on config save update meta.config on all workers

also dont make 20 socket.emit calls for each setting field, everything
will be send in 1 socket call.

loader.js

@@ -76,7 +76,8 @@ Loader.init = function() {
 					break;
 					case 'user:connect':
 					case 'user:disconnect':
-						notifyWorkers(worker, message);
+					case 'config:update':
+						notifyWorkers(message);
 					break;
 				}
 			}
@@ -87,7 +88,7 @@ Loader.init = function() {
 		console.log('[cluster] Child Process (' + worker.process.pid + ') listening for connections.');
 	});
 
-	function notifyWorkers(currentWorker, msg) {
+	function notifyWorkers(msg) {
 		Object.keys(cluster.workers).forEach(function(id) {
 			cluster.workers[id].send(msg);
 		});

public/src/forum/admin/settings.js

@@ -61,21 +61,9 @@ define('forum/admin/settings', ['uploader', 'sounds'], function(uploader, sounds
 
 		saveBtn.off('click').on('click', function(e) {
 			e.preventDefault();
-			var done = 0,
-				error;
 
-			for (x = 0; x < numFields; x++) {
-				saveField(fields[x], onFieldSaved);
-			}
-
-			function onFieldSaved(err) {
-				if (!error && err) {
-					error = err;
-				}
-
-				done++;
-				if (done === numFields) {
-					if (error) {
+			saveFields(fields, function onFieldsSaved(err) {
+				if (err) {
 					return app.alert({
 						alert_id: 'config_status',
 						timeout: 2500,
@@ -91,8 +79,7 @@ define('forum/admin/settings', ['uploader', 'sounds'], function(uploader, sounds
 					message: 'Your changes to the NodeBB configuration have been saved.',
 					type: 'success'
 				});
-				}
-			}
+			});
 		});
 
 		handleUploads();
@@ -131,8 +118,11 @@ define('forum/admin/settings', ['uploader', 'sounds'], function(uploader, sounds
 		socket.emit('admin.config.remove', key);
 	};
 
-	function saveField(field, callback) {
-		field = $(field);
+	function saveFields(fields, callback) {
+		var data = {};
+
+		fields.each(function() {
+			var field = $(this);
 			var key = field.attr('data-field'),
 				value, inputType;
 
@@ -155,14 +145,23 @@ define('forum/admin/settings', ['uploader', 'sounds'], function(uploader, sounds
 				value = field.val();
 			}
 
-		socket.emit('admin.config.set', {
-			key: key,
-			value: value
-		}, function(err) {
-			if(!err && app.config[key] !== undefined) {
-				app.config[key] = value;
+			data[key] = value;
+		});
+
+		socket.emit('admin.config.setMultiple', data, function(err) {
+			if (err) {
+				return callback(err);
 			}
-			callback(err);
+
+			if (app.config) {
+				for(var field in data) {
+					if (data.hasOwnProperty(field)) {
+						app.config[field] = data[field];
+					}
+				}
+			}
+
+			callback();
 		});
 	}
 

src/meta/configs.js

@@ -43,15 +43,54 @@ module.exports = function(Meta) {
 			return callback(new Error('invalid config field'));
 		}
 
-		db.setObjectField('config', field, value, function(err, res) {
-			if (!err && Meta.config) {
-				Meta.config[field] = value;
+		db.setObjectField('config', field, value, function(err) {
+			if (err) {
+				return callback(err);
 			}
+			var data = {};
+			data[field] = value;
+			updateConfig(data);
 
-			callback(err, res);
+			callback();
 		});
 	};
 
+	Meta.configs.setMultiple = function(data, callback) {
+		db.setObject('config', data, function(err) {
+			if (err) {
+				return callback(err);
+			}
+
+			updateConfig(data);
+			callback();
+		});
+	};
+
+	function updateConfig(data) {
+		var msg = {action: 'config:update', data: data};
+		if (process.send) {
+			process.send(msg);
+		} else {
+			onMessage(msg);
+		}
+	}
+
+	process.on('message', onMessage);
+
+	function onMessage(msg) {
+		if (typeof msg !== 'object') {
+			return;
+		}
+
+		if (msg.action === 'config:update' && Meta.config) {
+			for(var field in msg.data) {
+				if(msg.data.hasOwnProperty(field)) {
+					Meta.config[field] = msg.data[field];
+				}
+			}
+		}
+	}
+
 	Meta.configs.setOnEmpty = function (field, value, callback) {
 		Meta.configs.get(field, function (err, curValue) {
 			if (err) {

src/socket.io/admin.js

@@ -74,7 +74,7 @@ SocketAdmin.themes.set = function(socket, data, callback) {
 			callback();
 		});
 	};
-	if (data.type == 'bootswatch') {
+	if (data.type === 'bootswatch') {
 		wrappedCallback();
 	} else {
 		widgets.reset(wrappedCallback);
@@ -126,6 +126,31 @@ SocketAdmin.config.set = function(socket, data, callback) {
 	});
 };
 
+SocketAdmin.config.setMultiple = function(socket, data, callback) {
+	if(!data) {
+		return callback(new Error('[[error:invalid-data]]'));
+	}
+
+	meta.configs.setMultiple(data, function(err) {
+		if(err) {
+			return callback(err);
+		}
+
+		callback();
+		var setting;
+		for(var field in data) {
+			if (data.hasOwnProperty(field)) {
+				setting = {
+					key: field,
+					value: data[field]
+				};
+				plugins.fireHook('action:config.set', setting);
+				logger.monitorConfig({io: index.server}, setting);
+			}
+		}
+	});
+};
+
 SocketAdmin.config.remove = function(socket, key) {
 	meta.configs.remove(key);
 };