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# Redmine - project management software
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# Copyright (C) 2006-2009 Jean-Philippe Lang
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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require 'diff'
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require 'enumerator'
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class WikiPage < ActiveRecord::Base
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belongs_to :wiki
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has_one :content, :class_name => 'WikiContent', :foreign_key => 'page_id', :dependent => :destroy
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acts_as_attachable :delete_permission => :delete_wiki_pages_attachments
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acts_as_tree :dependent => :nullify, :order => 'title'
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acts_as_watchable
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acts_as_event :title => Proc.new {|o| "#{l(:label_wiki)}: #{o.title}"},
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:description => :text,
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:datetime => :created_on,
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:url => Proc.new {|o| {:controller => 'wiki', :id => o.wiki.project_id, :page => o.title}}
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acts_as_searchable :columns => ['title', 'text'],
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:include => [{:wiki => :project}, :content],
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:project_key => "#{Wiki.table_name}.project_id"
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attr_accessor :redirect_existing_links
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validates_presence_of :title
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validates_format_of :title, :with => /^[^,\.\/\?\;\|\s]*$/
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validates_uniqueness_of :title, :scope => :wiki_id, :case_sensitive => false
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validates_associated :content
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def visible?(user=User.current)
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!user.nil? && user.allowed_to?(:view_wiki_pages, project)
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end
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def title=(value)
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value = Wiki.titleize(value)
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@previous_title = read_attribute(:title) if @previous_title.blank?
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write_attribute(:title, value)
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end
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def before_save
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self.title = Wiki.titleize(title)
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# Manage redirects if the title has changed
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if !@previous_title.blank? && (@previous_title != title) && !new_record?
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# Update redirects that point to the old title
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wiki.redirects.find_all_by_redirects_to(@previous_title).each do |r|
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r.redirects_to = title
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r.title == r.redirects_to ? r.destroy : r.save
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end
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# Remove redirects for the new title
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wiki.redirects.find_all_by_title(title).each(&:destroy)
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# Create a redirect to the new title
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wiki.redirects << WikiRedirect.new(:title => @previous_title, :redirects_to => title) unless redirect_existing_links == "0"
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@previous_title = nil
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end
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end
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def before_destroy
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# Remove redirects to this page
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wiki.redirects.find_all_by_redirects_to(title).each(&:destroy)
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end
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def pretty_title
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WikiPage.pretty_title(title)
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end
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def content_for_version(version=nil)
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result = content.versions.find_by_version(version.to_i) if version
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result ||= content
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result
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end
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def diff(version_to=nil, version_from=nil)
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version_to = version_to ? version_to.to_i : self.content.version
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version_from = version_from ? version_from.to_i : version_to - 1
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version_to, version_from = version_from, version_to unless version_from < version_to
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content_to = content.versions.find_by_version(version_to)
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content_from = content.versions.find_by_version(version_from)
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(content_to && content_from) ? WikiDiff.new(content_to, content_from) : nil
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end
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def annotate(version=nil)
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version = version ? version.to_i : self.content.version
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c = content.versions.find_by_version(version)
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c ? WikiAnnotate.new(c) : nil
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end
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def self.pretty_title(str)
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(str && str.is_a?(String)) ? str.tr('_', ' ') : str
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end
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def project
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wiki.project
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end
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def text
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content.text if content
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end
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# Returns true if usr is allowed to edit the page, otherwise false
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def editable_by?(usr)
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!protected? || usr.allowed_to?(:protect_wiki_pages, wiki.project)
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end
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def attachments_deletable?(usr=User.current)
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editable_by?(usr) && super(usr)
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end
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def parent_title
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@parent_title || (self.parent && self.parent.pretty_title)
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end
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def parent_title=(t)
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@parent_title = t
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parent_page = t.blank? ? nil : self.wiki.find_page(t)
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self.parent = parent_page
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end
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protected
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def validate
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errors.add(:parent_title, :invalid) if !@parent_title.blank? && parent.nil?
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errors.add(:parent_title, :circular_dependency) if parent && (parent == self || parent.ancestors.include?(self))
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errors.add(:parent_title, :not_same_project) if parent && (parent.wiki_id != wiki_id)
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end
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end
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class WikiDiff
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attr_reader :diff, :words, :content_to, :content_from
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def initialize(content_to, content_from)
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@content_to = content_to
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@content_from = content_from
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@words = content_to.text.split(/(\s+)/)
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@words = @words.select {|word| word != ' '}
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words_from = content_from.text.split(/(\s+)/)
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words_from = words_from.select {|word| word != ' '}
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@diff = words_from.diff @words
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end
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end
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class WikiAnnotate
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attr_reader :lines, :content
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def initialize(content)
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@content = content
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current = content
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current_lines = current.text.split(/\r?\n/)
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@lines = current_lines.collect {|t| [nil, nil, t]}
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positions = []
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current_lines.size.times {|i| positions << i}
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while (current.previous)
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d = current.previous.text.split(/\r?\n/).diff(current.text.split(/\r?\n/)).diffs.flatten
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d.each_slice(3) do |s|
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sign, line = s[0], s[1]
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if sign == '+' && positions[line] && positions[line] != -1
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if @lines[positions[line]][0].nil?
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@lines[positions[line]][0] = current.version
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@lines[positions[line]][1] = current.author
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end
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end
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end
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d.each_slice(3) do |s|
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sign, line = s[0], s[1]
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if sign == '-'
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positions.insert(line, -1)
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else
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positions[line] = nil
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end
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end
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positions.compact!
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# Stop if every line is annotated
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break unless @lines.detect { |line| line[0].nil? }
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current = current.previous
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end
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@lines.each { |line| line[0] ||= current.version }
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end
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end
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