pollen.rb

#!/usr/bin/env ruby
#
#  Created by Jonathan Lim on 2008-05-13.
#  Copyright (c) 2008. All rights reserved.

# Twitter pollen updates

# $: << File.expand_path(File.dirname(__FILE__) + '/../lib')

require "rubygems"
require "bundler/setup"

require 'open-uri'
require 'twitter'

require 'nokogiri'
require 'yaml'

twitter_client = Twitter::REST::Client.new do |config|
  config.consumer_key        = ENV["TWITTER_CONSUMER_KEY"]
  config.consumer_secret     = ENV["TWITTER_CONSUMER_SECRET"]
  config.access_token        = ENV["TWITTER_OAUTH_TOKEN"]
  config.access_token_secret = ENV["TWITTER_OAUTH_TOKEN_SECRET"]
end

BBC_WEATHER_LINK = "https://www.bbc.co.uk/weather/2643743"

# load BBC Pollen site
doc = Nokogiri::HTML(URI.open(BBC_WEATHER_LINK))

json_data = JSON.parse(doc.xpath("//script[@type='application/json']").children.first.inner_text)
pollen_value = json_data["data"]["forecasts"][0]["summary"]["report"]["pollenIndexText"]

# 20091103 - Adding type of pollen based on time of year
# Tree pollen forecasts from the 20th April to 19th May.
# Grass pollen forecasts from the 20th May to 4th August.
# Weed pollen forecasts from the 5th to 25th August.
# Fungal Spore forecasts from the 25th August to 30th November.

pollen_type = if ((Date.civil(Date.today.year, 4, 20))..(Date.civil(Date.today.year, 5, 19))).include?(Date.today)
  "Tree Pollen"
elsif ((Date.civil(Date.today.year, 5, 20))..(Date.civil(Date.today.year, 8, 4))).include?(Date.today)
  "Grass Pollen"
elsif ((Date.civil(Date.today.year, 8, 5))..(Date.civil(Date.today.year, 8, 25))).include?(Date.today)
  "Weed Pollen"
elsif ((Date.civil(Date.today.year, 8, 25))..(Date.civil(Date.today.year, 11, 30))).include?(Date.today)
  "Fungal Spore"
end

to_twitter = []
to_twitter << pollen_value
to_twitter << pollen_type unless pollen_type.nil?
to_twitter << "(" + Time.now.gmtime.strftime("%a %d/%m") + ')'

if pollen_value
  begin
    twitter_client.update(to_twitter.join(' '))
    # puts to_twitter.join(' ')
  rescue Exception => e
    puts "FAILED!"
    puts e
    puts e.backtrace
    exit 1
  end
end