Get time stamp of last backup for given Aiven service

aiven-last-backup.rb

#!/usr/bin/env ruby

# Binaries and Defaults
# -----------------------------------------------------------------------

#######################################################################
# Do not change anything below
#######################################################################

require 'optparse'
require 'ostruct'
require 'rest-client'
require 'json'
require 'time'

# Classes, modules, methods
# -----------------------------------------------------------------------

class Client

  API_HOST = 'https://api.aiven.io'
  API_VERSION = 'v1'

  def initialize(email:, password:, otp: nil, project: nil, service: nil, options: {})
    @email = email
    @password = password
    @otp = otp
    @host = options.fetch(:host, API_HOST)
    @version = options.fetch(:path, API_VERSION)
    @token = get_token
    @project = project
    @service = service
  end

  def last_backup_time
    str = last_backup.fetch('backup_time')
    Time.parse(str)
  end

  def last_backup
    service_backups.last
  end

  def service_backups
    get_service_details(project: @project, service: @service) unless @service_details
    @service_details.fetch('backups')
  end

  def get_service_details(project:, service:)
    url = [base_url, 'project', project, 'service', service].join('/')
    response = RestClient.get url, authorization_header
    @service_details = JSON.parse(response.body).fetch('service')
  end

  private

  def get_token
    payload = { email: @email, password: @password }
    payload[:otp] = @otp unless @otp.nil? || @otp.empty?
    response = RestClient.post token_url, payload.to_json, {content_type: :json, accept: :json}
    raise RunTimeError unless response.code == 200
    JSON.parse(response.body).fetch('token')
  end

  def base_url
    [@host, @version].join('/')
  end

  def token_url
    [base_url, 'userauth'].join('/')
  end

  def authorization_header
    {
      authorization: "aivenv1 #{@token}",
      content_type: :json,
      accept: :json
    }
  end

end

# Process arguments
# -----------------------------------------------------------------------

options = OpenStruct.new
options.email = ''
options.otp = ''
options.password = ''
options.project = ''
options.service = ''
options.verbose = false

opts = OptionParser.new do |opts|
  opts.banner = "Description: Retrieves the date of the latest Aiven snapshot.\n\n"
  opts.banner += "Usage: #{opts.program_name}.rb [options]"
  opts.separator ""
  opts.separator "Options: "
  opts.on("-e", "--email EMAIL", "The account email address") do |x|
    options.email = x
  end
  opts.on("-o", "--otp OTP", "The account one-time password") do |x|
    options.otp = x
  end
  opts.on("-p", "--password PASSWORD", "The account password") do |x|
    options.password = x
  end
  opts.on("-j", "--project PROJECT", "The aiven project") do |x|
    options.project = x
  end
  opts.on("-s", "--service SERVICE", "The aiven service") do |x|
    options.service = x
  end
  opts.on("-v", "--verbose", "Display verbose output.") do |x|
    options.verbose = x
  end
  opts.on_tail("-h", "--help", "Show this usage statement") do |x|
    puts opts
    exit
  end
  opts.on_tail ""
  opts.on_tail "Example: #{opts.program_name}.rb -e john@example.com -p ABCXYZ -o 123 -j ax -s chop"
end

begin
  opts.parse!(ARGV)
rescue Exception => e
  puts e
  exit
end

# Test
#----------------------------------------------------------------------

if options.email.empty?
  puts 'Enter your email address: '
  options.email = gets.chomp
end

if options.password.empty?
  begin
    system 'stty -echo'
    puts 'Enter your password: '
    options.password = gets.chomp
  ensure
    system 'stty echo'
  end
  if options.otp.empty?
    puts 'Enter your one-time password: '
    options.otp = gets.chomp
  end
end

if options.project.empty?
  puts 'Enter the aiven project: '
  options.project = gets.chomp
end

if options.service.empty?
  puts 'Enter the aiven service: '
  options.service = gets.chomp
end

# Main
#----------------------------------------------------------------------

client = Client.new(
  email: options.email,
  password: options.password,
  otp: options.otp,
  project: options.project,
  service: options.service
)
puts "Last backup: #{client.last_backup_time}"