#!/usr/bin/env ruby

require 'poppler'

class PDFParser
  def initialize(params = nil)
    @loaded = false
    if (params != nil) then
      @file = params[:file] || nil
      if (@file != nil) then
        loadFile(@file)
      end
    else
      @file = nil
    end
  end

  def loadFile(fileName)
    @loaded = false
    if (!File.exists?(fileName)) then
      raise 'file not found ' + fileName
    end
    @file = fileName
    @poppler = Poppler::Document.new(@file)
    pageCount = 0;
    @poppler.each do |page|
      pageCount+=1
    end
    @pageCount = pageCount
    @loaded = true
  end

  def DumpLinks
    if (!@loaded) then
      loadFile(@file)
    end
    @poppler.each do |page|
      links = page.link_mapping
      links.each do |link|
        action = link.action
        if(action.is_a?(Poppler::ActionGotoDest))
          puts "Destination: page_num: %d, top: %f, left: %f, right: %f, zoom: %f, dest: %s" %
            [action.dest.page_num, action.dest.top, action.dest.left, action.dest.right, action.dest.zoom, action.dest.named_dest]
          namedDest = action.dest.named_dest
          puts namedDest
          if (namedDest != nil) then
            dest = @poppler.find_dest(namedDest)
            puts dest
          end
        end
      end
    end
  end
end