Polls the Jack FM website every 60 seconds to see what song they're playing, and records it to an SQLite database. More details at https://danq.me/2017/03/13/jack-fm/.

jack-fm-logger.rb

#!/usr/local/rvm/wrappers/ruby-2.3.0@jack-fm-logger/ruby
require 'open-uri'
require 'sqlite3'
require 'nokogiri'

# Load DB, create schema if absent
db = SQLite3::Database.new 'log.db'
db.execute "CREATE TABLE IF NOT EXISTS plays (time INTEGER, artist TEXT, song TEXT);"

# Utility functions
def wait(seconds = 60)
  tx = Time.now + seconds
  sleep(tx - Time.now) while(tx > Time.now)
end

# Logger
last = [nil, nil]
printf "%-23s | %-20s | %s\n", 'Time', 'Artist', 'Song'
while true do
  html = Nokogiri::HTML(open("http://www.jackfm.co.uk/oxfordshire/"))
  artist, song = html.at_css('.now-playing__artist strong').text, html.at_css('.now-playing__song').text
  if last != [artist, song]
    # song has changed since we last checked
    printf "%-23s | %-20s | %s\n", Time.now.utc, artist, song
    db.execute "INSERT INTO plays (time, artist, song) VALUES (?, ?, ?)", Time.now.utc.to_i, artist, song
    last = [artist, song]
  end
  wait # for a minute
end