Notifier trouble

[ogradyjd]

I'm probably doing something very simple wrong, since I'm a PHP novice. Tell you what - I'll trade an answer to my problem for a quick bash script or Java help, both of which I'm a master of.

My problem is this - I'm trying to create an observer of the "NOTIFY_DOWNLOAD_VIA_SYMLINK___BEGINS" event. I followed the tutorial, but just cant get my class to run when the event fires.

First, I had to change the includes/modules/pages/download/header_php.php file like so:

  if ($link_create_status==true) {
    $zco_notifier->notify('NOTIFY_DOWNLOAD_VIA_SYMLINK___BEGINS', array(DIR_FS_DOWNLOAD_PUBLIC . $tempdir . '/' . $download_link,DIR_FS_DOWNLOAD . $origin_filename) );
    header("RPGBOMB: Crap");
    header("HTTP/1.1 303 See Other");
    zen_redirect(DIR_WS_DOWNLOAD_PUBLIC . $tempdir . '/' . $download_link);
  }

Notice the "$zco_notifier" line? Originally, the notify method was only passing the event name 'NOTIFY_DOWNLOAD_VIA_SYMLINK___BEGINS' as an argument. I added the array of the paths I needed from the download process.

Next. I created the file config.rpgbomb.php in the includes/auto_loaders directory:

<?php
$autoLoadConfig[10][] = array('autoType'=>'class',
                              'loadFile'=>'observers/class.checkoutpdf.php');
$autoLoadConfig[10][] = array('autoType'=>'classInstantiate',
                              'className'=>'checkoutpdf',
                              'objectName'=>'checkoutpdf');
?>

I figure the numbers in there for the load order are ok, as I'm not going to be relying on anything other than what gets passed in through the array.

Last, my class:

<?php
class checkoutpdf extends base {
  function myObserver() {
    global $zco_notifier;
    $zco_notifier->attach($this, array('NOTIFY_DOWNLOAD_VIA_SYMLINK___BEGINS'));
  }

  function update(&$callingClass, $notifier, $paramsArray) {
    #$linkName = $paramsArray[0];
    #header("linkname: " . $linkName);
    #$origName = $paramsArray[1];
    #header("origname: " . $origName);
    header("FACETS: Crap!");
  }
}

?>

I tried to set a header to see if it would appear in the browser response. No dice, but I have no idea if that should work - I just assumed because it's technically procedural code...

So what I need is just a little help over the hump - maybe a way to show that my the class is actually getting notified. I'm figuring once I can see that, my next move is to use the exec backticks to run a bash script I wrote to process the pdf files before the download happens. That brings up a good question - if I try to run a shell script from PHP - what directory am I in? I mean, if I did something like this:

$output=`touch hereiam.txt`; 

...where would the file appear?

Details of my installation are below:

Zen Cart 1.3.8a
Database Patch Level: 1.3.8
v1.3.8 [2009-05-25 19:03:46] (Fresh Installation)
v1.3.8 [2009-05-25 19:03:46] (Fresh Installation)
PHP Version 5.2.6

[DrByte]

1. To trigger a constructor, try changing the first function name to match the class name.
ie:

function myObserver() {

to

function checkoutpdf() {

Or, if you're using PHP 5.x, say function __construct() {

2. To test whether it's firing, add a command that says the following, inside your update() function:

die('It fired!');

3. Your current working directory will be wherever your store's main index.php file resides ... ie: the one the browser called. You could run your exec() script and have it echo its current directory to a file whose path you specify, if you want to get more confirmation of that.

[ogradyjd]

Frickin genius! Figures I'd have a bonehead error in the code. I changed the constructor name to match the class and everything worked out.

One interesting side effect - before I put the "die('It fired!')" line in the update function of my observer class, like so:

  function update(&$callingClass, $notifier, $paramsArray) {
    die('It fired!');
  }

... the pdf would just open up in the browser. With the "die" line, the browser actually brings up the download dialog window. I'll have to check on that.

So what do you want your bash script to do?