And here's the copy step.

git-svn-id: http://www.rousette.org.uk/svn/tracks-repos/trunk@501 a4c988fc-2ded-0310-b66e-134b36920a42

tracks/app/controllers/contexts_controller.rb

@@ -0,0 +1,150 @@
+class ContextsController < ApplicationController
+
+  helper :todos
+
+  before_filter :init, :except => [:create, :destroy, :order]
+  before_filter :init_todos, :only => :show
+  before_filter :set_context_from_params, :only => [:update, :destroy]
+  skip_before_filter :login_required, :only => [:index]
+  prepend_before_filter :login_or_feed_token_required, :only => [:index]
+  session :off, :only => :index, :if => Proc.new { |req| ['rss','atom','txt'].include?(req.parameters[:format]) }
+
+  def index
+    respond_to do |format|
+      format.html &render_contexts_html
+      format.xml  { render :xml => @contexts.to_xml( :except => :user_id ) }
+      format.rss  &render_contexts_rss_feed
+      format.atom &render_contexts_atom_feed
+      format.text { render :action => 'index_text', :layout => false, :content_type => Mime::TEXT }
+    end
+  end
+  
+  def show
+    @page_title = "TRACKS::Context: #{@context.name}"
+  end
+  
+  # Example XML usage: curl -H 'Accept: application/xml' -H 'Content-Type: application/xml'
+  #                    -u username:password
+  #                    -d '<request><context><name>new context_name</name></context></request>'
+  #                    http://our.tracks.host/contexts
+  #
+  def create
+    if params[:format] == 'application/xml' && params['exception']
+      render_failure "Expected post format is valid xml like so: <request><context><name>context name</name></context></request>."
+      return
+    end
+    @context = @user.contexts.build
+    params_are_invalid = true
+    if (params['context'] || (params['request'] && params['request']['context']))
+      @context.attributes = params['context'] || params['request']['context']
+      params_are_invalid = false
+    end
+    @saved = @context.save
+    @context_not_done_counts = { @context.id => 0 }
+    respond_to do |wants|
+      wants.js
+      wants.xml do
+        if @context.new_record? && params_are_invalid
+          render_failure "Expected post format is valid xml like so: <request><context><name>context name</name></context></request>."
+        elsif @context.new_record?
+          render_failure @context.errors.to_xml
+        else
+          render :xml => @context.to_xml( :except => :user_id )
+        end
+       end
+    end
+  end
+  
+  # Edit the details of the context
+  #
+  def update
+    params['context'] ||= {}
+    success_text = if params['field'] == 'name' && params['value']
+      params['context']['id'] = params['id'] 
+      params['context']['name'] = params['value'] 
+    end
+    @context.attributes = params["context"]
+    if @context.save
+      if params['wants_render']
+        render
+      else
+        render :text => success_text || 'Success'
+      end
+    else
+      notify :warning, "Couldn't update new context"
+      render :text => ""
+    end
+  end
+
+  # Fairly self-explanatory; deletes the context
+  # If the context contains actions, you'll get a warning dialogue.
+  # If you choose to go ahead, any actions in the context will also be deleted.
+  def destroy
+    @context.destroy
+    respond_to do |format|
+      format.js
+      format.xml { render :text => "Deleted context #{@context.name}" }
+    end
+  end
+
+  # Methods for changing the sort order of the contexts in the list
+  #
+  def order
+    params["list-contexts"].each_with_index do |id, position|
+      @user.contexts.update(id, :position => position + 1)
+    end
+    render :nothing => true
+  end
+  
+  protected
+
+    def render_contexts_html
+      lambda do
+        @page_title = "TRACKS::List Contexts"
+        @no_contexts = @contexts.empty?
+        render
+      end
+    end
+
+    def render_contexts_rss_feed
+      lambda do
+        render_rss_feed_for @contexts, :feed => Context.feed_options(@user),
+                                       :item => { :description => lambda { |c| c.summary(count_undone_todos_phrase(c)) } }
+      end
+    end
+
+    def render_contexts_atom_feed
+      lambda do
+        render_atom_feed_for @contexts, :feed => Context.feed_options(@user),
+                                        :item => { :description => lambda { |c| c.summary(count_undone_todos_phrase(c)) },
+                                                   :author => lambda { |c| nil } }
+      end
+    end
+
+    def set_context_from_params
+      @context = @user.contexts.find_by_params(params)
+    end
+     
+    def init
+      @source_view = params['_source_view'] || 'context'
+      # If we exclude completed projects, then we can't display them in the sidebar
+      # if the user sets the preference for them to be shown
+      # @projects = @user.projects.reject { |x| x.completed? }
+      init_data_for_sidebar
+      @todos = @user.todos
+      @done = @user.todos.find_in_state(:all, :completed, :order => "todos.completed_at DESC")
+    end
+
+    def init_todos
+      set_context_from_params
+      @done = @context.done_todos
+      # @not_done_todos = @context.not_done_todos
+      # TODO: Temporarily doing this search manually until I can work out a way
+      # to do the same thing using not_done_todos acts_as_todo_container method
+      # Hides actions in hidden projects from context.
+      @not_done_todos = @context.todos.find(:all, :conditions => ['todos.state = ?', 'active'], :order => "todos.due IS NULL, todos.due ASC, todos.created_at ASC", :include => :project)
+      @count = @not_done_todos.size
+      @default_project_context_name_map = build_default_project_context_name_map(@projects).to_json
+    end
+
+end