Class: SeatSelector::Finder

Inherits:
Object
  • Object
show all
Defined in:
lib/seat_selector/finder.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(venue) ⇒ Finder

Returns a new instance of Finder.



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# File 'lib/seat_selector/finder.rb', line 5

def initialize(venue)
  @seats = venue.available_seats
  set_distance!(venue.total_columns)
end

Instance Attribute Details

#seats ⇒ Object (readonly)

Returns the value of attribute seats.



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# File 'lib/seat_selector/finder.rb', line 3

def seats
  @seats
end

Instance Method Details

#get_best_seats(seats_needed = 1) ⇒ Object 



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# File 'lib/seat_selector/finder.rb', line 10

def get_best_seats(seats_needed = 1)
  return [] if seats_needed < 1
  best_seat = nil
  best_distance = nil
  @seats.each do |r, seats_in_row| # skip rows with no open seats
    # search the current row
    seats_in_row.each do |c, seat|
      if seats_needed == 1
        if best_seat.nil? || best_seat.distance > seat.distance
          best_seat = seat
          best_distance = seat.distance
        end
      else
        # check rightward from current seat
        valid_group = (c + 1).upto(c + seats_needed - 1).all?{|i| seats_in_row.key?(i) }
        if valid_group
          distance = (c).upto(c + seats_needed - 1).inject(0) do |sum, i| 
            sum + seats_in_row[i].distance
          end
          if best_seat.nil? || best_distance > distance
            best_seat = seat
            best_distance = distance
          end
        end
      end
    end      
  end
  
  return [] if best_seat.nil?

  if seats_needed > 1
    seats_needed.times.map {|i| @seats[best_seat.row][best_seat.column + i] }
  else
    [best_seat]
  end
end