Add logging solution

config.js

@@ -3,6 +3,7 @@ var defaultConfig = {
   // DEFAULT network (livenet or testnet)
   networkName: 'testnet',
   forceNetwork: false,
+  logLevel: 'debug',
 
   // DEFAULT unit: Bit
   unitName: 'bits',

js/log.js

@@ -0,0 +1,45 @@
+var config = require('../config');
+
+var Logger = function(name) {
+  this.name = name || 'log';
+  this.level = 2;
+};
+
+var levels = {
+  'debug': 0,
+  'info': 1,
+  'log': 2,
+  'warn': 3,
+  'error': 4,
+  'fatal': 5
+};
+
+for (_level in levels) {
+  (function(level) {
+    Logger.prototype[level] = function() {
+      if (levels[level] >= levels[this.level]) {
+        var str = '[' + level + '] ' + this.name + ': ' + arguments[0],
+          extraArgs,
+        extraArgs = [].slice.call(arguments, 1);
+        if (console[level]) {
+          extraArgs.unshift(str);
+          console[level].apply(console, extraArgs);
+        } else {
+          if (extraArgs.length) {
+            str += JSON.stringify(extraArgs);
+          }
+          console.log(str);
+        }
+      }
+    };
+  })(_level);
+}
+
+Logger.prototype.setLevel = function(level) {
+  this.level = level;
+}
+
+var logger = new Logger('copay');
+logger.setLevel(config.logLevel);
+
+module.exports.logger = logger;

js/models/network/Async.js

@@ -2,6 +2,7 @@
 
 var EventEmitter = require('events').EventEmitter;
 var bitcore = require('bitcore');
+var log = require('../../log');
 var AuthMessage = bitcore.AuthMessage;
 var util = bitcore.util;
 var nodeUtil = require('util');
@@ -187,7 +188,7 @@ Network.prototype._onMessage = function(enc) {
     return;
   }
 
-  //console.log('receiving ' + JSON.stringify(payload));
+  log.debug('receiving ' + JSON.stringify(payload));
 
   var self = this;
   switch (payload.type) {
@@ -234,8 +235,8 @@ Network.prototype._setupConnectionHandlers = function(cb) {
 };
 
 Network.prototype._onError = function(err) {
-  console.log('RECV ERROR: ', err);
-  console.log(err.stack);
+  log.debug('RECV ERROR: ', err);
+  log.debug(err.stack);
   this.criticalError = err.message;
 };
 
@@ -348,7 +349,7 @@ Network.prototype.send = function(dest, payload, cb) {
     var to = dest[ii];
     if (to == this.copayerId)
       continue;
-    //console.log('SEND to: ' + to, this.copayerId, payload);
+    log.debug('SEND to: ' + to, this.copayerId, payload);
     var message = this.encode(to, payload);
     this.socket.emit('message', message);
   }