require_dependency "discourse_diff" class PostRevision < ActiveRecord::Base belongs_to :post belongs_to :user serialize :modifications, Hash def body_changes cooked_diff = DiscourseDiff.new(previous("cooked"), current("cooked")) raw_diff = DiscourseDiff.new(previous("raw"), current("raw")) { inline: cooked_diff.inline_html, side_by_side: cooked_diff.side_by_side_html, side_by_side_markdown: raw_diff.side_by_side_markdown } end def category_changes prev = previous("category_id") cur = current("category_id") return if prev == cur { previous_category_id: prev, current_category_id: cur, } end def title_changes prev = "
#{CGI::escapeHTML(previous("title"))}
" cur = "
#{CGI::escapeHTML(current("title"))}
" return if prev == cur diff = DiscourseDiff.new(prev, cur) { inline: diff.inline_html, side_by_side: diff.side_by_side_html } end def previous(field) lookup_with_fallback(field, 0) end def current(field) lookup_with_fallback(field, 1) end def previous_revisions @previous_revs ||= PostRevision.where("post_id = ? AND number < ?", post_id, number) .order("number desc") .to_a end def has_topic_data? post && post.post_number == 1 end def lookup_with_fallback(field, index) unless val = lookup(field, index) previous_revisions.each do |v| break if val = v.lookup(field, 1) end end unless val if ["cooked","raw"].include?(field) val = post.send(field) else val = post.topic.send(field) end end val end def lookup(field, index) if mod = modifications[field] mod[index] end end end # == Schema Information # # Table name: post_revisions # # id :integer not null, primary key # user_id :integer # post_id :integer # modifications :text # number :integer # created_at :datetime # updated_at :datetime # # Indexes # # index_post_revisions_on_post_id (post_id) # index_post_revisions_on_post_id_and_number (post_id,number) #