Centralize legacy document session bridge

src/app_core/document_session.h

@@ -65,6 +65,31 @@ public:
     virtual void prompt_discard_unsaved_project(const DocumentOpenRoute& route) = 0;
 };
 
+class CloseRequestServices {
+public:
+    virtual ~CloseRequestServices() = default;
+
+    virtual void request_close_now() = 0;
+    virtual void show_unsaved_close_prompt() = 0;
+};
+
+class DocumentSaveServices {
+public:
+    virtual ~DocumentSaveServices() = default;
+
+    virtual void show_save_dialog() = 0;
+    virtual void save_existing_document() = 0;
+    virtual void save_document_version() = 0;
+};
+
+class DocumentWorkflowServices {
+public:
+    virtual ~DocumentWorkflowServices() = default;
+
+    virtual void continue_workflow_now() = 0;
+    virtual void prompt_save_before_continue() = 0;
+};
+
 struct DocumentFileTarget {
     std::string name;
     std::string directory;
@@ -160,6 +185,24 @@ struct NewDocumentPlan {
         : CloseRequestDecision::show_unsaved_prompt;
 }
 
+[[nodiscard]] inline pp::foundation::Status execute_close_request_decision(
+    CloseRequestDecision decision,
+    CloseRequestServices& services)
+{
+    switch (decision) {
+    case CloseRequestDecision::close_now:
+        services.request_close_now();
+        return pp::foundation::Status::success();
+    case CloseRequestDecision::show_unsaved_prompt:
+        services.show_unsaved_close_prompt();
+        return pp::foundation::Status::success();
+    case CloseRequestDecision::wait_for_existing_prompt:
+        return pp::foundation::Status::success();
+    }
+
+    return pp::foundation::Status::invalid_argument("unknown close request decision");
+}
+
 [[nodiscard]] constexpr DocumentSaveDecision plan_document_save(
     bool is_new_document,
     bool has_unsaved_changes,
@@ -191,6 +234,27 @@ struct NewDocumentPlan {
     return DocumentSaveDecision::no_op;
 }
 
+[[nodiscard]] inline pp::foundation::Status execute_document_save_decision(
+    DocumentSaveDecision decision,
+    DocumentSaveServices& services)
+{
+    switch (decision) {
+    case DocumentSaveDecision::no_op:
+        return pp::foundation::Status::success();
+    case DocumentSaveDecision::show_save_dialog:
+        services.show_save_dialog();
+        return pp::foundation::Status::success();
+    case DocumentSaveDecision::save_existing:
+        services.save_existing_document();
+        return pp::foundation::Status::success();
+    case DocumentSaveDecision::save_version:
+        services.save_document_version();
+        return pp::foundation::Status::success();
+    }
+
+    return pp::foundation::Status::invalid_argument("unknown document save decision");
+}
+
 [[nodiscard]] constexpr DocumentWorkflowDecision plan_document_workflow(
     bool has_canvas,
     bool has_unsaved_changes) noexcept
@@ -204,6 +268,24 @@ struct NewDocumentPlan {
         : DocumentWorkflowDecision::continue_now;
 }
 
+[[nodiscard]] inline pp::foundation::Status execute_document_workflow_decision(
+    DocumentWorkflowDecision decision,
+    DocumentWorkflowServices& services)
+{
+    switch (decision) {
+    case DocumentWorkflowDecision::unavailable:
+        return pp::foundation::Status::success();
+    case DocumentWorkflowDecision::continue_now:
+        services.continue_workflow_now();
+        return pp::foundation::Status::success();
+    case DocumentWorkflowDecision::prompt_save_before_continue:
+        services.prompt_save_before_continue();
+        return pp::foundation::Status::success();
+    }
+
+    return pp::foundation::Status::invalid_argument("unknown document workflow decision");
+}
+
 [[nodiscard]] inline pp::foundation::Result<DocumentFileTarget> make_document_file_target(
     std::string_view work_directory,
     std::string_view document_name)