Print valid query options from a URL

clean-url

#!/usr/bin/env ruby

##
#  $ clean-url "http://services.pco.dev/songs?arrangement_name=&author=&bpm_max=&bpm_min=&commit=Apply+Filter&filtered_ministry_path=%2F13%2F14%2F18%2F&key_name=&lyrics=&meter=&music_key=&music_key_end=&music_key_end_major=Major&music_key_major=Major&selection_arrangement_field_15=true&selection_song_option_72=true&song_name=&themes=&utf8=%E2%9C%93"
#
#    ******************************************************
#    *                           commit => Apply+Filter   *
#    *           filtered_ministry_path => /13/14/18/     *
#    *              music_key_end_major => Major          *
#    *                  music_key_major => Major          *
#    *   selection_arrangement_field_15 => true           *
#    *         selection_song_option_72 => true           *
#    ******************************************************
#
##

require 'uri'

url = ARGV[0]

fail 'No URL' if url == nil

uri = URI.parse(url)

results = {}.tap do |hash|
  uri.query.split('&').each do |q|
    sub = q.split('=')
    next unless sub.count == 2
    next if sub.first == 'utf8'
    hash[URI.unescape(sub.first)] = URI.unescape(sub.last)
  end
end

max_key = results.keys.max_by(&:length).length
max_val = results.values.max_by(&:length).length
padding = 12

puts "*" * (max_key + max_val + padding)
results.sort.each do |k, v|
  puts "*   #{k.rjust(max_key)} => #{v.ljust(max_val)}   *"
end
puts "*" * (max_key + max_val + padding)