Move material methods into separate api object

init.lua

@@ -55,14 +55,16 @@ local biomes = loadfile(modpath .. "/biome_api.lua") (util);
 
 local scanner = loadfile(modpath .. "/scanner.lua") (map_data, chunk);
 local maps = loadfile(modpath .. "/map_api.lua") (map_data, chunk, scanner);
+local materials = loadfile(modpath .. "/material_api.lua") ();
 local markers = loadfile(modpath .. "/marker_api.lua") (marker_lookup);
 local map_formspec = loadfile(modpath .. "/map_formspec.lua") (map_data, gui, skin, util, biomes, markers);
 local map_item = loadfile(modpath .. "/items.lua") (chunk, marker_lookup, gui, skin, audio, maps, map_formspec);
 loadfile(modpath .. "/commands.lua") (chunk, audio, map_formspec);
-loadfile(modpath .. "/table.lua") (gui, skin, audio, maps, map_item);
+loadfile(modpath .. "/table.lua") (gui, skin, audio, maps, materials, map_item);
 
 cartographer.skin = skin;
 cartographer.biomes = biomes;
 cartographer.markers = markers;
 cartographer.maps = maps;
 cartographer.map_item = map_item;
+cartographer.materials = materials;

table.lua

@@ -1,4 +1,4 @@
-local gui, gui_skin, audio, maps, map_item = ...;
+local gui, gui_skin, audio, maps, materials, map_item = ...;
 
 local MAP_SIZE = 40;
 local SCALE_SMALL = 1;
@@ -6,9 +6,6 @@ local SCALE_MEDIUM = 2;
 local SCALE_LARGE = 4;
 local SCALE_HUGE = 8;
 
-local materials_by_name = {};
-local materials_by_group = {};
-
 -- Get the material cost for the given map scale and detail level
 -- scale: The map scale
 -- detail: The detail level
@@ -90,38 +87,6 @@ local function get_copy_material_cost(meta)
     };
 end
 
--- Get the converted material value of the given itemstack
--- stack: The itemstack to convert
---
--- Returns a table with the material values
-local function get_material_value(stack)
-    local item_name = stack:get_name();
-    local item_count = stack:get_count();
-
-    for name,mats in pairs(materials_by_name) do
-        if name == item_name then
-            return {
-                paper = (mats.paper or 0) * item_count,
-                pigment = (mats.pigment or 0) * item_count,
-            }
-        end
-    end
-
-    for group,mats in pairs(materials_by_group) do
-        if minetest.get_item_group(item_name, group) ~= 0 then
-            return {
-                paper = (mats.paper or 0) * item_count,
-                pigment = (mats.pigment or 0) * item_count,
-            }
-        end
-    end
-
-    return {
-        paper = 0,
-        pigment = 0,
-    };
-end
-
 local fs = {};
 
 -- Draw a 1px thick horizontal separator formspec element
@@ -380,7 +345,7 @@ end
 -- Returns a formspec string
 function fs.convert(x, y, pos, skin)
     local meta = minetest.get_meta(pos);
-    local value = get_material_value(meta:get_inventory():get_stack("input", 1));
+    local value = materials.get_stack_value(meta:get_inventory():get_stack("input", 1));
 
     return gui.container {
         x = x,
@@ -694,7 +659,7 @@ minetest.register_on_player_receive_fields(function(player, name, fields)
             local inv = meta:get_inventory();
             local stack = inv:get_stack("input", 1);
 
-            local value = get_material_value(stack);
+            local value = materials.get_stack_value(stack);
 
             if value.paper + value.pigment > 0 then
                 meta:set_int("paper", meta:get_int("paper") + value.paper);
@@ -955,23 +920,3 @@ minetest.register_node("cartographer:advanced_table", {
     on_metadata_inventory_put = table_on_items_changed,
     on_metadata_inventory_take = table_on_items_changed,
 });
-
-function cartographer.register_map_material_name(name, material, value)
-    if materials_by_name[name] then
-        materials_by_name[name][material] = value or 1;
-    else
-        materials_by_name[name] = {
-            [material] = value or 1,
-        };
-    end
-end
-
-function cartographer.register_map_material_group(name, material, value)
-    if materials_by_group[name] then
-        materials_by_group[name][material] = value or 1;
-    else
-        materials_by_group[name] = {
-            [material] = value or 1,
-        };
-    end
-end