improved logger behaviour and updated default configuration

lib/log.js

@@ -14,6 +14,7 @@ var messageTemplate = function (type, time, tag, info) {
 };
 
 var write = function (ctx, content) {
+    if (!ctx.store) { return; }
     ctx.store.log(ctx.channelName, content);
 };
 
@@ -44,7 +45,12 @@ var handlers = {
     }
 };
 
+var noop = function () {};
+
 var createLogType = function (ctx, type) {
+    if (logLevels.indexOf(type) < logLevels.indexOf(ctx.logLevel)) {
+        return noop;
+    }
     return function (tag, info) {
         var time = new Date().toISOString();
         var content;
@@ -53,7 +59,6 @@ var createLogType = function (ctx, type) {
         } catch (e) {
             return;
         }
-
         if (ctx.logToStdout && typeof(handlers[type]) === 'function') {
             handlers[type](ctx, time, tag, info);
         }
@@ -61,17 +66,29 @@ var createLogType = function (ctx, type) {
     };
 };
 
-// Log.verbose('THING', x);
+var createMethods = function (ctx) {
+    var log = {};
+    logLevels.forEach(function (type) {
+        log[type] = createLogType(ctx, type);
+    });
+    return log;
+};
+
 Logger.create = function (config, cb) {
-    if (!config.logPath) {
-        // XXX don't crash, print that you won't log to file
-        throw new Error("Logger: Expected filePath");
+    if (typeof(config.logLevel) !== 'string') {
+        config.logLevel = 'info';
     }
 
-    /* config: {
-        filePath: '???',
-        logLevel: 'silly',
-    } */
+    var ctx = {
+        channelName: launchTime,
+        logFeedback: Boolean(config.logFeedback),
+        logLevel: config.logLevel,
+    };
+
+    if (!config.logPath) {
+        console.log("No logPath configured. Logging to file disabled");
+        return void cb(Object.freeze(createMethods(ctx)));
+    }
 
     var date = new Date();
     var launchTime = ('' + date.getUTCFullYear()).slice(-2) + date.toISOString();
@@ -79,20 +96,8 @@ Logger.create = function (config, cb) {
     Store.create({
         filePath: config.logPath,
     }, function (store) {
-        var ctx = {
-            store: store,
-            channelName: launchTime,
-            logFeedback: Boolean(config.logFeedback),
-    // TODO respect configured log settings
-            logLevel: logLevels.indexOf(config.logLevel), // 0 for silly, 1 for debug
-        };
-
-        var log = {};
-        logLevels.forEach(function (type) {
-            log[type] = createLogType(ctx, type);
-        });
-
-        cb(Object.freeze(log));
+        ctx.store = store;
+        cb(Object.freeze(createMethods(ctx)));
     });
 };