dragonfireclient/builtin/client/chatcommands.lua

-- Minetest: builtin/client/chatcommands.lua

core.register_on_sending_chat_message(function(message)
	if message:sub(1,2) == ".." then
		return false
	end

	local first_char = message:sub(1,1)
	if first_char == "/" or first_char == "." then
		core.display_chat_message(core.gettext("issued command: ") .. message)
	end

	if first_char ~= "." then
		return false
	end

	local cmd, param = string.match(message, "^%.([^ ]+) *(.*)")
	param = param or ""

	if not cmd then
		core.display_chat_message(core.gettext("-!- Empty command"))
		return true
	end

	local cmd_def = core.registered_chatcommands[cmd]
	if cmd_def then
		core.set_last_run_mod(cmd_def.mod_origin)
		local _, result = cmd_def.func(param)
		if result then
			core.display_chat_message(result)
		end
	else
		core.display_chat_message(core.gettext("-!- Invalid command: ") .. cmd)
	end

	return true
end)

function core.run_server_chatcommand(cmd, param)
	core.send_chat_message("/" .. cmd .. " " .. param)
end