feat: add oidc login using keycloak

lib/putzplan/accounts/user.ex

@@ -20,6 +20,21 @@ defmodule Putzplan.Accounts.User do
       store_all_tokens? true
       require_token_presence_for_authentication? true
     end
+
+    strategies do
+      oidc :oidc do
+        client_id "putzplan"
+        base_url "http://localhost:8080/realms/master/"
+        client_secret "Kc3DkJiIrIr59HQhDmneqqB3iy6H8gxH"
+        nonce true
+        redirect_uri "http://localhost:4000/auth"
+        authorization_params [scope: "profile email"]
+      end
+    end
+  end
+
+  identities do
+    identity :id, [:id]
   end
 
   sqlite do
@@ -36,6 +51,24 @@ defmodule Putzplan.Accounts.User do
       get? true
       prepare AshAuthentication.Preparations.FilterBySubject
     end
+
+    create :register_with_oidc do
+      argument :user_info, :map, allow_nil?: false
+      argument :oauth_tokens, :map, allow_nil?: false
+      upsert? true
+      upsert_identity :id
+
+      change AshAuthentication.GenerateTokenChange
+
+      change fn changeset, _ctx ->
+        user_info = Ash.Changeset.get_argument(changeset, :user_info)
+        dbg(user_info)
+
+        changeset
+        |> Ash.Changeset.change_attribute(:name, user_info["name"])
+        |> Ash.Changeset.change_attribute(:id, user_info["sub"])
+      end
+    end
   end
 
   policies do
@@ -49,6 +82,7 @@ defmodule Putzplan.Accounts.User do
   end
 
   attributes do
-    uuid_primary_key :id
+    attribute :id, :uuid, allow_nil?: false, primary_key?: true
+    attribute :name, :string, allow_nil?: false
   end
 end

priv/repo/migrations/20250405114509_add_user_name.exs

@@ -0,0 +1,9 @@
+defmodule Putzplan.Repo.Migrations.AddUserName do
+  use Ecto.Migration
+
+  def change do
+    alter table(:users, primary_key: false) do
+      add :name, :string, null: false
+    end
+  end
+end