Centralize quick and grid UI bridges

src/app_core/grid_ui.h

@@ -35,6 +35,17 @@ struct GridUiPlan {
     bool mutates_grid_state = false;
 };
 
+class GridUiServices {
+public:
+    virtual ~GridUiServices() = default;
+
+    virtual void request_heightmap_pick() = 0;
+    virtual pp::foundation::Status load_heightmap(std::string_view path, bool raise_ground_opacity) = 0;
+    virtual void clear_heightmap(bool updates_preview) = 0;
+    virtual void render_lightmap(bool shows_unsupported_message, bool renders_lightmap) = 0;
+    virtual void commit_heightmap(bool updates_ground_opacity) = 0;
+};
+
 [[nodiscard]] inline pp::foundation::Status validate_grid_texture_resolution(int texture_resolution) noexcept
 {
     if (texture_resolution <= 0 || texture_resolution > 16384) {
@@ -142,4 +153,57 @@ struct GridUiPlan {
     return plan;
 }
 
+[[nodiscard]] inline pp::foundation::Status execute_grid_ui_plan(
+    const GridUiPlan& plan,
+    GridUiServices& services)
+{
+    switch (plan.operation) {
+    case GridUiOperation::request_heightmap_pick:
+        if (!plan.opens_picker) {
+            return pp::foundation::Status::invalid_argument("grid heightmap pick plan must open a picker");
+        }
+        services.request_heightmap_pick();
+        return pp::foundation::Status::success();
+
+    case GridUiOperation::load_heightmap:
+    case GridUiOperation::reload_heightmap:
+        if (!plan.loads_heightmap || plan.path.empty()) {
+            return pp::foundation::Status::invalid_argument("grid heightmap load plan must provide a path");
+        }
+        return services.load_heightmap(plan.path, plan.updates_ground_opacity);
+
+    case GridUiOperation::clear_heightmap:
+        if (!plan.clears_heightmap) {
+            return pp::foundation::Status::invalid_argument("grid heightmap clear plan must clear heightmap state");
+        }
+        services.clear_heightmap(plan.updates_preview);
+        return pp::foundation::Status::success();
+
+    case GridUiOperation::render_lightmap:
+    {
+        const auto texture_status = validate_grid_texture_resolution(plan.texture_resolution);
+        if (!texture_status.ok()) {
+            return texture_status;
+        }
+        const auto sample_status = validate_grid_lightmap_samples(plan.sample_count);
+        if (!sample_status.ok()) {
+            return sample_status;
+        }
+        if (!plan.shows_unsupported_message && !plan.renders_lightmap) {
+            return pp::foundation::Status::success();
+        }
+        services.render_lightmap(plan.shows_unsupported_message, plan.renders_lightmap);
+        return pp::foundation::Status::success();
+    }
+
+    case GridUiOperation::commit_heightmap:
+        if (plan.commits_heightmap) {
+            services.commit_heightmap(plan.updates_ground_opacity);
+        }
+        return pp::foundation::Status::success();
+    }
+
+    return pp::foundation::Status::invalid_argument("unknown grid UI operation");
+}
+
 } // namespace pp::app