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Implement player attribute backend (#4155)

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* This backend permit mods to store extra players attributes to a common interface.
* Add the obj:set_attribute(attr, value) Lua call
* Add the obj:get_attribute(attr) Lua call

Examples:
* player:set_attribute("home:home", "10,25,-78")
* player:get_attribute("default:mana")

Attributes are saved as a json in the player file in extended_attributes
key

They are saved only if a modification on the attributes occurs and loaded
when emergePlayer is called (they are attached to PlayerSAO).
This commit is contained in:
Loïc Blot 2017-01-27 08:59:30 +01:00 • committed by GitHub
parent 2a89531071
commit b7a98e9850
9 changed files with 128 additions and 6 deletions
Download patch file Download diff file Expand all files Collapse all files

41
src/script/lua_api/l_object.cpp
View file

@ -1181,6 +1181,45 @@ int ObjectRef::l_get_breath(lua_State *L)
return 1;
}
// set_attribute(self, attribute, value)
int ObjectRef::l_set_attribute(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
PlayerSAO* co = getplayersao(ref);
if (co == NULL) {
return 0;
}
std::string attr = luaL_checkstring(L, 2);
std::string value = luaL_checkstring(L, 3);
if (co->getType() == ACTIVEOBJECT_TYPE_PLAYER) {
co->setExtendedAttribute(attr, value);
}
return 1;
}
// get_attribute(self, attribute)
int ObjectRef::l_get_attribute(lua_State *L)
{
ObjectRef *ref = checkobject(L, 1);
PlayerSAO* co = getplayersao(ref);
if (co == NULL) {
return 0;
}
std::string attr = luaL_checkstring(L, 2);
std::string value = "";
if (co->getExtendedAttribute(attr, &value)) {
lua_pushstring(L, value.c_str());
return 1;
}
return 0;
}
// set_inventory_formspec(self, formspec)
int ObjectRef::l_set_inventory_formspec(lua_State *L)
{
@ -1839,6 +1878,8 @@ const luaL_reg ObjectRef::methods[] = {
luamethod(ObjectRef, set_look_pitch),
luamethod(ObjectRef, get_breath),
luamethod(ObjectRef, set_breath),
luamethod(ObjectRef, get_attribute),
luamethod(ObjectRef, set_attribute),
luamethod(ObjectRef, set_inventory_formspec),
luamethod(ObjectRef, get_inventory_formspec),
luamethod(ObjectRef, get_player_control),

6
src/script/lua_api/l_object.h
View file

@ -226,6 +226,12 @@ private:
// get_breath(self, breath)
static int l_get_breath(lua_State *L);
// set_attribute(self, attribute, value)
static int l_set_attribute(lua_State *L);
// get_attribute(self, attribute)
static int l_get_attribute(lua_State *L);
// set_inventory_formspec(self, formspec)
static int l_set_inventory_formspec(lua_State *L);