From c6fbb46108ae40b3f50833946d2bc5fb5bc9a2e9 Mon Sep 17 00:00:00 2001
From: Hypolite Petovan <ben.lort@gmail.com>
Date: Wed, 16 Nov 2016 23:26:43 -0500
Subject: [PATCH] ping.php performance: Add JSON output

- Added JSON/JSONP support
- Added XML backward-compatible output
- Updated main.js to handle JSON data
- Removed unused references to non-existant DOM elements
---
 js/main.js   | 184 +++++++++----------------
 mod/ping.php | 383 +++++++++++++++++++++++++++++----------------------
 2 files changed, 286 insertions(+), 281 deletions(-)

diff --git a/js/main.js b/js/main.js
index 008d84b0b..958b0a8ae 100644
--- a/js/main.js
+++ b/js/main.js
@@ -179,110 +179,77 @@
 		$('#nav-notifications-menu, aside').perfectScrollbar();
 
 		/* nav update event  */
-		$('nav').bind('nav-update', function(e,data){
-			var invalid = $(data).find('invalid').text();
+		$('nav').bind('nav-update', function(e, data){
+			var invalid = data.invalid || 0;
 			if(invalid == 1) { window.location.href=window.location.href }
 
-			var net = $(data).find('net').text();
-			if(net == 0) { net = ''; $('#net-update').removeClass('show') } else { $('#net-update').addClass('show') }
-			$('#net-update').html(net);
+			['net', 'home', 'intro', 'mail', 'events', 'birthdays', 'notify'].forEach(function(type) {
+				var number = data[type];
+				if (number == 0) {
+					number = '';
+					$('#' + type + '-update').removeClass('show');
+				} else {
+					$('#' + type + '-update').addClass('show');
+				}
+				$('#' + type + '-update').text(number);
+			});
 
-			var home = $(data).find('home').text();
-			if(home == 0) { home = '';  $('#home-update').removeClass('show') } else { $('#home-update').addClass('show') }
-			$('#home-update').html(home);
-
-			var intro = $(data).find('intro').text();
-			if(intro == 0) { intro = '';  $('#intro-update').removeClass('show') } else { $('#intro-update').addClass('show') }
-			$('#intro-update').html(intro);
-
-			var mail = $(data).find('mail').text();
-			if(mail == 0) { mail = '';  $('#mail-update').removeClass('show') } else { $('#mail-update').addClass('show') }
-			$('#mail-update').html(mail);
-
-			var intro = $(data).find('intro').text();
-			if(intro == 0) { intro = '';  $('#intro-update-li').removeClass('show') } else { $('#intro-update-li').addClass('show') }
+			var intro = data['intro'];
+			if(intro == 0) { intro = ''; $('#intro-update-li').removeClass('show') } else { $('#intro-update-li').addClass('show') }
 			$('#intro-update-li').html(intro);
 
-			var mail = $(data).find('mail').text();
-			if(mail == 0) { mail = '';  $('#mail-update-li').removeClass('show') } else { $('#mail-update-li').addClass('show') }
+			var mail = data['mail'];
+			if(mail == 0) { mail = ''; $('#mail-update-li').removeClass('show') } else { $('#mail-update-li').addClass('show') }
 			$('#mail-update-li').html(mail);
 
-
-			var allevents = $(data).find('all-events').text();
-			if(allevents == 0) { allevents = ''; $('#allevents-update').removeClass('show') } else { $('#allevents-update').addClass('show') }
-			$('#allevents-update').html(allevents);
-
-			var alleventstoday = $(data).find('all-events-today').text();
-			if(alleventstoday == 0) { $('#allevents-update').removeClass('notif-allevents-today') } else { $('#allevents-update').addClass('notif-allevents-today') }
-
-			var events = $(data).find('events').text();
-			if(events == 0) { events = ''; $('#events-update').removeClass('show') } else { $('#events-update').addClass('show') }
-			$('#events-update').html(events);
-
-			var eventstoday = $(data).find('events-today').text();
-			if(eventstoday == 0) { $('#events-update').removeClass('notif-events-today') } else { $('#events-update').addClass('notif-events-today') }
-
-			var birthdays = $(data).find('birthdays').text();
-			if(birthdays == 0) {birthdays = ''; $('#birthdays-update').removeClass('show') } else { $('#birthdays-update').addClass('show') }
-			$('#birthdays-update').html(birthdays);
-
-			var birthdaystoday = $(data).find('birthdays-today').text();
-			if(birthdaystoday == 0) { $('#birthdays-update').removeClass('notif-birthdays-today') } else { $('#birthdays-update').addClass('notif-birthdays-today') }
-
 			$(".sidebar-group-li .notify").removeClass("show");
-			$(data).find("group").each(function() {
-				var gid = this.id;
-				var gcount = this.innerHTML;
+			$(data.groups).each(function(key, group) {
+				var gid = group.id;
+				var gcount = group.count;
 				$(".group-"+gid+" .notify").addClass("show").text(gcount);
 			});
 
 			$(".forum-widget-entry .notify").removeClass("show");
-			$(data).find("forum").each(function() {
-				var fid = this.id;
-				var fcount = this.innerHTML;
+			$(data.forums).each(function(key, forum) {
+				var fid = forum.id;
+				var fcount = forum.count;
 				$(".forum-"+fid+" .notify").addClass("show").text(fcount);
 			});
 
-
-			var eNotif = $(data).find('notif')
-
-			if (eNotif.children("note").length==0){
+			if (data.notifications.length == 0) {
 				$("#nav-notifications-menu").html(notifications_empty);
 			} else {
-				nnm = $("#nav-notifications-menu");
+				var nnm = $("#nav-notifications-menu");
 				nnm.html(notifications_all + notifications_mark);
-				//nnm.attr('popup','true');
 
 				var notification_lastitem = parseInt(localStorage.getItem("notification-lastitem"));
 				var notification_id = 0;
-				eNotif.children("note").each(function(){
-					e = $(this);
-					var text = e.text().format("<span class='contactname'>"+e.attr('name')+"</span>");
-					var contact = ("<a href="+e.attr('url')+"><span class='contactname'>"+e.attr('name')+"</span></a>");
-					var seenclass = (e.attr('seen')==1)?"notify-seen":"notify-unseen";
+				$(data.notifications).each(function(key, notif){
+					var text = notif.message.format('<span class="contactname">' + notif.name + '</span>');
+					var contact = ('<a href="' + notif.url + '"><span class="contactname">' + notif.name + '</span></a>');
+					var seenclass = (notif.seen == 1) ? "notify-seen" : "notify-unseen";
 					var html = notifications_tpl.format(
-						e.attr('href'),                     // {0}  // link to the source
-						e.attr('photo'),                    // {1}  // photo of the contact
-						text,                               // {2}  // preformatted text (autor + text)
-						e.attr('date'),                     // {3}  // date of notification (time ago)
-						seenclass,                          // {4}  // visited status of the notification
-						new Date(e.attr('timestamp')*1000), // {5}  // date of notification
-						e.attr('url'),                      // {6}  // profile url of the contact
-						e.text().format(contact),           // {7}  // preformatted html (text including author profile url)
-						''                                  // {8}  // Deprecated
+						notif.href,                     // {0}  // link to the source
+						notif.photo,                    // {1}  // photo of the contact
+						text,                       // {2}  // preformatted text (autor + text)
+						notif.date,                     // {3}  // date of notification (time ago)
+						seenclass,                  // {4}  // visited status of the notification
+						new Date(notif.timestamp*1000), // {5}  // date of notification
+						notif.url,                      // {6}  // profile url of the contact
+						notif.message.format(contact),  // {7}  // preformatted html (text including author profile url)
+						''                          // {8}  // Deprecated
 					);
 					nnm.append(html);
 				});
-				$(eNotif.children("note").get().reverse()).each(function(){
-					e = $(this);
-					notification_id = parseInt(e.attr('timestamp'));
-					if (notification_lastitem!== null && notification_id > notification_lastitem) {
-						if (getNotificationPermission()==="granted") {
+				$(data.notifications.reverse()).each(function(key, e){
+					notification_id = parseInt(e.timestamp);
+					if (notification_lastitem !== null && notification_id > notification_lastitem) {
+						if (getNotificationPermission() === "granted") {
 							var notification = new Notification(document.title, {
-											  body: decodeHtml(e.text().replace('&rarr; ','').format(e.attr('name'))),
-											  icon: e.attr('photo'),
+											  body: decodeHtml(e.message.replace('&rarr; ', '').format(e.name)),
+											  icon: e.photo,
 											 });
-							notification['url'] = e.attr('href');
+							notification['url'] = e.href;
 							notification.addEventListener("click", function(ev){
 								window.location = ev.target.url;
 							});
@@ -303,23 +270,20 @@
 				});
 			}
 
-			notif = eNotif.attr('count');
-			if (notif>0){
+			var notif = data['notify'];
+			if (notif > 0){
 				$("#nav-notifications-linkmenu").addClass("on");
 			} else {
 				$("#nav-notifications-linkmenu").removeClass("on");
 			}
-			if(notif == 0) { notif = ''; $('#notify-update').removeClass('show') } else { $('#notify-update').addClass('show') }
-			$('#notify-update').html(notif);
 
-			var eSysmsg = $(data).find('sysmsgs');
-			eSysmsg.children("notice").each(function(){
-				text = $(this).text();
-				$.jGrowl(text, { sticky: true, theme: 'notice' });
+			console.log(data.sysmsgs);
+
+			$(data.sysmsgs.notice).each(function(key, message){
+				$.jGrowl(message, {sticky: true, theme: 'notice'});
 			});
-			eSysmsg.children("info").each(function(){
-				text = $(this).text();
-				$.jGrowl(text, { sticky: false, theme: 'info', life: 5000 });
+			$(data.sysmsgs.info).each(function(key, message){
+				$.jGrowl(message, {sticky: false, theme: 'info', life: 5000});
 			});
 
 			/* update the js scrollbars */
@@ -374,50 +338,38 @@
 
 	function NavUpdate() {
 
-		if(! stopped) {
-			var pingCmd = 'ping' + ((localUser != 0) ? '?f=&uid=' + localUser : '');
-			$.get(pingCmd,function(data) {
-				$(data).find('result').each(function() {
+		if (!stopped) {
+			var pingCmd = 'ping?format=json' + ((localUser != 0) ? '&f=&uid=' + localUser : '');
+			$.get(pingCmd, function(data) {
+				if (data.result) {
 					// send nav-update event
-					$('nav').trigger('nav-update', this);
-
+					$('nav').trigger('nav-update', data.result);
 
 					// start live update
-
-					if($('#live-network').length)   { src = 'network'; liveUpdate(); }
-					if($('#live-profile').length)   { src = 'profile'; liveUpdate(); }
-					if($('#live-community').length) { src = 'community'; liveUpdate(); }
-					if($('#live-notes').length)     { src = 'notes'; liveUpdate(); }
-					if($('#live-display').length)     { src = 'display'; liveUpdate(); }
-/*					if($('#live-display').length) {
-						if(liking) {
-							liking = 0;
-							window.location.href=window.location.href
+					['network', 'profile', 'community', 'notes', 'display'].forEach(function (src) {
+						if ($('#live-' + src).length) {
+							liveUpdate(src);
 						}
-					}*/
-					if($('#live-photos').length) {
-						if(liking) {
+					});
+					if ($('#live-photos').length) {
+						if (liking) {
 							liking = 0;
-							window.location.href=window.location.href
+							window.location.href = window.location.href;
 						}
 					}
-
-
-
-
-				});
+				}
 			}) ;
 		}
-		timer = setTimeout(NavUpdate,updateInterval);
+		timer = setTimeout(NavUpdate, updateInterval);
 	}
 
-	function liveUpdate() {
+	function liveUpdate(src) {
 		if((src == null) || (stopped) || (! profile_uid)) { $('.like-rotator').hide(); return; }
 		if(($('.comment-edit-text-full').length) || (in_progress)) {
 			if(livetime) {
 				clearTimeout(livetime);
 			}
-			livetime = setTimeout(liveUpdate, 5000);
+			livetime = setTimeout(function() {liveUpdate(src)}, 5000);
 			return;
 		}
 		if(livetime != null)
diff --git a/mod/ping.php b/mod/ping.php
index 0ed7eb3fe..4dc3e8b39 100644
--- a/mod/ping.php
+++ b/mod/ping.php
@@ -3,33 +3,50 @@ require_once("include/datetime.php");
 require_once('include/bbcode.php');
 require_once('include/ForumManager.php');
 require_once('include/group.php');
-require_once("mod/proxy.php");
+require_once('mod/proxy.php');
 require_once('include/xml.php');
 
 function ping_init(&$a) {
 
-	$xmlhead = "<"."?xml version='1.0' encoding='UTF-8' ?".">";
+	$format = 'xml';
+
+	if (isset($_GET['format']) && $_GET['format'] == 'json') {
+		$format = 'json';
+	}
 
 	if (local_user()){
 		// Different login session than the page that is calling us.
 		if (intval($_GET['uid']) && intval($_GET['uid']) != local_user()) {
-		        $data = array("invalid" => 1);
-			header("Content-type: text/xml");
-			echo xml::from_array(array("result" => $data), $xml);
+
+			$data = array('result' => array('invalid' => 1));
+
+			if ($format == 'json') {
+				if (isset($_GET['callback'])) {
+					// JSONP support
+					header("Content-type: application/javascript");
+					echo $_GET['callback'] . '(' . json_encode($data) . ')';
+				} else {
+					header("Content-type: application/json");
+					echo json_encode($data);
+				}
+			} else {
+				header("Content-type: text/xml");
+				echo xml::from_array($data, $xml);
+			}
 			killme();
 		}
 
 		$notifs = ping_get_notifications(local_user());
 		$sysnotify = 0; // we will update this in a moment
 
-		$tags = array();
+		$tags     = array();
 		$comments = array();
-		$likes = array();
+		$likes    = array();
 		$dislikes = array();
-		$friends = array();
-		$posts = array();
-		$regs = array();
-		$mails = array();
+		$friends  = array();
+		$posts    = array();
+		$regs     = array();
+		$mails    = array();
 
 		$home = 0;
 		$network = 0;
@@ -53,36 +70,10 @@ function ping_init(&$a) {
 			call_hooks('network_ping', $arr);
 
 			foreach ($r as $it) {
-
-				if ($it['wall'])
-					$home ++;
-				else
-					$network ++;
-
-				switch($it['verb']){
-					case ACTIVITY_TAG:
-						$obj = parse_xml_string($xmlhead.$it['object']);
-						$it['tname'] = $obj->content;
-						$tags[] = $it;
-						break;
-					case ACTIVITY_LIKE:
-						$likes[] = $it;
-						break;
-					case ACTIVITY_DISLIKE:
-						$dislikes[] = $it;
-						break;
-					case ACTIVITY_FRIEND:
-						$obj = parse_xml_string($xmlhead.$it['object']);
-						$it['fname'] = $obj->title;
-						$friends[] = $it;
-						break;
-					default:
-						if ($it['parent']!=$it['id']) {
-							$comments[] = $it;
-						} else {
-							if (!$it['wall'])
-								$posts[] = $it;
-						}
+				if ($it['wall']) {
+					$home++;
+				} else {
+					$network++;
 				}
 			}
 		}
@@ -90,11 +81,25 @@ function ping_init(&$a) {
 		if ($network) {
 			if (intval(feature_enabled(local_user(),'groups'))) {
 				// Find out how unseen network posts are spread across groups
-				$groups_unseen = groups_count_unseen();
+				$group_counts = groups_count_unseen();
+				if (dbm::is_result($group_counts)) {
+					foreach ($groups_counts as $group_count) {
+						if ($group_count['count'] > 0) {
+							$groups_unseen[] = $group_count;
+						}
+					}
+				}
 			}
 
 			if (intval(feature_enabled(local_user(),'forumlist_widget'))) {
-				$forums_unseen = ForumManager::count_unseen_items();
+				$forum_counts = ForumManager::count_unseen_items();
+				if (dbm::is_result($forums_counts)) {
+					foreach ($forums_counts as $forum_count) {
+						if ($forum_count['count'] > 0) {
+							$forums_unseen[] = $forum_count;
+						}
+					}
+				}
 			}
 		}
 
@@ -120,14 +125,15 @@ function ping_init(&$a) {
 			intval(local_user()),
 			dbesc($myurl)
 		);
-		$mail = count($mails);
+		$mail_count = count($mails);
 
 		if ($a->config['register_policy'] == REGISTER_APPROVE && is_site_admin()){
 			$regs = q("SELECT `contact`.`name`, `contact`.`url`, `contact`.`micro`, `register`.`created`, COUNT(*) as `total` FROM `contact` RIGHT JOIN `register` ON `register`.`uid`=`contact`.`uid` WHERE `contact`.`self`=1");
-			if ($regs)
+			if ($regs) {
 				$register = $regs[0]['total'];
+			}
 		} else {
-			$register = "0";
+			$register = 0;
 		}
 
 		$all_events = 0;
@@ -137,7 +143,6 @@ function ping_init(&$a) {
 		$birthdays = 0;
 		$birthdays_today = 0;
 
-
 		$ev = q("SELECT count(`event`.`id`) as total, type, start, adjust FROM `event`
 			WHERE `event`.`uid` = %d AND `start` < '%s' AND `finish` > '%s' and `ignore` = 0
 			ORDER BY `start` ASC ",
@@ -171,99 +176,71 @@ function ping_init(&$a) {
 			}
 		}
 
-	        $data = array();
-	        $data["intro"] = $intro;
-	        $data["mail"] = $mail;
-	        $data["net"] = $network;
-	        $data["home"] = $home;
-
-		if ($register!=0)
-		        $data["register"] = $register;
-
-		$groups = array();
-
-		if (dbm::is_result($groups_unseen)) {
-			$count = 0;
-			foreach ($groups_unseen as $it)
-				if ($it['count'] > 0) {
-					$count++;
-					$groups[$count.":group"] = $it['count'];
-					$groups[$count.":@attributes"] = array("id" => $it['id']);
-				}
-			$data["groups"] = $groups;
-		}
-
-		$forums = array();
-
-		if (dbm::is_result($forums_unseen)) {
-			$count = 0;
-			foreach ($forums_unseen as $it)
-				if ($it['count'] > 0) {
-					$count++;
-					$forums[$count.":forum"] = $it['count'];
-					$forums[$count.":@attributes"] = array("id" => $it['id']);
-				}
-			$data["forums"] = $forums;
-		}
-
-		$data["all-events"] = $all_events;
-		$data["all-events-today"] = $all_events_today;
-		$data["events"] = $events;
-		$data["events-today"] = $events_today;
-		$data["birthdays"] = $birthdays;
-		$data["birthdays-today"] = $birthdays_today;
+		$data = array();
+		$data['intro']    = $intro;
+		$data['mail']     = $mail_count;
+		$data['net']      = $network;
+		$data['home']     = $home;
+		$data['register'] = $register;
 
+		$data['all-events']       = $all_events;
+		$data['all-events-today'] = $all_events_today;
+		$data['events']           = $events;
+		$data['events-today']     = $events_today;
+		$data['birthdays']        = $birthdays;
+		$data['birthdays-today']  = $birthdays_today;
 
 		if (dbm::is_result($notifs) && !$sysnotify) {
-			foreach ($notifs as $zz) {
-				if ($zz['seen'] == 0)
+			foreach ($notifs as $notif) {
+				if ($notif['seen'] == 0) {
 					$sysnotify ++;
+				}
 			}
 		}
 
 		// merge all notification types in one array
 		if (dbm::is_result($intros)) {
-			foreach ($intros as $i) {
-				$n = array(
-					'href' => $a->get_baseurl().'/notifications/intros/'.$i['id'],
-					'name' => $i['name'],
-					'url' => $i['url'],
-					'photo' => $i['photo'],
-					'date' => $i['datetime'],
-					'seen' => false,
-					'message' => t("{0} wants to be your friend"),
+			foreach ($intros as $intro) {
+				$notif = array(
+					'href'    => $a->get_baseurl() . '/notifications/intros/' . $intro['id'],
+					'name'    => $intro['name'],
+					'url'     => $intro['url'],
+					'photo'   => $intro['photo'],
+					'date'    => $intro['datetime'],
+					'seen'    => false,
+					'message' => t('{0} wants to be your friend'),
 				);
-				$notifs[] = $n;
+				$notifs[] = $notif;
 			}
 		}
 
 		if (dbm::is_result($mails)) {
-			foreach ($mails as $i) {
-				$n = array(
-					'href' => $a->get_baseurl().'/message/'.$i['id'],
-					'name' => $i['from-name'],
-					'url' => $i['from-url'],
-					'photo' => $i['from-photo'],
-					'date' => $i['created'],
-					'seen' => false,
-					'message' => t("{0} sent you a message"),
+			foreach ($mails as $mail) {
+				$notif = array(
+					'href'    => $a->get_baseurl() . '/message/' . $mail['id'],
+					'name'    => $mail['from-name'],
+					'url'     => $mail['from-url'],
+					'photo'   => $mail['from-photo'],
+					'date'    => $mail['created'],
+					'seen'    => false,
+					'message' => t('{0} sent you a message'),
 				);
-				$notifs[] = $n;
+				$notifs[] = $notif;
 			}
 		}
 
 		if (dbm::is_result($regs)) {
-			foreach ($regs as $i) {
-				$n = array(
-					'href' => $a->get_baseurl().'/admin/users/',
-					'name' => $i['name'],
-					'url' => $i['url'],
-					'photo' => $i['micro'],
-					'date' => $i['created'],
-					'seen' => false,
-					'message' => t("{0} requested registration"),
+			foreach ($regs as $reg) {
+				$notif = array(
+					'href'    => $a->get_baseurl() . '/admin/users/',
+					'name'    => $reg['name'],
+					'url'     => $reg['url'],
+					'photo'   => $reg['micro'],
+					'date'    => $reg['created'],
+					'seen'    => false,
+					'message' => t('{0} requested registration'),
 				);
-				$notifs[] = $n;
+				$notifs[] = $notif;
 			}
 		}
 
@@ -279,68 +256,79 @@ function ping_init(&$a) {
 		usort($notifs, $sort_function);
 
 		if (dbm::is_result($notifs)) {
-
-			// Are the nofications calles from the regular process or via the friendica app?
+			// Are the nofications called from the regular process or via the friendica app?
 			$regularnotifications = (intval($_GET['uid']) AND intval($_GET['_']));
 
-			$count = 0;
-			foreach($notifs as $n) {
-				$count++;
-				if ($a->is_friendica_app() OR !$regularnotifications)
-					$n['message'] = str_replace("{0}", $n['name'], $n['message']);
+			foreach ($notifs as $notif) {
+				if ($a->is_friendica_app() OR !$regularnotifications) {
+					$notif['message'] = str_replace("{0}", $notif['name'], $notif['message']);
+				}
 
-				$notifications[$count.":note"] = $n['message'];
+				$contact = get_contact_details_by_url($notif['url']);
+				if (isset($contact['micro'])) {
+					$notif['photo'] = proxy_url($contact['micro'], false, PROXY_SIZE_MICRO);
+				} else {
+					$notif['photo'] = proxy_url($notif['photo'], false, PROXY_SIZE_MICRO);
+				}
 
-				$contact = get_contact_details_by_url($n['url']);
-				if (isset($contact["micro"]))
-					$n['photo'] = proxy_url($contact["micro"], false, PROXY_SIZE_MICRO);
-				else
-					$n['photo'] = proxy_url($n['photo'], false, PROXY_SIZE_MICRO);
-
-				$local_time = datetime_convert('UTC',date_default_timezone_get(),$n['date']);
-
-				call_hooks('ping_xmlize', $n);
-
-				$notifications[$count.":@attributes"] = array("id" => $n["id"],
-										"href" => $n['href'],
-										"name" => $n['name'],
-										"url" => $n['url'],
-										"photo" => $n['photo'],
-										"date" => relative_date($n['date']),
-										"seen" => $n['seen'],
-										"timestamp" => strtotime($local_time));
+				$local_time = datetime_convert('UTC', date_default_timezone_get(), $notif['date']);
 
+				$notifications[] = array(
+					'id'        => $notif['id'],
+					'href'      => $notif['href'],
+					'name'      => $notif['name'],
+					'url'       => $notif['url'],
+					'photo'     => $notif['photo'],
+					'date'      => relative_date($notif['date']),
+					'message'   => $notif['message'],
+					'seen'      => $notif['seen'],
+					'timestamp' => strtotime($local_time)
+				);
 			}
 		}
-
-		$data["notif"] = $notifications;
-		$data["@attributes"] = array("count" => $sysnotify + $intro + $mail + $register);
 	}
 
-	$sysmsg = array();
+	$sysmsgs = array();
+	$sysmsgs_info = array();
 
-	if (x($_SESSION,'sysmsg')){
-		$count = 0;
-		foreach ($_SESSION['sysmsg'] as $m){
-			$count++;
-			$sysmsg[$count.":notice"] = $m;
-		}
+	if (x($_SESSION,'sysmsg')) {
+		$sysmsgs = $_SESSION['sysmsg'];
 		unset($_SESSION['sysmsg']);
 	}
 
-	if (x($_SESSION,'sysmsg_info')){
-		$count = 0;
-		foreach ($_SESSION['sysmsg_info'] as $m){
-			$count++;
-			$sysmsg[$count.":info"] = $m;
-		}
+	if (x($_SESSION,'sysmsg_info')) {
+		$sysmsgs_info = $_SESSION['sysmsg_info'];
 		unset($_SESSION['sysmsg_info']);
 	}
 
-	$data["sysmsgs"] = $sysmsg;
+	if ($format == 'json') {
+		$data['groups'] = $groups_unseen;
+		$data['forums'] = $forums_unseen;
+		$data['notify'] = $sysnotify + $intro + $mail_count + $register;
+		$data['notifications'] = $notifications;
+		$data['sysmsgs'] = array(
+			'notice' => $sysmsgs,
+			'info' => $sysmsgs_info
+		);
+
+		$json_payload = json_encode(array("result" => $data));
+
+		if (isset($_GET['callback'])) {
+			// JSONP support
+			header("Content-type: application/javascript");
+			echo $_GET['callback'] . '(' . $json_payload . ')';
+		} else {
+			header("Content-type: application/json");
+			echo $json_payload;
+		}
+	} else {
+		// Legacy slower XML format output
+		$data = ping_format_xml_data($data, $sysnotify, $notifications, $sysmsgs, $sysmsgs_info, $groups_unseen, $forums_unseen);
+
+		header("Content-type: text/xml");
+		echo xml::from_array(array("result" => $data), $xml);
+	}
 
-	header("Content-type: text/xml");
-	echo xml::from_array(array("result" => $data), $xml);
 	killme();
 }
 
@@ -422,3 +410,68 @@ function ping_get_notifications($uid) {
 
 	return($result);
 }
+
+/**
+ * @brief Backward-compatible XML formatting for ping.php output
+ * @deprecated
+ *
+ * @param array $data The initial ping data array
+ * @param int $sysnotify Number of unseen system notifications
+ * @param array $notifs Complete list of notification
+ * @param array $sysmsgs List of system notice messages
+ * @param array $sysmsgs_info List of system info messages
+ * @return array XML-transform ready data array
+ */
+function ping_format_xml_data($data, $sysnotify, $notifs, $sysmsgs, $sysmsgs_info, $groups_unseen, $forums_unseen) {
+	$notifications = array();
+	foreach($notifs as $key => $n) {
+		$notifications[$key . ":note"] = $n['message'];
+
+		$notifications[$key . ":@attributes"] = array(
+			"id" => $n["id"],
+			"href" => $n['href'],
+			"name" => $n['name'],
+			"url" => $n['url'],
+			"photo" => $n['photo'],
+			"date" => $n['date'],
+			"seen" => $n['seen'],
+			"timestamp" => $n['timestamp']
+		);
+	}
+
+	$sysmsg = array();
+	foreach ($sysmsgs as $key => $m){
+		$sysmsg[$key . ":notice"] = $m;
+	}
+	foreach ($sysmsgs_info as $key => $m){
+		$sysmsg[$key . ":info"] = $m;
+	}
+
+	$data["notif"] = $notifications;
+	$data["@attributes"] = array("count" => $sysnotify + $data["intro"] + $data["mail"] + $data["register"]);
+	$data["sysmsgs"] = $sysmsg;
+
+	if ($data["register"] == 0) {
+		unset($data["register"]);
+	}
+
+	$groups = array();
+	if (count($groups_unseen)) {
+		foreach ($groups_unseen as $key => $item) {
+			$groups[$key . ':group'] = $item['count'];
+			$groups[$key . ':@attributes'] = array('id' => $item['id']);
+		}
+		$data['groups'] = $groups;
+	}
+
+	$forums = array();
+	if (count($forums_unseen)) {
+		foreach ($forums_unseen as $key => $item) {
+			$forums[$count . ':forum'] = $item['count'];
+			$forums[$count . ':@attributes'] = array('id' => $item['id']);
+		}
+		$data['forums'] = $forums;
+	}
+
+	return $data;
+}
\ No newline at end of file