<?php
/**
 * @name		Slideshow CK
 * @package		com_slideshow
 * @copyright	Copyright (C) 2016. All rights reserved.
 * @license		GNU General Public License version 2 or later; see LICENSE.txt
 * @author		Cedric Keiflin - https://www.template-creator.com - https://www.joomlack.fr
 */

// No direct access
defined('_JEXEC') or die;

/**
 * Helper Class.
 */
class SlideshowckHelpersourceFlickr {

	private static $params;

	/**
	 * Static variable used to determin whether the plugin is running or not
	 * @var boolean
	 */
	public static $running;

	/*
	 * Get the items from the source
	 */
	public static function getItems(&$params) {
		self::$params = $params;

		$apikey = $params->get('flickr_apikey');
		if (! $apikey) {
			echo '<p>SLIDESHOW CK ERROR : no API Key found for Flickr.</p>';
			return false;
		}
		$photoset = $params->get('flickr_photoset');
		if (! $photoset) {
			echo '<p>SLIDESHOW CK ERROR : no Photoset ID found for Flickr.</p>';
			return false;
		}

		$url = 'https://api.flickr.com/services/rest/?format=json&method=flickr.photosets.getPhotos&extras=description,original_format,url_sq,url_t,url_s,url_m,url_o&nojsoncallback=1';
		$url .= '&api_key=' . $apikey;
		$url .= '&photoset_id=' . $photoset;

		// setup cache to speedup the page load
		$timeInterval = $params->get('flickr_timeinterval', '1', 'int');
		if ($timeInterval < 1) $timeInterval = 1;
		$timeInterval = $timeInterval * 60;

		$cache = \Joomla\CMS\Factory::getCache('mod_slideshowck.flickr', '');
		$cache->setCaching(true);
		$key = $url;
		$cacheContent = $cache->get($key);
		
		// set timer to get the new data from the source
		self::$running = true;
		$lastRun = (int) $cache->get($key . '.time', 0);

		$currentTime = time();
		$numberMinutes = ($currentTime - $lastRun) / 60;

		if (! empty($cacheContent) && $numberMinutes < $timeInterval)
		{
			$items = $cacheContent;
		} else {
		
			if (ini_get('allow_url_fopen') && function_exists('file_get_contents')) {  
				$result = file_get_contents($url);  
			}
			// look for curl
			if ($result == '' && extension_loaded('curl')) {
				$ch = curl_init();  
				$timeout = 30;  
				curl_setopt($ch, CURLOPT_URL, $url);  
				curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
				curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
				curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, 0);
				curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
				curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);  
				$result = curl_exec($ch);  
				curl_close($ch);  
			}

			$images = json_decode($result)->photoset->photo;
			$items = Array();
			$i = 0;
			$flickrSuffixes = array('o', 'k', 'h', 'b', 'z', 'sq', 't', 'sm', 'm');
			foreach ($images as & $image) {
				$item = SlideshowckHelper::initItem();
				if ($params->get('flickr_image_size', 'auto') == 'auto') {
				$suffix = 'o';
				foreach ($flickrSuffixes as $flickrSuffixe) {
					if (isset($image->{'url_' . $flickrSuffixe})) {
						$suffix = $flickrSuffixe;
							$image_url = $image->{'url_' . $suffix};
						break;
					}
				}
				} else {
					$suffix = $params->get('flickr_image_size', 'o');
					$image_url = 'https://live.staticflickr.com/' . $image->server . '/' . $image->id . '_' . $image->secret . '_' . $suffix . '.jpg';
				}

				$item->image = $image_url;
				$item->title = $image->title;
				$item->text = $image->description->_content;
				$item->link = $image_url;

				$items[$i] = $item;
				$i++;
			}

			$cache->store($items, $key);
			$cache->store($currentTime, $key . '.time');

		}
		return $items;
	}
}