File classes/controllers/RecentlyViewed.php | HJI WP Membership Code Reference

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<?php
namespace hji\ResponsiveIDX\controllers;


use \hji\membership\Membership;
use \hji\common\utils\Cookies;


class RecentlyViewed extends BaseController
{
    private static $_instance;
    private $cookieName = 'hjiViewer';
    private $dataExpire = 604800; // 7 days in seconds
    private $perPage = 25; // <- this value is also hardcoded in recentlyViewed.js


    /**
     * Returns current instance.
     *
     * @return IdxApp
     */
    static function getInstance()
    {
        if (!self::$_instance)
        {
            self::$_instance = new RecentlyViewed();
        }

        return self::$_instance;
    }


    function registerActions()
    {
        add_action('wp', array($this, 'init'));
        add_action('wp_ajax_getRecentlyViewed', array($this, 'getRecentlyViewed'));
        add_action('wp_ajax_nopriv_getRecentlyViewed', array($this, 'getRecentlyViewed'));
    }


    function init()
    {
        $cookie = $this->getCookie();

        if (!$cookie)
        {
            $this->setCookie();
        }

        $idxAction  = get_query_var('idx-action');
        $market     = get_query_var('idx-MlsID');
        $listingId  = get_query_var('idx-MlsNumber');

        if ($this->getCookie() && $idxAction == 'details' && $market && $listingId)
        {
            $this->addViewedListing($this->getCookie(), $market, $listingId);
        }

        $this->loadJsVars();
    }


    function loadJsVars()
    {
        $listings = $this->getViewedListings($this->getCookie());
        $count = 0;

        if (is_array($listings))
        {
            foreach($listings as $market)
            {
                $count += count($market);
            }
        }

        $pages = ceil($count/$this->perPage);
        $newVars = array('viewer' => $this->getCookie(), 'listingsViewed' => $count, 'pages' => $pages);
        idxApp::getInstance()->JsVars->setVar('recentlyViewed', $newVars);
    }


    function setCookie()
    {
        Cookies::setCookie($this->cookieName, uniqid("{$this->cookieName}_"), time() + $this->dataExpire);
    }


    function getCookie()
    {
        return Cookies::getCookie($this->cookieName);
    }


    function addViewedListing($uid, $market, $listingId)
    {
        $listings = $this->getViewedListings($uid);

        // Save viewed listing

        // If listing already exists, don't add it,
        // simply update the expiration of the cookie

        if (!isset($listings[$market]) || array_search($listingId, $listings[$market]) === false)
        {
            $listings[$market][] = $listingId;
        }

        if (!empty($listings))
        {
            set_transient($uid, $listings, $this->dataExpire);
        }
    }


    function getViewedListings($uid = null)
    {
        if (!$uid)
        {
            $uid = $this->getCookie();
        }

        if ($uid)
        {
            return get_transient($uid);
        }
    }


    function getRecentlyViewed()
    {
        if (isset($_POST['uid']) && !empty($_POST['uid']))
        {
            // Get all viewed listings by the current visitor

            if (!$data = $this->getViewedListings($_POST['uid']))
            {
                die(-1);
            }

            $pageNum = intval($_POST['page']);
            $offset = ($pageNum - 1) * $this->perPage;

            $listings = array();

            // To identify which listings go into which page
            // we have to merge all IDs into a single array
            // and grab $perPage number of listings at once
            // And only send request for those IDs

            $allIDs = array();

            foreach ($data as $market => $ids)
            {
                if (!empty($ids))
                {
                    foreach ($ids as $id)
                    {
                        $allIDs[] = array(
                            'id'    => $id,
                            'market'=> $market
                        );
                    }
                }
            }

            // Slice range of IDs for next page

            $slicedIDs = array_slice($allIDs, $offset, $this->perPage);

            if (empty($slicedIDs))
            {
                die();
            }

            // Group sliced IDs by market

            $nextPageIDs = array();

            foreach ($slicedIDs as $item)
            {
                $nextPageIDs[$item['market']][] = $item['id'];
            }

            foreach ($nextPageIDs as $market => $ids)
            {
                // Send request to get listings

                if ($result = $this->_getListings($market, $ids))
                {
                    $listings = array_merge($listings, $result);
                    $this->_updateIds($market, $ids, $result);
                }
            }

            if (!empty($listings))
            {
                $vars['listings'] = $listings;

                $view = new \hji\ResponsiveIDX\utils\View;
                echo $view->render('recently-viewed-listings', $vars);
            }

            die();
        }
    }


    private function _getListings($market, $listingIds)
    {
        $_params['id']          = implode('|', $listingIds);
        $_params['market']      = $market;
        $_params['pageNumber']  = isset($_POST['page']) ? $_POST['page'] : 1;
        $_params['pageSize']    = $this->perPage;
        $_params['action']      = 'searchListings';
        $_params['sortField']   = "";
        $_params['sortOrder']   = "";

        $idxSearchModel = IdxApp::getInstance()->idxSearchModel;
        $idxSearchModel->SetSearchParams($_params);

        $params =$idxSearchModel->GetSearchParams();

        $result  = $idxSearchModel->searchListings($params->apiready);

        if (isset($result->listings))
        {
            // Sort listings in the order they were added

            $listings = $this->_sort($listingIds, $result->listings);

            return $listings;
        }
    }


    /**
     * Sorts listings in the order they were added
     *
     * @param $ids
     * @param $listings
     * @return array
     */
    private function _sort($ids, $listings)
    {
        $result = array();

        // Add listing ids as keys to the listings array

        foreach($listings as $listing)
        {
            $items[$listing->id] = $listing;
        }

        foreach ($ids as $id)
        {
            if (isset($items[$id]))
            {
                $result[] = $items[$id];
            }
        }

        return $result;
    }


    /**
     * Removes off the market listing IDs from recently viewed.
     *
     * @param $market
     * @param $oldIDs
     * @param $listings
     */
    private function _updateIds($market, $oldIDs, $listings)
    {
        $viewedListings = $this->getViewedListings($this->getCookie());

        $updateTransient = false;
        $newIDs = array();

        foreach($listings as $listing)
        {
            $newIDs[] = $listing->id;
        }

        foreach ($oldIDs as $id)
        {
            if (!in_array($id, $newIDs))
            {
                $k = array_search($id, $viewedListings[$market]);
                unset($viewedListings[$market][$k]);
                $updateTransient = true;
            }
        }

        if ($updateTransient)
        {
            set_transient($this->getCookie(), $viewedListings, $this->dataExpire);
        }
    }

}

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