Class WeatherReportForecasts::WeatherReportForecast
In: lib/weather_report.rb
Parent: Object

A forecast for a single day

Methods

day_diff   new  

Constants

SUMMARY = /([\w -\/]+): ([\w -]+|N\/A|NA|\(none\)), Max Temp: (.*)/m
DESCRIPTION = /Max Temp: ([-\d\.]+|N\/A|NA|\(none\))(.+)Min Temp: ([-\d\.]+|N\/A|NA|\(none\))(.+)Wind Direction: ([\w -\/\(\)]*), Wind Speed: ([-\d\.]+|N\/A|NA|\(none\))mph, Visibility: ([\w -\/]+), Pressure: ([\d\.]+|N\/A|NA|\(none\))m([bB]), Humidity: ([\d\.]+|N\/A|NA|\(none\))(.*), (.+)/m

Attributes

advance_days  [R] 
date  [R] 
description  [R] 
humidity  [R] 
max_temperature  [R] 
min_temperature  [R] 
pressure  [R] 
visibility  [R] 
wind_direction  [R] 
wind_speed  [R] 

Public Class methods

new(item)

Constructs the single day forecast from an REXML element containing the forecast in BBC Backstage weather format

[Source]

# File lib/weather_report.rb, line 191
    def initialize(item)
      item.elements.each("title[1]") { |element| 
        md = SUMMARY.match(element.text)
        @description = md[2]
        @advance_days = day_diff(md[1])
        raise(WeatherReport::WeatherReportFormatError, "WeatherReport Error: Day mismatch.") if @advance_days.nil?
        @date = Date.today+@advance_days 
      }
        
      item.elements.each("description[1]") { |element| 
        md = DESCRIPTION.match(element.text)
        @max_temperature = md[1].to_f
        @min_temperature = md[3].to_f
        @wind_direction = md[5]
        @wind_speed = md[6].to_f * 1.61
        @visibility = md[7]
        @pressure = md[8].to_f
        @humidity = md[10].to_f
      }
    end

Protected Instance methods

day_diff(day_from)

Calculate the number of days the given day name is from today‘s day name assuming it is no more than 5 days in the future or no further back than yesterday. Eg. If today is Wednesday, then if passed Tuesday this function will return -1, if passed Friday it will return 2, and if passed Wednesday it will return 0.

[Source]

# File lib/weather_report.rb, line 216
    def day_diff(day_from) 
      start = Date::DAYNAMES.index(day_from.downcase.gsub!(/^[a-z]|\s+[a-z]/) { |a| a.upcase })
      return if start.nil?
      finish = Date.today.wday
      result =  start - finish
      result = result+7 if result < -1
      result = result-7 if result >5
      result
    end

[Validate]