Trigger; appending time of line

Posted by Zeno on Wed 15 Mar 2006 12:29 AM — 14 posts, 37,544 views.

Zeno USA Wed 15 Mar 2006 12:29 AM #0

I have a trigger that matches on a string, and sends the string to a notepad window. Works fine, except I'd also like to append the time of the line that it was trigged on. Would I have to make it a script? What would I use for the time?

Nick Gammon Australia Forum Administrator Wed 15 Mar 2006 06:37 AM #1

A small bit of scripting would to it. This example uses Lua as the script language, but other languages would have similar facilities:


<triggers>
  <trigger
   enabled="y"
   match="^.*$"
   regexp="y"
   send_to="12"
   sequence="100"
  >
  <send>AppendToNotepad ("mylog", "%0 " .. os.date ("%H:%M") .. "\\r\\n")
</send>
  </trigger>
</triggers>

Zeno USA Wed 15 Mar 2006 04:51 PM #2

Hm, I'm getting an error. I match on this:

* says (*) '*'

(With no regexp)

It sends:

AppendToNotepad ("AllSays", "%0 %1 said in room %2: %3" os.date ("%H:%M") "\r\n")

I get the error "Expected ')'".

Using commas, I get:

Cannot use parentheses when calling a Sub

Nick Gammon Australia Forum Administrator Wed 15 Mar 2006 07:56 PM #3

This is VBscript, right? - judging by the error message.

In my Lua version I used ".." to concatenate strings. In VBscript you need to use "&" to do that. Also, in VBscript the date function isn't os.date - that is Lua.

You need to look in the VBscript manual for the function that converts the current time to printable. A possibility is simply:

Now ()

Zeno USA Wed 15 Mar 2006 09:18 PM #4

Whoops, forgot to change to Lua. If I try to just run this:

AppendToNotepad ("mylog", "test " .. os.date ("%H:%M") .. "\r\n")

I get this error:

Error number: 0
Event:        Run-time error
Description:  [string "Command line"]:1: attempt to index global `os' (a nil value)
stack traceback:
	[string "Command line"]:1: in main chunk
Called by:    Immediate execution

Nick Gammon Australia Forum Administrator Wed 15 Mar 2006 10:50 PM #5

Later versions of MUSHclient have changed the default "Lua sandbox" in global preferences. Change the line:


  os = nil

to:


  do
    local a, b, c, d, e = os.date, os.time, 
                          os.setlocale, os.clock, os.difftime
    os = {}  -- make new table
    os.date, os.time, os.setlocale, 
    os.clock, os.difftime = a, b, c, d, e  -- restore
  end

David Haley USA Wed 15 Mar 2006 10:52 PM #6

You probably sand-boxed your scripts to remove the os table. I think this is the default, actually.

The sandboxing is in either global preferences or in the world preferences. You'll see something like:

os = nil

What you want to do is something like:

local os = os
os.date = _G.os.date
_G.os = nil

That should make your script work. If it doesn't, try:

local os_date = os.date
os = nil

Then, change your script to call os_date, not os.date.
(The first solution is somewhat more elegant, though, since you keep the os table, you just remove the stuff you don't like.)

EDIT: Or.... do what Nick said, posted while I was writing up mine. :)

Zeno USA Wed 15 Mar 2006 11:02 PM #7

I did what Nick said:

  loadlib = nil   -- no loading DLLs
  io = nil        -- no disk IO
  do
    local a, b, c, d, e = os.date, os.time, 
                          os.setlocale, os.clock, os.difftime
    os = {}  -- make new table
    os.date, os.time, os.setlocale, 
    os.clock, os.difftime = a, b, c, d, e  -- restore
  end

Still get an error:

[string "Command line"]:1: attempt to index global `os' (a nil value)
stack traceback:
	[string "Command line"]:1: in main chunk

Or do I have to restart MC?
[EDIT] Ah, I had to restart MC. *grunt* Had it open for 7 days. =P

I'm looking for docs on this date function, since I'd like to use month and day as well.

David Haley USA Thu 16 Mar 2006 12:36 AM #8

Here you go:
http://www.lua.org/manual/5.0/manual.html#5.7

All the documentation for the os.xyz functions.

Zeno USA Thu 16 Mar 2006 12:45 AM #9

Thanks, although it's odd. Doesn't mention anything about %H or related things.

David Haley USA Thu 16 Mar 2006 01:25 AM #10

In that case it probably uses the standard formats, like in strftime or whatever the C function is called. In fact:

Quote:
If format is not *t, then date returns the date as a string, formatted according to the same rules as the C function strftime.

Zeno USA Thu 16 Mar 2006 01:34 AM #11

Thanks, now I got it.

AppendToNotepad ("AllSays", os.date ("%a %b %d %H:%M:%S %Y") .. " :: %1 said in room %2: %3\r\n")

Nick Gammon Australia Forum Administrator Thu 16 Mar 2006 04:18 AM #12

Date formats are documented in the help file under the Lua "os" functions section, which is exactly the same as this page:

http://www.gammon.com.au/scripts/doc.php?general=lua_os

Quote:

Ah, I had to restart MC. *grunt* Had it open for 7 days.

Must be very reliable then *wink*.

As a matter of fact, reloading scripting would have done it. The sandbox is processed every time the script engine is instantiated.

Zeno USA Thu 16 Mar 2006 04:22 AM #13

Ah, I glanced over your Lua docs but didn't see it.

Quote:
Must be very reliable then *wink*.

Indeed. It takes a few minutes to open World Properties (300k lines+), but it rarely crashes. Actually I'm surprised Windows has stayed stable that long. =P