fix: #7385 better handling for errors in Adv>Databases

public/language/en-GB/admin/advanced/database.json

@@ -22,6 +22,7 @@
 	"mongo.bytes-out": "Bytes Out",
 	"mongo.num-requests": "Number of Requests",
 	"mongo.raw-info": "MongoDB Raw Info",
+	"mongo.unauthorized": "NodeBB was unable to query the MongoDB database for relevant statistics. Please ensure that the user in use by NodeBB contains the "clusterMonitor" role for the "admin" database.",
 
 	"redis": "Redis",
 	"redis.version": "Redis Version",

src/controllers/admin/database.js

@@ -5,7 +5,7 @@ var nconf = require('nconf');
 
 var databaseController = module.exports;
 
-databaseController.get = function (req, res, next) {
+databaseController.get = function (req, res) {
 	async.waterfall([
 		function (next) {
 			async.parallel({
@@ -35,8 +35,15 @@ databaseController.get = function (req, res, next) {
 				},
 			}, next);
 		},
-		function (results) {
-			res.render('admin/advanced/database', results);
-		},
-	], next);
+	], function (err, results) {
+		Object.assign(results, { error: err });
+
+		// Override mongo error with more human-readable error
+		if (err.name === 'MongoError' && err.codeName === 'Unauthorized') {
+			err.friendlyMessage = '[[admin/advanced/database:mongo.unauthorized]]';
+			delete results.mongo;
+		}
+
+		res.render('admin/advanced/database', results);
+	});
 };

src/views/admin/advanced/database.tpl

@@ -1,5 +1,12 @@
 <div class="row database">
 	<div class="col-sm-9">
+		<!-- IF error -->
+		<div class="alert alert-warning">
+			{error.friendlyMessage}
+			<hr />
+			<code>{error.errmsg}</code>
+		</div>
+		<!-- END -->
 		<!-- IF mongo -->
 		<div class="panel panel-default">
 			<div class="panel-heading"><i class="fa fa-hdd-o"></i> [[admin/advanced/database:mongo]]</div>