Fixes #3852

Added meta data to user profile pages, and also added noEscape
option to meta tag input. If set, validator escaping won't be
run on that value.

src/controllers/accounts/profile.js

@@ -2,6 +2,7 @@
 
 var nconf = require('nconf'),
 	async = require('async'),
+	S = require('string'),
 
 	user = require('../../user'),
 	posts = require('../../posts'),
@@ -80,6 +81,42 @@ profileController.get = function(req, res, callback) {
 				userData.profileviews = 1;
 			}
 
+			var plainAboutMe = S(userData.aboutme).decodeHTMLEntities().stripTags().s;
+
+			res.locals.metaTags = [
+				{
+					name: "title",
+					content: userData.fullname || userData.username
+				},
+				{
+					name: "description",
+					content: plainAboutMe
+				},
+				{
+					property: 'og:title',
+					content: userData.fullname || userData.username
+				},
+				{
+					property: 'og:description',
+					content: plainAboutMe
+				}
+			];
+
+			if (userData.picture) {
+				res.locals.metaTags.push(
+					{
+						property: 'og:image',
+						content: userData.picture,
+						noEscape: true
+					},
+					{
+						property: "og:image:url",
+						content: userData.picture,
+						noEscape: true
+					}
+				);
+			}
+
 			plugins.fireHook('filter:user.account', {userData: userData, uid: req.uid}, next);
 		}
 	], function(err, results) {

src/controllers/topics.js

@@ -203,15 +203,18 @@ topicsController.get = function(req, res, callback) {
 				},
 				{
 					property: "og:url",
-					content: nconf.get('url') + '/topic/' + topicData.slug + (req.params.post_index ? ('/' + req.params.post_index) : '')
+					content: nconf.get('url') + '/topic/' + topicData.slug + (req.params.post_index ? ('/' + req.params.post_index) : ''),
+					noEscape: true
 				},
 				{
 					property: 'og:image',
-					content: ogImageUrl
+					content: ogImageUrl,
+					noEscape: true
 				},
 				{
 					property: "og:image:url",
-					content: ogImageUrl
+					content: ogImageUrl,
+					noEscape: true
 				},
 				{
 					property: "article:published_time",

src/meta/tags.js

@@ -32,10 +32,12 @@ module.exports = function(Meta) {
 					content: Meta.config.keywords || ''
 				}, {
 					name: 'msapplication-badge',
-					content: 'frequency=30; polling-uri=' + nconf.get('url') + '/sitemap.xml'
+					content: 'frequency=30; polling-uri=' + nconf.get('url') + '/sitemap.xml',
+					noEscape: true
 				}, {
 					name: 'msapplication-square150x150logo',
-					content: Meta.config['brand:logo'] || ''
+					content: Meta.config['brand:logo'] || '',
+					noEscape: true
 				}];
 				plugins.fireHook('filter:meta.getMetaTags', defaultTags, next);
 			},
@@ -89,7 +91,10 @@ module.exports = function(Meta) {
 					return tag;
 				}
 
+				if (!tag.noEscape) {
 					tag.content = validator.escape(tag.content);
+				}
+
 				return tag;
 			});