Implement client get/set display name endpoint

Add ability to unset avatar URL/display name

lib/architex/schema/account.ex

@@ -16,7 +16,8 @@ defmodule Architex.Account do
   schema "accounts" do
     field :localpart, :string
     field :password_hash, :string, redact: true
-    field :avatar_url
+    field :avatar_url, :string
+    field :displayname, :string
     has_many :devices, Device
 
     many_to_many :joined_rooms, Room,

lib/architex_web/client/controllers/profile_controller.ex

@@ -1,4 +1,5 @@
 defmodule ArchitexWeb.Client.ProfileController do
+  # TODO: Changes should be propagated using join events and presence.
   use ArchitexWeb, :controller
 
   import ArchitexWeb.Error
@@ -9,18 +10,32 @@ defmodule ArchitexWeb.Client.ProfileController do
   alias Plug.Conn
   alias Ecto.Changeset
 
+  @doc """
+  Get the user's display name.
+
+  Action for GET /_matrix/client/r0/profile/{userId}/displayname.
+  """
+  def get_displayname(conn, %{"user_id" => user_id}) do
+    get_property(conn, :displayname, user_id)
+  end
+
   @doc """
   Get the user's avatar URL.
 
   Action for GET /_matrix/client/r0/profile/{userId}/avatar_url.
   """
   def get_avatar_url(conn, %{"user_id" => user_id}) do
+    get_property(conn, :avatar_url, user_id)
+  end
+
+  defp get_property(conn, property_key, 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{avatar_url: avatar_url} ->
-              data = if avatar_url, do: %{avatar_url: avatar_url}, else: %{}
+            %Account{} = account ->
+              property_val = Map.get(account, property_key)
+              data = if property_val, do: %{property_key => property_val}, else: %{}
 
               conn
               |> put_status(200)
@@ -39,20 +54,33 @@ defmodule ArchitexWeb.Client.ProfileController do
     end
   end
 
+  @doc """
+  This API sets the given user's display name.
+
+  Action for PUT /_matrix/client/r0/profile/{userId}/displayname.
+  """
+  def set_displayname(conn, %{"user_id" => user_id} = params) do
+    displayname = Map.get(params, "displayname")
+
+    update_property(conn, :displayname, displayname, user_id)
+  end
+
   @doc """
   This API sets the given user's avatar URL.
 
   Action for PUT /_matrix/client/r0/profile/{userId}/avatar_url.
   """
-  def set_avatar_url(%Conn{assigns: %{account: account}} = conn, %{"user_id" => user_id} = params) do
-    if Account.get_mxid(account) == user_id do
-      avatar_url = Map.get(params, "avatar_url")
+  def set_avatar_url(conn, %{"user_id" => user_id} = params) do
+    avatar_url = Map.get(params, "avatar_url")
 
-      if not is_nil(avatar_url) do
-        account
-        |> Changeset.change(avatar_url: avatar_url)
-        |> Repo.update()
-      end
+    update_property(conn, :avatar_url, avatar_url, user_id)
+  end
+
+  defp update_property(%Conn{assigns: %{account: account}} = conn, property_key, property, user_id) do
+    if Account.get_mxid(account) == user_id do
+      account
+      |> Changeset.change([{property_key, property}])
+      |> Repo.update()
 
       conn
       |> send_resp(200, [])

lib/architex_web/router.ex

@@ -26,12 +26,22 @@ defmodule ArchitexWeb.Router do
     pipe_through :public
 
     scope "/r0" do
-      post "/register", RegisterController, :register
-      get "/register/available", AccountController, :available
-      get "/login", LoginController, :login_types
-      post "/login", LoginController, :login
       get "/directory/list/room/:room_id", RoomDirectoryController, :get_visibility
-      get "/profile/:user_id/avatar_url", ProfileController, :get_avatar_url
+
+      scope "/login" do
+        get "/", LoginController, :login_types
+        post "/", LoginController, :login
+      end
+
+      scope "/register" do
+        post "/", RegisterController, :register
+        get "/available", AccountController, :available
+      end
+
+      scope "/profile/:user_id" do
+        get "/avatar_url", ProfileController, :get_avatar_url
+        get "/displayname", ProfileController, :get_displayname
+      end
     end
 
     get "/versions", InfoController, :versions
@@ -56,7 +66,11 @@ defmodule ArchitexWeb.Router do
       get "/joined_rooms", RoomController, :joined_rooms
       get "/capabilities", InfoController, :capabilities
       get "/sync", SyncController, :sync
-      put "/profile/:user_id/avatar_url", ProfileController, :set_avatar_url
+
+      scope "/profile/:user_id" do
+        put "/avatar_url", ProfileController, :set_avatar_url
+        put "/displayname", ProfileController, :set_displayname
+      end
 
       scope "/directory" do
         put "/room/:alias", AliasesController, :create

priv/repo/migrations/20210830160818_create_initial_tables.exs

@@ -6,6 +6,7 @@ defmodule Architex.Repo.Migrations.CreateInitialTables do
       add :localpart, :string, null: false
       add :password_hash, :string, size: 60, null: false
       add :avatar_url, :string, null: true
+      add :displayname, :string, null: true
       timestamps(updated_at: false)
     end