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feat: add UnitCanAttack and UnitCanCooperate for targeting addons

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UnitCanAttack(unit, otherUnit): returns true if otherUnit is hostile
(attackable). UnitCanCooperate(unit, otherUnit): returns true if
otherUnit is friendly (can receive beneficial spells).

Used by nameplate addons for coloring and by targeting addons for
filtering hostile/friendly units.
This commit is contained in:
Kelsi 2026-03-21 10:19:29 -07:00
parent a4ff315c81
commit 5d6376f3f1
1 changed files with 36 additions and 0 deletions
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36
src/addons/lua_engine.cpp
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@ -540,6 +540,40 @@ static int lua_UnitDetailedThreatSituation(lua_State* L) {
return 5;
}
// UnitCanAttack(unit, otherUnit) → boolean
static int lua_UnitCanAttack(lua_State* L) {
auto* gh = getGameHandler(L);
if (!gh) { lua_pushboolean(L, 0); return 1; }
const char* uid1 = luaL_checkstring(L, 1);
const char* uid2 = luaL_checkstring(L, 2);
std::string u1(uid1), u2(uid2);
for (char& c : u1) c = static_cast<char>(std::tolower(static_cast<unsigned char>(c)));
for (char& c : u2) c = static_cast<char>(std::tolower(static_cast<unsigned char>(c)));
uint64_t g1 = resolveUnitGuid(gh, u1);
uint64_t g2 = resolveUnitGuid(gh, u2);
if (g1 == 0 || g2 == 0 || g1 == g2) { lua_pushboolean(L, 0); return 1; }
// Check if unit2 is hostile to unit1
auto* unit2 = resolveUnit(L, uid2);
if (unit2 && unit2->isHostile()) {
lua_pushboolean(L, 1);
} else {
lua_pushboolean(L, 0);
}
return 1;
}
// UnitCanCooperate(unit, otherUnit) → boolean
static int lua_UnitCanCooperate(lua_State* L) {
auto* gh = getGameHandler(L);
if (!gh) { lua_pushboolean(L, 0); return 1; }
(void)luaL_checkstring(L, 1); // unit1 (unused — cooperation is based on unit2's hostility)
const char* uid2 = luaL_checkstring(L, 2);
auto* unit2 = resolveUnit(L, uid2);
if (!unit2) { lua_pushboolean(L, 0); return 1; }
lua_pushboolean(L, !unit2->isHostile());
return 1;
}
// UnitCreatureFamily(unit) → familyName or nil
static int lua_UnitCreatureFamily(lua_State* L) {
auto* gh = getGameHandler(L);
@ -3284,6 +3318,8 @@ void LuaEngine::registerCoreAPI() {
{"UnitIsTapped", lua_UnitIsTapped},
{"UnitIsTappedByPlayer", lua_UnitIsTappedByPlayer},
{"UnitIsTappedByAllThreatList", lua_UnitIsTappedByAllThreatList},
{"UnitCanAttack", lua_UnitCanAttack},
{"UnitCanCooperate", lua_UnitCanCooperate},
{"UnitCreatureFamily", lua_UnitCreatureFamily},
{"UnitOnTaxi", lua_UnitOnTaxi},
{"UnitThreatSituation", lua_UnitThreatSituation},