morihirok

app/controllers/dashboard/orders_controller.rb

@@ -1,4 +1,6 @@
 class Dashboard::OrdersController < ApplicationController
+  before_action :set_items_and_users, only: [ :new, :create ]
+
   def index
     @orders = Order.includes(:item, :reservation, :user).order(created_at: :desc)
   end
@@ -16,6 +18,38 @@ def new
   end
 
   def create
-    # Write Code Here
+    reservation = Reservation.find(order_params[:reservation_id])
+    item = Item.find(order_params[:item_id])
+    user = User.find(order_params[:user_id])
+
+    @order = reservation.build_order(
+      email: reservation.email,
+      name: item.name,
+      user: user,
+      item: item,
+    )
+
+    if item.stock < 1
+      flash.now.alert = "在庫が不足しています"
+      return render :new
+    end
+
+    if @order.execute_payment_and_update_reservation_and_item(token: order_params[:token])
+      redirect_to dashboard_orders_path, notice: "注文が作成されました"
+    else
+      flash.now.alert = "決済に失敗しました。"
+      render :new
+    end
+  end
+
+  private
+
+  def order_params
+    params.require(:order).permit(:reservation_id, :item_id, :user_id, :token)
+  end
+
+  def set_items_and_users
+    @items = Item.all.order(:name)
+    @users = User.all.order(:name)
   end
 end

app/models/order.rb

@@ -6,4 +6,24 @@ class Order < ApplicationRecord
 
   validates :email, presence: true
   validates :name, presence: true
+
+  def execute_payment_and_update_reservation_and_item(token:)
+    response = PaymentApiClient.execute(token:, amount: item.price)
+
+    ActiveRecord::Base.transaction do
+      build_payment(payment_id: response[:payment_id], amount: response[:amount])
+      if reservation.status == "completed"
+        raise ActiveRecord::RecordInvalid, "Reservation is already completed"
+      end
+      reservation.update!(status: :completed)
+      item.update!(stock: item.stock - 1)
+      save!
+    end
+
+    true
+  rescue Timeout::Error, ArgumentError
+    false
+  rescue ActiveRecord::RecordInvalid, ActiveRecord::RecordNotSaved
+    false
+  end
 end