require 'diff' require 'wiki_content' require 'chunks/wiki' require 'date' require 'author' require 'page' class Revision attr_accessor :page, :number, :content, :created_at, :author def initialize(page, number, content, created_at, author) @page, @number, @created_at, @author = page, number, created_at, author self.content = content end def created_on Date.new(@created_at.year, @created_at.mon, @created_at.day) end def pretty_created_at # Must use DateTime because Time doesn't support %e on at least some platforms DateTime.new( @created_at.year, @created_at.mon, @created_at.day, @created_at.hour, @created_at.min ).strftime "%B %e, %Y %H:%M" end def next_revision page.revisions[number + 1] end def previous_revision number - 1 >= 0 && page.revisions[number - 1] end # Returns an array of all the WikiWords present in the content of this revision. def wiki_words unless @wiki_words_cache wiki_chunks = display_content.find_chunks(WikiChunk::WikiLink) @wiki_words_cache = wiki_chunks.map { |c| ( c.escaped_text ? nil : c.page_name ) }.compact.uniq end @wiki_words_cache end # Returns an array of all the WikiWords present in the content of this revision. # that already exists as a page in the web. def existing_pages wiki_words.select { |wiki_word| page.web.pages[wiki_word] } end # Returns an array of all the WikiWords present in the content of this revision # that *doesn't* already exists as a page in the web. def unexisting_pages wiki_words - existing_pages end # Explicit check for new type of display cache with find_chunks method. # Ensures new version works with older snapshots. def display_content unless @display_cache && @display_cache.respond_to?(:find_chunks) @display_cache = WikiContent.new(self) end @display_cache end def display_diff previous_revision ? HTMLDiff.diff(previous_revision.display_content, display_content) : display_content end def clear_display_cache @display_cache = @published_cache = @wiki_words_cache = nil end def display_published @published_cache = WikiContent.new(self, {:mode => :publish}) if @published_cache.nil? @published_cache end def display_content_for_export WikiContent.new(self, {:mode => :export} ) end end