[studio] Add ability to move directories

src/olympic/keel/include/keel/assetmanager.hpp

@@ -238,6 +238,9 @@ class AssetManager {
 				}
 
 				ox::Error updateAssetId(ox::StringViewCR oldId, ox::StringViewCR newId) noexcept final {
+					if (!m_cache.contains(oldId)) {
+						return {};
+					}
 					auto &o = m_cache[oldId];
 					auto &n = m_cache[newId];
 					n = std::move(o);
@@ -246,11 +249,14 @@ class AssetManager {
 				}
 
 				void gc() noexcept final {
-					for (auto const&ack : m_cache.keys()) {
+					for (size_t i = 0; i < m_cache.keys().size();) {
+						auto const &ack = m_cache.keys()[i];
 						auto &ac = m_cache[ack];
 						if (!ac->references()) {
 							m_cache.erase(ack);
+							continue;
 						}
+						++i;
 					}
 				}
 
@@ -309,6 +315,9 @@ class AssetManager {
 			if (m_fileUpdated.contains(newId)) {
 				return ox::Error{1, "new asset ID already has an entry"};
 			}
+			if (!m_fileUpdated.contains(oldId)) {
+				return {};
+			}
 			auto &o = m_fileUpdated[oldId];
 			auto &n = m_fileUpdated[newId];
 			n = std::move(o);