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# redMine - project management software
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# Copyright (C) 2006-2007 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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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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has_many :attachments, :as => :container, :dependent => :destroy
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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 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 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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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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