initial commit

README.md

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+# pulverizer  
+
+
+This mod allows you to pulverize any dug node. 
+Works with sfinv and default formspec.  
+(do not use it as storage for your item, you will lose your item on disconnect!)
+
+
+Depends on default and sfinv.
+
+
+Code licensed as GPLv3 (see file LICENSE)  
+Media licensed as CC by SA 3.0 (for more details: http://creativecommons.org/licenses/by-sa/3.0/)  

depends.txt

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+default
+sfinv

init.lua

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+pulverizer = {
+    item = {},
+    sfinv_offset = 3.6,
+    default_offset = 2,
+    enabled = true,
+}
+
+pulverizer.after_dig_nodes = {
+    ["default:stone"] = "default:cobble",
+    ["default:dirt_with_grass"] = "default:dirt",
+}
+
+pulverizer.get_addon = function(offset)
+    return "image[0.1,"..(offset+0.1)..";0.8,0.8;pulverizer.png]"
+        .. "list[detached:survival_pulverizer;main;0,"..offset..";1,1;]"
+end
+
+minetest.create_detached_inventory("survival_pulverizer", {
+	on_put = function(inv, listname, index, stack, player)
+		local size = inv:get_size(listname)
+        local list = inv:get_list(listname)
+        local itemstack = inv:get_stack(listname, 1)
+        pulverizer.item[player:get_player_name()] = itemstack
+	end,
+    on_take = function(inv, listname, index, stack, player)
+        if inv:get_stack(listname, 1):is_empty() then
+            pulverizer.item[player:get_player_name()] = nil
+        end
+    end
+}):set_size("main", 1)
+
+if pulverizer.enabled then
+    if sfinv.enabled then
+        local get_old = sfinv.pages["sfinv:crafting"].get
+        sfinv.pages["sfinv:crafting"].get = function(self, player, context)
+            return get_old(self, player, context) .. pulverizer.get_addon(pulverizer.sfinv_offset)
+        end
+    else
+        minetest.register_on_joinplayer(function(player)
+            local old_formspec = player:get_inventory_formspec()
+            player:set_inventory_formspec(old_formspec .. pulverizer.get_addon(pulverizer.default_offset))
+        end)
+    end
+    
+    minetest.register_on_dignode(function(pos, oldnode, digger)
+        if not digger:is_player() then return end
+        
+        local unwanted_item = pulverizer.item[digger:get_player_name()]
+        if unwanted_item then
+            local unwanted_item_name = unwanted_item:get_name()
+            if pulverizer.after_dig_nodes[oldnode.name] then
+                digger:get_inventory():remove_item("main", {name=pulverizer.after_dig_nodes[oldnode.name], count=1, wear=0, metadata=""})
+            elseif unwanted_item_name == oldnode.name then
+                digger:get_inventory():remove_item("main", {name=unwanted_item_name, count=1, wear=0, metadata=""})
+            end
+        end
+    end)
+
+    minetest.register_on_leaveplayer(function(player)
+        pulverizer.item[player:get_player_name()] = nil
+    end)
+end