class Page < ActiveRecord::Base belongs_to :web has_many :revisions, :order => 'id' has_many :wiki_references, :order => 'referenced_page_name' has_one :current_revision, :class_name => 'Revision', :order => 'id DESC' def revise(content, time, author, renderer) revisions_size = new_record? ? 0 : revisions.size if (revisions_size > 0) and content == current_revision.content raise Instiki::ValidationError.new( "You have tried to save page '#{name}' without changing its content") end author = Author.new(author.to_s) unless author.is_a?(Author) # Try to render content to make sure that markup engine can take it, renderer.revision = Revision.new( :page => self, :content => content, :author => author, :revised_at => time) renderer.display_content # A user may change a page, look at it and make some more changes - several times. # Not to record every such iteration as a new revision, if the previous revision was done # by the same author, not more than 30 minutes ago, then update the last revision instead of # creating a new one if (revisions_size > 0) && continous_revision?(time, author) current_revision.update_attributes(:content => content, :revised_at => time) else Revision.create(:page => self, :content => content, :author => author, :revised_at => time) end save self end def rollback(revision_number, time, author_ip, renderer) roll_back_revision = self.revisions[revision_number] if roll_back_revision.nil? raise Instiki::ValidationError.new("Revision #{revision_number} not found") end author = Author.new(roll_back_revision.author.name, author_ip) revise(roll_back_revision.content, time, author, renderer) end def revisions? revisions.size > 1 end def previous_revision(revision) revision_index = revisions.each_with_index do |rev, index| if rev.id == revision.id break index else nil end end if revision_index.nil? or revision_index == 0 nil else revisions[revision_index - 1] end end def authors revisions.collect { |rev| rev.author } end def references web.select.pages_that_reference(name) end def linked_from web.select.pages_that_link_to(name) end def included_from web.select.pages_that_include(name) end # Returns the original wiki-word name as separate words, so "MyPage" becomes "My Page". def plain_name web.brackets_only? ? name : WikiWords.separate(name) end LOCKING_PERIOD = 30.minutes def lock(time, locked_by) update_attributes(:locked_at => time, :locked_by => locked_by) end def lock_duration(time) ((time - locked_at) / 60).to_i unless locked_at.nil? end def unlock update_attribute(:locked_at, nil) end def locked?(comparison_time) locked_at + LOCKING_PERIOD > comparison_time unless locked_at.nil? end private def continous_revision?(time, author) (current_revision.author == author) && (revised_at + 30.minutes > time) end # Forward method calls to the current revision, so the page responds to all revision calls def method_missing(method_id, *args, &block) method_name = method_id.to_s # Perform a hand-off to AR::Base#method_missing if @attributes.include?(method_name) or md = /(=|\?|_before_type_cast)$/.match(method_name) super(method_id, *args, &block) else current_revision.send(method_id) end end end