Create a coroutine to run plans

luprex/core/cpp/viewer.hpp

@@ -0,0 +1,46 @@
+#ifndef VIEWER_HPP
+#define VIEWER_HPP
+
+#include "world.hpp"
+#include "animqueue.hpp"
+#include "gui.hpp"
+#include <vector>
+#include <string>
+#include <memory>
+
+class Viewer {
+private:
+    std::unique_ptr<World> world_;
+
+public:
+    Viewer();
+    ~Viewer();
+
+    // Snapshot/rollback the lua state (temporary hack)
+    void snapshot() { world_->lua_snap_.snapshot(); }
+    void rollback() { world_->lua_snap_.rollback(); }
+    
+    // Get the lua state for interaction.
+    //
+    lua_State *state() { return world_->state(); }
+
+    // Get the player ID of the current player.
+    //
+    int64_t get_player_id();
+
+    // Get the list of tangibles near the player.
+    //
+    std::vector<int64_t> get_near() { return world_->get_near(1, 100); }
+    
+    // Get the specified tangible.
+    //
+    const Tangible *tangible_get(int64_t id) { return world_->tangible_get(id); }
+
+    // Update the GUI for the specified sprite.
+    //
+    // The gui passed in will be overwritten.
+    //
+    void update_gui(int64_t id, Gui *g);
+};
+
+#endif // VIEWER_HPP