added state machine for invoice

app/controllers/eis_billing/invoices_controller.rb

@@ -9,8 +9,9 @@ module EisBilling
     before_action :load_invoice, only: :update
 
     def update
-      if @invoice.update(modified_params) && payment_orders_handler
-
+      # if @invoice.update(modified_params) && payment_orders_handler
+      state = InvoiceStateMachine.new(invoice: @invoice, status: params[:status])
+      if @invoice.update(modified_params) && state.call
         render json: {
           message: 'Invoice data was successfully updated',
         }, status: :ok
@@ -25,41 +26,41 @@ module EisBilling
 
     private
 
-    def payment_orders_handler
-      return false if @invoice.cancelled? && status.paid? || @invoice.cancelled? && status.issued?
-      return false if @invoice.paid? && (status.failed? || status.cancelled?)
+    # def payment_orders_handler
+    #   return false if @invoice.cancelled? && status.paid? || @invoice.cancelled? && status.issued?
+    #   return false if @invoice.paid? && (status.failed? || status.cancelled?)
 
-      case 
-      when @invoice.paid? && status.paid?
-        true
-      when @invoice.unpaid? && status.issued?
-        true
-      when @invoice.cancelled? && (status.cancelled? || status.failed?)
-        true
-      when status.issued?
-        @invoice.cancel_manualy
-      when status.paid?
-        @invoice.autobind_manually
-      else
-        @invoice.cancel
-      end
-    end
+    #   case 
+    #   when @invoice.paid? && status.paid?
+    #     true
+    #   when @invoice.unpaid? && status.issued?
+    #     true
+    #   when @invoice.cancelled? && (status.cancelled? || status.failed?)
+    #     true
+    #   when status.issued?
+    #     @invoice.cancel_manualy
+    #   when status.paid?
+    #     @invoice.autobind_manually
+    #   else
+    #     @invoice.cancel
+    #   end
+    # end
 
-    def status
-      status = case params[:status]
-               when 'paid'
-                 'paid'
-               when 'cancelled'
-                 'cancelled'
-               when 'failed'
-                 'failed'
-               else
-                 'unpaid'
-               end
+    # def status
+    #   status = case params[:status]
+    #            when 'paid'
+    #              'paid'
+    #            when 'cancelled'
+    #              'cancelled'
+    #            when 'failed'
+    #              'failed'
+    #            else
+    #              'unpaid'
+    #            end
 
-      Struct.new(:paid?, :cancelled?, :issued?, :failed?)
-            .new(status == PAID, status == CANCELLED, status == ISSUED, status == FAILED)
-    end
+    #   Struct.new(:paid?, :cancelled?, :issued?, :failed?)
+    #         .new(status == PAID, status == CANCELLED, status == ISSUED, status == FAILED)
+    # end
 
     def load_invoice
       @invoice = Invoice.find_by(number: params[:invoice][:invoice_number])

app/models/invoice_state_machine.rb

@@ -0,0 +1,44 @@
+# enum status: %i[unpaid paid cancelled failed]
+
+class InvoiceStateMachine
+  attr_reader :invoice, :status
+
+  def initialize(invoice:, status:)
+    @invoice = invoice
+    @status = status.to_sym
+  end
+
+  def call
+    case status
+    when :paid
+      mark_as_paid
+    when :cancelled
+      mark_as_cancel
+    when :unpaid
+      mark_as_unpaid
+    else
+      raise "Inavalid state #{invoice.status}"
+    end
+  end
+
+  private
+
+  def mark_as_paid
+    raise "Inavalid state #{invoice.status}" unless invoice.unpaid? || invoice.paid?
+
+    invoice.autobind_manually
+  end
+
+  def mark_as_cancel
+    # Paid invoice cannot be cancelled?
+    raise "Inavalid state #{invoice.status}" unless invoice.cancellable? || invoice.cancelled?
+
+    invoice.cancel
+  end
+
+  def mark_as_unpaid
+    raise "Inavalid state #{invoice.status}" unless invoice.paid? && invoice.payment_orders.present? || invoice.unpaid?
+
+    invoice.cancel_manualy
+  end
+end

app/models/payment_orders/every_pay.rb

@@ -30,6 +30,10 @@ module PaymentOrders
       valid_hmac? && valid_amount? && valid_account?
     end
 
+    def payment_reference?
+      response['payment_reference'].present?
+    end
+
     def settled_payment?
       SUCCESSFUL_PAYMENT.include?(response['payment_state'])
     end