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# frozen_string_literal: false
# Redmine - project management software
# Copyright (C) 2006-2017 Jean-Philippe Lang
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
require 'zlib'
class WikiContentVersion < ActiveRecord::Base
belongs_to :page, :class_name => 'WikiPage'
belongs_to :author, :class_name => 'User'
acts_as_event :title => Proc.new {|o| "#{l(:label_wiki_edit)}: #{o.page.title} (##{o.version})"},
:description => :comments,
:datetime => :updated_on,
:type => 'wiki-page',
:group => :page,
:url => Proc.new {|o| {:controller => 'wiki', :action => 'show', :project_id => o.page.wiki.project, :id => o.page.title, :version => o.version}}
acts_as_activity_provider :type => 'wiki_edits',
:timestamp => "#{table_name}.updated_on",
:author_key => "#{table_name}.author_id",
:permission => :view_wiki_edits,
:scope => select("#{table_name}.updated_on, #{table_name}.comments, " +
"#{table_name}.version, #{WikiPage.table_name}.title, " +
"#{table_name}.page_id, #{table_name}.author_id, " +
"#{table_name}.id").
joins("LEFT JOIN #{WikiPage.table_name} ON #{WikiPage.table_name}.id = #{table_name}.page_id " +
"LEFT JOIN #{Wiki.table_name} ON #{Wiki.table_name}.id = #{WikiPage.table_name}.wiki_id " +
"LEFT JOIN #{Project.table_name} ON #{Project.table_name}.id = #{Wiki.table_name}.project_id")
after_destroy :page_update_after_destroy
def text=(plain)
case Setting.wiki_compression
when 'gzip'
begin
self.data = Zlib::Deflate.deflate(plain, Zlib::BEST_COMPRESSION)
self.compression = 'gzip'
rescue
self.data = plain
self.compression = ''
end
else
self.data = plain
self.compression = ''
end
plain
end
def text
@text ||= begin
str = case compression
when 'gzip'
Zlib::Inflate.inflate(data)
else
# uncompressed data
data
end
str.force_encoding("UTF-8")
str
end
end
def project
page.project
end
def attachments
page.nil? ? [] : page.attachments
end
# Return true if the content is the current page content
def current_version?
page.content.version == self.version
end
# Returns the previous version or nil
def previous
@previous ||= WikiContentVersion.
reorder(version: :desc).
includes(:author).
where("wiki_content_id = ? AND version < ?", wiki_content_id, version).first
end
# Returns the next version or nil
def next
@next ||= WikiContentVersion.
reorder(version: :asc).
includes(:author).
where("wiki_content_id = ? AND version > ?", wiki_content_id, version).first
end
private
# Updates page's content if the latest version is removed
# or destroys the page if it was the only version
def page_update_after_destroy
latest = page.content.versions.reorder(version: :desc).first
if latest && page.content.version != latest.version
raise ActiveRecord::Rollback unless page.content.revert_to!(latest)
elsif latest.nil?
raise ActiveRecord::Rollback unless page.destroy
end
end
end
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