fix registration email

lib/cannery/mailer.ex

@@ -1,33 +1,40 @@
 defmodule Cannery.Mailer do
   @moduledoc """
   Mailer adapter for emails
+
+  Since emails are loaded as Oban jobs, the `:attrs` map must be serializable to
+  json with Jason, which restricts the use of structs.
   """
 
   use Swoosh.Mailer, otp_app: :cannery
-  alias Cannery.{Accounts.User, Email, EmailWorker}
+  alias Cannery.{Accounts.User, EmailWorker}
   alias Oban.Job
 
   @doc """
   Deliver instructions to confirm account.
   """
-  @spec deliver_confirmation_instructions(User.t(), String.t()) :: {:ok, Job.t()}
-  def deliver_confirmation_instructions(user, url) do
-    {:ok, Email.welcome_email(user, url) |> EmailWorker.new() |> Oban.insert!()}
+  @spec deliver_confirmation_instructions(User.t(), String.t()) :: Job.t()
+  def deliver_confirmation_instructions(%User{id: user_id}, url) do
+    %{email: :welcome, user_id: user_id, attrs: %{url: url}}
+    |> EmailWorker.new()
+    |> Oban.insert!()
   end
 
   @doc """
   Deliver instructions to reset a user password.
   """
-  @spec deliver_reset_password_instructions(User.t(), String.t()) :: {:ok, Job.t()}
-  def deliver_reset_password_instructions(user, url) do
-    {:ok, Email.reset_password_email(user, url) |> EmailWorker.new() |> Oban.insert!()}
+  @spec deliver_reset_password_instructions(User.t(), String.t()) :: Job.t()
+  def deliver_reset_password_instructions(%User{id: user_id}, url) do
+    %{email: :reset_password, user_id: user_id, attrs: %{url: url}}
+    |> EmailWorker.new()
+    |> Oban.insert!()
   end
 
   @doc """
   Deliver instructions to update a user email.
   """
-  @spec deliver_update_email_instructions(User.t(), String.t()) :: {:ok, Job.t()}
-  def deliver_update_email_instructions(user, url) do
-    {:ok, Email.update_email(user, url) |> EmailWorker.new() |> Oban.insert!()}
+  @spec deliver_update_email_instructions(User.t(), String.t()) :: Job.t()
+  def deliver_update_email_instructions(%User{id: user_id}, url) do
+    %{email: :update, user_id: user_id, attrs: %{url: url}} |> EmailWorker.new() |> Oban.insert!()
   end
 end