<?php
/**
 * @file
 * Provides core hooks and the like for the module
 * @copyright Copyright(c) 2011 Rowlands Group
 * @license GPL v2 http://www.fsf.org/licensing/licenses/gpl.html
 * @author Lee Rowlands leerowlands at rowlandsgroup dot com
 */

/**
 * Implements hook_help().
 */
function commerce_node_checkout_expire_help($path, $arg) {
  switch ($path) {
    case 'admin/help#commerce_node_checkout_expire':
      return t("Enables content published via Commerce Node Checkout to be unpublished.");
  }
}

/**
 * Implements hook_menu().
 */
function commerce_node_checkout_expire_menu() {
  // Menu callback to allow the user to purchase an extension on their published node.
  $items['node/%node/relist'] = array(
    'title callback' => 'commerce_node_checkout_expire_relist_title',
    'title arguments' => array(1),
    'file' => 'commerce_node_checkout_expire.pages.inc',
    'page callback' => 'drupal_get_form',
    'page arguments' => array('commerce_node_checkout_expire_relist_form', 1),
    'description' => 'Renew your listing',
    'access arguments' => array(1),
    'access callback' => 'commerce_node_checkout_expire_relist_access',
    'type' => MENU_LOCAL_TASK,
  );
  $items['admin/commerce/config/node-checkout-expire'] = array(
    'title' => 'Node Checkout Expire',
    'file' => 'commerce_node_checkout_expire.admin.inc',
    'description' => 'Configure node checkout expiry settings',
    'access arguments' => array('administer commerce node checkout expire'),
    'type' => MENU_NORMAL_ITEM,
    'page callback' => 'drupal_get_form',
    'page arguments' => array('commerce_node_checkout_expire_admin_form')
  );
  return $items;
}

/**
 * Implements hook_permission().
 */
function commerce_node_checkout_expire_permission() {
  return array(
    'administer commerce node checkout expire' => array(
      'title' => t('Administer Commerce Node Checkout'),
      'description' => t('Perform administration tasks for Commerce Node Checkout.'),
    ),
  );
}

/**
 * Implements hook_mail
 */
function commerce_node_checkout_expire_mail() {

}

/************************************************************
 * Access callbacks
 ************************************************************/
/**
 * Access callback to check associated node is able to be relisted.
 *
 * @param object $node
 *   The node object
 */
function commerce_node_checkout_expire_relist_access($node) {
  $products = commerce_node_checkout_get_products_by_type($node->type);
  $line_items = commerce_node_checkout_expire_get_line_item_by_node($node);
  return !empty($products) && !empty($line_items);
}

/************************************************************
 * Title callbacks
 ************************************************************/
/**
 * Title callback to relist node
 *
 * @param object $node
 *   The node object
 */
function commerce_node_checkout_expire_relist_title($node) {
  return t('Relist @title', array('@title' => $node->title));
}

/************************************************************
 * Module functions
 ************************************************************/

/**
 * Fetch most current line item associated with a node
 *
 * @param object $node
 *   The node object
 *
 * @return array
 *   the associated line items
 *
 * @see EntityFieldQuery
 */
function commerce_node_checkout_expire_get_line_item_by_node($node) {
  $query = new EntityFieldQuery();
  $query->entityCondition('entity_type', 'commerce_line_item');
  $query->entityCondition('bundle', 'commerce_node_checkout');
  $query->fieldCondition('commerce_node_checkout_node', 'nid', $node->nid);
  $query->fieldOrderBy('commerce_node_checkout_expires', 'value', 'DESC');
  // We only need the one that expires last.
  $query->range(1, 0);
  $results = $query->execute();
  if (!empty($results['commerce_line_item'])) {
    return commerce_line_item_load_multiple(array_keys($results['commerce_line_item']));
  }
  return array();
}

/**
 * Implements hook_commerce_node_checkout_line_item_alter
 */
function commerce_node_checkout_expire_commerce_node_checkout_line_item_alter(&$line_item, $product, $node) {
  // Load the interval field from the product.
  $interval = field_get_items('commerce_product', $product, 'commerce_node_checkout_expire');
  if ($interval && !empty($interval[0])) {
    // We have an expiry field - apply it.
    $due_date_obj = new DateObject('now');
    if (interval_apply_interval($due_date_obj, $interval[0])) {
      // Update the expiry field on the line item.
      $line_item->commerce_node_checkout_expires[LANGUAGE_NONE][0]['value'] = $due_date_obj->format('U');
    }
  }
}