Chris@0: # redMine - project management software
Chris@0: # Copyright (C) 2006-2007  Jean-Philippe Lang
Chris@0: #
Chris@0: # This program is free software; you can redistribute it and/or
Chris@0: # modify it under the terms of the GNU General Public License
Chris@0: # as published by the Free Software Foundation; either version 2
Chris@0: # of the License, or (at your option) any later version.
Chris@0: # 
Chris@0: # This program is distributed in the hope that it will be useful,
Chris@0: # but WITHOUT ANY WARRANTY; without even the implied warranty of
Chris@0: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
Chris@0: # GNU General Public License for more details.
Chris@0: # 
Chris@0: # You should have received a copy of the GNU General Public License
Chris@0: # along with this program; if not, write to the Free Software
Chris@0: # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
Chris@0: 
Chris@0: require 'diff'
Chris@0: 
chris@37: # The WikiController follows the Rails REST controller pattern but with
chris@37: # a few differences
chris@37: #
chris@37: # * index - shows a list of WikiPages grouped by page or date
chris@37: # * new - not used
chris@37: # * create - not used
chris@37: # * show - will also show the form for creating a new wiki page
chris@37: # * edit - used to edit an existing or new page
chris@37: # * update - used to save a wiki page update to the database, including new pages
chris@37: # * destroy - normal
chris@37: #
chris@37: # Other member and collection methods are also used
chris@37: #
chris@37: # TODO: still being worked on
Chris@0: class WikiController < ApplicationController
Chris@0:   default_search_scope :wiki_pages
Chris@0:   before_filter :find_wiki, :authorize
Chris@0:   before_filter :find_existing_page, :only => [:rename, :protect, :history, :diff, :annotate, :add_attachment, :destroy]
Chris@0:   
chris@37:   verify :method => :post, :only => [:protect], :redirect_to => { :action => :show }
Chris@0: 
Chris@0:   helper :attachments
Chris@0:   include AttachmentsHelper   
Chris@0:   helper :watchers
chris@37: 
chris@37:   # List of pages, sorted alphabetically and by parent (hierarchy)
chris@37:   def index
chris@37:     load_pages_grouped_by_date_without_content
chris@37:   end
chris@37: 
Chris@0:   # display a page (in editing mode if it doesn't exist)
chris@37:   def show
chris@37:     page_title = params[:id]
Chris@0:     @page = @wiki.find_or_new_page(page_title)
Chris@0:     if @page.new_record?
Chris@0:       if User.current.allowed_to?(:edit_wiki_pages, @project) && editable?
Chris@0:         edit
Chris@0:         render :action => 'edit'
Chris@0:       else
Chris@0:         render_404
Chris@0:       end
Chris@0:       return
Chris@0:     end
Chris@0:     if params[:version] && !User.current.allowed_to?(:view_wiki_edits, @project)
Chris@0:       # Redirects user to the current version if he's not allowed to view previous versions
Chris@0:       redirect_to :version => nil
Chris@0:       return
Chris@0:     end
Chris@0:     @content = @page.content_for_version(params[:version])
Chris@0:     if User.current.allowed_to?(:export_wiki_pages, @project)
Chris@0:       if params[:format] == 'html'
Chris@0:         export = render_to_string :action => 'export', :layout => false
Chris@0:         send_data(export, :type => 'text/html', :filename => "#{@page.title}.html")
Chris@0:         return
Chris@0:       elsif params[:format] == 'txt'
Chris@0:         send_data(@content.text, :type => 'text/plain', :filename => "#{@page.title}.txt")
Chris@0:         return
Chris@0:       end
Chris@0:     end
Chris@0:     @editable = editable?
Chris@0:     render :action => 'show'
Chris@0:   end
Chris@0:   
Chris@0:   # edit an existing page or a new one
Chris@0:   def edit
chris@37:     @page = @wiki.find_or_new_page(params[:id])    
Chris@0:     return render_403 unless editable?
Chris@0:     @page.content = WikiContent.new(:page => @page) if @page.new_record?
Chris@0:     
Chris@0:     @content = @page.content_for_version(params[:version])
Chris@0:     @content.text = initial_page_content(@page) if @content.text.blank?
Chris@0:     # don't keep previous comment
Chris@0:     @content.comments = nil
chris@37: 
chris@37:     # To prevent StaleObjectError exception when reverting to a previous version
chris@37:     @content.version = @page.content.version
Chris@0:   rescue ActiveRecord::StaleObjectError
Chris@0:     # Optimistic locking exception
Chris@0:     flash[:error] = l(:notice_locking_conflict)
Chris@0:   end
chris@37: 
chris@37:   verify :method => :put, :only => :update, :render => {:nothing => true, :status => :method_not_allowed }
chris@37:   # Creates a new page or updates an existing one
chris@37:   def update
chris@37:     @page = @wiki.find_or_new_page(params[:id])    
chris@37:     return render_403 unless editable?
chris@37:     @page.content = WikiContent.new(:page => @page) if @page.new_record?
chris@37:     
chris@37:     @content = @page.content_for_version(params[:version])
chris@37:     @content.text = initial_page_content(@page) if @content.text.blank?
chris@37:     # don't keep previous comment
chris@37:     @content.comments = nil
chris@37: 
chris@37:     if !@page.new_record? && params[:content].present? && @content.text == params[:content][:text]
chris@37:       attachments = Attachment.attach_files(@page, params[:attachments])
chris@37:       render_attachment_warning_if_needed(@page)
chris@37:       # don't save if text wasn't changed
chris@37:       redirect_to :action => 'show', :project_id => @project, :id => @page.title
chris@37:       return
chris@37:     end
chris@37:     @content.attributes = params[:content]
chris@37:     @content.author = User.current
chris@37:     # if page is new @page.save will also save content, but not if page isn't a new record
chris@37:     if (@page.new_record? ? @page.save : @content.save)
chris@37:       attachments = Attachment.attach_files(@page, params[:attachments])
chris@37:       render_attachment_warning_if_needed(@page)
chris@37:       call_hook(:controller_wiki_edit_after_save, { :params => params, :page => @page})
chris@37:       redirect_to :action => 'show', :project_id => @project, :id => @page.title
chris@37:     end
chris@37: 
chris@37:   rescue ActiveRecord::StaleObjectError
chris@37:     # Optimistic locking exception
chris@37:     flash[:error] = l(:notice_locking_conflict)
chris@37:   end
chris@37: 
Chris@0:   # rename a page
Chris@0:   def rename
Chris@0:     return render_403 unless editable?
Chris@0:     @page.redirect_existing_links = true
Chris@0:     # used to display the *original* title if some AR validation errors occur
Chris@0:     @original_title = @page.pretty_title
Chris@0:     if request.post? && @page.update_attributes(params[:wiki_page])
Chris@0:       flash[:notice] = l(:notice_successful_update)
chris@37:       redirect_to :action => 'show', :project_id => @project, :id => @page.title
Chris@0:     end
Chris@0:   end
Chris@0:   
Chris@0:   def protect
Chris@0:     @page.update_attribute :protected, params[:protected]
chris@37:     redirect_to :action => 'show', :project_id => @project, :id => @page.title
Chris@0:   end
Chris@0: 
Chris@0:   # show page history
Chris@0:   def history
Chris@0:     @version_count = @page.content.versions.count
Chris@0:     @version_pages = Paginator.new self, @version_count, per_page_option, params['p']
Chris@0:     # don't load text    
Chris@0:     @versions = @page.content.versions.find :all, 
Chris@0:                                             :select => "id, author_id, comments, updated_on, version",
Chris@0:                                             :order => 'version DESC',
Chris@0:                                             :limit  =>  @version_pages.items_per_page + 1,
Chris@0:                                             :offset =>  @version_pages.current.offset
Chris@0: 
Chris@0:     render :layout => false if request.xhr?
Chris@0:   end
Chris@0:   
Chris@0:   def diff
Chris@0:     @diff = @page.diff(params[:version], params[:version_from])
Chris@0:     render_404 unless @diff
Chris@0:   end
Chris@0:   
Chris@0:   def annotate
Chris@0:     @annotate = @page.annotate(params[:version])
Chris@0:     render_404 unless @annotate
Chris@0:   end
chris@37: 
chris@37:   verify :method => :delete, :only => [:destroy], :redirect_to => { :action => :show }
Chris@0:   # Removes a wiki page and its history
Chris@0:   # Children can be either set as root pages, removed or reassigned to another parent page
Chris@0:   def destroy
Chris@0:     return render_403 unless editable?
Chris@0:     
Chris@0:     @descendants_count = @page.descendants.size
Chris@0:     if @descendants_count > 0
Chris@0:       case params[:todo]
Chris@0:       when 'nullify'
Chris@0:         # Nothing to do
Chris@0:       when 'destroy'
Chris@0:         # Removes all its descendants
Chris@0:         @page.descendants.each(&:destroy)
Chris@0:       when 'reassign'
Chris@0:         # Reassign children to another parent page
Chris@0:         reassign_to = @wiki.pages.find_by_id(params[:reassign_to_id].to_i)
Chris@0:         return unless reassign_to
Chris@0:         @page.children.each do |child|
Chris@0:           child.update_attribute(:parent, reassign_to)
Chris@0:         end
Chris@0:       else
Chris@0:         @reassignable_to = @wiki.pages - @page.self_and_descendants
Chris@0:         return
Chris@0:       end
Chris@0:     end
Chris@0:     @page.destroy
chris@37:     redirect_to :action => 'index', :project_id => @project
Chris@0:   end
Chris@0: 
chris@37:   # Export wiki to a single html file
chris@37:   def export
chris@37:     if User.current.allowed_to?(:export_wiki_pages, @project)
chris@37:       @pages = @wiki.pages.find :all, :order => 'title'
chris@37:       export = render_to_string :action => 'export_multiple', :layout => false
chris@37:       send_data(export, :type => 'text/html', :filename => "wiki.html")
Chris@0:     else
chris@37:       redirect_to :action => 'show', :project_id => @project, :id => nil
Chris@0:     end
chris@37:   end
chris@37: 
chris@37:   def date_index
chris@37:     load_pages_grouped_by_date_without_content
Chris@0:   end
Chris@0:   
Chris@0:   def preview
chris@37:     page = @wiki.find_page(params[:id])
Chris@0:     # page is nil when previewing a new page
Chris@0:     return render_403 unless page.nil? || editable?(page)
Chris@0:     if page
Chris@0:       @attachements = page.attachments
Chris@0:       @previewed = page.content
Chris@0:     end
Chris@0:     @text = params[:content][:text]
Chris@0:     render :partial => 'common/preview'
Chris@0:   end
Chris@0: 
Chris@0:   def add_attachment
Chris@0:     return render_403 unless editable?
Chris@0:     attachments = Attachment.attach_files(@page, params[:attachments])
Chris@0:     render_attachment_warning_if_needed(@page)
chris@37:     redirect_to :action => 'show', :id => @page.title, :project_id => @project
Chris@0:   end
Chris@0: 
Chris@0: private
Chris@0:   
Chris@0:   def find_wiki
chris@37:     @project = Project.find(params[:project_id])
Chris@0:     @wiki = @project.wiki
Chris@0:     render_404 unless @wiki
Chris@0:   rescue ActiveRecord::RecordNotFound
Chris@0:     render_404
Chris@0:   end
Chris@0:   
Chris@0:   # Finds the requested page and returns a 404 error if it doesn't exist
Chris@0:   def find_existing_page
chris@37:     @page = @wiki.find_page(params[:id])
Chris@0:     render_404 if @page.nil?
Chris@0:   end
Chris@0:   
Chris@0:   # Returns true if the current user is allowed to edit the page, otherwise false
Chris@0:   def editable?(page = @page)
Chris@0:     page.editable_by?(User.current)
Chris@0:   end
Chris@0: 
Chris@0:   # Returns the default content of a new wiki page
Chris@0:   def initial_page_content(page)
Chris@0:     helper = Redmine::WikiFormatting.helper_for(Setting.text_formatting)
Chris@0:     extend helper unless self.instance_of?(helper)
Chris@0:     helper.instance_method(:initial_page_content).bind(self).call(page)
Chris@0:   end
chris@37: 
chris@37:   # eager load information about last updates, without loading text
chris@37:   def load_pages_grouped_by_date_without_content
chris@37:     @pages = @wiki.pages.find :all, :select => "#{WikiPage.table_name}.*, #{WikiContent.table_name}.updated_on",
chris@37:                                     :joins => "LEFT JOIN #{WikiContent.table_name} ON #{WikiContent.table_name}.page_id = #{WikiPage.table_name}.id",
chris@37:                                     :order => 'title'
chris@37:     @pages_by_date = @pages.group_by {|p| p.updated_on.to_date}
chris@37:     @pages_by_parent_id = @pages.group_by(&:parent_id)
chris@37:   end
chris@37:   
Chris@0: end