logger jshint

src/logger.js

@@ -1,3 +1,5 @@
+'use strict';
+
 /*
  * Logger module: ability to dynamically turn on/off logging for http requests & socket.io events
  */
@@ -34,25 +36,22 @@ var opts = {
 		opts.express.app = app;
 		/* Open log file stream & initialize express logging if meta.config.logger* variables are set */
 		Logger.setup();
-	}
+	};
 
 	Logger.setup = function() {
 		Logger.setup_one('loggerPath', meta.config.loggerPath);
-	}
+	};
 
 	Logger.setup_one = function(key, value) {
 		/*
 		 * 1. Open the logger stream: stdout or file
 		 * 2. Re-initialize the express logger hijack
 		 */
-		switch(key) {
-			case 'loggerPath': {
+		if (key === 'loggerPath') {
 			Logger.setup_one_log(value);
 			Logger.express_open();
 		}
-			default: return;
-		}
-	}
+	};
 
 	Logger.setup_one_log = function(value) {
 		/*
@@ -61,20 +60,23 @@ var opts = {
 		 */
 		if(meta.config.loggerStatus > 0 || meta.config.loggerIOStatus) {
 			var stream = Logger.open(value);
-			if(stream) opts.streams.log.f = stream;
-			else opts.streams.log.f = process.stdout;
+			if(stream) {
+				opts.streams.log.f = stream;
+			} else {
+				opts.streams.log.f = process.stdout;
+			}
 		}
 		else {
 			Logger.close(opts.streams.log);
 		}
-	}
+	};
 
 	Logger.open = function(value) {
 		/* Open the streams to log to: either a path or stdout */
 		var stream;
 		if(value) {
 			if(fs.existsSync(value)) {
-				stats = fs.statSync(value);
+				var stats = fs.statSync(value);
 				if(stats) {
 					if(stats.isDirectory()) {
 						stream = fs.createWriteStream(path.join(value, 'nodebb.log'), {flags: 'a'});
@@ -96,12 +98,14 @@ var opts = {
 			stream = process.stdout;
 		}
 		return stream;
-	}
+	};
 
 	Logger.close = function(stream) {
-		if(stream.f != process.stdout && stream.f != null) stream.end();
-		stream.f = null;
+		if(stream.f !== process.stdout && stream.f) {
+			stream.end();
 		}
+		stream.f = null;
+	};
 
 	Logger.monitorConfig = function(socket, data) {
 		/*
@@ -110,10 +114,10 @@ var opts = {
 		Logger.setup_one(data.key,data.value);
 		Logger.io_close(socket);
 		Logger.io(socket);
-	}
+	};
 
 	Logger.express_open = function() {
-		if(opts.express.set != 1) {
+		if(opts.express.set !== 1) {
 			opts.express.set = 1;
 			opts.express.app.use(Logger.expressLogger);
 		}
@@ -121,7 +125,7 @@ var opts = {
 		 * Always initialize "ofn" (original function) with the original logger function
 		 */
 		opts.express.ofn = express.logger({stream : opts.streams.log.f});
-	}
+	};
 
 	Logger.expressLogger = function(req,res,next) {
 		/*
@@ -134,7 +138,7 @@ var opts = {
 		} else {
 			return next();
 		}
-	}
+	};
 
 	Logger.prepare_io_string = function(_type, _uid, _args) {
 		/*
@@ -145,82 +149,74 @@ var opts = {
 		try {
 			return 'io: '+_uid+' '+_type+' '+util.inspect(Array.prototype.slice.call(_args))+'\n';
 		} catch(err) {
-			winston.info("Logger.prepare_io_string: Failed",err)
+			winston.info("Logger.prepare_io_string: Failed", err);
 			return "error";
 		}
-	}
+	};
 
 	Logger.io_close = function(socket) {
 		/*
 		 * Restore all hijacked sockets to their original emit/on functions
 		 */
 		var clients = socket.io.sockets.clients();
-		for(var v in clients) {
-			var client = clients[v];
-
-			if(client.oEmit != undefined && client.oEmit != client.emit) {
+		clients.forEach(function(client) {
+			if(client.oEmit && client.oEmit !== client.emit) {
 				client.emit = client.oEmit;
 			}
 
-			if(client.$oEmit != undefined && client.$oEmit != client.$emit) {
+			if(client.$oEmit && client.$oEmit !== client.$emit) {
 				client.$emit = client.$oEmit;
 			}
-		}
-	}
+		});
+	};
 
 	Logger.io = function(socket) {
 		/*
 		 * Go through all of the currently established sockets & hook their .emit/.on
 		 */
-		if(socket == undefined && socket.io.sockets == undefined) {
+		if(!socket && !socket.io.sockets) {
 			return;
 		}
 
 		var clients = socket.io.sockets.clients();
-		for(var v in clients) {
-			var client = clients[v];
-			Logger.io_one(client,client.state.user.uid);
-		}
-	}
+
+		clients.forEach(function(client) {
+			Logger.io_one(client, client.uid);
+		});
+	};
 
 	Logger.io_one = function(socket, uid) {
 		/*
 		 * This function replaces a socket's .emit/.on functions in order to intercept events
 		 */
-		if(socket != undefined && meta.config.loggerIOStatus > 0) {
+		if(socket && meta.config.loggerIOStatus > 0) {
 
 			(function() {
-				// courtesy of: http://stackoverflow.com/a/9674248
-				var user = uid
-				if(!user) user = "?"
-				socket.oEmit = socket.emit;
-				var emit = socket.emit;
-				socket.emit = function() {
-					if(opts.streams.log.f != null) {
-						opts.streams.log.f.write(Logger.prepare_io_string("emit", uid, arguments));
+				function override(method, name, errorMsg) {
+					return function() {
+						if(opts.streams.log.f) {
+							opts.streams.log.f.write(Logger.prepare_io_string(name, uid, arguments));
 						}
 
 						try {
-						emit.apply(socket, arguments);
+							method.apply(socket, arguments);
 						} catch(err) {
-						winston.info("Logger.io_one: emit.apply: Failed", err);
+							winston.info(errorMsg, err);
 						}
 					};
+				}
+
+				// courtesy of: http://stackoverflow.com/a/9674248
+				socket.oEmit = socket.emit;
+				var emit = socket.emit;
+				socket.emit = override(emit, 'emit', 'Logger.io_one: emit.apply: Failed');
+
 				socket.$oEmit = socket.$emit;
 				var $emit = socket.$emit;
-				socket.$emit = function() {
+				socket.$emit = override($emit, 'on', 'Logger.io_one: $emit.apply: Failed');
 
-					if(opts.streams.log.f != null) {
-						opts.streams.log.f.write(Logger.prepare_io_string("on",uid,arguments));
-					}
-					try {
-						$emit.apply(socket, arguments);
-					} catch(err) {
-						winston.info("Logger.io_one: $emit.apply: Failed", err);
-					}
-				};
 			})();
 		}
-	}
+	};
 
 }(exports));