function commerce_stock_form_alter in Commerce Stock 7

Same name and namespace in other branches

1. 7.2 commerce_stock.module \commerce_stock_form_alter()

Implements hook_form_alter().

Alters the add-to-cart form to show out-of-stock items and add a validator.

File

./commerce_stock.module, line 46

Allow commerce products to have stock levels associated with their SKU

Code

function commerce_stock_form_alter(&$form, &$form_state, $form_id) {
  if (strpos($form_id, "commerce_cart_add_to_cart_form") === 0) {
    $stock = array();
    $stock_enabled = array();

    // check if product is disabled
    if (isset($form['submit']['#attributes']['disabled']) && $form['submit']['#attributes']['disabled'] == 'disabled') {
      return;
    }

    // Check to see if product has options (multiple products using
    // the default dropdown)
    if (isset($form['product_id']['#options'])) {
      $options = $form['product_id']['#options'];

      // Stock validation (for options):
      // Stock validation only true if stock field exist
      // @todo: for version 2 we need a better way to determine if
      // stock enabled and not rely on the existence of the stock field
      $stock_validation = FALSE;
      foreach ($options as $key => $value) {
        $product = commerce_product_load($key);
        $product_wrapper = entity_metadata_wrapper('commerce_product', $product);
        if (!empty($product_wrapper->commerce_stock)) {
          $stock_validation = TRUE;

          // Set stock array
          $stock[$key] = $product_wrapper->commerce_stock
            ->value();

          // set stock enabled array
          if (isset($product_wrapper->commerce_stock_override) && $product_wrapper->commerce_stock_override
            ->value() == 1) {
            $stock_enabled[$key] = FALSE;
          }
          else {
            $stock_enabled[$key] = TRUE;
          }
        }
        else {

          // stock is disabled or the product has no value (we will handle it as 0)
          // @todo if stock field had a default of 0 this wont be needed
          $stock_enabled[$key] = TRUE;
          $stock[$key] = 0;
        }
      }

      // Stock validation actions (for options):
      if ($stock_validation) {

        // set "out of stock"  Message
        foreach ($options as $key => $value) {
          if ($stock_enabled[$key] && $stock[$key] <= 0) {
            $form['product_id']['#options'][$key] .= ' - ' . t('Out of Stock');
          }
        }

        // Set validation
        $form['#after_build'][] = 'commerce_stock_form_after_build';
        $form['product_id']['#element_validate'][] = 'commerce_stock_option_validate';
        $form['product_id']['#stock'] = $stock;
        $form['product_id']['#stock_enabled'] = $stock_enabled;
      }
    }
    elseif (isset($form['product_id']['#value'])) {
      $product = commerce_product_load($form['product_id']['#value']);
      $product_wrapper = entity_metadata_wrapper('commerce_product', $product);

      // Add validation to the add to cart
      $form['#validate'][] = 'commerce_stock_add_to_cart_validate';
      if (isset($product_wrapper->commerce_stock)) {
        if (!(isset($product_wrapper->commerce_stock_override) && $product_wrapper->commerce_stock_override
          ->value() == 1)) {
          if ($product_wrapper->commerce_stock
            ->value() <= 0) {
            $form['submit']['#value'] = t('Out of Stock');
            $form['submit']['#disabled'] = TRUE;
            $form['submit']['#attributes'] = array(
              'class' => array(
                'out-of-stock',
              ),
            );
          }
        }
      }
    }
  }
  elseif ($form_id == 'commerce_checkout_form_checkout') {

    // Add validate function to the checkout form
    $form['buttons']['continue']['#validate'][] = 'commerce_stock_checkout_form_validate';
  }
  elseif ($form_id == 'commerce_checkout_form_review') {

    // Add validate function to the review form
    // /@todo: would be good to prompt the user with some contextual info
    // as he was about to pay
    $form['buttons']['continue']['#validate'][] = 'commerce_stock_checkout_form_validate';
  }
}