By beanerboy on

I am newish to drupal... and have a code question perhaps someone has already done.
This question is for D6, but I would also like to see some sample code for D7 as well... I am not sure which version of DRUPAL I will end up using
I have a NODE type in D6.
It has a lot of file field of images ( that have been cropped).

IMAGE1 field_image1
IMAGE2 field_image2
IMAGE3 field_image3

I would like to create a button somewhere on the node, that will do the following...
It will create a zip file of all three images, but put into separate directories...

res/image1/default.png
res/image2/default.png
res/image3/default.png

so when the zip file is downloaded, it will create a file structure that looks like the above.

If you leave the code snippet, can you calso explain how I would pu thte putton on the page? should I use rules, or a write a custom module? or something else?
Perhaps there is a button control where i can put this code already in D6 and D7?

thanks

⋅ Categories: Drupal 6.x, Drupal 7.x

Comments

rohnjeynolds’s picture

rohnjeynolds commented

I'm inferring here that you want the button to be visible when the node is being viewed, as opposed to edited? I don't know of a contrib module that does exactly what you're describing, maybe others do. I would approach it as a custom module that uses Forms API to insert a form with a submit button into the node body, and put the zipping and dowloading in the submit hook for that form. Here comes some ugly pseudo-code for imaginary, untested module ZipButton. I think hook_nodeapi() would be the way to get the form and button into the node but I guess it could also be done with hook_preprocess in a module or (less desirably) the theme:

function zipbutton_nodeapi($op, &$node) {
  if ($node->type == 'your type' && $op == 'view') {
    $node->body .= "\n" . '<div id="zipbutton_form">' . drupal_get_form(zipbutton_form($node)) . '</div>' . "\n";
  }
}

function zipbutton_form($node) {
  $form = array(
      'image1' => array (
        '#type' => 'value',
        '#default_value' => $node->image1_field[0]['value'];
      ),
      'image2' => array (
        '#type' => 'value',
        '#default_value' => $node->image2_field[0]['value'];
      ),
      'image3' => array (
        '#type' => 'value',
        '#default_value' => $node->image3_field[0]['value'];
      ),
      'submit' => array(
         '#type' => 'submit', 
         '#value' => t('Download images'),
      ),
  );
  return $form;
}

function zipbutton_form_submit($form, &$form_state) {
    ...
    here you'd maybe get the file paths from $form_state['values']
    or a value you could use to do a light query against the files table to get the paths
    then create the zip and push it to the user with header magic.
    ...
}