Class: GMoney::FeedParser

Inherits:
Object
  • Object
show all
Defined in:
lib/gmoney/feed_parser.rb

Class Method Summary collapse

Class Method Details

.parse_feed(feed, feed_class, options = {:feed_link => true, :symbol => false}) ⇒ Object 



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# File 'lib/gmoney/feed_parser.rb', line 3

def self.parse_feed(feed, feed_class, options = {:feed_link => true, :symbol => false})
  doc = REXML::Document.new(feed)
  finance_objects = []      
  feed_class_string = feed_class.to_s.gsub("GMoney::", "").downcase
  
  set_ivar = lambda do |target, name, value|
    value = value.to_f if value.is_numeric?
    target.instance_variable_set("@#{name.camel_to_us}", value)
  end

  doc.elements.each('//entry') do |parsed_entry|
    finance_object = feed_class.new
    finance_data = parsed_entry.elements["gf:#{feed_class_string}Data"]

    #TODO - have someone peer review this.  Is it bad practice to use instance_variable_set because
    #it breaks encapsulation? (Even though it actually enhances the encapsulation in the "domain" classes
    #by not allowing users to set attributes that should be read only (i.e. id, updated, return1w))
    finance_object.instance_variable_set("@id", parsed_entry.elements['id'].text)
    finance_object.instance_variable_set("@title", parsed_entry.elements['title'].text)
    finance_object.instance_variable_set("@updated", DateTime.parse(parsed_entry.elements['updated'].text))
    finance_object.instance_variable_set("@feed_link", parsed_entry.elements['gd:feedLink'].attributes['href']) if options[:feed_link]
    
    finance_data.attributes.each { |attr_name, attr_value| set_ivar.call(finance_object, attr_name, attr_value) }
    parsed_entry.elements['gf:symbol'].each { |attr_name, attr_value| set_ivar.call(finance_object, attr_name, attr_value)} if options[:symbol]

    #TODO - This is only going to work for USD for now.  Might need to updated to make a "Money" object to store amount and currency code.
    finance_data.elements.each do |cg|
      finance_object.instance_variable_set("@#{cg.name.camel_to_us}", cg.elements['gd:money'].attributes['amount'].to_f)
    end
    finance_objects << finance_object 
  end
  finance_objects
end