Extract app document session decisions

src/app.cpp

@@ -6,6 +6,7 @@
 #include "node_progress_bar.h"
 #include "mp4enc.h"
 #include "app_core/document_route.h"
+#include "app_core/document_session.h"
 #include "renderer_gl/opengl_capabilities.h"
 
 #ifdef __APPLE__
@@ -238,7 +239,8 @@ void App::open_document(std::string path)
             });
             ActionManager::clear();
         };
-        if (!Canvas::I->m_unsaved)
+        const auto open_decision = pp::app::plan_project_open(Canvas::I->m_unsaved);
+        if (open_decision == pp::app::ProjectOpenDecision::open_now)
         {
             open_action();
         }
@@ -256,9 +258,12 @@ void App::open_document(std::string path)
 bool App::request_close()
 {
     static bool dialog_already_opened = false;
-    if (!Canvas::I->m_unsaved)
+    const auto close_decision = pp::app::plan_close_request(
+        Canvas::I->m_unsaved,
+        dialog_already_opened);
+    if (close_decision == pp::app::CloseRequestDecision::close_now)
         return true;
-    if (!dialog_already_opened)
+    if (close_decision == pp::app::CloseRequestDecision::show_unsaved_prompt)
     {
         auto* m = layout[main_id]->add_child<NodeMessageBox>();
         m->m_title->set_text("Unsaved document");

src/app_core/document_session.cpp

@@ -0,0 +1 @@
+#include "app_core/document_session.h"

src/app_core/document_session.h

@@ -0,0 +1,36 @@
+#pragma once
+
+namespace pp::app {
+
+enum class ProjectOpenDecision {
+    open_now,
+    prompt_discard_unsaved,
+};
+
+enum class CloseRequestDecision {
+    close_now,
+    show_unsaved_prompt,
+    wait_for_existing_prompt,
+};
+
+[[nodiscard]] constexpr ProjectOpenDecision plan_project_open(bool has_unsaved_changes) noexcept
+{
+    return has_unsaved_changes
+        ? ProjectOpenDecision::prompt_discard_unsaved
+        : ProjectOpenDecision::open_now;
+}
+
+[[nodiscard]] constexpr CloseRequestDecision plan_close_request(
+    bool has_unsaved_changes,
+    bool close_prompt_already_open) noexcept
+{
+    if (!has_unsaved_changes) {
+        return CloseRequestDecision::close_now;
+    }
+
+    return close_prompt_already_open
+        ? CloseRequestDecision::wait_for_existing_prompt
+        : CloseRequestDecision::show_unsaved_prompt;
+}
+
+}