Route command conversion through app core

src/app_core/command_convert.h

@@ -0,0 +1,97 @@
+#pragma once
+
+#include "foundation/result.h"
+
+#include <string>
+#include <string_view>
+#include <utility>
+#include <vector>
+
+namespace pp::app {
+
+enum class CommandConvertStep {
+    apply_renderer_state,
+    create_canvas,
+    open_project,
+    export_equirectangular,
+};
+
+struct CommandConvertPlan {
+    std::string project_path;
+    std::string output_path;
+    int canvas_resolution = 0;
+    std::vector<CommandConvertStep> steps;
+};
+
+class CommandConvertServices {
+public:
+    virtual ~CommandConvertServices() = default;
+
+    virtual void apply_renderer_state() = 0;
+    virtual void create_canvas(int canvas_resolution) = 0;
+    virtual void open_project(std::string_view project_path) = 0;
+    virtual void export_equirectangular(std::string_view output_path) = 0;
+};
+
+[[nodiscard]] inline pp::foundation::Result<CommandConvertPlan> plan_command_convert(
+    std::string_view project_path,
+    std::string_view output_path,
+    int canvas_resolution)
+{
+    if (project_path.empty()) {
+        return pp::foundation::Result<CommandConvertPlan>::failure(
+            pp::foundation::Status::invalid_argument("convert project path must not be empty"));
+    }
+
+    if (output_path.empty()) {
+        return pp::foundation::Result<CommandConvertPlan>::failure(
+            pp::foundation::Status::invalid_argument("convert output path must not be empty"));
+    }
+
+    if (canvas_resolution < 1) {
+        return pp::foundation::Result<CommandConvertPlan>::failure(
+            pp::foundation::Status::invalid_argument("convert canvas resolution must be positive"));
+    }
+
+    CommandConvertPlan plan;
+    plan.project_path = std::string(project_path);
+    plan.output_path = std::string(output_path);
+    plan.canvas_resolution = canvas_resolution;
+    plan.steps = {
+        CommandConvertStep::apply_renderer_state,
+        CommandConvertStep::create_canvas,
+        CommandConvertStep::open_project,
+        CommandConvertStep::export_equirectangular,
+    };
+    return pp::foundation::Result<CommandConvertPlan>::success(std::move(plan));
+}
+
+[[nodiscard]] inline pp::foundation::Status execute_command_convert_plan(
+    const CommandConvertPlan& plan,
+    CommandConvertServices& services)
+{
+    if (plan.project_path.empty() || plan.output_path.empty() || plan.canvas_resolution < 1) {
+        return pp::foundation::Status::invalid_argument("convert plan is malformed");
+    }
+
+    for (const auto step : plan.steps) {
+        switch (step) {
+        case CommandConvertStep::apply_renderer_state:
+            services.apply_renderer_state();
+            break;
+        case CommandConvertStep::create_canvas:
+            services.create_canvas(plan.canvas_resolution);
+            break;
+        case CommandConvertStep::open_project:
+            services.open_project(plan.project_path);
+            break;
+        case CommandConvertStep::export_equirectangular:
+            services.export_equirectangular(plan.output_path);
+            break;
+        }
+    }
+
+    return pp::foundation::Status::success();
+}
+
+} // namespace pp::app