generate receipt after sale

Author: roonglit

Gemfile

@@ -48,6 +48,7 @@ gem "aws-sdk-s3", require: false
 gem "pdftoimage"
 gem "money-rails"
 gem "prawn"
+gem "prawn-table"
 gem "omise"
 gem "pagy"
 gem "openssl"
@@ -68,13 +69,16 @@ group :development, :test do
   gem "rspec-rails"
   gem "factory_bot_rails"
   gem "launchy"
-  gem "rack-mini-profiler", require: false
+  gem "rack-mini-profiler"
   gem "sinatra", require: false
 end
 
 group :development do
   # Use console on exceptions pages [https://github.com/rails/web-console]
   gem "web-console"
+
+  # Preview emails in the browser instead of sending them
+  gem "letter_opener"
 end
 
 group :test do

Gemfile.lock

@@ -224,6 +224,8 @@ GEM
       addressable (~> 2.8)
       childprocess (~> 5.0)
       logger (~> 1.6)
+    letter_opener (1.10.0)
+      launchy (>= 2.2, < 4)
     lint_roller (1.1.0)
     logger (1.7.0)
     loofah (2.24.1)
@@ -314,6 +316,8 @@ GEM
       matrix (~> 0.4)
       pdf-core (~> 0.10.0)
       ttfunk (~> 1.8)
+    prawn-table (0.2.2)
+      prawn (>= 1.3.0, < 3.0.0)
     prettyprint (0.2.0)
     prism (1.6.0)
     propshaft (1.3.1)
@@ -397,7 +401,7 @@ GEM
     rspec-expectations (3.13.5)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.13.0)
-    rspec-mocks (3.13.6)
+    rspec-mocks (3.13.7)
       diff-lcs (>= 1.2.0, < 2.0)
       rspec-support (~> 3.13.0)
     rspec-rails (8.0.2)
@@ -578,13 +582,15 @@ DEPENDENCIES
   jbuilder
   kamal
   launchy
+  letter_opener
   money-rails
   omise
   openssl
   pagy
   pdftoimage
   pg (~> 1.1)
   prawn
+  prawn-table
   propshaft
   puma (>= 5.0)
   pundit (~> 2.5)

app/assets/fonts/tax_invoice/bold.ttf

@@ -1,5 +1,5 @@
 class OrdersController < ApplicationController
-  before_action :set_order, only: %i[ verify complete ]
+  before_action :set_order, only: %i[ verify complete receipt ]
 
   # POST /orders or /orders.json
   def create
@@ -53,9 +53,18 @@ def verify
 
     if charge.paid
       @order.paid!
+      @order.update!(paid_at: Time.current)
 
       # Create subscription for the user
       if CreateSubscriptionForOrder.new(@order).perform
+        # Generate receipt number and send email
+        @order.generate_receipt_number
+        @order.save!
+
+        # Send receipt email with PDF attachment
+        OrderMailer.receipt_email(@order).deliver_later
+        @order.update!(receipt_sent_at: Time.current)
+
         # Clear the user's cart after successful order
         ClearCurrentUserCart.new(@order.member).perform
         redirect_to complete_order_path(@order)
@@ -79,6 +88,27 @@ def verify
   def complete
   end
 
+  def receipt
+    # Check if order belongs to current user
+    unless @order.member == current_user
+      redirect_to root_path, alert: "Unauthorized access" and return
+    end
+
+    # Check if receipt number exists (order is paid)
+    unless @order.receipt_number.present?
+      redirect_to root_path, alert: "Receipt not available" and return
+    end
+
+    # Generate PDF
+    pdf = Receipts::SimplifiedReceiptPdf.new(@order)
+
+    # Send PDF as download
+    send_data pdf.render,
+              filename: "receipt-#{@order.receipt_number}.pdf",
+              type: "application/pdf",
+              disposition: "attachment"
+  end
+
   private
     def set_order
       @order = Order.find(params[:id])

app/assets/fonts/tax_invoice/bold_italic.ttf

@@ -1,4 +1,4 @@
 class ApplicationMailer < ActionMailer::Base
-  default from: "from@example.com"
+  default from: -> { Company.first&.email || "noreply@dailynews.com" }
   layout "mailer"
 end

app/assets/fonts/tax_invoice/regular.ttf

@@ -0,0 +1,21 @@
+class OrderMailer < ApplicationMailer
+  default from: Rails.application.credentials.dig(:smtp, :from)
+
+  def receipt_email(order)
+    @order = order
+    @subscription = order.subscription
+    @product = order.product
+    @user = order.member
+
+    # Generate PDF receipt
+    pdf = Receipts::SimplifiedReceiptPdf.new(order)
+
+    # Attach PDF to email
+    attachments["receipt-#{order.receipt_number}.pdf"] = pdf.render
+
+    mail(
+      to: @user.email,
+      subject: "ใบเสร็จรับเงิน - #{@product.title}"
+    )
+  end
+end

app/assets/fonts/tax_invoice/regular_italic.ttf

@@ -33,4 +33,26 @@ def tax_amount
   def tax_rate_percentage
     (TAX_RATE * 100).to_i
   end
+
+  # Generate receipt number in format: DNT-YYYYMMDD-XXXXX
+  def generate_receipt_number
+    return if receipt_number.present?
+
+    date_prefix = Time.current.strftime("%Y%m%d")
+
+    # Get the last receipt number for today
+    last_receipt = Order.where("receipt_number LIKE ?", "DNT-#{date_prefix}-%")
+                        .order(receipt_number: :desc)
+                        .first
+
+    if last_receipt && last_receipt.receipt_number.present?
+      # Extract sequence number and increment
+      sequence = last_receipt.receipt_number.split("-").last.to_i + 1
+    else
+      # Start with 1 for the first receipt of the day
+      sequence = 1
+    end
+
+    self.receipt_number = "DNT-#{date_prefix}-#{sequence.to_s.rjust(5, '0')}"
+  end
 end