class RDoc::Generator::JsonIndex

def build_index
  reset @store.all_files.sort, @store.all_classes_and_modules.sort
  index_classes
  index_methods
  index_pages
  { :index => @index }
end

def class_dir
  @parent_generator.class_dir
end

def debug_msg *msg
  return unless $DEBUG_RDOC
  $stderr.puts(*msg)
end

def file_dir
  @parent_generator.file_dir
end

def generate
  debug_msg "Generating JSON index"
  debug_msg "  writing search index to %s" % SEARCH_INDEX_FILE
  data = build_index
  return if @options.dry_run
  out_dir = @base_dir + @options.op_dir
  index_file = out_dir + SEARCH_INDEX_FILE
  FileUtils.mkdir_p index_file.dirname, :verbose => $DEBUG_RDOC
  index_file.open 'w', 0644 do |io|
    io.set_encoding Encoding::UTF_8
    io.write 'var search_data = '
    JSON.dump data, io, 0
  end
  unless ENV['SOURCE_DATE_EPOCH'].nil?
    index_file.utime index_file.atime, Time.at(ENV['SOURCE_DATE_EPOCH'].to_i).gmtime
  end
  Dir.chdir @template_dir do
    Dir['**/*.js'].each do |source|
      dest = File.join out_dir, source
      FileUtils.install source, dest, :mode => 0644, :preserve => true, :verbose => $DEBUG_RDOC
    end
  end
end

def generate_gzipped
  return if @options.dry_run or not defined?(Zlib)
  debug_msg "Compressing generated JSON index"
  out_dir = @base_dir + @options.op_dir
  search_index_file = out_dir + SEARCH_INDEX_FILE
  outfile           = out_dir + "#{search_index_file}.gz"
  debug_msg "Reading the JSON index file from %s" % search_index_file
  search_index = search_index_file.read(mode: 'r:utf-8')
  debug_msg "Writing gzipped search index to %s" % outfile
  Zlib::GzipWriter.open(outfile) do |gz|
    gz.mtime = File.mtime(search_index_file)
    gz.orig_name = search_index_file.basename.to_s
    gz.write search_index
    gz.close
  end
  # GZip the rest of the js files
  Dir.chdir @template_dir do
    Dir['**/*.js'].each do |source|
      dest = out_dir + source
      outfile = out_dir + "#{dest}.gz"
      debug_msg "Reading the original js file from %s" % dest
      data = dest.read
      debug_msg "Writing gzipped file to %s" % outfile
      Zlib::GzipWriter.open(outfile) do |gz|
        gz.mtime = File.mtime(dest)
        gz.orig_name = dest.basename.to_s
        gz.write data
        gz.close
      end
    end
  end
end

def index_classes
  debug_msg "  generating class search index"
  documented = @classes.uniq.select do |klass|
    klass.document_self_or_methods
  end
  documented.each do |klass|
    debug_msg "    #{klass.full_name}"
    record = klass.search_record
    @index[:searchIndex]     << search_string(record.shift)
    @index[:longSearchIndex] << search_string(record.shift)
    @index[:info]            << record
  end
end

def index_methods
  debug_msg "  generating method search index"
  list = @classes.uniq.flat_map do |klass|
    klass.method_list
  end.sort_by do |method|
    [method.name, method.parent.full_name]
  end
  list.each do |method|
    debug_msg "    #{method.full_name}"
    record = method.search_record
    @index[:searchIndex]     << "#{search_string record.shift}()"
    @index[:longSearchIndex] << "#{search_string record.shift}()"
    @index[:info]            << record
  end
end

def index_pages
  debug_msg "  generating pages search index"
  pages = @files.select do |file|
    file.text?
  end
  pages.each do |page|
    debug_msg "    #{page.page_name}"
    record = page.search_record
    @index[:searchIndex]     << search_string(record.shift)
    @index[:longSearchIndex] << ''
    record.shift
    @index[:info]            << record
  end
end

def initialize parent_generator, options
  @parent_generator = parent_generator
  @store            = parent_generator.store
  @options          = options
  @template_dir = File.expand_path '../template/json_index', __FILE__
  @base_dir = @parent_generator.base_dir
  @classes = nil
  @files   = nil
  @index   = nil
end

def reset files, classes # :nodoc:
  @files   = files
  @classes = classes
  @index = {
    :searchIndex => [],
    :longSearchIndex => [],
    :info => []
  }
end

def search_string string
  string.downcase.gsub(/\s/, '')
end