+  <tr>
+    <td></td>
+    <th scope="row" class="text-right px-1 py-3.5">Total: </th>
+    <td class="text-left px-3 py-3.5 font-bold">
+      <%= humanized_money_with_symbol(cart.price_total) %>
+    </td>
+  </tr>
+</tfoot
diff --git a/app/furniture/marketplace/marketplaces/_marketplace.html.erb b/app/furniture/marketplace/marketplaces/_marketplace.html.erb
@@ -1,28 +1,8 @@
 
-<div class="-mx-4 mt-8 overflow-hidden shadow ring-1 ring-black ring-opacity-5 sm:-mx-6 md:mx-0 md:rounded-lg">
-  <table class="min-w-full divide-y divide-gray-300 table-fixed">
-    <thead class="bg-gray-50">
-      <tr>
-        <th scope="col" class="py-3.5 pl-4 pr-3 text-left text-sm font-semibold text-gray-900 sm:pl-6">
-          <%= Marketplace::Product.human_attribute_name(:name) %>
-        </th>
-        <th scope="col" class="hidden px-3 py-3.5 text-left text-sm font-semibold text-gray-900 lg:table-cell">
-          <%= Marketplace::Product.human_attribute_name(:description) %>
-        </th>
-        <th scope="col" class="hidden px-3 py-3.5 text-left text-sm font-semibold text-gray-900 sm:table-cell">
-          <%= Marketplace::Product.human_attribute_name(:price) %>
-        </th>
-        <th  scope="col" class="w-48">&nbsp;</th>
-      </tr>
-    </thead>
-    <tbody class="divide-y divide-gray-200 bg-white">
-      <%- cart = marketplace.carts.find_or_create_by(id: session[:current_cart] ||= SecureRandom.uuid) %>
-      <%- marketplace.products.each do |product| %>
-        <%= render cart.cart_products.find_or_initialize_by(product: product) %>
-      <%- end %>
-    </tbody>
-  </table>
-</div>
+<%- cart = marketplace.carts.find_or_create_by(id: session[:current_cart] ||= SecureRandom.uuid) %>
+
+<%= render cart %>
+
 <div class="m-2 text-center">
 <%- if policy(marketplace.products.new).create? %>
   <%= link_to t('.manage_products'), marketplace.location(:products) %>

diff --git a/config/initializers/money.rb b/config/initializers/money.rb
@@ -70,7 +70,7 @@
   #
   # set to BigDecimal::ROUND_HALF_EVEN by default
   #
-  # config.rounding_mode = BigDecimal::ROUND_HALF_UP
+  config.rounding_mode = BigDecimal::ROUND_HALF_EVEN
 
   # Set default money format globally.
   # Default value is nil meaning "ignore this option".

diff --git a/spec/furniture/marketplace/cart_spec.rb b/spec/furniture/marketplace/cart_spec.rb
@@ -1,9 +1,24 @@
 require "rails_helper"
 
 RSpec.describe Marketplace::Cart, type: :model do
-  it { is_expected.to have_many(:cart_products) }
+  it { is_expected.to have_many(:cart_products).dependent(:destroy) }
 
   it { is_expected.to have_many(:products).through(:cart_products) }
 
   it { is_expected.to belong_to(:marketplace).class_name("Marketplace::Marketplace") }
+
+  describe "#price_total" do
+    subject(:price_total) { cart.price_total }
+
+    let(:cart) { create(:marketplace_cart) }
+    let(:product_a) { create(:marketplace_product, marketplace: cart.marketplace) }
+    let(:product_b) { create(:marketplace_product, marketplace: cart.marketplace) }
+
+    before do
+      cart.cart_products.create!(product: product_a, quantity: 1)
+      cart.cart_products.create!(product: product_b, quantity: 2)
+    end
+
+    it { is_expected.to eql(product_a.price + product_b.price + product_b.price) }
+  end
 end