Plan app dialog factories

src/app_core/app_dialog.h

@@ -0,0 +1,78 @@
+#pragma once
+
+#include "foundation/result.h"
+
+#include <string>
+#include <string_view>
+
+namespace pp::app {
+
+enum class AppDialogKind {
+    progress,
+    message,
+    input,
+};
+
+struct AppProgressDialogPlan {
+    std::string title;
+    int total = 0;
+    int count = 0;
+    float progress_fraction = 0.0F;
+};
+
+struct AppMessageDialogPlan {
+    std::string title;
+    std::string message;
+    std::string ok_caption = "Ok";
+    bool show_cancel = false;
+};
+
+struct AppInputDialogPlan {
+    std::string title;
+    std::string field_name;
+    std::string ok_caption = "Ok";
+};
+
+[[nodiscard]] inline AppProgressDialogPlan plan_app_progress_dialog(
+    std::string_view title,
+    int total) noexcept
+{
+    return {
+        std::string(title),
+        total < 0 ? 0 : total,
+        0,
+        0.0F,
+    };
+}
+
+[[nodiscard]] inline AppMessageDialogPlan plan_app_message_dialog(
+    std::string_view title,
+    std::string_view message,
+    bool show_cancel)
+{
+    return {
+        std::string(title),
+        std::string(message),
+        "Ok",
+        show_cancel,
+    };
+}
+
+[[nodiscard]] inline pp::foundation::Result<AppInputDialogPlan> plan_app_input_dialog(
+    std::string_view title,
+    std::string_view field_name,
+    std::string_view ok_caption)
+{
+    if (ok_caption.empty()) {
+        return pp::foundation::Result<AppInputDialogPlan>::failure(
+            pp::foundation::Status::invalid_argument("input dialog ok caption must not be empty"));
+    }
+
+    return pp::foundation::Result<AppInputDialogPlan>::success({
+        std::string(title),
+        std::string(field_name),
+        std::string(ok_caption),
+    });
+}
+
+} // namespace pp::app