Import exported esa markdowns to new esa team

import_esa2esa.rb

require 'esa'
require 'pp'
require 'find'

class EsaExportedMarkdown
  attr_reader :title, :category, :tags, :created_at, :updated_at, :published, :number, :body
  INDEX_DATA_START = 1
  INDEX_DATA_END = 7
  INDEX_BODY_START = 10
  def initialize(file_path)
    File.open(file_path) do |file|
      md = file.read
      key_vals = md.split("\n")[INDEX_DATA_START..INDEX_DATA_END]
      key_vals.each do |key_val|
        if /^(?<key>.+): \"?(?<val>.+?)\"?$/ =~ key_val
          instance_variable_set("@#{key}".to_sym, val)
        end
      end
      @body = md.split("\n")[INDEX_BODY_START..-1].join("\n")
    end
  end

  def to_params
    {
      name: title,
      category: category,
      tags: tags,
      body_md: body,
      wip: false,
      message: '[skip notice] Imported from other esa',
      # user: 'hoge', # need owner rights to override user
    }
  end
end

class Importer
  def initialize(client, dir, base_cat = '')
    @client = client
    @dir = dir
    @base_cat = base_cat
  end
  attr_accessor :client, :dir, :base_cat

  def wait_for(seconds)
    (seconds / 10).times do
      print '.'
      sleep 10
    end
    puts
  end

  def import(dry_run: true)
    Find.find(dir) do |file_path|
      next unless file_path.end_with?('.md')
      params = EsaExportedMarkdown.new(file_path).to_params
      params[:category] = "#{base_cat}/#{params[:category]}" if base_cat != ''

      if dry_run
        puts "***** #{file_path} *****"
        pp params
        puts
        next
      end
      
      puts "start #{file_path}"
      response = client.create_post(params)
      case response.status
      when 201
        puts "created: #{response.body['full_name']}"
        sleep 5
      when 429
        retry_after = (response.headers['Retry-After'] || 20 * 60).to_i
        puts "rate limit exceeded: will retry after #{retry_after} seconds."
        wait_for(retry_after)
        redo
      else
        puts "failure with status: #{response.status} #{response.inspect}"
        exit 1
      end
    end
  end
end

client = Esa::Client.new(
  access_token: 'your secret token',
  current_team: 'dst_team' # destination of sub domain
)
importer = Importer.new(client, 'exported_dir', 'dest/product')

# remove dry_run after test
importer.import(dry_run: false)