lib/pleroma/web/api_spec/operations/account_operation.ex

@@ -451,6 +451,20 @@ def endorsements_operation do
     }
   end
 
+  def preferences_operation do
+    %Operation{
+      tags: ["Account Preferences"],
+      description: "Preferences defined by the user in their account settings.",
+      summary: "Preferred common behaviors to be shared across clients.",
+      operationId: "AccountController.preferences",
+      security: [%{"oAuth" => ["read:accounts"]}],
+      responses: %{
+        200 => Operation.response("Preferences", "application/json", Account),
+        401 => Operation.response("Error", "application/json", ApiError)
+      }
+    }
+  end
+
   def identity_proofs_operation do
     %Operation{
       tags: ["Retrieve account information"],

lib/pleroma/web/mastodon_api/controllers/account_controller.ex

@@ -51,7 +51,7 @@ defmodule Pleroma.Web.MastodonAPI.AccountController do
   plug(
     OAuthScopesPlug,
     %{scopes: ["read:accounts"]}
-    when action in [:verify_credentials, :endorsements, :identity_proofs]
+    when action in [:verify_credentials, :endorsements, :identity_proofs, :preferences]
   )
 
   plug(
@@ -544,4 +544,9 @@ def endorsements(conn, params), do: MastodonAPIController.empty_array(conn, para
 
   @doc "GET /api/v1/identity_proofs"
   def identity_proofs(conn, params), do: MastodonAPIController.empty_array(conn, params)
+
+  @doc "GET /api/v1/preferences"
+  def preferences(%{assigns: %{user: user}} = conn, params) do
+    render(conn, "preferences.json", user: user)
+  end
 end

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

@@ -315,6 +315,17 @@ defp do_render("show.json", %{user: user} = opts) do
     |> maybe_put_email_address(user, opts[:for])
   end
 
+  def render("preferences.json", %{user: user} = opts) do
+    # TODO: Do we expose more settings that make sense to plug in here?
+    %{
+      "posting:default:visibility": user.default_scope,
+      "posting:default:sensitive": false,
+      "posting:default:language": nil,
+      "reading:expand:media": "default",
+      "reading:expand:spoilers": false
+    }
+  end
+
   defp username_from_nickname(string) when is_binary(string) do
     hd(String.split(string, "@"))
   end

lib/pleroma/web/router.ex

@@ -629,6 +629,8 @@ defmodule Pleroma.Web.Router do
     post("/tags/:id/follow", TagController, :follow)
     post("/tags/:id/unfollow", TagController, :unfollow)
     get("/followed_tags", TagController, :show_followed)
+
+    get("/preferences", AccountController, :preferences)
   end
 
   scope "/api/web", Pleroma.Web do

test/pleroma/web/mastodon_api/controllers/account_controller_test.exs

@@ -2060,4 +2060,32 @@ test "removing user from followers errors", %{user: user, conn: conn} do
       assert %{"error" => "Record not found"} = json_response_and_validate_schema(conn_res, 404)
     end
   end
+
+  describe "preferences" do
+    test "get account preferences" do
+      user = insert(:user, default_scope: "public")
+      %{conn: conn} = oauth_access(["read:accounts"], user: user)
+
+      conn = get(conn, "/api/v1/preferences")
+      response = json_response_and_validate_schema(conn, 200)
+
+      assert %{
+               "posting:default:language" => nil,
+               "posting:default:sensitive" => false,
+               "posting:default:visibility" => "public",
+               "reading:expand:media" => "default",
+               "reading:expand:spoilers" => false
+             } = response
+    end
+
+    test "test changing account preferences" do
+      user = insert(:user, default_scope: "unlisted")
+      %{conn: conn} = oauth_access(["read:accounts"], user: user)
+
+      conn = get(conn, "/api/v1/preferences")
+      response = json_response_and_validate_schema(conn, 200)
+
+      assert response["posting:default:visibility"] == "unlisted"
+    end
+  end
 end