165 lines
5.5 KiB
PHP
165 lines
5.5 KiB
PHP
<?php
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/*
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+--------------------------------------------------------------------+
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| CiviCRM version 4.7 |
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+--------------------------------------------------------------------+
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| Copyright CiviCRM LLC (c) 2004-2017 |
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+--------------------------------------------------------------------+
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| This file is a part of CiviCRM. |
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| CiviCRM is free software; you can copy, modify, and distribute it |
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| under the terms of the GNU Affero General Public License |
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| Version 3, 19 November 2007 and the CiviCRM Licensing Exception. |
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| CiviCRM is distributed in the hope that it will be useful, but |
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| WITHOUT ANY WARRANTY; without even the implied warranty of |
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| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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| See the GNU Affero General Public License for more details. |
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| You should have received a copy of the GNU Affero General Public |
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| License and the CiviCRM Licensing Exception along |
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| with this program; if not, contact CiviCRM LLC |
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| at info[AT]civicrm[DOT]org. If you have questions about the |
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| GNU Affero General Public License or the licensing of CiviCRM, |
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| see the CiviCRM license FAQ at http://civicrm.org/licensing |
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+--------------------------------------------------------------------+
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*/
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/**
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*
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* @package CRM
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* @copyright CiviCRM LLC (c) 2004-2017
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* $Id$
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*
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*/
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/**
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* Main page for blog dashlet
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*/
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class CRM_Dashlet_Page_Blog extends CRM_Core_Page {
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const CHECK_TIMEOUT = 5;
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const CACHE_DAYS = 1;
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const NEWS_URL = 'https://civicrm.org/news-feed.rss';
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/**
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* Gets url for blog feed.
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*
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* @return string
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*/
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public function getNewsUrl() {
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// Note: We use "*default*" as the default (rather than self::NEWS_URL) so that future
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// developers can change NEWS_URL without needing to update {civicrm_setting}.
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$url = Civi::settings()->get('blogUrl');
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if ($url === '*default*') {
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$url = self::NEWS_URL;
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}
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return CRM_Utils_System::evalUrl($url);
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}
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/**
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* Output data to template.
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*/
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public function run() {
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$this->assign('feeds', $this->getData());
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return parent::run();
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}
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/**
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* Load feeds from cache.
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*
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* Refresh cache if expired.
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*
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* @return array
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*/
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protected function getData() {
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// Fetch data from cache
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$cache = CRM_Core_DAO::executeQuery("SELECT data, created_date FROM civicrm_cache
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WHERE group_name = 'dashboard' AND path = 'newsfeed'");
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if ($cache->fetch()) {
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$expire = time() - (60 * 60 * 24 * self::CACHE_DAYS);
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// Refresh data after CACHE_DAYS
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if (strtotime($cache->created_date) < $expire) {
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$new_data = $this->getFeeds();
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// If fetching the new rss feed was successful, return it
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// Otherwise use the old cached data - it's better than nothing
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if ($new_data) {
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return $new_data;
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}
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}
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return unserialize($cache->data);
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}
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return $this->getFeeds();
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}
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/**
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* Fetch all feeds & cache results.
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*
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* @return array
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*/
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protected function getFeeds() {
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$newsFeed = $this->getFeed($this->getNewsUrl());
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// If unable to fetch the feed, return empty results.
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if (!$newsFeed) {
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return array();
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}
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$feeds = $this->formatItems($newsFeed);
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CRM_Core_BAO_Cache::setItem($feeds, 'dashboard', 'newsfeed');
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return $feeds;
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}
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/**
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* Parse a single rss feed.
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*
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* @param $url
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*
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* @return array|NULL
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* array of blog items; or NULL if not available
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*/
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protected function getFeed($url) {
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$httpClient = new CRM_Utils_HttpClient(self::CHECK_TIMEOUT);
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list ($status, $rawFeed) = $httpClient->get($url);
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if ($status !== CRM_Utils_HttpClient::STATUS_OK) {
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return NULL;
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}
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return @simplexml_load_string($rawFeed);
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}
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/**
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* @param string $feed
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* @return array
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*/
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protected function formatItems($feed) {
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$result = array();
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if ($feed && !empty($feed->channel)) {
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foreach ($feed->channel as $channel) {
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$content = array(
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'title' => (string) $channel->title,
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'description' => (string) $channel->description,
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'name' => strtolower(CRM_Utils_String::munge($channel->title, '-')),
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'items' => array(),
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);
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foreach ($channel->item as $item) {
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$item = (array) $item;
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$item['title'] = strip_tags($item['title']);
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// Clean up description - remove tags & styles that would break dashboard layout
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$description = preg_replace('#<h[1-3][^>]*>(.+?)</h[1-3][^>]*>#s', '<h4>$1</h4>', $item['description']);
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$description = strip_tags($description, "<a><p><h4><h5><h6><b><i><em><strong><ol><ul><li><dd><dt><code><pre><br><hr>");
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$description = preg_replace('/(<[^>]+) style=["\'].*?["\']/i', '$1', $description);
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// Add paragraph markup if it's missing.
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if (strpos($description, '<p') === FALSE) {
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$description = '<p>' . $description . '</p>';
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}
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$item['description'] = $description;
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$content['items'][] = $item;
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}
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if ($content['items']) {
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$result[] = $content;
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}
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}
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}
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return $result;
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}
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}
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