[WIP]Comment and subscribe

app/controllers/comment_controller.rb

@@ -19,6 +19,8 @@ def create
     @node = Node.find params[:id]
     @body = params[:body]
     @user = current_user
+    @tag_list = params[:choice]
+    TagSelection.subscribe_multiple_tags(@node,@user,@tag_list)
     begin
       @comment = create_comment(@node, @user, @body)
       respond_with do |format|

app/models/tag_selection.rb

@@ -18,4 +18,19 @@ def ruser
   def tagname
     tag.name
   end
+
+  #Given a tagList subscribe to the tags which are checked in tagList
+  # and unsubscribe to tags unchecked in the tag_list
+  def subscribe_multiple_tags(node, user, tag_list)
+      for node.tags do |t|
+        value = tag_list[t.tid]
+        subscription = TagSelection.where(:user_id => user.uid,
+                                          :tid => t.tid).first_or_create
+        subscription.following = value
+        if subscription.following_changed?
+          subscription.save!
+        end
+      end
+  end
+
 end

app/views/comments/_form.html.erb

@@ -51,10 +51,19 @@
 
         </span>
       </p>
-
     </div>
   </div>
 
+  Subscribe to popular topics:
+ <% if params[:controller] == "notes" %>
+   <%= form_for Comment.new do |f| %>
+     <% tag_list = @node.tags %>
+     <% tag_list.each do |t| %>
+       <%= check_box_tag 'choice[tid][]', t.name %>
+       <%= t.name %>
+     <% end %>
+   <% end %>
+ <% end %>
   <div class="well col-md-11" id="preview" style="background: white; display: none;">
   </div>
   <script>

app/views/subscriptions/_form.html.erb

@@ -0,0 +1,9 @@
+<div class="field">
+  <%= f.label "Subscribe to popular tags related to this post" %><br />
+  <%= f.collection_check_boxes :tids, Tag.all, :id, :name do |b| %>
+    <div class="collection-check-box">
+      <%= b.check_box %>
+      <%= b.label %>
+    </div>
+  <% end %>
+</div>

test/fixtures/tag_selections.yml

@@ -71,4 +71,14 @@ selection_ten:
 selection_eleven:
   user_id: 10
   tid: 20
-  following: true
+  following: true
+
+spectacular_one:
+  user_id: 1
+  tid: 14
+  following: false
+
+spectacular_two:
+  user_id: 1
+  tid: 12
+  following: false

test/unit/node_tag_test.rb

@@ -182,4 +182,21 @@ class NodeTagTest < ActiveSupport::TestCase
     assert_not nodes(:blog).can_tag(tagname, user)
     assert_equal I18n.t('node.page_does_not_exist'), nodes(:blog).can_tag(tagname, user, true)
   end
+
+  test 'subscribe to the tags' do
+    user = users(:bob)
+    node = nodes(:one)
+    # present in the db tag_list = { {1 => true}, {2 => true}, {14 => false}, {12 => false} }
+    # supplied with the radio buttons
+    tag_list = { {1 => true}, {2 => false}, {14 => true}, {12 => false}}
+    TagSelection.subscribe_multiple_tags(node, user, tag_list)
+    selection1 = tag_selections(:selection_one)
+    awesome = tag_selections(:awesome)
+    spectacular1 = tag_selections(:spectacular_one)
+    spectacular2 = tag_selections(:spectacular_two)
+    assert_equal selection.following, true
+    assert_equal awesome.following, false
+    assert_equal spectacular1.following, true
+    assert_equal spectacular2.following, false
+  end
 end