Get DDBJ SRA download URLs from BioProject id

ddbj_sra_urls.rb

# DDBJ SRA URL Getter
# author: kojix2

require 'net/http'
require 'json'
require 'tty-spinner'

project_id = ARGV[0]
if project_id.nil?
  warn 'Error: No project name.'
  exit 1
end

def json_url(uri)
  uri = URI.parse(uri)
  dat = Net::HTTP.get(uri)
  JSON.parse(dat)
end

bioproject = json_url("https://ddbj.nig.ac.jp/resource/bioproject/#{project_id}.json")

spinner = TTY::Spinner.new('[:spinner] Loading ...', format: :pulse_2)
spinner.auto_spin

urls = []

bioproject['dbXrefs'].each do |i|
  next if i['type'] != 'sra-run'

  sra_run = json_url(i['url'] + '.json')
  sra_run['downloadUrl'].each do |u|
    next if u['type'] != 'sra'

    urls << u['url']
  end
end

spinner.stop('Done!')

puts urls