1 files changed, 170 insertions, 0 deletions
diff --git a/app/mailers/previews/notify_preview.rb b/app/mailers/previews/notify_preview.rb
new file mode 100644
index 00000000000..3615cde8026
--- /dev/null
+++ b/app/mailers/previews/notify_preview.rb
@@ -0,0 +1,170 @@
+class NotifyPreview < ActionMailer::Preview
+  def note_merge_request_email_for_individual_note
+    note_email(:note_merge_request_email) do
+      note = <<-MD.strip_heredoc
+        This is an individual note on a merge request :smiley:
+
+        In this notification email, we expect to see:
+
+        - The note contents (that's what you're looking at)
+        - A link to view this note on Gitlab
+        - An explanation for why the user is receiving this notification
+      MD
+
+      create_note(noteable_type: 'merge_request', noteable_id: merge_request.id, note: note)
+    end
+  end
+
+  def note_merge_request_email_for_discussion
+    note_email(:note_merge_request_email) do
+      note = <<-MD.strip_heredoc
+        This is a new discussion on a merge request :smiley:
+
+        In this notification email, we expect to see:
+
+        - A line saying who started this discussion
+        - The note contents (that's what you're looking at)
+        - A link to view this discussion on Gitlab
+        - An explanation for why the user is receiving this notification
+      MD
+
+      create_note(noteable_type: 'merge_request', noteable_id: merge_request.id, type: 'DiscussionNote', note: note)
+    end
+  end
+
+  def note_merge_request_email_for_diff_discussion
+    note_email(:note_merge_request_email) do
+      note = <<-MD.strip_heredoc
+        This is a new discussion on a merge request :smiley:
+
+        In this notification email, we expect to see:
+
+        - A line saying who started this discussion and on what file
+        - The diff
+        - The note contents (that's what you're looking at)
+        - A link to view this discussion on Gitlab
+        - An explanation for why the user is receiving this notification
+      MD
+
+      position = Gitlab::Diff::Position.new(
+        old_path: "files/ruby/popen.rb",
+        new_path: "files/ruby/popen.rb",
+        old_line: nil,
+        new_line: 14,
+        diff_refs: merge_request.diff_refs
+      )
+
+      create_note(noteable_type: 'merge_request', noteable_id: merge_request.id, type: 'DiffNote', position: position, note: note)
+    end
+  end
+
+  def closed_issue_email
+    Notify.closed_issue_email(user.id, issue.id, user.id).message
+  end
+
+  def issue_status_changed_email
+    Notify.issue_status_changed_email(user.id, issue.id, 'closed', user.id).message
+  end
+
+  def closed_merge_request_email
+    Notify.closed_merge_request_email(user.id, issue.id, user.id).message
+  end
+
+  def merge_request_status_email
+    Notify.merge_request_status_email(user.id, merge_request.id, 'closed', user.id).message
+  end
+
+  def merged_merge_request_email
+    Notify.merged_merge_request_email(user.id, merge_request.id, user.id).message
+  end
+
+  def member_access_denied_email
+    Notify.member_access_denied_email('project', project.id, user.id).message
+  end
+
+  def member_access_granted_email
+    Notify.member_access_granted_email('project', user.id).message
+  end
+
+  def member_access_requested_email
+    Notify.member_access_requested_email('group', user.id, 'some@example.com').message
+  end
+
+  def member_invite_accepted_email
+    Notify.member_invite_accepted_email('project', user.id).message
+  end
+
+  def member_invite_declined_email
+    Notify.member_invite_declined_email(
+      'project',
+      project.id,
+      'invite@example.com',
+      user.id
+    ).message
+  end
+
+  def member_invited_email
+    Notify.member_invited_email('project', user.id, '1234').message
+  end
+
+  def pages_domain_enabled_email
+    cleanup do
+      pages_domain = PagesDomain.new(domain: 'my.example.com', project: project, verified_at: Time.now, enabled_until: 1.week.from_now)
+
+      Notify.pages_domain_enabled_email(pages_domain, user).message
+    end
+  end
+
+  def pipeline_success_email
+    Notify.pipeline_success_email(pipeline, pipeline.user.try(:email))
+  end
+
+  def pipeline_failed_email
+    Notify.pipeline_failed_email(pipeline, pipeline.user.try(:email))
+  end
+
+  private
+
+  def project
+    @project ||= Project.find_by_full_path('gitlab-org/gitlab-test')
+  end
+
+  def issue
+    @merge_request ||= project.issues.first
+  end
+
+  def merge_request
+    @merge_request ||= project.merge_requests.first
+  end
+
+  def pipeline
+    @pipeline = Ci::Pipeline.last
+  end
+
+  def user
+    @user ||= User.last
+  end
+
+  def create_note(params)
+    Notes::CreateService.new(project, user, params).execute
+  end
+
+  def note_email(method)
+    cleanup do
+      note = yield
+
+      Notify.public_send(method, user.id, note) # rubocop:disable GitlabSecurity/PublicSend
+    end
+  end
+
+  def cleanup
+    email = nil
+
+    ActiveRecord::Base.transaction do
+      email = yield
+      raise ActiveRecord::Rollback
+    end
+
+    email
+  end
+end