bool City::expend_resource(Resource res, int amount)
{
if (!has_resource(res, amount)) {
return false;
}
resources[res] -= amount;
return true;
}
bool City::expend_resource(Resource_amount res)
{
if (!has_resource(res)) {
return false;
}
resources[res.type] -= res.amount;
return true;
}
bool City::has_resources(std::vector<Resource_amount> res_used)
{
for (int i = 0; i < res_used.size(); i++) {
if (!has_resource( res_used[i] )) {
return false;
}
}
return true;
}
bool GatherAbility::can_invoke(Unit &to_modify, const Command &cmd) {
if (cmd.has_unit()) {
Unit &target = *cmd.unit();
return &to_modify != &target &&
to_modify.location &&
to_modify.has_attribute(attr_type::gatherer) &&
has_resource(target);
}
return false;
}
bool City::has_resources(std::map<Resource,int> res_used)
{
for (std::map<Resource,int>::iterator it = res_used.begin();
it != res_used.end();
it++) {
if (!has_resource(it->first, it->second)) {
return false;
}
}
return true;
}
bool AttackAbility::can_invoke(Unit &to_modify, const Command &cmd) {
if (cmd.has_unit()) {
Unit &target = *cmd.unit();
bool target_is_resource = has_resource(target);
return &to_modify != &target &&
to_modify.location &&
target.location &&
target.location->is_placed() &&
to_modify.has_attribute(attr_type::attack) &&
has_hitpoints(target) &&
(is_enemy(to_modify, target) || target_is_resource) &&
(cmd.has_flag(command_flag::attack_res) == target_is_resource);
}
return false;
}
bool City::has_resource(Resource_amount res)
{
return has_resource(res.type, res.amount);
}