Class: Heisencoin::Market

Inherits:
Object
  • Object
show all
Defined in:
lib/heisencoin/market.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(half) ⇒ Market

Returns a new instance of Market.



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# File 'lib/heisencoin/market.rb', line 5

def initialize(half)
  @offers = []
  if half == :bid || half == :ask
    @half = half
  else
    raise "Bad market type parameter"
  end
end

Instance Attribute Details

#offers ⇒ Object

Returns the value of attribute offers.



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# File 'lib/heisencoin/market.rb', line 3

def offers
  @offers
end

Instance Method Details

#better_than(a, b) ⇒ Object 



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# File 'lib/heisencoin/market.rb', line 43

def better_than(a,b)
  if @half == :ask
    a < b
  elsif @half == :bid
    a > b
  end
end

#drop_offers(exchange) ⇒ Object 



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# File 'lib/heisencoin/market.rb', line 21

def drop_offers(exchange)
  offers.reject!{|o| o.exchange == exchange}
end

#import(exchange, offers) ⇒ Object 



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# File 'lib/heisencoin/market.rb', line 14

def import(exchange, offers)
  offers.each do |raw_offer|
    offer = Offer.from_array(exchange, [raw_offer.first, raw_offer.last])
    sorted_insert(@offers, offer) {|offer| offer.price}
  end
end

#offers_better_than(price) ⇒ Object 



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# File 'lib/heisencoin/market.rb', line 51

def offers_better_than(price)
  offers.select{|offer| better_than(offer.price, price)}
end

#sorted_insert(array, element) ⇒ Object 



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# File 'lib/heisencoin/market.rb', line 25

def sorted_insert(array, element)
  value = yield element
  if array.length == 0 || better_than(value, (yield array[0]))
    array.unshift(element)
  else
    last_index = array.length-1
    for idx in 0..last_index
      if not better_than((yield array[idx]), value)
        array.insert(idx, element)
        break
      end
      if idx == last_index
        array.push(element)
      end
    end
  end
end