Class: Robut::Plugin::Weather

Inherits:
Object
  • Object
show all
Includes:
Robut::Plugin
Defined in:
lib/robut/plugin/weather.rb

Overview

What’s the current weather forecast?

Class Attribute Summary collapse

Attributes included from Robut::Plugin

#connection, #private_sender, #reply_to

Instance Method Summary collapse

Methods included from Robut::Plugin

#at_nick, #fake_message, included, #initialize, #nick, #reply, #sent_to_me?, #store, #without_nick, #words

Class Attribute Details

.default_location ⇒ Object

Returns the value of attribute default_location.



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# File 'lib/robut/plugin/weather.rb', line 9

def default_location
  @default_location
end

Instance Method Details

#bad_location?(location = "") ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/robut/plugin/weather.rb', line 122

def bad_location?(location = "")
  weather_data(location).search("forecast_information").empty?
end

#current_conditions(location) ⇒ Object 



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# File 'lib/robut/plugin/weather.rb', line 93

def current_conditions(location)
  doc = weather_data(location)
  condition = doc.search("current_conditions condition").first["data"]
  temperature = doc.search("current_conditions temp_f").first["data"]
  normalized_location = doc.search("forecast_information city").first["data"]
  "Weather for #{normalized_location}: #{condition}, #{temperature}F"
end

#forecast(location, day_of_week) ⇒ Object 



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# File 'lib/robut/plugin/weather.rb', line 101

def forecast(location, day_of_week)
  doc = weather_data(location)
  forecast = doc.search("forecast_conditions").detect{|el| c = el.children.detect{|c| c.name == "day_of_week"}; c && c["data"] == day_of_week}
  return "Can't find a forecast for #{day_of_week}" if forecast.nil?

  condition = forecast.children.detect{|c| c.name == "condition"}["data"]
  high = forecast.children.detect{|c| c.name == "high"}["data"]
  low = forecast.children.detect{|c| c.name == "low"}["data"]
  normalized_location = doc.search("forecast_information city").first["data"]
  "Forecast for #{normalized_location} on #{day_of_week}: #{condition}, High: #{high}F, Low: #{low}F"
end

#handle(time, sender_nick, message) ⇒ Object 



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# File 'lib/robut/plugin/weather.rb', line 22

def handle(time, sender_nick, message)
  # ignore messages that don't end in ?
  return unless message[message.length - 1, 1] == "?"
  message = message[0..message.length - 2]

  words = words(message)
  i = words.index("weather")

  # ignore messages that don't have "weather" in them
  return if i.nil?

  location = i.zero? ? self.class.default_location : words[0..i-1].join(" ")
  if location.nil?
    reply "I don't have a default location!"
    return
  end

  day_of_week = nil
  day_string = words[i+1..-1].join(" ").downcase
  if day_string != ""
    day_of_week = parse_day(day_string)
    if day_of_week.nil?
      reply "I don't recognize the date: \"#{day_string}\""
      return
    end
  end

  if bad_location?(location)
    reply "I don't recognize the location: \"#{location}\""
    return
  end

  if day_of_week
    reply forecast(location, day_of_week)
  else
    reply current_conditions(location)
  end
end

#parse_day(day) ⇒ Object 



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# File 'lib/robut/plugin/weather.rb', line 61

def parse_day(day)
  day_map = {
    "monday"    =>  "Mon",
    "mon"       =>  "Mon",
    "tuesday"   =>  "Tue",
    "tue"       =>  "Tue",
    "tues"      =>  "Tue",
    "wed"       =>  "Wed",
    "wednesday" =>  "Wed",
    "thurs"     =>  "Thu",
    "thu"       =>  "Thu",
    "thursday"  =>  "Thu",
    "friday"    =>  "Fri",
    "fri"       =>  "Fri",
    "saturday"  =>  "Sat",
    "sat"       =>  "Sat",
    "sunday"    =>  "Sun",
    "sun"       =>  "Sun",
  }
  if day_map.has_key?(day)
    return day_map[day]
  end

  if day == "tomorrow"
    return (Time.now + 60*60*24).strftime("%a")
  end

  if day == "today"
    return Time.now.strftime("%a")
  end
end

#usage ⇒ Object

Returns a description of how to use this plugin



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# File 'lib/robut/plugin/weather.rb', line 13

def usage
  [
    "#{at_nick} weather - returns the weather in the default location for today",
    "#{at_nick} weather tomorrow - returns the weather in the default location for tomorrow",
    "#{at_nick} weather <location> - returns the weather for <location> today",
    "#{at_nick} weather <location> Tuesday - returns the weather for <location> Tuesday"
  ]
end

#weather_data(location = "") ⇒ Object 



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# File 'lib/robut/plugin/weather.rb', line 113

def weather_data(location = "")
  @weather_data ||= {}
  @weather_data[location] ||= begin
    url = "http://www.google.com/ig/api?weather=#{URI.escape(location)}"
    Nokogiri::XML(open(url))
  end
  @weather_data[location]
end