Centralize legacy brush package export

src/app_core/brush_package_export.h

@@ -0,0 +1,63 @@
+#pragma once
+
+#include "foundation/result.h"
+
+#include <string>
+#include <string_view>
+
+namespace pp::app {
+
+struct BrushPackageExportRequest {
+    std::string author;
+    std::string email;
+    std::string url;
+    std::string description;
+    std::string destination_path;
+    bool export_data = false;
+    bool has_header_image = false;
+};
+
+class BrushPackageExportServices {
+public:
+    virtual ~BrushPackageExportServices() = default;
+
+    virtual void export_brush_package(std::string_view path, const BrushPackageExportRequest& request) = 0;
+};
+
+[[nodiscard]] inline pp::foundation::Status validate_brush_package_export_path(std::string_view path) noexcept
+{
+    if (path.empty()) {
+        return pp::foundation::Status::invalid_argument("brush package export path must not be empty");
+    }
+
+    return pp::foundation::Status::success();
+}
+
+[[nodiscard]] inline pp::foundation::Status validate_brush_package_export_request(
+    std::string_view path,
+    const BrushPackageExportRequest& request) noexcept
+{
+    (void)request;
+    const auto path_status = validate_brush_package_export_path(path);
+    if (!path_status.ok()) {
+        return path_status;
+    }
+
+    return pp::foundation::Status::success();
+}
+
+[[nodiscard]] inline pp::foundation::Status execute_brush_package_export(
+    std::string_view path,
+    const BrushPackageExportRequest& request,
+    BrushPackageExportServices& services)
+{
+    const auto status = validate_brush_package_export_request(path, request);
+    if (!status.ok()) {
+        return status;
+    }
+
+    services.export_brush_package(path, request);
+    return pp::foundation::Status::success();
+}
+
+} // namespace pp::app