Class: Currency::Exchange::Rate::Source::TheFinancials

Inherits:
Provider show all
Defined in:
lib/currency/exchange/rate/source/the_financials.rb

Overview

Connects to www.thefinancials.com and parses XML.

This is for demonstration purposes.

Constant Summary collapse

PIVOT_CURRENCY =

Defines the pivot currency for thefinancials.com/.

:USD

Instance Attribute Summary

Attributes inherited from Provider

#date, #uri, #uri_path

Attributes inherited from Base

#pivot_currency, #time_quantitizer, #verbose

Instance Method Summary collapse

Methods inherited from Provider

#available?, #date_DD, #date_MM, #date_YYYY, #get_page_content, #get_rate, #get_uri, #rates

Methods inherited from Base

#__subclass_responsibility, #clear_rate, #convert, #currencies, #get_rate, #get_rate_base, #get_rates, #new_rate, #normalize_time, #rate, #rates, #to_s

Constructor Details

#initialize(*opt) ⇒ TheFinancials

Returns a new instance of TheFinancials.



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# File 'lib/currency/exchange/rate/source/the_financials.rb', line 19

def initialize(*opt)
  @raw_rates = nil
  self.uri_path = 'syndicated/UNKNOWN/fxrates.xml'
  super(*opt)
  self.uri = "http://www.thefinancials.com/#{self.uri_path}"
end

Instance Method Details

#clear_rates ⇒ Object 



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# File 'lib/currency/exchange/rate/source/the_financials.rb', line 38

def clear_rates
  @raw_rates = nil
  super
end

#load_rates(time = nil) ⇒ Object

Return a list of known base rates.



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# File 'lib/currency/exchange/rate/source/the_financials.rb', line 84

def load_rates(time = nil)
  self.date = time
  parse_rates
end

#name ⇒ Object

Returns ‘thefinancials.com’.



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# File 'lib/currency/exchange/rate/source/the_financials.rb', line 28

def name
  'thefinancials.org'
end

#parse_rates(data = nil) ⇒ Object

Parses XML for rates.



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# File 'lib/currency/exchange/rate/source/the_financials.rb', line 51

def parse_rates(data = nil)
  data = get_page_content unless data
  
  rates = [ ]

  @raw_rates = { }

  # $stderr.puts "parse_rates: data = #{data}"

  doc = REXML::Document.new(data).root
  doc.elements.to_a('//record').each do | record |
    c1_c2 = record.elements.to_a('symbol')[0].text
    md = /([A-Z][A-Z][A-Z]).*?([A-Z][A-Z][A-Z])/.match(c1_c2)
    c1, c2 = md[1], md[2]

    c1 = c1.upcase.intern
    c2 = c2.upcase.intern
    
    rate = record.elements.to_a('last')[0].text.to_f

    date = record.elements.to_a('date')[0].text
    date = Time.parse("#{date} 12:00:00 -05:00") # USA NY => EST

    rates << new_rate(c1, c2, rate, date)

    (@raw_rates[c1] ||= { })[c2] ||= rate
  end

  rates
end

#raw_rates ⇒ Object 



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# File 'lib/currency/exchange/rate/source/the_financials.rb', line 44

def raw_rates
  rates
  @raw_rates
end

#test_content ⇒ Object 



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# File 'lib/currency/exchange/rate/source/the_financials.rb', line 90

def test_content
  <<EOF
<?xml version="1.0" ?> 
<TFCRecords>
<record>
<symbol>USD/EUR</symbol> 
<date>10/25/2001</date> 
<last>1.115822</last> 
</record>
<record>
<symbol>USD/AUD</symbol> 
<date>10/25/2001</date> 
<last>1.975114</last> 
</record>
<record>
<symbol>USD/CAD</symbol> 
<date>10/25/2001</date> 
<last>1.57775</last> 
</record>
<record>
<symbol>USD/CNY</symbol> 
<date>10/25/2001</date> 
<last>8.2769</last> 
</record>
<record>
<symbol>USD/ESP</symbol> 
<date>10/25/2001</date> 
<last>185.65725</last> 
</record>
<record>
<symbol>USD/GBP</symbol> 
<date>10/25/2001</date> 
<last>0.698849867830019</last> 
</record>
<record>
<symbol>USD/HKD</symbol> 
<date>10/25/2001</date> 
<last>7.7999</last> 
</record>
<record>
<symbol>USD/IDR</symbol> 
<date>10/25/2001</date> 
<last>10265</last> 
</record>
<record>
<symbol>USD/INR</symbol> 
<date>10/25/2001</date> 
<last>48.01</last> 
</record>
<record>
<symbol>USD/JPY</symbol> 
<date>10/25/2001</date> 
<last>122.68</last> 
</record>
<record>
<symbol>USD/KRW</symbol> 
<date>10/25/2001</date> 
<last>1293.5</last> 
</record>
<record>
<symbol>USD/MYR</symbol> 
<date>10/25/2001</date> 
<last>3.8</last> 
</record>
<record>
<symbol>USD/NZD</symbol> 
<date>10/25/2001</date> 
<last>2.41485</last> 
</record>
<record>
<symbol>USD/PHP</symbol> 
<date>10/25/2001</date> 
<last>52.05</last> 
</record>
<record>
<symbol>USD/PKR</symbol> 
<date>10/25/2001</date> 
<last>61.6</last> 
</record>
<record>
<symbol>USD/SGD</symbol> 
<date>10/25/2001</date> 
<last>1.82615</last> 
</record>
<record>
<symbol>USD/THB</symbol> 
<date>10/25/2001</date> 
<last>44.88</last> 
</record>
<record>
<symbol>USD/TWD</symbol> 
<date>10/25/2001</date> 
<last>34.54</last> 
</record>
</TFCRecords>
EOF
end