Class: OffsitePayments::Integrations::CheckoutFinland::Helper

Inherits:
Helper
  • Object
show all
Includes:
ActiveUtils::PostsData
Defined in:
lib/offsite_payments/integrations/checkout_finland.rb

Instance Attribute Summary

Attributes inherited from Helper

#fields

Instance Method Summary collapse

Methods inherited from Helper

#add_fields, #add_raw_html_field, #billing_address, #form_method, inherited, mapping, #raw_html_fields, #shipping_address, #test?

Methods included from MoneyCompatibility

#to_cents

Constructor Details

#initialize(order, account, options = {}) ⇒ Helper

Returns a new instance of Helper.



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# File 'lib/offsite_payments/integrations/checkout_finland.rb', line 16

def initialize(order, , options = {})
  md5secret options.delete(:credential2)
  super

  # Add default fields
  add_field("VERSION", "0001") # API version
  add_field("ALGORITHM", "3") # Return MAC version (3 is HMAC-SHA256)
  add_field("TYPE", "0")
  add_field("DEVICE", "1") # Offsite payment by default
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method in the class OffsitePayments::Helper

Instance Method Details

#add_field(name, value) ⇒ Object

Apply parameter length limitations recommended by Checkout.fi



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# File 'lib/offsite_payments/integrations/checkout_finland.rb', line 37

def add_field(name, value)
  return if name.blank? || value.blank?
  @fields[name.to_s] = check_param_length(name_to_s, value.to_s)
end

#check_param_length(name, value) ⇒ Object

API parameter length limitations specified by Checkout.fi Parameters longer than this cause the HTTP POST to fail



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# File 'lib/offsite_payments/integrations/checkout_finland.rb', line 44

def check_param_length(name, value)
  # Soft limitations, fields that can be clipped
  max_length_substring = { "FIRSTNAME" => 40, "FAMILYNAME" => 40, "ADDRESS" => 40, "POSTCODE" => 14, "POSTOFFICE" => 18, "MESSAGE" => 1000, "EMAIL" => 200, "PHONE" => 30 }
  # Hard limitations, fields that cannot be clipped
  max_length_exception = { "RETURN" => 300, "CANCEL" => 300, "REJECT" => 300, "DELAYED" => 300, "STAMP" => 20, "AMOUNT" => 8, "REFERENCE" => 20, "CONTENT" => 2, "LANGUAGE" => 2, "MERCHANT" => 20, "COUNTRY" => 3, "CURRENCY" => 3, "DELIVERY_DATE" => 8 }
  if max_length_substring.include? name
    return value.to_s[0, max_length_substring[name]]
  end
  if max_length_exception.include? name
    if value.to_s.length > max_length_exception[name]
      raise ArgumentError, "Field #{name} length #{value.length} is longer than permitted by provider API. Maximum length #{max_length_exception[name]}."
    else
      return value
    end
  end
  value
end

#form_fields ⇒ Object

Add MAC to form fields



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# File 'lib/offsite_payments/integrations/checkout_finland.rb', line 32

def form_fields
  @fields.merge("MAC" => generate_md5string)
end

#generate_md5string ⇒ Object

Calculate MAC



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# File 'lib/offsite_payments/integrations/checkout_finland.rb', line 63

def generate_md5string
  fields = [@fields["VERSION"], @fields["STAMP"], @fields["AMOUNT"], @fields["REFERENCE"],
            @fields["MESSAGE"], @fields["LANGUAGE"], @fields["MERCHANT"], @fields["RETURN"],
            @fields["CANCEL"], @fields["REJECT"], @fields["DELAYED"], @fields["COUNTRY"],
            @fields["CURRENCY"], @fields["DEVICE"], @fields["CONTENT"], @fields["TYPE"],
            @fields["ALGORITHM"], @fields["DELIVERY_DATE"], @fields["FIRSTNAME"], @fields["FAMILYNAME"],
            @fields["ADDRESS"], @fields["POSTCODE"], @fields["POSTOFFICE"], @md5secret]
   fields = fields.join("+")
   Digest::MD5.hexdigest(fields).upcase 
end

#md5secret(value) ⇒ Object 



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# File 'lib/offsite_payments/integrations/checkout_finland.rb', line 27

def md5secret(value)
  @md5secret = value
end