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# Redmine - project management software
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# Copyright (C) 2006-2016 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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include Redmine::SafeAttributes
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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_one :content_without_text, lambda {without_text.readonly}, :class_name => 'WikiContent', :foreign_key => 'page_id'
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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', :action => 'show', :project_id => o.wiki.project, :id => o.title}}
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acts_as_searchable :columns => ['title', "#{WikiContent.table_name}.text"],
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:scope => joins(:content, {:wiki => :project}),
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:preload => [:content, {:wiki => :project}],
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:permission => :view_wiki_pages,
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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 => /\A[^,\.\/\?\;\|\s]*\z/
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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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attr_protected :id
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validate :validate_parent_title
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before_destroy :delete_redirects
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before_save :handle_rename_or_move
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after_save :handle_children_move
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# eager load information about last updates, without loading text
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scope :with_updated_on, lambda { preload(:content_without_text) }
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# Wiki pages that are protected by default
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DEFAULT_PROTECTED_PAGES = %w(sidebar)
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safe_attributes 'parent_id', 'parent_title', 'title', 'redirect_existing_links', 'wiki_id',
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:if => lambda {|page, user| page.new_record? || user.allowed_to?(:rename_wiki_pages, page.project)}
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def initialize(attributes=nil, *args)
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super
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if new_record? && DEFAULT_PROTECTED_PAGES.include?(title.to_s.downcase)
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self.protected = true
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end
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end
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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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write_attribute(:title, value)
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end
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def safe_attributes=(attrs, user=User.current)
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return unless attrs.is_a?(Hash)
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attrs = attrs.deep_dup
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# Project and Tracker must be set before since new_statuses_allowed_to depends on it.
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if (w_id = attrs.delete('wiki_id')) && safe_attribute?('wiki_id')
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if (w = Wiki.find_by_id(w_id)) && w.project && user.allowed_to?(:rename_wiki_pages, w.project)
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self.wiki = w
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end
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end
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super attrs, user
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end
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# Manages redirects if page is renamed or moved
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def handle_rename_or_move
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if !new_record? && (title_changed? || wiki_id_changed?)
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# Update redirects that point to the old title
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WikiRedirect.where(:redirects_to => title_was, :redirects_to_wiki_id => wiki_id_was).each do |r|
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r.redirects_to = title
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r.redirects_to_wiki_id = wiki_id
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(r.title == r.redirects_to && r.wiki_id == r.redirects_to_wiki_id) ? r.destroy : r.save
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end
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# Remove redirects for the new title
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WikiRedirect.where(:wiki_id => wiki_id, :title => title).delete_all
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# Create a redirect to the new title
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unless redirect_existing_links == "0"
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WikiRedirect.create(
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:wiki_id => wiki_id_was, :title => title_was,
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:redirects_to_wiki_id => wiki_id, :redirects_to => title
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)
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end
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end
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if !new_record? && wiki_id_changed? && parent.present?
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unless parent.wiki_id == wiki_id
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self.parent_id = nil
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end
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end
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end
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private :handle_rename_or_move
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# Moves child pages if page was moved
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def handle_children_move
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if !new_record? && wiki_id_changed?
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children.each do |child|
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child.wiki_id = wiki_id
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child.redirect_existing_links = redirect_existing_links
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unless child.save
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WikiPage.where(:id => child.id).update_all :parent_id => nil
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end
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end
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end
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end
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private :handle_children_move
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# Deletes redirects to this page
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def delete_redirects
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WikiRedirect.where(:redirects_to_wiki_id => wiki_id, :redirects_to => title).delete_all
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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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if content
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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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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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content_to = content.versions.find_by_version(version_to)
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content_from = version_from ? content.versions.find_by_version(version_from.to_i) : content_to.try(:previous)
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return nil unless content_to && content_from
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if content_from.version > content_to.version
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content_to, content_from = content_from, content_to
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end
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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.try(: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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def updated_on
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content_attribute(:updated_on)
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end
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def version
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content_attribute(:version)
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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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# Saves the page and its content if text was changed
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# Return true if the page was saved
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def save_with_content(content)
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ret = nil
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transaction do
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ret = save
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if content.text_changed?
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begin
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self.content = content
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ret = ret && content.changed?
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rescue ActiveRecord::RecordNotSaved
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ret = false
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end
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end
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raise ActiveRecord::Rollback unless ret
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end
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ret
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end
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protected
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def validate_parent_title
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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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if parent_id_changed? && parent && (parent.wiki_id != wiki_id)
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errors.add(:parent_title, :not_same_project)
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end
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end
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private
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def content_attribute(name)
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(association(:content).loaded? ? content : content_without_text).try(name)
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end
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end
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class WikiDiff < Redmine::Helpers::Diff
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attr_reader :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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super(content_to.text, content_from.text)
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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|
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line[0] ||= current.version
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# if the last known version is > 1 (eg. history was cleared), we don't know the author
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line[1] ||= current.author if current.version == 1
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}
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end
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end
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