Added support for updating the base url

CHANGELOG.md

@@ -8,6 +8,7 @@
 
 ### Enhancements
 * Updated default base URL to be `https://services.cloud.mongodb.com` to support the new domains (was `https://realm.mongodb.com`)
+* Added support for updating Atlas Device Sync's base url, in case the need to roam between servers (cloud and/or edge server).
 
 ### Compatibility
 * Fileformat: Generates files with format v24. Reads and automatically upgrade from fileformat v10.

CMakeLists.txt

@@ -27,6 +27,7 @@ set(REALM_NO_TESTS)
 set(REALM_BUILD_LIB_ONLY)
 set(REALM_INSTALL_LIBEXECDIR)
 set(REALM_ENABLE_ENCRYPTION 1)
+set(REALM_ENABLE_EXPERIMENTAL)
 
 set(CMAKE_DEBUG_POSTFIX "-dbg")
 

include/cpprealm/app.hpp

@@ -286,6 +286,10 @@ class App {
     void clear_cached_apps();
     std::optional<App> get_cached_app(const std::string& app_id, const std::optional<std::string>& base_url);
     std::string get_base_url() const;
+
+#ifdef AD_ENABLE_EXPERIMENTAL
+    [[nodiscard]] std::future<void> App::update_base_url(std::string base_url) const;
+#endif
 private:
     std::shared_ptr<app::App> m_app;
     App(std::shared_ptr<app::App>&& a) : m_app(std::move(a)) { }

src/cpprealm/app.cpp

@@ -586,4 +586,18 @@ namespace realm {
         return std::nullopt;
     }
 
+#ifdef AD_ENABLE_EXPERIMENTAL
+    [[nodiscard]] std::future<void> App::update_base_url(std::string base_url) const {
+        std::promise<void> p;
+        std::future<void> f = p.get_future();
+        m_app->update_base_url(base_url, ([p = std::move(p)](auto err) mutable {
+            if (err) {
+                p.set_exception(std::make_exception_ptr(app_error(std::move(*err))));
+            } else {
+                p.set_value();
+            }
+        });
+        return f;
+    }
+#endif
 }

tests/sync/app_tests.cpp

@@ -79,6 +79,13 @@ TEST_CASE("app", "[app]") {
         CHECK(with_url_provided_app.get_base_url() == "https://foobar.com");
     }
 
+    SECTION("update_base_url") {
+        auto app = realm::App(realm::App::configuration({"NA", "https://foobar.com"}));
+        CHECK(app.get_base_url() == "https://foobar.com");
+        app.update_base_url("https://barfoo.com").get();
+        CHECK(app.get_base_url() == "https://barfoo.com");
+    }
+
     SECTION("get_current_user") {
         auto user = app.login(realm::App::credentials::anonymous()).get();