educoder/app/libs/util.rb

module Util
  module_function

  def days_between(time, other_time)
    raise ArgumentError if time.blank? || other_time.blank?
    Date.parse(time.to_s) - Date.parse(other_time.to_s)
  end

  def convert_base64_image(str, **opts)
    return if str.blank?

    Base64ImageConverter.new(**opts).convert(str)
  end

  def write_file(io, path)
    dir = File.dirname(path)
    FileUtils.mkdir_p(dir) unless File.directory?(dir)

    Rails.logger.info("### save file #{path}, size: #{io.size} ~")
    File.open(path, 'wb') do |file|
      if io.respond_to?(:read)
        io.rewind
        while buffer = io.read(8192)
          file.write(buffer)
        end
      else
        file.write(io)
      end
    end
  end

  def logger_error(exception)
    Rails.logger.error(exception.message)
    exception.backtrace.each { |message| Rails.logger.error(message) }
  end

  def map_or_pluck(relation, name)
    relation.is_a?(Array) || relation.loaded? ? relation.map(&name.to_sym) : relation.pluck(name)
  end

  def extract_content(str)
    return '' if str.blank?
    str.gsub(/<\/?.*?>/, '').gsub(/[\n\t\r]/, '').gsub(/&nbsp;/, '')
  end
end