From 9e0f41f00f9d046c0d14669d26fb39b6a9cfe49a Mon Sep 17 00:00:00 2001
From: Kevin Mok <kevin.mok@live.ca>
Date: Sat, 27 Jul 2019 07:08:36 -0400
Subject: [PATCH] Server intercepts non-existent commands

Before reaching mod function. No way to call chat command functions with
set parameters.
---
 init.lua | 100 +++++++++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 89 insertions(+), 11 deletions(-)

diff --git a/init.lua b/init.lua
index 0367b40..9cdce81 100644
--- a/init.lua
+++ b/init.lua
@@ -1,15 +1,50 @@
+aliases = {}
+
+-- http://lua-users.org/wiki/CopyTable
+function deepcopy(orig)
+    local orig_type = type(orig)
+    local copy
+    if orig_type == 'table' then
+        copy = {}
+        for orig_key, orig_value in next, orig, nil do
+            copy[deepcopy(orig_key)] = deepcopy(orig_value)
+        end
+        setmetatable(copy, deepcopy(getmetatable(orig)))
+    else -- number, string, boolean, etc
+        copy = orig
+    end
+    return copy
+end
+
 -- https://github.com/Uberi/Minetest-WorldEdit/blob/master/worldedit_shortcommands/init.lua
-function alias(short, orig)
-	if not minetest.chatcommands[orig] then
-		minetest.log("error", "custom_aliases: original command " .. orig .. " does not exist")
-		return true
-	end
-	if minetest.chatcommands[short] then
-		minetest.log("error", "custom_aliases: alias " .. short .. " already exists")
-		return true
-	end
-	minetest.register_chatcommand(short, minetest.chatcommands[orig])
-	return false
+-- function alias(short, orig, params)
+    -- -- params = params or ""
+    -- local def = minetest.chatcommands[orig]
+    -- -- minetest.log(params or (orig .. ": no params"))
+    -- minetest.log("verbose", orig)
+    -- -- minetest.debug(orig)
+    -- if params then
+        -- def = deepcopy(def)
+        -- def.params = params
+    -- end
+	-- if not minetest.chatcommands[orig] then
+		-- minetest.log("error", "custom_aliases: original command " .. orig .. " does not exist")
+		-- return true
+	-- end
+	-- if minetest.chatcommands[short] then
+		-- minetest.log("error", "custom_aliases: alias " .. short .. " already exists")
+		-- return true
+	-- end
+	-- -- minetest.register_chatcommand(short, minetest.chatcommands[orig])
+	-- minetest.register_chatcommand(short, def)
+	-- return false
+-- end
+
+function alias(short, orig, param)
+    aliases[short] = {
+        orig = orig,
+        param = param or ""
+    }
 end
 
 alias("gim", "giveme")
@@ -18,3 +53,46 @@ alias("grm", "grantme")
 -- alias("h", "home")
 alias("sd", "shutdown")
 alias("t", "teleport")
+alias("t0", "teleport", "0 0 0")
+
+minetest.register_on_chat_message(function(name, message)
+    -- minetest.chat_send_player(name, "Alias")
+    minetest.chat_send_player(name, "Alias")
+
+	if message:sub(1,1) ~= "/" then
+		return
+	end
+
+	local cmd, param = string.match(message, "^/([^ ]+) *(.*)")
+	if not cmd then
+		-- minetest.chat_send_player(name, "-!- Empty command")
+		return true
+	end
+
+	param = param or ""
+
+	local cmd_def = minetest.registered_chatcommands[cmd]
+	local alias_def = aliases[cmd]
+	if not cmd_def and alias_def then
+        minetest.chat_send_player(name, "Alias " .. cmd .. "= " .. alias_def.orig)
+        cmd_def = minetest.registered_chatcommands[alias_def.orig]
+        if not cmd_def then
+            minetest.chat_send_player(name, "-!- Invalid alias: " .. cmd)
+            return true
+        end
+
+        local has_privs, missing_privs = minetest.check_player_privs(name, cmd_def.privs)
+        if has_privs then
+            minetest.set_last_run_mod(cmd_def.mod_origin)
+            local success, message = cmd_def.func(name, param)
+            if message then
+                minetest.chat_send_player(name, message)
+            end
+        else
+            minetest.chat_send_player(name, "You don't have permission"
+                    .. " to run this command (missing privileges: "
+                    .. table.concat(missing_privs, ", ") .. ")")
+        end
+        return true  -- Handled chat message
+	end
+end)