Support for subforums (#3831).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@10142 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/controllers/messages_controller.rb

@@ -22,6 +22,7 @@ class MessagesController < ApplicationController
   before_filter :find_message, :except => [:new, :preview]
   before_filter :authorize, :except => [:preview, :edit, :destroy]
 
+  helper :boards
   helper :watchers
   helper :attachments
   include AttachmentsHelper

app/helpers/boards_helper.rb

@@ -18,4 +18,24 @@
 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 
 module BoardsHelper
+  def board_breadcrumb(item)
+    board = item.is_a?(Message) ? item.board : item
+    links = [link_to(l(:label_board_plural), project_boards_path(item.project))]
+    boards = board.ancestors.reverse
+    if item.is_a?(Message)
+      boards << board
+    end
+    links += boards.map {|ancestor| link_to(h(ancestor.name), project_board_path(ancestor.project, ancestor))}
+    breadcrumb links
+  end
+
+  def boards_options_for_select(boards)
+    options = []
+    Board.board_tree(boards) do |board, level|
+      label = (level > 0 ? '&nbsp;' * 2 * level + '&#187; ' : '').html_safe
+      label << board.name
+      options << [label, board.id]
+    end
+    options
+  end
 end

app/models/board.rb

@@ -21,26 +21,37 @@ class Board < ActiveRecord::Base
   has_many :topics, :class_name => 'Message', :conditions => "#{Message.table_name}.parent_id IS NULL", :order => "#{Message.table_name}.created_on DESC"
   has_many :messages, :dependent => :destroy, :order => "#{Message.table_name}.created_on DESC"
   belongs_to :last_message, :class_name => 'Message', :foreign_key => :last_message_id
-  acts_as_list :scope => :project_id
+  acts_as_tree :dependent => :nullify
+  acts_as_list :scope => '(project_id = #{project_id} AND parent_id #{parent_id ? "= #{parent_id}" : "IS NULL"})'
   acts_as_watchable
 
   validates_presence_of :name, :description
   validates_length_of :name, :maximum => 30
   validates_length_of :description, :maximum => 255
+  validate :validate_board
 
   scope :visible, lambda {|*args| { :include => :project,
                                           :conditions => Project.allowed_to_condition(args.shift || User.current, :view_messages, *args) } }
 
-  safe_attributes 'name', 'description', 'move_to'
+  safe_attributes 'name', 'description', 'parent_id', 'move_to'
 
   def visible?(user=User.current)
     !user.nil? && user.allowed_to?(:view_messages, project)
   end
 
+  def reload(*args)
+    @valid_parents = nil
+    super
+  end
+
   def to_s
     name
   end
 
+  def valid_parents
+    @valid_parents ||= project.boards - self_and_descendants
+  end
+
   def reset_counters!
     self.class.reset_counters!(id)
   end
@@ -53,4 +64,26 @@ class Board < ActiveRecord::Base
                " last_message_id = (SELECT MAX(id) FROM #{Message.table_name} WHERE board_id=#{board_id})",
                ["id = ?", board_id])
   end
+
+  def self.board_tree(boards, parent_id=nil, level=0)
+    tree = []
+    boards.select {|board| board.parent_id == parent_id}.sort_by(&:position).each do |board|
+      tree << [board, level]
+      tree += board_tree(boards, board.id, level+1)
+    end
+    if block_given?
+      tree.each do |board, level|
+        yield board, level
+      end
+    end
+    tree
+  end
+
+  protected
+
+  def validate_board
+    if parent_id && parent_id_changed?
+      errors.add(:parent_id, :invalid) unless valid_parents.include?(parent)
+    end
+  end
 end

app/views/boards/_form.html.erb

@@ -3,4 +3,7 @@
 <div class="box tabular">
 <p><%= f.text_field :name, :required => true %></p>
 <p><%= f.text_field :description, :required => true, :size => 80 %></p>
+<% if @board.valid_parents.any? %>
+<p><%= f.select :parent_id, boards_options_for_select(@board.valid_parents), :include_blank => true, :label => :field_board_parent %></p>
+<% end %>
 </div>

app/views/boards/index.html.erb

@@ -8,9 +8,9 @@
     <th><%= l(:label_message_last) %></th>
   </tr></thead>
   <tbody>
-<% for board in @boards %>
+<% Board.board_tree(@boards) do |board, level| %>
   <tr class="<%= cycle 'odd', 'even' %>">
-    <td>
+    <td style="padding-left: <%= level * 18 %>px;">
       <%= link_to h(board.name), {:action => 'show', :id => board}, :class => "board"  %><br />
       <%=h board.description %>
     </td>

app/views/boards/show.html.erb

@@ -1,4 +1,4 @@
-<%= breadcrumb link_to(l(:label_board_plural), project_boards_path(@project)) %>
+<%= board_breadcrumb(@board) %>
 
 <div class="contextual">
 <%= link_to_if_authorized l(:label_message_new),

app/views/messages/_form.html.erb

@@ -18,7 +18,7 @@
 
 <% if !replying && !@message.new_record? && @message.safe_attribute?('board_id') %>
   <p><label><%= l(:label_board) %></label><br />
-  <%= f.select :board_id, @project.boards.collect {|b| [b.name, b.id]} %></p>
+  <%= f.select :board_id, boards_options_for_select(@message.project.boards) %></p>
 <% end %>
 
 <p>

app/views/messages/edit.html.erb

@@ -1,5 +1,4 @@
-<%= breadcrumb link_to(l(:label_board_plural), project_boards_path(@project)),
-               link_to(h(@board.name), project_board_path(@project, @board)) %>
+<%= board_breadcrumb(@message) %>
 
 <h2><%= avatar(@topic.author, :size => "24") %><%=h @topic.subject %></h2>
 

app/views/messages/show.html.erb

@@ -1,5 +1,4 @@
-<%= breadcrumb link_to(l(:label_board_plural), project_boards_path(@project)),
-               link_to(h(@board.name), project_board_path(@project, @board)) %>
+<%= board_breadcrumb(@message) %>
 
 <div class="contextual">
     <%= watcher_tag(@topic, User.current) %>

app/views/projects/settings/_boards.html.erb

@@ -7,10 +7,10 @@
     <th></th>
   </tr></thead>
   <tbody>
-<% @project.boards.each do |board|
+<% Board.board_tree(@project.boards) do |board, level|
   next if board.new_record? %>
   <tr class="<%= cycle 'odd', 'even' %>">
-    <td><%= link_to board.name, project_board_path(@project, board) %></td>
+    <td style="padding-left: <%= level * 18 %>px;"><%= link_to board.name, project_board_path(@project, board) %></td>
     <td><%=h board.description %></td>
     <td align="center">
     <% if authorize_for("boards", "edit") %>