ruby_script_server/opal_adapter.rb at master · jeanlazarou/ruby_script_server · GitHub

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require 'opal'

class OpalAdapter

  def initialize context
    @context = context
    @parser = Opal::Parser.new
  end

  def compile ruby_file

    if @context.must_compile?(ruby_file)

      parse_and_write ruby_file

    else

      compile_known_dependencies ruby_file

    end

  end

  def parse_and_write ruby_file

    source_file = @context.source_path(ruby_file)
    compiled_file = @context.compile_path(ruby_file)

    open(compiled_file, "w") do |stream|

      stream.puts @parser.parse(File.read(source_file))

    end

    @context.compiled_files << compiled_file

    required_files = @parser.requires

    compile_dependencies required_files

    save_dependencies ruby_file, required_files

  end

  def compile_dependencies required_files

    required_files.each do |name|

      source = "#{name}.rb"

      self.compile source

    end

  end

  def save_dependencies ruby_script, required_files

    open(@context.dependency_path(ruby_script), 'w') do |out|

      required_files.each do |name|
        out.puts name
      end

    end

  end

  def compile_known_dependencies ruby_script

    required_files = load_dependencies(ruby_script)

    return if required_files.empty?

    compile_dependencies required_files

  end

  def load_dependencies ruby_script

    dep_file = @context.dependency_path(ruby_script)

    return [] unless File.exist?(dep_file)

    open(dep_file).readlines.map {|file| file.chomp }

  end

end