main/app: started to move things to app

Started implementing App, as the actual implementation, that is, to
pull out all the stuff that is actually the application and only have
glue code reside in main.

Signed-off-by: Marcus Fritzsch <marcus_fritzsch@mentor.com>

1 files changed, 52 insertions, 0 deletions

diff --git a/src/app.hpp b/src/app.hpp
new file mode 100644
index 0000000..a3108b3
--- /dev/null
+++ b/src/app.hpp
@@ -0,0 +1,52 @@
+//
+// Created by mfritzsc on 7/11/17.
+//
+
+#ifndef TMCAGLWM_APP_HPP
+#define TMCAGLWM_APP_HPP
+
+#include <json.hpp>
+#include <experimental/optional>
+
+namespace wm {
+
+    using std::experimental::optional;
+    using std::experimental::nullopt;
+
+    template <typename E, typename T>
+    struct result {
+        optional<E> e;
+        optional<T> t;
+
+        bool is_ok() const { return this->t != nullopt; }
+        bool is_err() const { return this->e != nullopt; }
+        T unwrap() { return this->t.value(); }
+    };
+
+    template <typename E, typename T>
+    struct result<E, T> Err(E e) { return result<E, T>{e, nullopt}; }
+
+    template <typename E, typename T>
+    struct result<E, T> Ok(T t) { return result<E, T>{nullopt, t}; }
+
+    using json = nlohmann::json;
+
+    struct App {
+        struct API {
+            struct App *app;
+
+            result<char const *, json> debug_status() const;
+            result<char const *, json> debug_layers() const;
+            result<char const *, json> debug_surfaces() const;
+
+            result<char const *, json> register_surface(uint32_t appid, uint32_t surfid);
+        };
+
+        struct API api;
+
+        App();
+    };
+
+} // namespace wm
+
+#endif //TMCAGLWM_APP_HPP