Run JavaScript if a file is created

[EoF]

Might be wise to incorporate some AJAX into this, no? Having PHP check the file, etc and then pass the results / message back to JS.

[KirAsh4]

Not necessarily:
MM² module --> node_helper --> php --> node_helper --> MM² module

[ooom416354]

@KirAsh4 This is awesome!

I would just put this in my JS file, right? I’m currently sending the following command through Tasker to the Pi so I think I’m good.

touch curr-train.txt

[KirAsh4]

Earlier you mentioned you using PHP, so I kept it in the loop. Use node_helper to call the PHP script. Let the PHP script check for the file and report back to node_helper which in turn reports to the module.

[ooom416354]

@KirAsh4 OK, so my PHP script is actually index.php, it’s effectively the page that loads and is my Mirror. In that file I have a reference to the JS file which runs the mta code.

<script src="js/mm-mta.js"></script>

So would I put the following in the PHP page? (sorry if I sound dumb here)

var prev_datestamp = 0;
var expire_time = 15 * 60 * 1000; // 15 minutes

// run every five minutes
if (file exists) {
  if (file.datestamp > previous_datestamp) {

   <script src="js/mm-mta.js"></script>

    previous_datestamp = file.datestamp;
  } else if (now > file.datestamp + expire_time) {

  <script src="https://code.jquery.com/jquery-1.10.2.js"></script>
  <script> 
      $("#mta").empty();
  </script>
}
}

[ooom416354]

@KirAsh4 for reference here’s the full index.php file

index.php

[KirAsh4]

Oy, why do it that way … your index.php will never get updated if there’s an upstream change in the code (because we use index.html). You should use the existing infrastructure in MM². Create a new module, have it display in a specific region on the mirror. Every 5 minutes, have the module refresh by doing a call to its node_helper. The node_helper can be a simply python script that checks the specific file in question and reports back to the module.

I thought the PHP script was doing something … it’s not in this case. You don’t need PHP at all for this.

Some places to look for coding ideas:
MM² Module Development Documentation
Look at how modules such as the calendar and newsfeed implement a node_helper which does the background tasks

You could still use PHP to do the file checking for you, but to me that’s a bit of an unnecessary overhead.

[ooom416354]

@KirAsh4 LOL - I’m just lost these days with all of this stuff. I should stick to my DB work.

Let me see what I can do with the module documentation, it would be a good experience anyway to learn.

[ooom416354]

@KirAsh4 Just out of curiosity, if I were to add the code you provided into the PHP file, would i need to bracket it with <?php then add the code here?>

[KirAsh4]

This is hard to answer because I don’t know what your PHP file looks like. I don’t know if you are echo-ing HTML data, or using HEREDOC? I’m flying blind here … (as much fun as that could be)