socialfeed.php

<?php 
	// Social Feed para sitios en wordpress

	class SocialFeed {

		private static $instance;
		public $feed_list;

		public $yt_status;
		public $fb_status;
		public $tw_status;

		//Constantes de Facebook
		//Esto se puede obtener de http://findmyfacebookid.com/
		const facebook_id = '';
		const fb_app_id = '';
		const fb_app_secret = '';
		const fb_maximum_posts = 10;

		// Constantes de Twitter
		const tw_consumerKey = '';
		const tw_consumerSecret = '';
		const tw_accessToken = '';
		const tw_accessTokenSecret = '';
		const tw_bearerToken = '';
		const tw_account = '';
		const tw_maximum_posts = '10';

		//Constantes de Youtube
		const yt_api_browser = '';
		const yt_client_id = '';
		const yt_client_secret = '';
		const yt_channel_id = '';

		const transient_expiration = 1; //1 hora de duración

		private function __construct(){

			$this->actions_manager();

		}
		public static function get_instance(){
			if ( !isset(self::$instance) ){
				$c = __CLASS__;
				self::$instance = new $c;
			}
			return self::$instance;
		}
		public function __clone(){
			trigger_error( 'Clone is not allowed.', E_USER_ERROR );
		}
		/*
			Llama a las acciones al instanciar la clase
		*/
		public function actions_manager() {
			$this->mix_feed();
		}
		/*
			Setea la variable feed_list que almacena todo el feed
		*/
		public function set_feed($feed) {
			$this->feed_list = $feed;
		}
		/*
			Obtiene la variable con todo el feed
		*/
		public function get_feed() {
			return $this->feed_list;
		}
		/*
			Obtiene todo los feeds, los normaliza y los ordena por fecha
		*/
		public function mix_feed() {

			$fb_feed = json_decode($this->get_facebook_feed());
			$tw_feed = json_decode($this->get_twitter_feed());
			$yt_feed = json_decode($this->get_youtube_feed());
			$post_feed = new WP_Query(array( 
				'post_type' => 'post',
				'post_status' => 'publish',
				'posts_per_page' => 10
				));

			$social_mix = array();
			if (is_array($fb_feed->data)) {
				foreach ( $fb_feed->data as $item ) {
					$entry = new StdClass;
					$entry->ID = $item->id;
					$entry->type = 'facebook';
					$entry->date = strtotime($item->created_time);
					$entry->clean_date = $item->created_time;
					if ( !empty( $item->message ) ) {
						$entry->content = $item->message;
					}
					if ( !empty( $item->full_picture ) ) {
						$entry->picture = $item->full_picture;
					}
					if ( !empty( $item->link ) ) {
						$entry->link = $item->link;
					}

					array_push($social_mix, $entry);
				}
			}
			if (is_array($tw_feed)) {
				foreach ( $tw_feed as $item ) {
					$entry = new StdClass;
					$entry->ID = $item->id_str;
					$entry->type = 'twitter';
					$entry->date = strtotime($item->created_at);
					$entry->clean_date = $item->created_at;
					$entry->content = $item->text;
					$entry->link = 'https://www.twitter.com/'.self::tw_account.'/status/'.$item->id_str;

					array_push($social_mix, $entry);
				}
			}
			if (is_array($yt_feed->items)) {
				foreach ( $yt_feed->items as $item ) {
					if ( !empty( $item->id->videoId ) ) {
						$entry = new StdClass;
						$entry->ID = $item->id->videoId;
						$entry->type = 'youtube';
						$entry->date = strtotime($item->snippet->publishedAt);
						$entry->clean_date = $item->snippet->publishedAt;
						$entry->content = $item->snippet->title;
						$entry->picture = $item->snippet->thumbnails->high->url;
						$entry->link = 'https://www.youtube.com/watch?v='.$entry->ID;

						array_push($social_mix, $entry);
					}
				}
			}
			if ($post_feed->have_posts()) {
				foreach ( $post_feed->posts as $item ) {
					$entry = new StdClass;
					$entry->ID = $item->ID;
					$entry->type = 'site';
					$entry->date = strtotime($item->post_date);
					$entry->clean_date = $item->post_date;
					$entry->content = get_the_title($item->ID);
					$entry->picture = ( ( has_post_thumbnail( $item->ID ) ) ? current( wp_get_attachment_image_src( get_post_thumbnail_id( $item->ID ), 'medium' ) ) : '' );
					$entry->link = get_the_permalink($item->ID);

					array_push($social_mix, $entry);
				}
			}
			$social_mix = $this->order_feed($social_mix);
			$this->set_feed($social_mix);
		}
		/*
			Regenera los transients de todos los feeds o por separado
		*/
		public function regenerate_transient($rrss=null) {
			if ( !empty($rrss) ) {
				switch ($rrss) {
					case 'yt':
						delete_transient( 'yt_feed' );
					break;
					case 'fb':
						delete_transient( 'fb_feed' );
					break;
					case 'tw':
						delete_transient( 'tw_feed' );
					break;
				}
			}
			else {
				delete_transient( 'yt_feed' );
				delete_transient( 'fb_feed' );
				delete_transient( 'tw_feed' );
			}
		}
		/*
			Ordena por fecha el feed
		*/
		public function order_feed($feed) {
			 usort($feed, function($a, $b){
                    if ( $a->date < $b->date ) return 1;
                    if ( $a->date > $b->date ) return -1;
                    return 0;
                });
			 return $feed;
		}
		/*
			Parsea hashtags de twitter y facebook, transforma urls, y linkea cuentas de twitter
		*/
		public static function parse_hashtag($text,$rrss) {
			$pre_ht_url = ( $rrss == 'fb' ) ? 'https://www.facebook.com/hashtag/' : 'https://twitter.com/hashtag/';
			$pos_ht_url = ( $rrss == 'fb' ) ? '?source=web' : '?src=web';

			$text = preg_replace('/([\w]+\:\/\/[\w-?&;#~=\.\/\@]+[\w\/])/', ' <a href="$1" target="_blank">$1</a> ', $text);
			$text = preg_replace('/(\#)([^\s]+)/', ' <a href="'.$pre_ht_url.'$2'.$pos_ht_url.'">#$2</a> ', $text);
			//$text = preg_replace('/(\#)([^\s]+)/', ' '.$pre_ht_url.'$3'.$pos_ht_url.'">#$3 ', $text);
			if ($rrss == 'tw') {
			    //parse users
			    $text = preg_replace('/@(\w+)/', ' <a href="http://twitter.com/$1">@$1</a> ', $text);
			}
			return $text;
		}
		/*
			Trnasforma la fecha a "hace X minutos/horas/dias"
		*/
		public static function twitter_time($a) {    
		    //get current timestampt
		    $b = strtotime("now");
		    //get timestamp when tweet created
		    $c = strtotime($a);
		    //get difference
		    $d = $b - $c;
		    //calculate different time values
		    $minute = 60;
		    $hour = $minute * 60;
		    $day = $hour * 24;
		    $week = $day * 7;
		    if(is_numeric($d) && $d > 0) {
		        //if less then 3 seconds
		        if($d < 3) return "ahora";
		        //if less then minute
		        if($d < $minute) return "hace ". floor($d) . " segundos";
		        //if less then 2 minutes
		        if($d < $minute * 2) return "hace 1 minuto";
		        //if less then hour
		        if($d < $hour) return "hace ". floor($d / $minute) . " minutos";
		        //if less then 2 hours
		        if($d < $hour * 2) return "hace 1 hora";
		        //if less then day
		        if($d < $day) return "hace ". floor($d / $hour) . " horas";
		        //if more then day, but less then 2 days
		        if($d > $day && $d < $day * 2) return "ayer";
		        //if less then year
		        if($d < $day * 365) return "hace ". floor($d / $day) . " días";
		        //else return more than a year
		        return "mas de 1 año";
		    }    
		}
		/*
			Obtenemos el feed de youtube transient
		*/
		public function get_youtube_feed() {

			if ( false === ( $response = get_transient( 'yt_feed' ) ) ) {
				$url = 'https://www.googleapis.com/youtube/v3/search?part=id%2Csnippet&channelId='.self::yt_channel_id.'&key='.self::yt_api_browser;
				$response = wp_remote_get($url);
				if ( !is_wp_error($response) ) {
					$status_code = $response['response']['code'];
					$status_message = $response['response']['message'];
					$response = wp_remote_retrieve_body( $response );				
					$this->yt_status =  $status_code;
					$this->yt_status_message =  $status_message;
					set_transient( 'yt_feed', $response, 60*60*self::transient_expiration );
				}
			}
			return $response;

		}
		/*
			Obtenemos el feed de Twitter transient
		*/
		public function get_twitter_feed() {
			if ( false === ( $response = get_transient( 'tw_feed' ) ) ) {
				$response = wp_remote_get('https://api.twitter.com/1.1/statuses/user_timeline.json?screen_name='.self::tw_account, array(
				    'headers' => array(
				        'Authorization' => 'Bearer ' . self::tw_bearerToken
				    ),
				));
				if (!is_wp_error( $response )) {
					$status_code = $response['response']['code'];
					$status_message = $response['response']['message'];
					$response = wp_remote_retrieve_body( $response );				
					
					$this->tw_status =  $status_code;
					$this->tw_status_message =  $status_message;
					set_transient( 'tw_feed', $response, 60*60*self::transient_expiration );
				}
			}
			return $response;
		}
		/*
			Obtenemos el feed de Facebook transient
		*/
		public function get_facebook_feed() {
			if ( false === ( $response = get_transient( 'fb_feed' ) ) ) {
				$id_url = 'https://graph.facebook.com/oauth/access_token?grant_type=client_credentials&client_id='.self::fb_app_id.'&client_secret='.self::fb_app_secret.'';
				$auth = wp_remote_get( $id_url );
				$auth = wp_remote_retrieve_body($auth);
				
				$response = wp_remote_get('https://graph.facebook.com/'.self::facebook_id.'/posts?'.$auth.'&limit='.self::fb_maximum_posts.'&fields=message,created_time,picture,full_picture,id,link');
				if ( !is_wp_error( $response ) ) {
					$status_code = $response['response']['code'];
					$status_message = $response['response']['message'];
					$response = wp_remote_retrieve_body($response);
					$this->fb_status =  $status_code;
					$this->fb_status_message = $status_message;
					set_transient( 'fb_feed', $response, 60*60*self::transient_expiration );
				}
			}
			return $response;
		}
		/*
			Layout de entrada twiiter
		*/
		static function render_tweet($item) {
			$out = '';
			$out .= '<article class="qentry hentry tweet">';
				$out .= '<span class="comma">"</span>';
				$out .= '<span class="tweet-text">';
					$out .= self::parse_hashtag($item->content,'tw');
				$out .= '</span>';
				$out .= '<hr class="divider">';
				$out .= '<span class="dashicons dashicons-twitter"></span> <a href="'.$item->link.'">'.self::twitter_time($item->clean_date).'</a>';
				$out .= '<a href="https://www.twitter.com/'.self::tw_account.'" class="user float-right">@'.self::tw_account.'</a>';
			$out .= '</article>';
			return $out;
		}
		/*
			Layout de entrada del sitio
		*/
		static function render_site($item) {
			$out = '';
			$out .= '<article class="qentry hentry site-entry">';
				$out .= '<a href="'.get_permalink($item->ID).'">';
					if ( has_post_thumbnail( $item->ID ) ) {
						$out .= get_the_post_thumbnail( $item->ID, 'home-post' );
					}
					$out .= '<h4 class="entry-title">'.get_the_title($item->ID).'</h4>';
				$out .= '</a>';
				
				$out .= '<hr class="divider">';
				$cats = wp_get_post_categories( $item->ID );
				if (!empty( $cats )) {
					$category = get_category( $cats[0] );
					$link = get_category_link( $cats[0] );
					$out .= '<a href="'.$link.'">'.$category->name.'</a>';
				}
				$out .= '<a href="'.get_permalink($item->ID).'" class="date float-right">'.get_the_date('d/m/Y',$item->ID).'</a>';
			$out .= '</article>';
			return $out;
		}
		/*
			Layout de entrada de Youtube
		*/
		static function render_video($item) {
			$out = '';
			$out .= '<article class="qentry hentry video">';
				$out .= '<a href="'.$item->link.'" class="box" rel="youtube">';
					$out .= '<div class="wrap-image">';
						$out .= '<img src="'.$item->picture.'" alt="">';
						$out .= '<span class="dashicons dashicons-controls-play"></span>';
					$out .= '</div>';
					$out .= '<h4 class="entry-title">'.$item->content.'</h4>';
				$out .= '</a>';
				
				$out .= '<a href="https://www.youtube.com/channel/'.self::yt_channel_id.'"><span class="dashicons dashicons-video-alt3"></span> Une Chile</a> / <a href="'.$item->link.'">'.mysql2date('d/m/Y',$item->clean_date).'</a>';
			$out .= '</article>';
			return $out;
		}
		/*
			Layout de entrada de Facebook
		*/
		static function render_fb($item) {
			$out = '';
			$out .= '<article class="qentry hentry fb">';
				if ( !empty( $item->picture ) ) {
					$out .= '<a href="'.$item->link.'">';
						$out .= '<img src="'.$item->picture.'" alt="">';
					$out .= '</a>';
				}
				$out .= '<p class="entry-content">';
					$out .= self::parse_hashtag(do_excerpt($item->content),'fb');
				$out .= '</p>';
				
				$out .= '<hr class="divider">';
				
				$out .= '<a href="https://www.facebook.com/UnionNacionalEstudiantil"><span class="dashicons dashicons-facebook-alt"></span> Une Chile </a>';
				$out .= '<a href="'.$item->link.'" class="date float-right">'.mysql2date('d/m/Y',$item->clean_date).'</a>';
			$out .= '</article>';
			return $out;
		}
	}

	$_feed = SocialFeed::get_instance();
 ?>