1 files changed, 103 insertions, 0 deletions
diff --git a/src/game/shared/item_registry.cc b/src/game/shared/item_registry.cc
new file mode 100644
index 0000000..1263201
--- /dev/null
+++ b/src/game/shared/item_registry.cc
@@ -0,0 +1,103 @@
+#include "shared/pch.hh"
+
+#include "shared/item_registry.hh"
+
+#include "core/crc64.hh"
+
+#include "shared/voxel_registry.hh"
+
+std::unordered_map<std::string, ItemInfoBuilder> item_registry::builders = {};
+std::unordered_map<std::string, item_id> item_registry::names = {};
+std::vector<std::shared_ptr<ItemInfo>> item_registry::items = {};
+
+ItemInfoBuilder::ItemInfoBuilder(const char* name)
+{
+    prototype.name = name;
+    prototype.texture = std::string();
+    prototype.place_voxel = NULL_VOXEL_ID;
+    prototype.cached_texture = nullptr;
+}
+
+ItemInfoBuilder& ItemInfoBuilder::set_texture(const char* texture)
+{
+    prototype.texture = texture;
+    prototype.cached_texture = nullptr;
+    return *this;
+}
+
+ItemInfoBuilder& ItemInfoBuilder::set_place_voxel(voxel_id place_voxel)
+{
+    prototype.place_voxel = place_voxel;
+    return *this;
+}
+
+item_id ItemInfoBuilder::build(void) const
+{
+    const auto it = item_registry::names.find(prototype.name);
+
+    if(it != item_registry::names.cend()) {
+        spdlog::warn("item_registry: cannot build {}: name already present", prototype.name);
+        return it->second;
+    }
+
+    auto new_info = std::make_shared<ItemInfo>();
+    new_info->name = prototype.name;
+    new_info->texture = prototype.texture;
+    new_info->place_voxel = prototype.place_voxel;
+    new_info->cached_texture = nullptr;
+
+    item_registry::items.push_back(new_info);
+    item_registry::names.insert_or_assign(prototype.name, static_cast<item_id>(item_registry::items.size()));
+
+    return static_cast<item_id>(item_registry::items.size());
+}
+
+ItemInfoBuilder& item_registry::construct(const char* name)
+{
+    const auto it = item_registry::builders.find(name);
+
+    if(it != item_registry::builders.cend()) {
+        return it->second;
+    } else {
+        return item_registry::builders.emplace(name, ItemInfoBuilder(name)).first->second;
+    }
+}
+
+ItemInfo* item_registry::find(const char* name)
+{
+    const auto it = item_registry::names.find(name);
+
+    if(it != item_registry::names.cend()) {
+        return item_registry::find(it->second);
+    } else {
+        return nullptr;
+    }
+}
+
+ItemInfo* item_registry::find(const item_id item)
+{
+    if((item != NULL_ITEM_ID) && (item <= item_registry::items.size())) {
+        return item_registry::items[item - 1].get();
+    } else {
+        return nullptr;
+    }
+}
+
+void item_registry::purge(void)
+{
+    item_registry::builders.clear();
+    item_registry::names.clear();
+    item_registry::items.clear();
+}
+
+std::uint64_t item_registry::calcualte_checksum(void)
+{
+    std::uint64_t result = 0;
+
+    for(const auto& info : item_registry::items) {
+        result = crc64::get(info->name, result);
+        result += static_cast<std::uint64_t>(info->place_voxel);
+    }
+
+    return result;
+}