class DataBandRenderer

# File lib/data_band.rb, line 4
def initialize(data, pdf, sql_conn, replacements, data_sources, y_off)
  @data = data
  @pdf = pdf
  @sql_conn = sql_conn
  @data_sources = data_sources
  @replacements = replacements
  @y_off = y_off

  @row_data = prepare_dataset
end

# File lib/data_band.rb, line 34
def draw_row(row)
  last_y_off = @y_off

  @data.xpath("Components/*[contains(.,'Text')]").each do |node|
    next if node.name == "Name"

    if node.name.start_with? "Text"
      x, y, w, h = Stylist.get_dimensions(node, @y_off)

      # Text
      text = node.xpath("Text").text

      # SQL replacements
      if text.include?("{")
        text.gsub!(/{.*}/) do |m|
          index = m.split(".")[1].sub("}","")
          text = row[index]
          text = Util.number_format(text) if Util.is_number?(text)
          text
        end
      end

      # Do painting
      @pdf.fill_color Stylist.get_text_colour(node)
      @pdf.text_box text,
                :at     => [x + 1, y - 1],
                :height => h,
                :width  => w,
                :align  => Stylist.get_horizontal_align(node),
                :valign => Stylist.get_vertical_align(node),
                :size   => Stylist.get_font_size(node),
                :font   => Stylist.get_font_face(node),
                :style  => Stylist.get_font_style(node)

      last_y_off = (720 + h - y) if (720 + h - y) > @y_off
    end
  end

  @y_off = last_y_off
end

# File lib/data_band.rb, line 23
def prepare_dataset
  data_source = @data.xpath("DataSourceName").text
  sql = @data_sources[data_source]["sql"]
  
  @replacements.each do |key, val|
    sql.sub!("{#{key}}", val)
  end
  
  return @sql_conn.query sql
end

# File lib/data_band.rb, line 15
def render
  @row_data.each do |row|
    draw_row(row)
  end

  return @y_off
end