require 'sanitize'

module ProtocolsIoTableHelper

  def protocolsio_string_to_table_element(description_string)
    string_without_tables = string_html_table_remove(description_string)
    table_regex = %r{<table\b[^>]*>(.*?)<\/table>}m
    tr_regex = %r{<tr\b[^>]*>(.*?)<\/tr>}m
    td_regex = %r{<td\b[^>]*>(.*?)<\/td>}m
    tables = {}
    table_strings = description_string.scan(table_regex)
    table_strings.each_with_index do |table, table_counter|
      tables[table_counter.to_s] = {}
      tr_strings = table[0].scan(tr_regex)
      contents = {}
      contents['data'] = []
      tr_strings.each_with_index do |tr, tr_counter|
        td_strings = tr[0].scan(td_regex)
        contents['data'][tr_counter] = []
        td_strings.each do |td|
          td_stripped = ActionController::Base.helpers.strip_tags(td[0])
          contents['data'][tr_counter].push(td_stripped)
        end
      end
      tables[table_counter.to_s]['contents'] = Base64.encode64(
        contents.to_s.sub('=>', ':')
      )
      tables[table_counter.to_s]['name'] = nil
    end
    # return string_without_tables, tables
    return tables, string_without_tables
  end

  def string_html_table_remove(description_string)
    description_string.remove!("\n", "\t", "\r", "\f")
    table_whole_regex = %r{(<table\b[^>]*>.*?<\/table>)}m
    table_pattern_array = description_string.scan(table_whole_regex)
    string_without_tables = description_string
    table_pattern_array.each do |table_pattern|
      string_without_tables = string_without_tables.gsub(
        table_pattern[0],
        t('protocols.protocols_io_import.comp_append.table_moved').html_safe
      )
    end
    string_without_tables
  end
end