Centralize legacy document open bridge

src/app_core/document_session.h

@@ -55,6 +55,16 @@ enum class DocumentOpenPlanAction {
     prompt_import_ppbr,
 };
 
+class DocumentOpenServices {
+public:
+    virtual ~DocumentOpenServices() = default;
+
+    virtual void prompt_import_abr(const DocumentOpenRoute& route) = 0;
+    virtual void prompt_import_ppbr(const DocumentOpenRoute& route) = 0;
+    virtual void open_project_now(const DocumentOpenRoute& route) = 0;
+    virtual void prompt_discard_unsaved_project(const DocumentOpenRoute& route) = 0;
+};
+
 struct DocumentFileTarget {
     std::string name;
     std::string directory;
@@ -102,6 +112,41 @@ struct NewDocumentPlan {
     return DocumentOpenPlanAction::open_project_now;
 }
 
+[[nodiscard]] inline pp::foundation::Status execute_document_open_plan(
+    DocumentOpenPlanAction action,
+    const DocumentOpenRoute& route,
+    DocumentOpenServices& services)
+{
+    switch (action) {
+    case DocumentOpenPlanAction::open_project_now:
+        if (route.kind != DocumentOpenKind::open_project) {
+            return pp::foundation::Status::invalid_argument("open-project action requires a project route");
+        }
+        services.open_project_now(route);
+        return pp::foundation::Status::success();
+    case DocumentOpenPlanAction::prompt_discard_unsaved_project:
+        if (route.kind != DocumentOpenKind::open_project) {
+            return pp::foundation::Status::invalid_argument("discard prompt requires a project route");
+        }
+        services.prompt_discard_unsaved_project(route);
+        return pp::foundation::Status::success();
+    case DocumentOpenPlanAction::prompt_import_abr:
+        if (route.kind != DocumentOpenKind::import_abr) {
+            return pp::foundation::Status::invalid_argument("ABR import prompt requires an ABR route");
+        }
+        services.prompt_import_abr(route);
+        return pp::foundation::Status::success();
+    case DocumentOpenPlanAction::prompt_import_ppbr:
+        if (route.kind != DocumentOpenKind::import_ppbr) {
+            return pp::foundation::Status::invalid_argument("PPBR import prompt requires a PPBR route");
+        }
+        services.prompt_import_ppbr(route);
+        return pp::foundation::Status::success();
+    }
+
+    return pp::foundation::Status::invalid_argument("unknown document open action");
+}
+
 [[nodiscard]] constexpr CloseRequestDecision plan_close_request(
     bool has_unsaved_changes,
     bool close_prompt_already_open) noexcept