normalize.rake

require 'json'
require 'json/pure/generator'

module JSON::Pure::Generator::GeneratorMethods
  %i(Fixnum Bignum).each do |constant|
    const_set constant, Integer
  end
  
  module Array
    alias_method :pure_to_json, :to_json

    def to_json(state = nil, *)
      empty? ? '[]' : pure_to_json(state)
    end
  end
  
  module Hash
    alias_method :pure_to_json, :to_json

    def to_json(state = nil, *)
      empty? ? '{}' : sort.to_h.pure_to_json(state)
    end
  end
  
  remove_const :Integer
end

namespace :normalize do
  desc 'normalize herokuconnect.json'
  task :json do
    filename = 'herokuconnect.json'

    JSON.generator = JSON::Pure::Generator
    src = File.open(filename) { |io| JSON.load(io) }
    src.delete('connection')
    src['mappings'].sort_by! { |e| e['object_name'] }
    File.open(filename, 'w') { |io| io.write(JSON.pretty_generate(src)) }
  end

  desc 'normalize Schemafile'
  task :schemafile do
    filename = 'Schemafile'

    src = File.open(filename) { |io| io.read }
    File.open(filename, 'w') do |io|
      src.each_line.with_object([]) do |line, columns|
        if line.match(/\A\x20\x20/)
          next columns.push(line)
        end
        if line.match(/\Aend/)
          io.puts columns.sort_by { |e| e.split(/"/)[1] }
          columns.clear
        end
        io.puts line
      end
    end
  end
end