collection_table.rb

require 'table_helper/html_element'
require 'table_helper/header'
require 'table_helper/body'
require 'table_helper/footer'

module PluginAWeek #:nodoc:
  module TableHelper
    # Represents a table that is displaying data for multiple objects within
    # a collection.
    class CollectionTable < HtmlElement
      def initialize(collection, options = {}, html_options = {}) #:nodoc:
        super(html_options)
        
        options.assert_valid_keys(
          :class,
          :footer,
          :header
        )
        @options = options.reverse_merge(
          :header => true,
          :footer => false
        )
        
        @html_options.reverse_merge!(
          :cellspacing => '0',
          :cellpadding => '0'
        )
        
        @header = Header.new(collection, options[:class])
        @body = Body.new(collection, @header)
        @footer = Footer.new(collection)
      end
      
      # Builds the table by rendering a header, body, and footer.
      def build(&block)
        @body.build # Build with the defaults
        
        elements = []
        elements << @header.builder if @options[:header]
        elements << @body
        elements << @footer if @options[:footer]
        
        yield *elements if block_given?
        
        @content = ''
        elements.each {|element| @content << element.html}
        @content
      end
      
      private
        def tag_name
          'table'
        end
        
        def content
          @content
        end
    end
  end
end