Create changeset subscription resource

app/views/changeset_subscriptions/no_such_entry.html.erb

@@ -0,0 +1,5 @@
+<% content_for :heading do %>
+  <h1><%= t ".heading", :id => h(params[:changeset_id]) %></h1>
+<% end %>
+
+<p><%= t ".body", :id => h(params[:changeset_id]) %></p>

app/views/changeset_subscriptions/show.html.erb

@@ -0,0 +1,12 @@
+<% content_for :heading do %>
+  <h1><%= @subscribed ? t(".unsubscribe.heading") : t(".subscribe.heading") %></h1>
+<% end %>
+
+<%= render :partial => "heading", :object => @changeset, :as => "changeset" %>
+
+<%= bootstrap_form_tag :method => (@subscribed ? :delete : :post) do |f| %>
+  <% if params[:referer] -%>
+  <%= f.hidden_field :referer, :value => params[:referer] %>
+  <% end -%>
+  <%= f.primary @subscribed ? t(".unsubscribe.button") : t(".subscribe.button") %>
+<% end %>

app/views/changesets/no_such_entry.html.erb

@@ -1,5 +0,0 @@
-<% content_for :heading do %>
-  <h1><%= t ".heading", :id => h(params[:id]) %></h1>
-<% end %>
-
-<p><%= t ".body", :id => h(params[:id]) %></p>

app/views/changesets/subscribe.html.erb

@@ -1,12 +0,0 @@
-<% content_for :heading do %>
-  <h1><%= t ".heading" %></h1>
-<% end %>
-
-<%= render :partial => "heading", :object => @changeset, :as => "changeset" %>
-
-<%= bootstrap_form_tag do |f| %>
-  <% if params[:referer] -%>
-  <%= f.hidden_field :referer, :value => params[:referer] %>
-  <% end -%>
-  <%= f.primary t(".button") %>
-<% end %>

app/views/changesets/unsubscribe.html.erb

@@ -1,12 +0,0 @@
-<% content_for :heading do %>
-  <h1><%= t ".heading" %></h1>
-<% end %>
-
-<%= render :partial => "heading", :object => @changeset, :as => "changeset" %>
-
-<%= bootstrap_form_tag do |f| %>
-  <% if params[:referer] -%>
-  <%= f.hidden_field :referer, :value => params[:referer] %>
-  <% end -%>
-  <%= f.primary t(".button") %>
-<% end %>

app/views/user_mailer/changeset_comment_notification.html.erb

@@ -24,6 +24,6 @@
 
 <% content_for :footer do %>
   <p>
-    <%= t ".unsubscribe_html", :url => link_to(@unsubscribe_url, @unsubscribe_url) %>
+    <%= t ".unsubscribe_html", :url => link_to(@changeset_subscription_url, @changeset_subscription_url) %>
   </p>
 <% end %>

app/views/user_mailer/changeset_comment_notification.text.erb

@@ -17,4 +17,4 @@
 
 <%= t '.details', :url => @changeset_url %>
 
-<%= t '.unsubscribe', :url => @unsubscribe_url %>
+<%= t '.unsubscribe', :url => @changeset_subscription_url %>