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-- Minetest: builtin/common/chatcommands.lua
-- For server-side translations (if INIT == "game")
-- Otherwise, use core.gettext
local S = core.get_translator("__builtin")
core.registered_chatcommands = {}
-- Interpret the parameters of a command, separating options and arguments.
-- Input: parameters of a command
-- Returns: opts, args
-- opts is a string of option letters, or false on error
-- args is an array with the non-option arguments in order, or an error message
-- Example: for this command line:
-- /command a b -cd e f -g
-- the function would receive:
-- a b -cd e f -g
-- and it would return:
-- "cdg", {"a", "b", "e", "f"}
-- Negative numbers are taken as arguments. Long options (--option) are
-- currently rejected as reserved.
local function getopts(param)
local opts = ""
local args = {}
for match in param:gmatch("%S+") do
if match:byte(1) == 45 then -- 45 = '-'
local second = match:byte(2)
if second == 45 then
return false, S("Flags beginning with -- are reserved")
elseif second and (second < 48 or second > 57) then -- 48 = '0', 57 = '9'
opts = opts .. match:sub(2)
else
-- numeric, add it to args
args[#args + 1] = match
end
else
args[#args + 1] = match
end
end
return opts, args
end
function core.register_chatcommand(cmd, def)
def = def or {}
def.params = def.params or ""
def.description = def.description or ""
def.privs = def.privs or {}
def.mod_origin = core.get_current_modname() or "??"
core.registered_chatcommands[cmd] = def
end
function core.unregister_chatcommand(name)
if core.registered_chatcommands[name] then
core.registered_chatcommands[name] = nil
else
core.log("warning", "Not unregistering chatcommand " ..name..
" because it doesn't exist.")
end
end
function core.override_chatcommand(name, redefinition)
local chatcommand = core.registered_chatcommands[name]
assert(chatcommand, "Attempt to override non-existent chatcommand "..name)
for k, v in pairs(redefinition) do
rawset(chatcommand, k, v)
end
core.registered_chatcommands[name] = chatcommand
end
local function format_help_line(cmd, def)
local cmd_marker = INIT == "client" and "." or "/"
local msg = core.colorize("#00ffff", cmd_marker .. cmd)
if def.params and def.params ~= "" then
msg = msg .. " " .. def.params
end
if def.description and def.description ~= "" then
msg = msg .. ": " .. def.description
end
return msg
end
local function do_help_cmd(name, param)
local opts, args = getopts(param)
if not opts then
return false, args
end
if #args > 1 then
return false, S("Too many arguments, try using just /help <command>")
end
local use_gui = INIT ~= "client" and core.get_player_by_name(name)
use_gui = use_gui and not opts:find("t")
if #args == 0 and not use_gui then
local cmds = {}
for cmd, def in pairs(core.registered_chatcommands) do
if INIT == "client" or core.check_player_privs(name, def.privs) then
cmds[#cmds + 1] = cmd
end
end
table.sort(cmds)
local msg
if INIT == "game" then
msg = S("Available commands: @1",
table.concat(cmds, " ")) .. "\n"
.. S("Use '/help <cmd>' to get more "
.. "information, or '/help all' to list "
.. "everything.")
else
msg = core.gettext("Available commands: ")
.. table.concat(cmds, " ") .. "\n"
.. core.gettext("Use '.help <cmd>' to get more "
.. "information, or '.help all' to list "
.. "everything.")
end
return true, msg
elseif #args == 0 or (args[1] == "all" and use_gui) then
core.show_general_help_formspec(name)
return true
elseif args[1] == "all" then
local cmds = {}
for cmd, def in pairs(core.registered_chatcommands) do
if INIT == "client" or core.check_player_privs(name, def.privs) then
cmds[#cmds + 1] = format_help_line(cmd, def)
end
end
table.sort(cmds)
local msg
if INIT == "game" then
msg = S("Available commands:")
else
msg = core.gettext("Available commands:")
end
return true, msg.."\n"..table.concat(cmds, "\n")
elseif INIT == "game" and args[1] == "privs" then
if use_gui then
core.show_privs_help_formspec(name)
return true
end
local privs = {}
for priv, def in pairs(core.registered_privileges) do
privs[#privs + 1] = priv .. ": " .. def.description
end
table.sort(privs)
return true, S("Available privileges:").."\n"..table.concat(privs, "\n")
else
local cmd = args[1]
local def = core.registered_chatcommands[cmd]
if not def then
local msg
if INIT == "game" then
msg = S("Command not available: @1", cmd)
else
msg = core.gettext("Command not available: ") .. cmd
end
return false, msg
else
return true, format_help_line(cmd, def)
end
end
end
if INIT == "client" then
core.register_chatcommand("help", {
params = core.gettext("[all | <cmd>]"),
description = core.gettext("Get help for commands"),
func = function(param)
return do_help_cmd(nil, param)
end,
})
else
core.register_chatcommand("help", {
params = S("[all | privs | <cmd>] [-t]"),
description = S("Get help for commands or list privileges (-t: output in chat)"),
func = do_help_cmd,
})
end
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