Class: NbpExchange::CurrencyXml

Inherits:
Object
  • Object
show all
Defined in:
lib/nbp_exchange/currency_xml.rb

Constant Summary collapse

DIR_URL = 
"http://nbp.pl/kursy/xml/dir.txt"
XML_URL = 
"http://rss.nbp.pl/kursy/xml2/%{year}/a/%{xml_name}"

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(date) ⇒ CurrencyXml

Returns a new instance of CurrencyXml.



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# File 'lib/nbp_exchange/currency_xml.rb', line 8

def initialize(date)
  @date = date
end

Instance Attribute Details

#date ⇒ Object

Returns the value of attribute date.



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# File 'lib/nbp_exchange/currency_xml.rb', line 7

def date
  @date
end

Instance Method Details

#open_xml ⇒ Object 



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# File 'lib/nbp_exchange/currency_xml.rb', line 12

def open_xml
  open(xml_url).read
end

#xml_name ⇒ Object

Raises:



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# File 'lib/nbp_exchange/currency_xml.rb', line 16

def xml_name
  item = nil
  xml_names_list.each_line do |line|
    if line.match /a([0-9]+)z#{@date.strftime '%y%m%d'}/
      item = line
    end
  end
  raise NoXMLForThisDate unless item

  @date.strftime '%y' + item[0, 4] + '.xml'
end

#xml_names_list ⇒ Object 



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# File 'lib/nbp_exchange/currency_xml.rb', line 28

def xml_names_list
  @xml_names_list ||= open(DIR_URL).read
end

#xml_url ⇒ Object 



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# File 'lib/nbp_exchange/currency_xml.rb', line 32

def xml_url
  XML_URL % {:year => @date.year, :xml_name => xml_name}
end