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#include "shared/item/items.hh"
namespace shared {
namespace item {
item_t make_item(const item::type_t& type,
const std::uint32_t& quantity) noexcept {
if (type >= block::type_offset) {
return std::make_shared<block>(type, quantity);
}
// TODO others
return std::make_shared<block>(type, quantity);
}
item_t make_item(const enum shared::world::block::type& type,
const std::uint32_t& quantity) noexcept {
return std::make_shared<block>(type, quantity);
}
item_t make_item(const proto::item& item) noexcept {
const auto type = item.type();
constexpr auto offset = shared::item::block::type_offset;
if (type >= offset) {
const auto block =
static_cast<enum shared::world::block::type>(type - offset);
return make_item(block, item.quantity());
}
return make_item(static_cast<item::type_t>(item.type()), item.quantity());
}
items::items(const proto::item_array& proto) noexcept {
const auto length = static_cast<unsigned long>(proto.items_size());
for (auto i = 0ul; i < length; ++i) {
const auto& item = proto.items().at(static_cast<int>(i));
const auto index = item.index();
this->contents[index] = make_item(item);
}
}
// Annoying logic because we have to add into existing first, then start
// adding new stacks after.
bool items::maybe_add(const item::type_t& type, const std::uint32_t& quantity,
const make_item_func_t& func) noexcept {
const auto stack_size = item::get_max_stack(type);
std::uint32_t added = 0;
const auto get_existing =
std::ranges::find_if(this->contents, [&](const auto& item) {
if (item == nullptr) {
return false;
}
if (item->type != type) {
return false;
}
if (item->quantity >= stack_size) {
return false;
}
return true;
});
for (auto it = get_existing; get_existing != std::end(this->contents);
it = get_existing) {
const auto addition =
std::min(quantity - added, stack_size - (*it)->quantity);
(*it)->quantity += addition;
added += addition;
if (added != quantity) {
continue;
}
return true;
}
for (auto& item : this->contents) {
if (item != nullptr) {
continue;
}
const auto addition = std::min(quantity - added, stack_size);
item = func(type, addition);
added += addition;
if (added != quantity) {
continue;
}
return true;
}
return false;
}
bool items::maybe_remove(const item::type_t& type,
const std::uint32_t& quantity) noexcept {
const auto existing_it =
std::ranges::find_if(this->contents, [&type](const auto& i) {
if (i == nullptr) {
return false;
}
return type == i->get_type();
});
if (existing_it == std::end(this->contents)) {
return false;
}
auto& existing = (*existing_it)->quantity;
if (existing > quantity) {
existing -= quantity;
return true;
}
if (existing == quantity) {
(*existing_it) = nullptr;
return true;
}
const auto diff = quantity - existing;
(*existing_it) = nullptr;
return this->maybe_remove(type, diff);
}
void items::pack(proto::item_array* const proto) const noexcept {
const auto items = proto->mutable_items();
for (auto i = 0ul; i < std::size(this->contents); ++i) {
const auto& item = contents[i];
if (item == nullptr) {
continue;
}
proto::item proto_item;
item->pack(&proto_item, static_cast<std::uint32_t>(i));
items->Add(std::move(proto_item));
}
}
void items::increment(const std::uint32_t& index,
const make_item_func_t& func) noexcept {
auto& item = this->contents[index];
if (item == nullptr) {
return;
}
if (item->quantity < shared::item::item::get_max_stack(item->type)) {
++item->quantity;
return;
}
this->maybe_add(item->type, 1, func);
}
void items::decrement(const std::uint32_t& index) noexcept {
auto& item = this->contents[index];
if (item == nullptr) {
return;
}
item->quantity -= 1;
if (item->quantity == 0) {
item = nullptr;
}
}
} // namespace item
} // namespace shared
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