Class: LedgerWeb::YahooPriceLookup

Inherits:
Object
  • Object
show all
Defined in:
lib/ledger_web/price_lookup.rb

Instance Method Summary collapse

Constructor Details

#initialize(symbol, min_date, max_date) ⇒ YahooPriceLookup

Returns a new instance of YahooPriceLookup.



7
8
9
10
11
 
# File 'lib/ledger_web/price_lookup.rb', line 7

def initialize(symbol, min_date, max_date)
  @symbol = symbol
  @min_date = min_date
  @max_date = max_date
end

Instance Method Details

#lookup ⇒ Object 



13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
 
# File 'lib/ledger_web/price_lookup.rb', line 13

def lookup
  params = {
    'a' => @min_date.month - 1,
    'b' => @min_date.day,
    'c' => @min_date.year,
    'd' => @max_date.month - 1,
    'e' => @max_date.day,
    'f' => @max_date.year,
    's' => @symbol,
    'ignore' => '.csv',
  }

  query = params.map { |k,v| "#{k}=#{v}" }.join("&")
  uri = URI.parse("http://ichart.finance.yahoo.com/table.csv?#{query}")
  response = Net::HTTP.get_response(uri)

  if response.code != '200'
    return []
  end

  rows = []
  CSV.parse(response.body, :headers => true) do |row|
    rows << [Date.parse(row["Date"]), row["Close"].to_f]
  end
  rows
end