Use buttons to send notifications and newsletters

As mentioned in commits 5311daadf and bb958daf0, using links combined
with JavaScript to generate POST requests to the server has a few
issues.

app/views/admin/admin_notifications/show.html.erb

@@ -64,12 +64,17 @@
 
 <% if @admin_notification.draft? && @admin_notification.valid_segment_recipient? %>
   <div class="small-12 medium-6 large-3 column end">
-    <%= link_to t("admin.admin_notifications.show.send"),
-                deliver_admin_admin_notification_path(@admin_notification),
-                "data-alert": t("admin.admin_notifications.show.send_alert",
-                                n: @admin_notification.list_of_recipients_count),
-                method: :post,
-                id: "js-send-admin_notification-alert",
-                class: "button success expanded" %>
+    <%= render Admin::ActionComponent.new(
+      :deliver,
+      @admin_notification,
+      text: t("admin.admin_notifications.show.send"),
+      method: :post,
+      "data-alert": t(
+        "admin.admin_notifications.show.send_alert",
+        n: @admin_notification.list_of_recipients_count
+      ),
+      id: "js-send-admin_notification-alert",
+      class: "button success expanded",
+    ) %>
   </div>
 <% end %>

app/views/admin/newsletters/show.html.erb

@@ -56,10 +56,13 @@
 </div>
 
 <% if @newsletter.draft? && @newsletter.valid_segment_recipient? %>
-  <%= link_to t("admin.newsletters.show.send"),
-              deliver_admin_newsletter_path(@newsletter),
-              "data-alert": t("admin.newsletters.show.send_alert", n: recipients_count),
-              method: :post,
-              id: "js-send-newsletter-alert",
-              class: "button success" %>
+  <%= render Admin::ActionComponent.new(
+    :deliver,
+    @newsletter,
+    text: t("admin.newsletters.show.send"),
+    method: :post,
+    "data-alert": t("admin.newsletters.show.send_alert", n: recipients_count),
+    id: "js-send-newsletter-alert",
+    class: "button success"
+  ) %>
 <% end %>

spec/system/admin/admin_notifications_spec.rb

@@ -190,7 +190,7 @@ describe "Admin Notifications", :admin do
 
       visit admin_admin_notification_path(notification)
 
-      accept_confirm { click_link "Send notification" }
+      accept_confirm { click_button "Send notification" }
 
       expect(page).to have_content "Notification sent successfully"
 

spec/system/admin/emails/newsletters_spec.rb

@@ -134,7 +134,7 @@ describe "Admin newsletter emails", :admin do
       newsletter = create(:newsletter)
       visit admin_newsletter_path(newsletter)
 
-      accept_confirm { click_link "Send" }
+      accept_confirm { click_button "Send" }
 
       expect(page).to have_content "Newsletter sent successfully"
     end
@@ -153,7 +153,7 @@ describe "Admin newsletter emails", :admin do
       newsletter = create(:newsletter, segment_recipient: "administrators")
       visit admin_newsletter_path(newsletter)
 
-      accept_confirm { click_link "Send" }
+      accept_confirm { click_button "Send" }
 
       expect(page).to have_content "Newsletter sent successfully"
 

spec/system/emails_spec.rb

@@ -482,7 +482,7 @@ describe "Emails" do
 
       expect(page).to have_content "Newsletter created successfully"
 
-      accept_confirm { click_link "Send" }
+      accept_confirm { click_button "Send" }
 
       expect(page).to have_content "Newsletter sent successfully"