From fa34453a1b52040e4100e47dbee37c74f023befd Mon Sep 17 00:00:00 2001
From: David Capello <david@igarastudio.com>
Date: Tue, 4 Sep 2018 17:21:33 -0300
Subject: [PATCH] lua: add app.command.CommandName()

---
 src/app/CMakeLists.txt                |  1 +
 src/app/script/app_command_object.cpp | 95 +++++++++++++++++++++++++++
 src/app/script/engine.cpp             |  2 +
 3 files changed, 98 insertions(+)
 create mode 100644 src/app/script/app_command_object.cpp

diff --git a/src/app/CMakeLists.txt b/src/app/CMakeLists.txt
index 9e12e5a30..a5f597c58 100644
--- a/src/app/CMakeLists.txt
+++ b/src/app/CMakeLists.txt
@@ -148,6 +148,7 @@ if(ENABLE_SCRIPTING)
   endif()
   set(scripting_files
     commands/cmd_run_script.cpp
+    script/app_command_object.cpp
     script/app_object.cpp
     script/cel_class.cpp
     script/cels_class.cpp
diff --git a/src/app/script/app_command_object.cpp b/src/app/script/app_command_object.cpp
new file mode 100644
index 000000000..3e6828e8e
--- /dev/null
+++ b/src/app/script/app_command_object.cpp
@@ -0,0 +1,95 @@
+// Aseprite
+// Copyright (C) 2018  David Capello
+//
+// This program is distributed under the terms of
+// the End-User License Agreement for Aseprite.
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "app/app.h"
+#include "app/commands/command.h"
+#include "app/commands/commands.h"
+#include "app/commands/params.h"
+#include "app/context.h"
+#include "app/script/luacpp.h"
+
+namespace app {
+namespace script {
+
+namespace {
+
+struct AppCommand { };
+
+int Command_call(lua_State* L)
+{
+  app::Context* ctx = App::instance()->context();
+  if (!ctx)
+    return 0;
+
+  auto command = get_ptr<Command>(L, 1);
+  Params params;
+
+  if (lua_istable(L, 2)) {
+    lua_pushnil(L);
+    while (lua_next(L, 2) != 0) {
+      const char* k = lua_tostring(L, -2);
+      if (k) {
+        const char* v = luaL_tolstring(L, -1, nullptr);
+        if (v) {
+          params.set(k, v);
+        }
+        lua_pop(L, 1);
+      }
+      lua_pop(L, 1);
+    }
+  }
+
+  ctx->executeCommand(command, params);
+  return 1;
+}
+
+int AppCommand_index(lua_State* L)
+{
+  const char* id = lua_tostring(L, 2);
+  if (!id)
+    return luaL_error(L, "id in app.command.id() must be a string");
+
+  Command* cmd = Commands::instance()->byId(id);
+  if (!cmd)
+    return luaL_error(L, "command '%s' not found", id);
+
+  push_ptr(L, cmd);
+  return 1;
+}
+
+const luaL_Reg Command_methods[] = {
+  { "__call", Command_call },
+  { nullptr, nullptr }
+};
+
+const luaL_Reg AppCommand_methods[] = {
+  { "__index", AppCommand_index },
+  { nullptr, nullptr }
+};
+
+} // anonymous namespace
+
+DEF_MTNAME(Command);
+DEF_MTNAME(AppCommand);
+
+void register_app_command_object(lua_State* L)
+{
+  REG_CLASS(L, Command);
+  REG_CLASS(L, AppCommand);
+
+  lua_getglobal(L, "app");
+  lua_pushstring(L, "command");
+  push_new<AppCommand>(L);
+  lua_rawset(L, -3);
+  lua_pop(L, 1);
+}
+
+} // namespace script
+} // namespace app
diff --git a/src/app/script/engine.cpp b/src/app/script/engine.cpp
index 399b2904c..1369c3152 100644
--- a/src/app/script/engine.cpp
+++ b/src/app/script/engine.cpp
@@ -80,6 +80,7 @@ int unsupported(lua_State* L)
 
 void register_app_object(lua_State* L);
 void register_app_pixel_color_object(lua_State* L);
+void register_app_command_object(lua_State* L);
 
 void register_cel_class(lua_State* L);
 void register_cels_class(lua_State* L);
@@ -140,6 +141,7 @@ Engine::Engine()
   // Register global app object
   register_app_object(L);
   register_app_pixel_color_object(L);
+  register_app_command_object(L);
 
   // Register constants
   lua_newtable(L);