Apply cloud themes.

Telegram/SourceFiles/data/data_cloud_themes.cpp

@@ -8,11 +8,28 @@ https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
 #include "data/data_cloud_themes.h"
 
 #include "data/data_session.h"
+#include "data/data_document.h"
 #include "main/main_session.h"
 #include "apiwrap.h"
 
 namespace Data {
 
+CloudTheme CloudTheme::Parse(
+		not_null<Main::Session*> session,
+		const MTPDtheme &data) {
+	const auto document = data.vdocument();
+	return {
+		data.vid().v,
+		data.vaccess_hash().v,
+		qs(data.vslug()),
+		qs(data.vtitle()),
+		(document
+			? session->data().processDocument(*document)->id
+			: DocumentId(0)),
+		data.is_creator() ? session->userId() : UserId(0)
+	};
+}
+
 QString CloudThemes::Format() {
 	static const auto kResult = QString::fromLatin1("tdesktop");
 	return kResult;
@@ -46,17 +63,7 @@ void CloudThemes::parseThemes(const QVector<MTPTheme> &list) {
 	_list.reserve(list.size());
 	for (const auto &theme : list) {
 		theme.match([&](const MTPDtheme &data) {
-			const auto document = data.vdocument();
-			_list.push_back({
-				data.vid().v,
-				data.vaccess_hash().v,
-				qs(data.vslug()),
-				qs(data.vtitle()),
-				(document
-					? _session->data().processDocument(*document).get()
-					: nullptr),
-				data.is_creator()
-			});
+			_list.push_back(CloudTheme::Parse(_session, data));
 		}, [&](const MTPDthemeDocumentNotModified &data) {
 			LOG(("API Error: Unexpected themeDocumentNotModified."));
 		});