module RdocGenerate

# File lib/rdoc_generate.rb, line 25
def build_argv
  %w[bundle exec rake doc]
end

# File lib/rdoc_generate.rb, line 29
def default_run
  lambda do |argv, root:|
    Dir.chdir(root) { Open3.capture3(*argv) }
  end
end

# File lib/rdoc_generate.rb, line 35
def generate(root:, run: default_run)
  stdout, stderr, status = run.call(build_argv, root: root)
  index_rel = INDEX_FILE
  index_abs = File.join(root, index_rel)

  unless status.success?
    return {
      status: :error,
      stderr: [stderr, stdout].join("\n").strip
    }
  end

  unless File.file?(index_abs)
    return {
      status: :error,
      stderr: "rake doc finished but #{index_rel} was not created"
    }
  end

  { status: :ok, index_path: index_rel }
end

# File lib/rdoc_generate.rb, line 57
def handle(args, root:, admin_allowed:, run: default_run)
  return [:error, RdocReport.denial] unless admin_allowed

  case parse_action(args)
  when :generate
    [:async, RdocReport.started, -> { generate(root: root, run: run) }]
  when :usage
    [:error, RdocReport.usage]
  end
end

# File lib/rdoc_generate.rb, line 17
def parse_action(args)
  token = args.to_s.strip.downcase
  return :generate if token.empty?
  return :generate if token == "update"

  :usage
end