Cold Sholder

This is a VERY quick and dirty script I threw together to see if the conditions were right to go skating on a local pond (based on a friends best guess).

Simply, it checks an online weather service for the overnight temperatures of the past 10 days and if every night maintained temperatures below freezing, tells you to go skating. Otherwise, no skating for you.

require 'rubygems'
require 'simplehttp'
require 'time'

class TimedWeather
 attr_accessor :date_time, :temp
 
 def initialize(date_time_string, temp_string)
  @date_time = DateTime.strptime(date_time_string, '%Y-%m-%d %H:%M:%S')
  @temp = temp_string.to_f
 end
 
 def to_s
  "[(#{@date_time})-(#{@temp})"
 end
end

def build_daily_url(date)
 "http://www.wunderground.com/weatherstation/WXDailyHistory.asp?ID=KMOSTLOU11&day=#{date.day}&year=#{date.year}&month=#{date.month}&format=1"
end

def find_timed_weather_for_date(date = Date.today)
 response = SimpleHttp.get(build_daily_url(date))
 records = response.gsub(/\n<br>/, '').gsub(/<br>/, '').split(/\n/)[2...-1]
 records.map do |text_record|
  split = text_record.split(/,/)
  TimedWeather.new(split[0], split[1])
 end
end

def conducive_day?(daily_temps)
 not daily_temps.select { |time| conducive_time?(time) }.map { |temp| conducive_temp?(temp) }.include?(false)
end

def conducive_time?(time)
 time.date_time.hour > 17 or time.date_time.hour < 6
end

def conducive_temp?(temp)
 temp.temp < 32.0
end

conducive = true

(0..9).each do |offset|
 if not conducive_day?(find_timed_weather_for_date(Date.today - offset))
  conducive = false
  break
 end
end

if conducive
 puts "GO SKATE! ...... maybe"
else
 puts "NO SKATING TODAY!"
end