commerce_email_cart.module

<?php

/**
 * Implements hook_menu().
 * Used to add items to cart based on add to cart urls & build cart email form
 */
function commerce_email_cart_menu() {
  $items = array();
  $items['commerce/add-to-cart/%'] = array(
    'title' => t('Add item to cart'),
    'type' => MENU_CALLBACK,
    'page callback' => 'commerce_email_cart_add_to_cart',
    'page arguments' => array(2),
    'access arguments' => array('access content'),
  );
  $items['commerce/email-cart'] = array(
    'title' => t('Email Cart'),
    'page callback' => 'drupal_get_form',
    'page arguments' => array('commerce_email_cart_form'),
    'access arguments' => array('access content'),
    'file' => 'commerce_email_cart_form.inc',
  );

  return $items;
}

/**
 * Programmatically adds an item to a cart by product id.
 * Add to cart url to be created as follows commerce/add-to-cart/1-2,2-2.
 * Where 1-2 is productID-productQTY.
 */
function commerce_email_cart_add_to_cart($data) {
  $products = explode(',', $data);
  $error_msg = t('Add to Cart URL Syntax Error');

  // Loop through products
  foreach ($products as $delta => $product) {
    $product = explode('-', $product);

    if (isset($product[0]) && isset($product[1])) {
      // Run strings through sanitization functions.
      $product_id = check_plain($product[0]);
      $quantity = check_plain($product[1]);

      // Add product to the cart.
      commerce_cart_product_add_by_id($product_id, $quantity);
    }
    else {
      // Set error message.
      drupal_set_message($error_msg, 'error');
    }
  }

  // Go to the cart page.
  drupal_goto('cart');
}

/**
 * Builds and returns custom add to cart link based on current user's cart.
 */
function commerce_cart_email_build_link() {
  global $base_url;
  global $user;

  // Ger user id.
  $uid = 0;
  if ($user->uid != 0) {
    $uid = $user->uid;
  }

  // Load current user's order id.
  $order_id = commerce_cart_order_load($uid);

  if (isset($order_id->commerce_line_items['und'])) {
    $line_items = $order_id->commerce_line_items['und'];

    // Build products array from order id.
    foreach ($line_items as $line_item) {
      $line_item_id = $line_item['line_item_id'];
      $product = commerce_line_item_load($line_item_id)->commerce_product['und'][0]['product_id'];
      $quantity = commerce_line_items_quantity($line_item);

      $products[] = array(
        'product' => $product,
        'quantity' => $quantity
      );
    }

    $link = $base_url . '/commerce/add-to-cart/';

    foreach ($products as $product) {
      $product_id = $product['product'];
      $product_qty = $product['quantity'];
      $link .= $product_id . '-' . $product_qty . ',';
    }

    $link = substr($link, 0, -1);

    return $link;
  }
  else {
    drupal_set_message(t('You need to add some products to your cart before you can send an email.'), 'error');
  }

}

/*
 * Implements hook_block_info().
 */
function commerce_email_cart_block_info() {
  // Set commerce_email_cart block info.
  $blocks['commerce_email_cart'] = array(
    'info' => t('Commerce Email Cart Block')
  );

  return $blocks;
}

/*
 * Build block content.
 */
function commerce_email_cart_build_block(){
  // Get global variables.
  global $base_url;

  // Build email cart link to be displayed in a block.
  $options = array(
    'html' => TRUE,
    'attributes' => array(
      'class' => array('commerce-email-cart--link'),
    ),
  );
  $image = $base_url . '/' . drupal_get_path('module', 'commerce_email_cart') . "/images/email.png";
  $output_html = "<label class='commerce-email-cart--label'>Email Cart</label> <img src='$image' />";
  $output = l($output_html, 'commerce/email-cart', $options);

  return $output;
}

/*
 * Implements hook_block_view().
 */
function commerce_email_cart_block_view($delta = '') {
  // Build commerce_email_cart block.
  $block = array();

  switch ($delta) {
    case 'commerce_email_cart':
      $block['content'] = array(
        '#type' => 'markup',
        '#markup' => commerce_email_cart_build_block(),
      );
      break;
  }

  return $block;
}

/*
 * Email the add to cart links
 */
function commerce_email_cart_email() {
  drupal_set_message('email cart', 'status');
}