basic_cart.cart.inc in Basic cart 7

Basic cart shopping cart implementation functions.

File

basic_cart.cart.inc

<?php

/**
 * @file
 * Basic cart shopping cart implementation functions.
 */

/**
 * Callback function for cart listing.
 */
function basic_cart_cart() {
  $cart = basic_cart_get_cart();
  if (empty($cart)) {
    return t('Your cart is empty.');
  }
  return drupal_get_form('basic_cart_cart_form');
}

/**
 * Shopping cart form.
 */
function basic_cart_cart_form() {

  // Getting the shopping cart.
  $cart = basic_cart_get_cart();

  // And now the form.
  $form['cartcontents'] = array(
    // Make the returned array come back in tree form.
    '#tree' => TRUE,
    '#prefix' => '<div class="basic-cart-cart basic-cart-grid">',
    '#suffix' => '</div>',
  );

  // Cart elements.
  foreach ($cart as $nid => $node) {
    $form['cartcontents'][$nid] = array(
      '#type' => 'textfield',
      '#size' => 1,
      '#default_value' => $node->basic_cart_quantity,
      '#theme' => 'basic_cart_render_cart_element',
    );
  }

  // Update button.
  $form['update'] = array(
    '#type' => 'submit',
    '#value' => t('Update'),
  );

  // Checkout button.
  $form['checkout'] = array(
    '#type' => 'submit',
    '#value' => t('Checkout'),
  );
  return $form;
}

/**
 * Shopping cart form.
 */
function basic_cart_cart_form_submit($form_id, $form_state) {
  foreach ($form_state['values']['cartcontents'] as $nid => $value) {
    $quantity = (int) $value;
    if ($quantity > 0) {
      $_SESSION['basic_cart']['cart'][$nid]->basic_cart_quantity = $quantity;
    }
    elseif ($quantity == 0) {
      unset($_SESSION['basic_cart']['cart'][$nid]);
    }
  }
  if ($form_state['values']['op'] == t('Checkout')) {
    drupal_goto('checkout');
  }
  else {
    drupal_set_message(t('Shopping cart updated.'));
  }
}

/**
 * Theme implementation for rendering the cart element.
 */
function theme_basic_cart_render_cart_element($variables) {

  // Element name and nid.
  $name = $variables['form']['#name'];
  $nid = (int) str_replace(array(
    'cartcontents[',
    ']',
  ), '', $name);
  if (empty($nid)) {
    return '';
  }

  // Delete image.
  $vars = array(
    'path' => base_path() . drupal_get_path('module', 'basic_cart') . '/images/delete.gif',
    'alt' => t('Remove from cart'),
    'title' => t('Remove from cart'),
    'attributes' => array(
      'class' => 'basic-cart-delete-image-image',
    ),
  );
  $delete_link = l(theme('image', $vars), 'cart/remove/' . $nid, array(
    'html' => TRUE,
  ));

  // Getting the node for it's title and description.
  $node = basic_cart_get_cart($nid);

  // Node description.
  $desc = '';
  if (isset($node->basic_cart_node_description)) {
    $desc = drupal_strlen($node->basic_cart_node_description) > 50 ? truncate_utf8($node->basic_cart_node_description, 50) : $node->basic_cart_node_description;
  }

  // Prefix.
  $prefix = '<div class="basic-cart-cart-contents row">';
  $prefix .= '  <div class="basic-cart-cart-quantity cell">';
  $prefix .= '    <div class="cell">';

  // Suffix.
  $suffix = '    </div>';
  $suffix .= '    <div class="cell basic-cart-cart-x">x</div>';
  $suffix .= '  </div>';
  $suffix .= '  <div class="basic-cart-cart-node-title cell">' . l($node->title, 'node/' . $nid) . '<br />';
  $suffix .= '    <span class="basic-cart-cart-node-summary">' . $desc . '</span>';
  $suffix .= '  </div>';
  $suffix .= '  <div class="basic-cart-delete-image cell">' . $delete_link . '</div>';
  $suffix .= '</div>';

  // Rendering the element as textfield.
  $quantity = theme('textfield', $variables['form']);

  // Full view return.
  return $prefix . $quantity . $suffix;
}

/**
 * Callback function for cart/add/.
 *
 * @param int $nid
 *   We are using the node id to store the node in the shopping cart
 */
function basic_cart_add_to_cart($nid = NULL) {
  $nid = (int) $nid;
  if ($nid > 0) {

    // If a node is added more times, just update the quantity.
    $cart = basic_cart_get_cart();
    if (!empty($cart) && in_array($nid, array_keys($cart))) {
      $_SESSION['basic_cart']['cart'][$nid]->basic_cart_quantity++;
    }
    else {

      // Slower, but easyer to implement.
      $node = node_load($nid);
      $node->basic_cart_quantity = 1;

      // Adding description.
      $body = field_get_items('node', $node, 'body');
      $description = isset($body[0]['value']) ? check_plain(strip_tags($body[0]['value'])) : '';
      $node->basic_cart_node_description = $description;

      // Storing in session.
      $_SESSION['basic_cart']['cart'][$nid] = $node;
    }
  }
  drupal_goto('cart');
}

/**
 * Callback function for cart/remove/.
 *
 * @param int $nid
 *   We are using the node id to remove the node in the shopping cart
 */
function basic_cart_remove_from_cart($nid = NULL) {
  $nid = (int) $nid;
  if ($nid > 0) {
    unset($_SESSION['basic_cart']['cart'][$nid]);
  }
  drupal_goto('cart');
}

/**
 * Function for shopping cart retrieval.
 *
 * @param int $nid
 *   We are using the node id to store the node in the shopping cart
 *
 * @return mixed
 *   Returning the shopping cart contents.
 *   An empty array if there is nothing in the cart
 */
function basic_cart_get_cart($nid = NULL) {
  if (isset($nid)) {
    return $_SESSION['basic_cart']['cart'][$nid];
  }
  if (isset($_SESSION['basic_cart']['cart'])) {
    return $_SESSION['basic_cart']['cart'];
  }

  // Empty cart.
  return array();
}

/**
 * Shopping cart reset.
 */
function basic_cart_empty_cart() {
  unset($_SESSION['basic_cart']['cart']);
}

/**
 * Checkout.
 */

/**
 * Checkout form implementation.
 */
function basic_cart_checkout() {
  $cart = theme('basic_cart_cart_flat', array(
    'cart' => basic_cart_get_cart(),
  ));

  // If the cart is empty, we don't want to show the checkout form.
  $shopping_cart = basic_cart_get_cart();
  if (empty($shopping_cart)) {
    return $cart;
  }
  $form = drupal_render(drupal_get_form('basic_cart_checkout_form'));
  return $cart . $form;
}

/**
 * Checkout form.
 */
function basic_cart_checkout_form() {
  $form['basic_cart_checkout_name'] = array(
    '#title' => t('Name'),
    '#type' => 'textfield',
    '#required' => TRUE,
    '#description' => t('Please enter your name.'),
  );
  $form['basic_cart_checkout_email'] = array(
    '#title' => t('Email'),
    '#type' => 'textfield',
    '#required' => TRUE,
    '#description' => t('Please enter your email.'),
  );
  $form['basic_cart_checkout_phone'] = array(
    '#title' => t('Phone'),
    '#type' => 'textfield',
    '#description' => t('Please enter your phone.'),
  );
  $form['basic_cart_checkout_address'] = array(
    '#title' => t('Address'),
    '#type' => 'textfield',
    '#description' => t('Please enter your address.'),
  );
  $form['basic_cart_checkout_message'] = array(
    '#title' => t('Message'),
    '#type' => 'textarea',
    '#description' => t('If you have something to tell us, please fill the message area.'),
  );
  $form['basic_cart_checkout_submit'] = array(
    '#type' => 'submit',
    '#value' => t('Submit order'),
  );
  return $form;
}

/**
 * Checkout form validation.
 */
function basic_cart_checkout_form_validate($form, &$form_state) {
  if (!valid_email_address($form_state['values']['basic_cart_checkout_email'])) {
    form_set_error('basic_cart_checkout_email', t('Please enter a valid email address.'));
  }
}

/**
 * Checkout form submit proccess.
 * Sending the 2 mails.
 */
function basic_cart_checkout_form_submit($form, &$form_state) {

  // %ORDER_DETAILS% placeholder.
  $order_details = '';
  $cart = basic_cart_get_cart();
  foreach ($cart as $nid => $node) {
    $order_details .= $node->basic_cart_quantity . ' x ' . $node->title . "\n";
  }
  $order_details .= "\n";

  // Pleaceholder replacement.
  $search = array(
    '%CUSTOMER_NAME',
    '%CUSTOMER_EMAIL',
    '%CUSTOMER_PHONE',
    '%CUSTOMER_ADDRESS',
    '%CUSTOMER_MESSAGE',
    '%ORDER_DETAILS',
  );
  $replace = array(
    $form_state['values']['basic_cart_checkout_name'],
    $form_state['values']['basic_cart_checkout_email'],
    $form_state['values']['basic_cart_checkout_phone'],
    $form_state['values']['basic_cart_checkout_address'],
    $form_state['values']['basic_cart_checkout_message'],
    $order_details,
  );

  // Admin mail.
  $message_html = variable_get('basic_cart_admin_message');
  $message_html = str_replace($search, $replace, $message_html);
  $params['admin_message'] = $message_html;
  $site_mail = variable_get('site_mail');

  // Sending mail.
  $message = drupal_mail('basic_cart', 'admin_mail', $site_mail, language_default(), $params);
  $mails_sent = 0;
  if ($message['result']) {
    $mails_sent++;
  }

  // User email.
  $send_user_mail = variable_get('basic_cart_send_user_message');
  if ($send_user_mail) {
    $message_html = variable_get('basic_cart_user_message');
    $message_html = str_replace($search, $replace, $message_html);
    $params['user_message'] = $message_html;

    // Sending mail.
    $message = drupal_mail('basic_cart', 'user_mail', $form_state['values']['basic_cart_checkout_email'], language_default(), $params);
    if ($message['result']) {
      $mails_sent++;
    }
  }
  if ($mails_sent >= 1) {
    basic_cart_empty_cart();
    drupal_goto('checkout/thank-you');
  }
  else {
    drupal_set_message(t('There was a problem in submitting your order. Please try again later.'), 'error');
  }
}

/**
 * Implements hook_mail().
 */
function basic_cart_mail($key, &$message, $params) {
  switch ($key) {
    case 'admin_mail':
      $message['subject'] = check_plain(variable_get('basic_cart_admin_subject'));
      $message['body'][] = filter_xss($params['admin_message']);
      break;
    case 'user_mail':
      $message['subject'] = check_plain(variable_get('basic_cart_user_subject'));
      $message['body'][] = filter_xss($params['user_message']);
      break;
  }
}

/**
 * Callback for thank you page.
 */
function basic_cart_checkout_thank_you() {
  $title = variable_get('basic_cart_thank_you_title');
  drupal_set_title($title);
  $message = variable_get('basic_cart_thank_you_message');
  return filter_xss($message);
}

Functions

Name	Description
basic_cart_add_to_cart	Callback function for cart/add/.
basic_cart_cart	Callback function for cart listing.
basic_cart_cart_form	Shopping cart form.
basic_cart_cart_form_submit	Shopping cart form.
basic_cart_checkout	Checkout form implementation.
basic_cart_checkout_form	Checkout form.
basic_cart_checkout_form_submit	Checkout form submit proccess. Sending the 2 mails.
basic_cart_checkout_form_validate	Checkout form validation.
basic_cart_checkout_thank_you	Callback for thank you page.
basic_cart_empty_cart	Shopping cart reset.
basic_cart_get_cart	Function for shopping cart retrieval.
basic_cart_mail	Implements hook_mail().
basic_cart_remove_from_cart	Callback function for cart/remove/.
theme_basic_cart_render_cart_element	Theme implementation for rendering the cart element.