implement first draft of an API; weird bug when registering the crafts

api.lua

@@ -21,6 +21,6 @@ function streets.register_road_surface(nodename, nodedef)
   streets.api.register_road_surfaces[nodename] = nodedef
 end
 
-function streets.register_road_marking(markingname, texture)
-  streets.api.register_road_markings[markingname] = texture
+function streets.register_road_marking(markingdef)
+  streets.api.register_road_markings[markingdef.suffix] = markingdef
 end

api_register_all.lua

@@ -6,20 +6,49 @@
 ]]
 
 minetest.after(0, function()
-  for nodename, nodedef in pairs(streets.api.register_road_surfaces) do
-    -- Register the node
-    minetest.register_node(nodename, nodedef)
-    -- Register all markings for this node
-    for markingname, markingtexture in pairs(streets.api.register_road_markings) do
-      minetest.register_node(nodename .. "_" .. markingname, {
-        tiles = {nodedef.tiles[1] .. "^" .. markingtexture, nodedef.tiles[1]},
-        groups = nodedef.groups
+  local surface_list = streets.api.register_road_surfaces
+  local marking_list = streets.api.register_road_markings
+  -- Loop thorugh the list of surfaces
+  for surface_name, surface_definition in pairs(surface_list) do
+    -- Register the surface itself (e.g. plain asphalt)
+    minetest.register_node(surface_name, surface_definition)
+    -- Register the craft for this surface
+    minetest.register_craft(surface_definition.craft)
+    -- Loop through the list of markings
+    for marking_suffix, marking_data in pairs(marking_list) do
+      -- Collect required data for node defintion
+      local nn = surface_name .. "_" .. marking_suffix
+      local description = surface_definition.description .. " " .. marking_data.friendly_suffix
+      local tiles = {surface_definition.tiles[1] .. "^" .. marking_data.overlay, surface_definition.tiles[1]}
+      local groups = surface_definition.groups
+      local sounds = surface_definition.sounds
+      -- Replace placeholders in craft recipe
+      local craft = marking_data.craft
+      local replacement = surface_name:sub(2, -1)
+      if craft[1][1] == "?" then craft[1][1] = replacement end
+      if craft[1][2] == "?" then craft[1][2] = replacement end
+      if craft[1][3] == "?" then craft[1][3] = replacement end
+      if craft[2][1] == "?" then craft[2][1] = replacement end
+      if craft[2][2] == "?" then craft[2][2] = replacement end
+      if craft[2][3] == "?" then craft[2][3] = replacement end
+      if craft[3][1] == "?" then craft[3][1] = replacement end
+      if craft[3][2] == "?" then craft[3][2] = replacement end
+      if craft[3][3] == "?" then craft[3][3] = replacement end
+      -- Register the combination of surface and marking
+      minetest.register_node(nn, {
+        description = description,
+        tiles = tiles,
+        groups = groups,
+        sounds = sounds,
+        paramtype = "light",
+        paramtype2 = "facedir"
+      })
+      local craft_output = nn:sub(2, -1)
+      -- Register the craft for this node
+      minetest.register_craft({
+        output = craft_output,
+        recipe = craft
       })
-    end
-
-    -- Register the craft
-    if nodedef.craft ~= nil then
-      minetest.register_craft(nodedef.craft)
     end
   end
 end)

streets_roadmarkings/init.lua

@@ -5,4 +5,13 @@
   Category: Roads
 ]]
 
-streets.register_road_marking("line_dashed", "streets_line_dashed.png")
+streets.register_road_marking({
+  suffix = "line_dashed",
+  friendly_suffix = "dashed line",
+  overlay = "streets_line_dashed.png",
+  craft = {
+    {"?", "dye:white", "?"},
+    {"?", "?", "?"},
+    {"?", "dye:white", "?"}
+  }
+})