Add balance auto reload

Closes #329

app/models/ability.rb

@@ -72,6 +72,7 @@ class Ability
     can(:manage, Invoice) { |i| i.buyer_id == @user.registrar_id }
     can :manage, :deposit
     can :read, AccountActivity
+    can :manage, :balance_auto_reload
   end
 
   def customer_service # Admin/admin_user dynamic role

app/models/balance_auto_reload_types/threshold.rb

@@ -0,0 +1,25 @@
+module BalanceAutoReloadTypes
+  class Threshold
+    include ActiveModel::Model
+
+    attr_accessor :amount
+    attr_accessor :threshold
+
+    validates :amount, numericality: { greater_than_or_equal_to: :min_amount }
+    validates :threshold, numericality: { greater_than_or_equal_to: 0 }
+
+    def min_amount
+      Setting.minimum_deposit
+    end
+
+    def as_json(options)
+      { name: name }.merge(super)
+    end
+
+    private
+
+    def name
+      self.class.name.demodulize.underscore
+    end
+  end
+end

app/models/bank_transaction.rb

@@ -79,13 +79,23 @@ class BankTransaction < ActiveRecord::Base
   end
 
   def create_activity(registrar, invoice)
-    create_account_activity(
-      account: registrar.cash_account,
-      invoice: invoice,
-      sum: invoice.subtotal,
-      currency: currency,
-      description: description,
-      activity_type: AccountActivity::ADD_CREDIT
-    )
+    ActiveRecord::Base.transaction do
+      create_account_activity!(account: registrar.cash_account,
+                               invoice: invoice,
+                               sum: invoice.subtotal,
+                               currency: currency,
+                               description: description,
+                               activity_type: AccountActivity::ADD_CREDIT)
+      reset_pending_registrar_balance_reload
+    end
+  end
+
+  private
+
+  def reset_pending_registrar_balance_reload
+    return unless registrar.settings['balance_auto_reload']
+
+    registrar.settings['balance_auto_reload'].delete('pending')
+    registrar.save!
   end
 end

app/models/invoice.rb

@@ -98,6 +98,11 @@ class Invoice < ActiveRecord::Base
     generator.as_pdf
   end
 
+  def to_e_invoice
+    generator = Invoice::EInvoiceGenerator.new(self)
+    generator.generate
+  end
+
   private
 
   def apply_default_buyer_vat_no

app/models/invoice/e_invoice_generator.rb

@@ -0,0 +1,77 @@
+class Invoice
+  class EInvoiceGenerator
+    attr_reader :invoice
+
+    def initialize(invoice)
+      @invoice = invoice
+    end
+
+    def generate
+      seller = EInvoice::Seller.new
+      seller.name = invoice.seller_name
+      seller.registration_number = invoice.seller_reg_no
+      seller.vat_number = invoice.seller_vat_no
+
+      seller_legal_address = EInvoice::Address.new
+      seller_legal_address.line1 = invoice.seller_street
+      seller_legal_address.line2 = invoice.seller_state
+      seller_legal_address.postal_code = invoice.seller_zip
+      seller_legal_address.city = invoice.seller_city
+      seller_legal_address.country = invoice.seller_country
+      seller.legal_address = seller_legal_address
+
+      buyer = EInvoice::Buyer.new
+      buyer.name = invoice.buyer_name
+      buyer.registration_number = invoice.buyer_reg_no
+      buyer.vat_number = invoice.buyer_vat_no
+      buyer.email = invoice.buyer.billing_email
+
+      buyer_bank_account = EInvoice::BankAccount.new
+      buyer_bank_account.number = invoice.buyer.e_invoice_iban
+      buyer.bank_account = buyer_bank_account
+
+      buyer_legal_address = EInvoice::Address.new
+      buyer_legal_address.line1 = invoice.buyer_street
+      buyer_legal_address.line2 = invoice.buyer_state
+      buyer_legal_address.postal_code = invoice.buyer_zip
+      buyer_legal_address.city = invoice.buyer_city
+      buyer_legal_address.country = invoice.buyer_country
+      buyer.legal_address = buyer_legal_address
+
+      e_invoice_invoice_items = []
+      invoice.each do |invoice_item|
+        e_invoice_invoice_item = EInvoice::InvoiceItem.new.tap do |i|
+          i.description = invoice_item.description
+          i.price = invoice_item.price
+          i.quantity = invoice_item.quantity
+          i.unit = invoice_item.unit
+          i.subtotal = invoice_item.subtotal
+          i.vat_rate = invoice_item.vat_rate
+          i.vat_amount = invoice_item.vat_amount
+          i.total = invoice_item.total
+        end
+        e_invoice_invoice_items << e_invoice_invoice_item
+      end
+
+      e_invoice_invoice = EInvoice::Invoice.new.tap do |i|
+        i.seller = seller
+        i.buyer = buyer
+        i.items = e_invoice_invoice_items
+        i.number = invoice.number
+        i.date = invoice.issue_date
+        i.recipient_id_code = invoice.buyer_reg_no
+        i.reference_number = invoice.reference_no
+        i.due_date = invoice.due_date
+        i.beneficiary_name = invoice.seller_name
+        i.beneficiary_account_number = invoice.seller_iban
+        i.payer_name = invoice.buyer_name
+        i.subtotal = invoice.subtotal
+        i.vat_amount = invoice.vat_amount
+        i.total = invoice.total
+        i.currency = invoice.currency
+      end
+
+      EInvoice::EInvoice.new(date: Time.zone.today, invoice: e_invoice_invoice)
+    end
+  end
+end

app/models/registrar.rb

@@ -165,6 +165,10 @@ class Registrar < ActiveRecord::Base
     notifications.create!(text: text)
   end
 
+  def e_invoice_iban
+    iban
+  end
+
   private
 
   def set_defaults