Add unsubscription link to every message

lib/send_it/marketing/message_notifier.ex

@@ -10,10 +10,10 @@ defmodule SendIt.Marketing.MessageNotifier do
   @from_email "newsletter@ptcoffee.com"
 
   def deliver_message(message) do
-    message.contacts
-    |> format_recipients()
-    |> dbg()
-    |> deliver(message.subject, message.content)
+    contacts = message.contacts |> format_recipients()
+    body = message.content |> format_body()
+
+    deliver(contacts, message.subject, body)
   end
 
   defp deliver(recipients, subject, body) do
@@ -22,10 +22,7 @@ defmodule SendIt.Marketing.MessageNotifier do
         to: recipients,
         from: {@from_name, @from_email},
         subject: subject,
-        html_body:
-          body
-          |> Phoenix.HTML.html_escape()
-          |> Phoenix.HTML.safe_to_string()
+        html_body: body
       )
       |> put_provider_option(:recipient_vars, format_recipient_vars(recipients))
 
@@ -48,4 +45,25 @@ defmodule SendIt.Marketing.MessageNotifier do
       Map.put_new(acc, email, %{name: name})
     end)
   end
+
+  defp format_body(content) do
+    content
+    |> add_unsubscription()
+  end
+
+  defp add_unsubscription(content) do
+    url = url(~p"/subscription")
+
+    """
+    #{content}
+    <br />
+    <br />
+
+    <hr />
+    <p>
+      <strong>Unsubscribe</strong><br />
+      If you no longer wish to receive our emails, you can <a href="#{url}?%recipient%">unsubscribe here</a>.
+    </p>
+    """
+  end
 end