class Phandoc

# File lib/phandoc.rb, line 8
def initialize(html)
  self.html = html
end

# File lib/phandoc.rb, line 12
  def execute(code, settings={})
    result = []
    
    html_file = Tempfile.new(['phantom_html', '.html'])
    js_file   = Tempfile.new(['phantom_js', '.js'])
    script_file = Tempfile.new(['phantom_script', '.js'])

    begin
      html_file.write(self.html)
      html_file.flush

      js_file.write(code)
      js_file.flush

      self.script = <<-JAVASCRIPT
        var fs = require('fs');
        var filename = '#{html_file.path}';
        var jsContent = fs.read('#{js_file.path}');
        var settings = #{settings.to_json};

        var page = require('webpage').create();
        
        #{settings_code(settings)}

        page.open(filename, function(status) {
          var output = page.evaluate(function(script) {
            return eval(script);
          }, jsContent);

          console.log(output);
          console.log(page.content.replace(/^/mg, '[:PHANDOC_SOURCE:] '));

          phantom.exit();
        });
      JAVASCRIPT
      script_file.write self.script
      script_file.flush

      html = []
      Phantomjs.run(script_file.path) do |line|
        if line.start_with?('[:PHANDOC_SOURCE:] ')
          html << line.sub(/(^\[:PHANDOC_SOURCE:\] |\n$)/, '')
        else
          result << line.sub(/\n$/, '')
        end
      end

      self.html = html.join("\n")
    ensure
      html_file.close
      html_file.unlink

      js_file.close
      js_file.unlink

      script_file.close
      script_file.unlink
    end

    result.join("\n")
  end

# File lib/phandoc.rb, line 76
def settings_code(settings={})
  settings.map do |k, v|
    value = v.is_a?(String) ? "'#{v}'" : v
    "page.settings.#{k} = #{value};"
  end.join("\n        ")
end