Merge pull request 'Fix #1842 (several fixes for mcl_item_id)' (#1843) from NO11/MineClone2:item_id_fixes into master

Reviewed-on: https://git.minetest.land/MineClone2/MineClone2/pulls/1843

mods/HELP/mcl_item_id/API.md

@@ -0,0 +1,24 @@
+# mcl_item_id
+Show the item ID of an item in the description.
+With this API, you can register a different name space than "mineclone" for your mod.
+
+## mcl_item_id.set_mod_namespace(modname, namespace)
+Set a name space for all items in a mod.
+
+* param1: the modname
+* param2: (optional) string of the desired name space, if nil, it is the name of the mod
+
+## mcl_item_id.get_mod_namespace(modname)
+Get the name space of a mod registered with mcl_item_id.set_mod_namespace(modname, namespace).
+
+* param1: the modname
+
+### Examples:
+
+The name of the mod is "mod" which registered an item called "mod:itemname".
+
+* mcl_item_id.set_mod_namespace("mod", "mymod") will show "mymod:itemname" in the description of "mod:itemname"
+* mcl_item_id.set_mod_namespace(minetest.get_current_modname()) will show "mod:itemname" in the description of "mod:itemname"
+* mcl_item_id.get_mod_namespace(minetest.get_current_modname()) will return "mod" 
+
+(If no namespace is set by a mod, mcl_item_id.get_mod_namespace(minetest.get_current_modname()) will return "mineclone")

mods/HELP/mcl_item_id/init.lua

@@ -1,6 +1,26 @@
+mcl_item_id = {
+    mod_namespaces = {},
+}
+
 local game = "mineclone"
 
+function mcl_item_id.set_mod_namespace(modname, namespace)
+    local namespace = namespace or modname
+    mcl_item_id.mod_namespaces[modname] = namespace
+end
+
+function mcl_item_id.get_mod_namespace(modname)
+    local namespace = mcl_item_id.mod_namespaces[modname]
+    if namespace then
+        return namespace
+    else
+        return game
+    end
+end
+
 local same_id = {
+    enchanting = { "table" },
+    experience = { "bottle" },
     heads = { "skeleton", "zombie", "creeper", "wither_skeleton" },
     mobitems = { "rabbit", "chicken" },
     walls = {
@@ -18,9 +38,11 @@ local same_id = {
 
 tt.register_snippet(function(itemstring)
     local def = minetest.registered_items[itemstring]
-    local desc = def.description
     local item_split = itemstring:find(":")
-    local new_id = game .. itemstring:sub(item_split)
+    local id_string = itemstring:sub(item_split)
+    local id_modname = itemstring:sub(1, item_split - 1)
+    local new_id = game .. id_string
+    local mod_namespace = mcl_item_id.get_mod_namespace(id_modname)
     for mod, ids in pairs(same_id) do
         for _, id in pairs(ids) do
             if itemstring == "mcl_" .. mod .. ":" .. id  then
@@ -28,12 +50,13 @@ tt.register_snippet(function(itemstring)
             end
         end
     end
-    if new_id ~= game .. ":book_enchanted" then
+    if mod_namespace ~= game then
+        new_id = mod_namespace .. id_string
+    end
+    if mod_namespace ~= id_modname then
         minetest.register_alias_force(new_id, itemstring)
     end
     if minetest.settings:get_bool("mcl_item_id_debug", false) then
         return new_id, "#555555"
     end
 end)
-
-minetest.register_alias_force(game .. ":book_enchanted", "mcl_enchanting:book_enchanted")