Charity modification to e-commerce checkout

Hi,

I followed the above instructions carefully and added the code to the bottom of the donate.module as described (found in modules/ecommerce/contrib/donate). I was adding to a 5.x site and the last post of code above from redsmartie just worked for me.

I took the liberty of making a few additions to this to make it slightly clearer to the end user. Using the code below you can configure the message before they click "Add Gift Aid" and after, it also make the text bold to prompt them to click!

function donate_menu($may_cache) {
  $items  = array();
  $access = user_access('administer store');

  if ($may_cache) {
    $items[] = array(
      'path' => 'admin/ecsettings/donate',
      'title' => 'donate',
      'callback' => 'drupal_get_form',
      'callback arguments' => array('donate_settings'),
      'access' => $access,
      'type' => MENU_NORMAL_ITEM,
    );
  }
  return $items;
}

function donate_settings() {
  drupal_set_title('Donate module settings');
  $form['donate_gift_aid_add_text'] = array(
    '#type' => 'textfield',
    '#title' => t('Gift Aid Add text'),
    '#default_value' => variable_get('donate_gift_aid_add_text', ''),
    '#description' => t('Enter descriptive text to be displayed beneath gift aid checkbox.'),
  );
  $form['donate_gift_aid_remove_text'] = array(
    '#type' => 'textfield',
    '#title' => t('Gift Aid Remove text'),
    '#default_value' => variable_get('donate_gift_aid_remove_text', ''),
    '#description' => t('Enter descriptive text to be displayed beneath gift aid checkbox.'),
  );
  return system_settings_form($form);
}

function donate_checkoutapi(&$txn, $op, $arg3 = NULL, $arg4 = NULL) {
  if ($txn == 'donate' && $op == 'review') {
    return 'donate';
  }

  if (is_array($txn)) {
    // Check to see if we have a donation in the cart
    foreach ($txn->items as $no => $key) {
      if ($key->ptype == 'donate') {
        $display = TRUE;
      }
    }
    if (!$display) {
      return;
    }
  }

  switch ($op) {
    case 'review':
      $form['donate_gift_aid'] = array(
        '#type' => 'item',
        '#description' => ($txn->misc['gift_aid'] ? variable_get('donate_gift_aid_remove_text', '') : '<span style="font-size:1.1em; font-weight:bold;">' . variable_get('donate_gift_aid_add_text', '') . '</span>') . '<br/><br/>',
      );
      $form['submit'] = array(
        '#type' => 'submit',
        '#value' => ($txn->misc['gift_aid'] ? t('Remove') : t('Add')) . ' Gift Aid',
      );
      return $form;
      break;
    case 'review_submit':
      if ($_POST['op'] == 'Add Gift Aid') {
        $misc = new StdClass;
        $misc->type = 'donate';
        $misc->description = 'Gift Aid';
        $txn->misc['gift_aid'] = $misc;
      }
      elseif ($_POST['op'] == 'Remove Gift Aid') {
        foreach ($txn->misc as $no => $key) {
          if ($key->type == 'donate') {
            unset($txn->misc[$no]);
          }
        }
      }
      elseif ($_POST['op'] == 'Place your order') {
        // Do nothing...  Was a breakpoint for testing
      }
      break;
  }
}

function theme_donate_review_form($form) {
  $output.= '<div class="container-inline">';
  $output.= drupal_render($form);
  $output.= '</div>';
  return theme('box', t('Include Gift Aid?'), $output);
}

Thanks pobster for writing this.

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