implemented method which get invoice number from billins side and updated tests

app/controllers/registrar/deposits_controller.rb

@@ -25,6 +25,7 @@ class Registrar
     def send_invoice_data_to_billing_system
       add_invoice_instance = EisBilling::AddDeposits.new(@invoice)
       result = add_invoice_instance.send_invoice
+
       link = JSON.parse(result.body)['everypay_link']
 
       @invoice.update(payment_link: link)

app/models/invoice.rb

@@ -41,19 +41,28 @@ class Invoice < ApplicationRecord
   attribute :vat_rate, ::Type::VatRate.new
 
   def set_invoice_number
-    last_no = Invoice.order(number: :desc).limit(1).pick(:number)
+    # last_no = Invoice.order(number: :desc).limit(1).pick(:number)
 
-    if last_no && last_no >= Setting.invoice_number_min.to_i
-      self.number = last_no + 1
-    else
-      self.number = Setting.invoice_number_min.to_i
+    # if last_no && last_no >= Setting.invoice_number_min.to_i
+    #   self.number = last_no + 1
+    # else
+    #   self.number = Setting.invoice_number_min.to_i
+    # end
+
+    # return if number <= Setting.invoice_number_max.to_i
+
+    # errors.add(:base, I18n.t('failed_to_generate_invoice_invoice_number_limit_reached'))
+    # logger.error('INVOICE NUMBER LIMIT REACHED, COULD NOT GENERATE INVOICE')
+    # throw(:abort)
+    result = EisBilling::GetInvoiceNumber.send_invoice
+
+    if JSON.parse(result.body)['error'] == 'out of range'
+      errors.add(:base, I18n.t('failed_to_generate_invoice_invoice_number_limit_reached'))
+      logger.error('INVOICE NUMBER LIMIT REACHED, COULD NOT GENERATE INVOICE')
+      throw(:abort)
     end
 
-    return if number <= Setting.invoice_number_max.to_i
-
-    errors.add(:base, I18n.t('failed_to_generate_invoice_invoice_number_limit_reached'))
-    logger.error('INVOICE NUMBER LIMIT REACHED, COULD NOT GENERATE INVOICE')
-    throw(:abort)
+    self.number = JSON.parse(result.body)['invoice_number'].to_i
   end
 
   def to_s

app/services/eis_billing/get_invoice_number.rb

@@ -0,0 +1,27 @@
+module EisBilling
+  class GetInvoiceNumber < EisBilling::Base
+    attr_reader :invoice
+
+    def self.send_invoice
+      base_request
+    end
+
+    private
+
+    def self.base_request
+      uri = URI(invoice_generator_url)
+      http = Net::HTTP.new(uri.host, uri.port)
+      headers = {
+        'Authorization' => 'Bearer foobar',
+        'Content-Type' => 'application/json',
+        'Accept' => TOKEN
+      }
+
+      http.post(invoice_generator_url, nil, headers)
+    end
+
+    def self.invoice_generator_url
+      "#{BASE_URL}/api/v1/invoice_generator/invoice_number_generator"
+    end
+  end
+end