feat: add username and display it in header

pento/lib/pento/accounts/user.ex

@@ -3,6 +3,7 @@ defmodule Pento.Accounts.User do
   import Ecto.Changeset
 
   schema "users" do
+    field :username, :string
     field :email, :string
     field :password, :string, virtual: true, redact: true
     field :hashed_password, :string, redact: true
@@ -37,9 +38,18 @@ defmodule Pento.Accounts.User do
   """
   def registration_changeset(user, attrs, opts \\ []) do
     user
-    |> cast(attrs, [:email, :password])
+    |> cast(attrs, [:email, :password, :username])
     |> validate_email(opts)
     |> validate_password(opts)
+    |> validate_username()
+  end
+
+  defp validate_username(changeset) do
+    changeset
+    |> validate_required([:username])
+    |> validate_length(:username, min: 4, max: 20)
+    |> unsafe_validate_unique(:username, Pento.Repo)
+    |> unique_constraint(:username)
   end
 
   defp validate_email(changeset, opts) do

pento/lib/pento_web/components/layouts/root.html.heex

@@ -15,7 +15,7 @@
     <ul class="relative z-10 flex items-center gap-4 px-4 sm:px-6 lg:px-8 justify-end">
       <%= if @current_user do %>
         <li class="text-[0.8125rem] leading-6 text-zinc-900">
-          <%= @current_user.email %>
+          <%= @current_user.username %>
         </li>
         <li>
           <.link

pento/lib/pento_web/live/user_registration_live.ex

@@ -31,6 +31,7 @@ defmodule PentoWeb.UserRegistrationLive do
           Oops, something went wrong! Please check the errors below.
         </.error>
 
+        <.input field={@form[:username]} type="text" label="Username" required />
         <.input field={@form[:email]} type="email" label="Email" required />
         <.input field={@form[:password]} type="password" label="Password" required />
 

pento/priv/repo/migrations/20240818133031_add_username.exs

@@ -0,0 +1,11 @@
+defmodule Pento.Repo.Migrations.AddUsername do
+  use Ecto.Migration
+
+  def change do
+    alter table("users") do
+      add :username, :string, null: false
+    end
+
+    create unique_index(:users, [:username])
+  end
+end