From 213980a5befe9149fe0405d6467bf1b57758e8af Mon Sep 17 00:00:00 2001
From: Pim Kunis <pim@kunis.nl>
Date: Wed, 8 Sep 2021 20:21:55 +0200
Subject: [PATCH] Implement client profile information endpoint

---
 .../client/controllers/profile_controller.ex  | 34 ++++++++++++++++++-
 lib/architex_web/router.ex                    |  1 +
 2 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/lib/architex_web/client/controllers/profile_controller.ex b/lib/architex_web/client/controllers/profile_controller.ex
index 7364569..9d9ea34 100644
--- a/lib/architex_web/client/controllers/profile_controller.ex
+++ b/lib/architex_web/client/controllers/profile_controller.ex
@@ -10,6 +10,38 @@ defmodule ArchitexWeb.Client.ProfileController do
   alias Plug.Conn
   alias Ecto.Changeset
 
+  @doc """
+  Get the combined profile information for this user.
+
+  Action for GET /_matrix/client/r0/profile/{userId}.
+  """
+  def profile(conn, %{"user_id" => user_id}) do
+    case UserId.cast(user_id) do
+      {:ok, %UserId{localpart: localpart, domain: domain}} ->
+        if domain == Architex.server_name() do
+          case Repo.one(from a in Account, where: a.localpart == ^localpart) do
+            %Account{displayname: displayname, avatar_url: avatar_url} ->
+              data = %{}
+              data = if avatar_url, do: Map.put(data, :avatar_url, avatar_url), else: data
+              data = if displayname, do: Map.put(data, :displayname, displayname), else: data
+
+              conn
+              |> put_status(200)
+              |> json(data)
+
+            nil ->
+              put_error(conn, :not_found, "User was not found.")
+          end
+        else
+          # TODO: Use federation to lookup information.
+          put_error(conn, :not_found, "User was not found.")
+        end
+
+      :error ->
+        put_error(conn, :not_found, "User ID is invalid.")
+    end
+  end
+
   @doc """
   Get the user's display name.
 
@@ -45,7 +77,7 @@ defmodule ArchitexWeb.Client.ProfileController do
               put_error(conn, :not_found, "User was not found.")
           end
         else
-          # TODO: Use federation to lookup avatar URL.
+          # TODO: Use federation to lookup information.
           put_error(conn, :not_found, "User was not found.")
         end
 
diff --git a/lib/architex_web/router.ex b/lib/architex_web/router.ex
index 47ac7c0..a78247d 100644
--- a/lib/architex_web/router.ex
+++ b/lib/architex_web/router.ex
@@ -39,6 +39,7 @@ defmodule ArchitexWeb.Router do
       end
 
       scope "/profile/:user_id" do
+        get "/", ProfileController, :profile
         get "/avatar_url", ProfileController, :get_avatar_url
         get "/displayname", ProfileController, :get_displayname
       end