add inventory.get_uses, inventory.use, item.uses & update base:bazalt_breaker

res/content/base/items/bazalt_breaker.json

@@ -1,4 +1,5 @@
 {
     "icon-type": "sprite",
-    "icon": "items:bazalt_breaker"
+    "icon": "items:bazalt_breaker",
+    "uses": 100
 }

res/content/base/scripts/bazalt_breaker.lua

@@ -1,3 +1,4 @@
-function on_block_break_by(x, y, z, p)
+function on_block_break_by(x, y, z, pid)
     block.set(x, y, z, 0, 0)
+    inventory.use(player.get_inventory(pid))
 end

res/scripts/stdmin.lua

@@ -497,3 +497,28 @@ end
 function file.prefix(path)
     return path:match("^([^:]+)")
 end
+
+function inventory.get_uses(invid, slot)
+    local uses = inventory.get_data(invid, slot, "uses")
+    if uses == nil then
+        return item.uses(inventory.get(invid, slot))
+    end
+    return uses
+end
+
+
+function inventory.use(invid, slot)
+    local itemid, count = inventory.get(invid, slot)
+    if itemid == nil then
+        return
+    end
+    local item_uses = inventory.get_uses(invid, slot)
+    if item_uses == nil then
+        return
+    end
+    if item_uses == 1 then
+        inventory.set(invid, slot, itemid, count - 1)
+    elseif item_uses > 1 then
+        inventory.set_data(invid, slot, "uses", item_uses - 1)
+    end
+end

src/items/ItemDef.hpp

@@ -38,7 +38,7 @@ struct ItemDef {
     uint8_t emission[4] {0, 0, 0, 0};
 
     /// @brief Default item uses count
-    int16_t uses = 100;
+    int16_t uses = -1;
 
     ItemIconType iconType = ItemIconType::SPRITE;
     std::string icon = "blocks:notfound";

src/logic/scripting/lua/libs/libitem.cpp

@@ -80,6 +80,13 @@ static int l_emission(lua::State* L) {
     return 0;
 }
 
+static int l_uses(lua::State* L) {
+    if (auto def = get_item_def(L, 1)) {
+        return lua::pushinteger(L, def->uses);
+    }
+    return 0;
+}
+
 const luaL_Reg itemlib[] = {
     {"index", lua::wrap<l_index>},
     {"name", lua::wrap<l_name>},
@@ -90,4 +97,6 @@ const luaL_Reg itemlib[] = {
     {"placing_block", lua::wrap<l_placing_block>},
     {"model_name", lua::wrap<l_model_name>},
     {"emission", lua::wrap<l_emission>},
-    {NULL, NULL}};
+    {"uses", lua::wrap<l_uses>},
+    {NULL, NULL}
+};