Email-like field in /api/v1/accounts/verify_credentials response (for OAuth plugins like Peertube).

Addresses https://git.pleroma.social/pleroma/pleroma-support/-/issues/56.

lib/pleroma/user.ex

@@ -2030,6 +2030,15 @@ defmodule Pleroma.User do
     |> hd()
   end
 
+  def full_nickname(%User{} = user) do
+    if String.contains?(user.nickname, "@") do
+      user.nickname
+    else
+      %{host: host} = URI.parse(user.ap_id)
+      user.nickname <> "@" <> host
+    end
+  end
+
   def full_nickname(nickname_or_mention),
     do: String.trim_leading(nickname_or_mention, "@")
 

lib/pleroma/web/mastodon_api/views/account_view.ex

@@ -262,7 +262,9 @@ defmodule Pleroma.Web.MastodonAPI.AccountView do
         }
       },
 
-      # Pleroma extension
+      # Pleroma extensions
+      # Note: it's insecure to output :email but fully-qualified nickname may serve as safe stub
+      fqn: User.full_nickname(user),
       pleroma: %{
         ap_id: user.ap_id,
         also_known_as: user.also_known_as,

lib/pleroma/web/router.ex

@@ -319,6 +319,8 @@ defmodule Pleroma.Web.Router do
   end
 
   scope "/oauth", Pleroma.Web.OAuth do
+    # Note: use /api/v1/accounts/verify_credentials for userinfo of signed-in user
+
     get("/registration_details", OAuthController, :registration_details)
 
     post("/mfa/verify", MFAController, :verify, as: :mfa_verify)

lib/pleroma/web/templates/embed/show.html.eex

@@ -6,7 +6,7 @@
       </div>
       <span class="display-name" style="padding-left: 0.5em;">
         <bdi><%= raw (@author.name |> Formatter.emojify(@author.emoji)) %></bdi>
-        <span class="nickname"><%= full_nickname(@author) %></span>
+        <span class="nickname">@<%= full_nickname(@author) %></span>
       </span>
     </a>
   </div>

lib/pleroma/web/views/embed_view.ex

@@ -17,6 +17,8 @@ defmodule Pleroma.Web.EmbedView do
 
   use Phoenix.HTML
 
+  defdelegate full_nickname(user), to: User
+
   @media_types ["image", "audio", "video"]
 
   defp fetch_media_type(%{"mediaType" => mediaType}) do
@@ -30,11 +32,6 @@ defmodule Pleroma.Web.EmbedView do
     )
   end
 
-  defp full_nickname(user) do
-    %{host: host} = URI.parse(user.ap_id)
-    "@" <> user.nickname <> "@" <> host
-  end
-
   defp status_title(%Activity{object: %Object{data: %{"name" => name}}}) when is_binary(name),
     do: name
 

test/pleroma/user_test.exs

@@ -2232,6 +2232,36 @@ defmodule Pleroma.UserTest do
     end
   end
 
+  describe "local_nickname/1" do
+    test "returns nickname without host" do
+      assert User.local_nickname("@mentioned") == "mentioned"
+      assert User.local_nickname("a_local_nickname") == "a_local_nickname"
+      assert User.local_nickname("nickname@host.com") == "nickname"
+    end
+  end
+
+  describe "full_nickname/1" do
+    test "returns fully qualified nickname for local and remote users" do
+      local_user =
+        insert(:user, nickname: "local_user", ap_id: "https://somehost.com/users/local_user")
+
+      remote_user = insert(:user, nickname: "remote@host.com", local: false)
+
+      assert User.full_nickname(local_user) == "local_user@somehost.com"
+      assert User.full_nickname(remote_user) == "remote@host.com"
+    end
+
+    test "strips leading @ from mentions" do
+      assert User.full_nickname("@mentioned") == "mentioned"
+      assert User.full_nickname("@nickname@host.com") == "nickname@host.com"
+    end
+
+    test "does not modify nicknames" do
+      assert User.full_nickname("nickname") == "nickname"
+      assert User.full_nickname("nickname@host.com") == "nickname@host.com"
+    end
+  end
+
   test "avatar fallback" do
     user = insert(:user)
     assert User.avatar_url(user) =~ "/images/avi.png"

test/pleroma/web/mastodon_api/views/account_view_test.exs

@@ -73,6 +73,7 @@ defmodule Pleroma.Web.MastodonAPI.AccountViewTest do
         },
         fields: []
       },
+      fqn: "shp@shitposter.club",
       pleroma: %{
         ap_id: user.ap_id,
         also_known_as: ["https://shitposter.zone/users/shp"],
@@ -172,6 +173,7 @@ defmodule Pleroma.Web.MastodonAPI.AccountViewTest do
         },
         fields: []
       },
+      fqn: "shp@shitposter.club",
       pleroma: %{
         ap_id: user.ap_id,
         also_known_as: [],