Gideon,
Awesome name, BTW.
To get a condition to react to something from within a list, you have to create a custom rule condition. Take heart! You can copy how we do this in Drupal Commerce:
<?php
/**
* Implements hook_rules_condition_info().
*/
function commerce_order_rules_condition_info() {
//...
$conditions['commerce_order_contains_product'] = array(
'label' => t('Order contains a particular product'),
'parameter' => array(
'commerce_order' => array(
'type' => 'commerce_order',
'label' => t('Order'),
'description' => t('The order whose line items should be checked for the specified product. If the specified order does not exist, the comparison will act as if it is against a quantity of 0.'),
),
'product_id' => array(
'type' => 'text',
'label' => t('Product SKU'),
'description' => t('The SKU of the product to look for on the order.'),
),
'operator' => array(
'type' => 'text',
'label' => t('Operator'),
'description' => t('The operator used with the quantity value below to compare the quantity of the specified product on the order.'),
'default value' => '>=',
'options list' => 'commerce_numeric_comparison_operator_options_list',
'restriction' => 'input',
),
'value' => array(
'type' => 'text',
'label' => t('Quantity'),
'default value' => '1',
'description' => t('The value to compare against the quantity of the specified product on the order.'),
),
),
'group' => t('Commerce Order'),
'callbacks' => array(
'execute' => 'commerce_order_rules_contains_product',
),
);
}
?>
And then you create a function that goes through all the line items in an order and return a true or false...
<?php
/**
* Condition callback: checks to see if a particular product exists on an order
* in the specified quantity.
*/
function commerce_order_rules_contains_product($order, $sku, $operator, $value) {
$products = array($sku => 0);
// If we actually received a valid order...
if (!empty($order)) {
$order_wrapper = entity_metadata_wrapper('commerce_order', $order);
// Populate the array of the quantities of the products on the order.
foreach ($order_wrapper->commerce_line_items as $delta => $line_item_wrapper) {
if (in_array($line_item_wrapper->type->value(), commerce_product_line_item_types())) {
// Extract a product ID and quantity from the line item.
$line_item_sku = $line_item_wrapper->commerce_product->sku->value();
$quantity = $line_item_wrapper->quantity->value();
// Update the product's quantity value.
if (empty($products[$line_item_sku])) {
$products[$line_item_sku] = $quantity;
}
else {
$products[$line_item_sku] += $quantity;
}
}
}
}
// Make a quantity comparison based on the operator.
switch ($operator) {
case '<':
return $products[$sku] < $value;
case '<=':
return $products[$sku] <= $value;
case '=':
return $products[$sku] == $value;
case '>=':
return $products[$sku] >= $value;
case '>':
return $products[$sku] > $value;
}
return FALSE;
}
?>
