refactor(new_editor/app): reorganize host structure and add smoke test

new_editor/app/Features/Project/ProjectBrowserModelFolders.cpp

@@ -0,0 +1,68 @@
+#include "ProjectBrowserModelSupport.h"
+
+namespace XCEngine::UI::Editor::App {
+
+using namespace ProjectBrowserModelSupport;
+
+void ProjectBrowserModel::RefreshFolderTree() {
+    m_folderEntries.clear();
+    m_treeItems.clear();
+
+    if (m_assetsRootPath.empty() || !std::filesystem::exists(m_assetsRootPath)) {
+        return;
+    }
+
+    const auto appendFolderRecursive =
+        [&](auto&& self, const std::filesystem::path& folderPath, std::uint32_t depth) -> void {
+        const std::string itemId = BuildRelativeItemId(folderPath, m_assetsRootPath);
+
+        FolderEntry folderEntry = {};
+        folderEntry.itemId = itemId;
+        folderEntry.absolutePath = folderPath;
+        folderEntry.label = PathToUtf8String(folderPath.filename());
+        m_folderEntries.push_back(folderEntry);
+
+        Widgets::UIEditorTreeViewItem item = {};
+        item.itemId = itemId;
+        item.label = folderEntry.label;
+        item.depth = depth;
+        item.forceLeaf = !HasChildDirectories(folderPath);
+        item.leadingIcon = m_folderIcon;
+        m_treeItems.push_back(std::move(item));
+
+        const std::vector<std::filesystem::path> childFolders =
+            CollectSortedChildDirectories(folderPath);
+        for (const std::filesystem::path& childPath : childFolders) {
+            self(self, childPath, depth + 1u);
+        }
+    };
+
+    appendFolderRecursive(appendFolderRecursive, m_assetsRootPath, 0u);
+}
+
+std::vector<std::string> ProjectBrowserModel::CollectCurrentFolderAncestorIds() const {
+    return BuildAncestorFolderIds(m_currentFolderId);
+}
+
+std::vector<std::string> ProjectBrowserModel::BuildAncestorFolderIds(
+    std::string_view itemId) const {
+    std::vector<std::string> ancestors = {};
+    const FolderEntry* folderEntry = FindFolderEntry(itemId);
+    if (folderEntry == nullptr) {
+        return ancestors;
+    }
+
+    std::filesystem::path path = folderEntry->absolutePath;
+    while (true) {
+        ancestors.push_back(BuildRelativeItemId(path, m_assetsRootPath));
+        if (path == m_assetsRootPath) {
+            break;
+        }
+        path = path.parent_path();
+    }
+
+    std::reverse(ancestors.begin(), ancestors.end());
+    return ancestors;
+}
+
+} // namespace XCEngine::UI::Editor::App