From ff8a0e6260d9b251a27a8c31a6baf81a988764fc Mon Sep 17 00:00:00 2001
From: Kevin ANATOLE <kevanatole@gmail.com>
Date: Sat, 18 Feb 2023 10:50:52 +0000
Subject: [PATCH] Login

---
 .../auth/error_response.ex                         |  3 +++
 .../controllers/user_controller.ex                 | 13 +++++++++++++
 lib/phoenix_api_template_web/router.ex             | 14 ++++++++++++++
 test_requests/login.http                           |  8 ++++++++
 4 files changed, 38 insertions(+)
 create mode 100644 lib/phoenix_api_template_web/auth/error_response.ex
 create mode 100644 test_requests/login.http

diff --git a/lib/phoenix_api_template_web/auth/error_response.ex b/lib/phoenix_api_template_web/auth/error_response.ex
new file mode 100644
index 0000000..cdf0f7f
--- /dev/null
+++ b/lib/phoenix_api_template_web/auth/error_response.ex
@@ -0,0 +1,3 @@
+defmodule PhoenixApiTemplateWeb.Auth.ErrorResponse.Unauthorized do
+  defexception message: "Unauthorized", plug_status: 401
+end
diff --git a/lib/phoenix_api_template_web/controllers/user_controller.ex b/lib/phoenix_api_template_web/controllers/user_controller.ex
index d30d2f7..a347e0b 100644
--- a/lib/phoenix_api_template_web/controllers/user_controller.ex
+++ b/lib/phoenix_api_template_web/controllers/user_controller.ex
@@ -1,6 +1,7 @@
 defmodule PhoenixApiTemplateWeb.UserController do
   use PhoenixApiTemplateWeb, :controller
 
+  alias PhoenixApiTemplateWeb.Auth.ErrorResponse.Unauthorized
   alias PhoenixApiTemplateWeb.Auth.Guardian
   alias PhoenixApiTemplate.Accounts
   alias PhoenixApiTemplate.Accounts.User
@@ -24,6 +25,18 @@ defmodule PhoenixApiTemplateWeb.UserController do
     end
   end
 
+  def sign_in(conn, %{"email" => email, "password" => password}) do
+    case Guardian.authenticate(email, password) do
+      {:ok, user, token} ->
+        conn
+        |> put_status(:ok)
+        |> render("user_token.json", %{user: user, token: token})
+
+      {:error, :unauthorized} ->
+        raise Unauthorized, message: "Invalid credentials"
+    end
+  end
+
   def show(conn, %{"id" => id}) do
     user = Accounts.get_user!(id)
     render(conn, "show.json", user: user)
diff --git a/lib/phoenix_api_template_web/router.ex b/lib/phoenix_api_template_web/router.ex
index ad38dbf..296039b 100644
--- a/lib/phoenix_api_template_web/router.ex
+++ b/lib/phoenix_api_template_web/router.ex
@@ -1,5 +1,18 @@
 defmodule PhoenixApiTemplateWeb.Router do
   use PhoenixApiTemplateWeb, :router
+  use Plug.ErrorHandler
+
+  defp handle_errors(conn, %{reason: %Phoenix.Router.NoRouteError{message: message}}) do
+    conn
+    |> json(%{errors: message})
+    |> halt()
+  end
+
+  defp handle_errors(conn, %{reason: %{message: message}}) do
+    conn
+    |> json(%{errors: message})
+    |> halt()
+  end
 
   pipeline :api do
     plug(:accepts, ["json"])
@@ -10,5 +23,6 @@ defmodule PhoenixApiTemplateWeb.Router do
 
     get("/", DefaultController, :index)
     post("/register", UserController, :create)
+    post("/login", UserController, :sign_in)
   end
 end
diff --git a/test_requests/login.http b/test_requests/login.http
new file mode 100644
index 0000000..4163c75
--- /dev/null
+++ b/test_requests/login.http
@@ -0,0 +1,8 @@
+POST http://localhost:4000/api/login HTTP/1.1
+content-type: application/json
+
+{ 
+    "email": "test4@yopmail.com",
+    "password": "yolo"
+}
+ 
\ No newline at end of file