module Asposeslidesjava
  module ImportHtml
    def initialize()
        data_dir = File.dirname(File.dirname(File.dirname(File.dirname(__FILE__)))) + '/data/Text/'
                
        # Create an instance of Presentation class
        pres = Rjb::import('com.aspose.slides.Presentation').new

        # Get the first slide
        slide = pres.getSlides().get_Item(0)

        # Adding the AutoShape to accomodate the HTML content
        ashape = slide.getShapes().addAutoShape(Rjb::import('com.aspose.slides.ShapeType').Rectangle, 10, 10, pres.getSlideSize().getSize().getWidth(), pres.getSlideSize().getSize().getHeight())
        ashape.getFillFormat().setFillType(Rjb::import('com.aspose.slides.FillType').NoFill)

        # Adding text frame to the shape
        ashape.addTextFrame("")

        # Clearing all paragraphs in added text frame
        ashape.getTextFrame().getParagraphs().clear()

        # Loading the HTML file using InputStream
        input_stream = Rjb::import('java.io.FileInputStream').new(data_dir + "import.html")
        reader = Rjb::import('java.io.InputStreamReader').new(input_stream)

        data = reader.read()
        content = read_file(data_dir + "import.html")

        # Adding text from HTML stream reader in text frame
        ashape.getTextFrame().getParagraphs().addFromHtml(content)

        # Saving Presentation
        pres.save(data_dir + "output.pptx", Rjb::import('com.aspose.slides.SaveFormat').Pptx)
        
        puts "Done with html import, please check the output file."
    end

    def read_file(file_name)
        file = Rjb::import('java.io.File').new(file_name)                                                                      
        contents = Rjb::import('java.lang.StringBuilder').new                                                                                                                                                                                                                                                                                                                          
        reader = Rjb::import('java.io.BufferedReader').new(Rjb::import('java.io.FileReader').new(file))                                                                              
                                                                                                           
        # repeat until all lines is read                                                                  
        while (text = reader.readLine()) != nil                                                     
            contents.append(text).append("\n") 
        end   

        contents.toString()         
    end    
  end
end