Add black friday email

app/mailers/user_mailer.rb

@@ -5,4 +5,9 @@ def yearly_brew
 
     mail to: @user.email, subject: "Bean There, Brewed That: Your Year in Coffee"
   end
+
+  def black_friday
+    @user = params[:user]
+    mail to: @user.email, subject: "A Different Kind of Black Friday on Visualizer"
+  end
 end

app/views/user_mailer/black_friday.html.erb

@@ -0,0 +1,38 @@
+<%= content_for :title, "Your Visualizer Premium Subscription Has Been Extended" %>
+<%= content_for :preheader, "One month added to your Premium subscription, no strings attached." %>
+<tr>
+  <td class="sm-px-0" style="width: 100%; padding-left: 24px; padding-right: 24px; text-align: left">
+    <table style="width: 100%;" cellpadding="0" cellspacing="0">
+      <tr>
+        <td>
+          <table style="width: 100%;" cellpadding="0" cellspacing="0">
+            <tr>
+              <td style="border-radius: 4px; background-color: #fff; padding: 24px; box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.05)">
+                <h1 style="margin: 0 0 36px; font-size: 36px; line-height: 36px; color: #000">
+                  Your Visualizer Subscription Just Got Extended
+                </h1>
+                <p style="margin: 0 0 24px; font-size: 16px; color: #000">
+                  In case you missed my <a class="hover-no-underline" target="_blank" style="color: #db3e27; text-decoration-line: underline" href="https://visualizer.coffee/updates/black-friday">recent update</a>, I've extended your Premium subscription by one month, completely free. No strings attached.
+                </p>
+                <p style="margin: 0 0 24px; font-size: 16px; color: #000">
+                  You can check your updated subscription details by visiting your <a class="hover-no-underline" target="_blank" style="color: #db3e27; text-decoration-line: underline" href="https://visualizer.coffee/premium/manage">subscription management page</a> or by clicking your profile picture and selecting "Manage Subscription".
+                  While you're there, it might be a good time to verify that your card information is up to date.
+                </p>
+                <p style="margin: 0 0 24px; font-size: 16px; color: #000">
+                  I've also made two simple decisions about Visualizer's future: no more discounts ever, and no price increases for the foreseeable future.
+                  For details, read the <a class="hover-no-underline" target="_blank" style="color: #db3e27; text-decoration-line: underline" href="https://visualizer.coffee/updates/black-friday">recent update</a>.
+                </p>
+                <p style="margin: 0 0 24px; font-size: 16px; color: #000">
+                  Thank you for being a Premium subscriber and supporting Visualizer's development. Enjoy your extra month! ☕️
+                </p>
+                <p style="margin: 0 0 24px; font-size: 16px; color: #000">
+                  Miha
+                </p>
+              </td>
+            </tr>
+          </table>
+        </td>
+      </tr>
+    </table>
+  </td>
+</tr>

test/mailers/previews/user_mailer_preview.rb

@@ -3,4 +3,9 @@ def yearly_brew
     user = User.order("RANDOM()").first
     UserMailer.with(user:).yearly_brew
   end
+
+  def black_friday
+    user = User.order("RANDOM()").first
+    UserMailer.with(user:).black_friday
+  end
 end