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# Redmine - project management software
# Copyright (C) 2006-2009 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 'diff'
require 'enumerator'
class WikiPage < ActiveRecord::Base
belongs_to :wiki
has_one :content, :class_name => 'WikiContent', :foreign_key => 'page_id', :dependent => :destroy
acts_as_attachable :delete_permission => :delete_wiki_pages_attachments
acts_as_tree :dependent => :nullify, :order => 'title'
acts_as_watchable
acts_as_event :title => Proc.new {|o| "#{l(:label_wiki)}: #{o.title}"},
:description => :text,
:datetime => :created_on,
:url => Proc.new {|o| {:controller => 'wiki', :id => o.wiki.project, :page => o.title}}
acts_as_searchable :columns => ['title', 'text'],
:include => [{:wiki => :project}, :content],
:project_key => "#{Wiki.table_name}.project_id"
attr_accessor :redirect_existing_links
validates_presence_of :title
validates_format_of :title, :with => /^[^,\.\/\?\;\|\s]*$/
validates_uniqueness_of :title, :scope => :wiki_id, :case_sensitive => false
validates_associated :content
# Wiki pages that are protected by default
DEFAULT_PROTECTED_PAGES = %w(sidebar)
def after_initialize
if new_record? && DEFAULT_PROTECTED_PAGES.include?(title.to_s.downcase)
self.protected = true
end
end
def visible?(user=User.current)
!user.nil? && user.allowed_to?(:view_wiki_pages, project)
end
def title=(value)
value = Wiki.titleize(value)
@previous_title = read_attribute(:title) if @previous_title.blank?
write_attribute(:title, value)
end
def before_save
self.title = Wiki.titleize(title)
# Manage redirects if the title has changed
if !@previous_title.blank? && (@previous_title != title) && !new_record?
# Update redirects that point to the old title
wiki.redirects.find_all_by_redirects_to(@previous_title).each do |r|
r.redirects_to = title
r.title == r.redirects_to ? r.destroy : r.save
end
# Remove redirects for the new title
wiki.redirects.find_all_by_title(title).each(&:destroy)
# Create a redirect to the new title
wiki.redirects << WikiRedirect.new(:title => @previous_title, :redirects_to => title) unless redirect_existing_links == "0"
@previous_title = nil
end
end
def before_destroy
# Remove redirects to this page
wiki.redirects.find_all_by_redirects_to(title).each(&:destroy)
end
def pretty_title
WikiPage.pretty_title(title)
end
def content_for_version(version=nil)
result = content.versions.find_by_version(version.to_i) if version
result ||= content
result
end
def diff(version_to=nil, version_from=nil)
version_to = version_to ? version_to.to_i : self.content.version
version_from = version_from ? version_from.to_i : version_to - 1
version_to, version_from = version_from, version_to unless version_from < version_to
content_to = content.versions.find_by_version(version_to)
content_from = content.versions.find_by_version(version_from)
(content_to && content_from) ? WikiDiff.new(content_to, content_from) : nil
end
def annotate(version=nil)
version = version ? version.to_i : self.content.version
c = content.versions.find_by_version(version)
c ? WikiAnnotate.new(c) : nil
end
def self.pretty_title(str)
(str && str.is_a?(String)) ? str.tr('_', ' ') : str
end
def project
wiki.project
end
def text
content.text if content
end
# Returns true if usr is allowed to edit the page, otherwise false
def editable_by?(usr)
!protected? || usr.allowed_to?(:protect_wiki_pages, wiki.project)
end
def attachments_deletable?(usr=User.current)
editable_by?(usr) && super(usr)
end
def parent_title
@parent_title || (self.parent && self.parent.pretty_title)
end
def parent_title=(t)
@parent_title = t
parent_page = t.blank? ? nil : self.wiki.find_page(t)
self.parent = parent_page
end
protected
def validate
errors.add(:parent_title, :invalid) if !@parent_title.blank? && parent.nil?
errors.add(:parent_title, :circular_dependency) if parent && (parent == self || parent.ancestors.include?(self))
errors.add(:parent_title, :not_same_project) if parent && (parent.wiki_id != wiki_id)
end
end
class WikiDiff
attr_reader :diff, :words, :content_to, :content_from
def initialize(content_to, content_from)
@content_to = content_to
@content_from = content_from
@words = content_to.text.split(/(\s+)/)
@words = @words.select {|word| word != ' '}
words_from = content_from.text.split(/(\s+)/)
words_from = words_from.select {|word| word != ' '}
@diff = words_from.diff @words
end
end
class WikiAnnotate
attr_reader :lines, :content
def initialize(content)
@content = content
current = content
current_lines = current.text.split(/\r?\n/)
@lines = current_lines.collect {|t| [nil, nil, t]}
positions = []
current_lines.size.times {|i| positions << i}
while (current.previous)
d = current.previous.text.split(/\r?\n/).diff(current.text.split(/\r?\n/)).diffs.flatten
d.each_slice(3) do |s|
sign, line = s[0], s[1]
if sign == '+' && positions[line] && positions[line] != -1
if @lines[positions[line]][0].nil?
@lines[positions[line]][0] = current.version
@lines[positions[line]][1] = current.author
end
end
end
d.each_slice(3) do |s|
sign, line = s[0], s[1]
if sign == '-'
positions.insert(line, -1)
else
positions[line] = nil
end
end
positions.compact!
# Stop if every line is annotated
break unless @lines.detect { |line| line[0].nil? }
current = current.previous
end
@lines.each { |line| line[0] ||= current.version }
end
end
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