Working gateway

Change-Id: I8ca690fe9d1b7f8e20b438df1ddd48d6b2f99326
diff --git a/src/config/config.js b/src/config/config.js
new file mode 100644
index 0000000..2671a26
--- /dev/null
+++ b/src/config/config.js
@@ -0,0 +1,37 @@
+(function () {
+  'use strict';
+  
+  // NOTE do we still need CLI args? 
+  // Won't be better to use NODE_ENV and the native node-yaml-config feature
+
+  const argv = require('yargs').argv;
+  const path = require('path');
+  const yaml_config = require('node-yaml-config');
+  const logger = require('../config/logger.js');
+
+  // if a config file is specified in as a CLI arguments use that one
+  const cfgFile = argv.config || 'config.yml';
+
+  let config;
+  try {
+    logger.log('debug', `Loading ${cfgFile}`);
+    config = yaml_config.load(path.join(__dirname, cfgFile));
+  }
+  catch(e) {
+    logger.log('debug', `No ${cfgFile} found, using default params`);
+  }
+
+  module.exports = {
+    xos: {
+      host: (config && config.xos) ? config.xos.host : 'xos',
+      port: (config && config.xos) ? config.xos.port : 9999
+    },
+    redis: {
+      host: (config && config.redis) ? config.redis.host : 'redis',
+      port: (config && config.redis) ? config.redis.port : 6379
+    },
+    gateway: {
+      port: (config && config.gateway) ? config.gateway.port : 3000
+    }
+  };
+})();
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diff --git a/src/config/logger.js b/src/config/logger.js
new file mode 100644
index 0000000..df49409
--- /dev/null
+++ b/src/config/logger.js
@@ -0,0 +1,34 @@
+(function () {
+  'use strict';
+  
+  const winston = require('winston');
+  const fs = require('fs');
+  const path = require('path');
+  const level = process.env.LOG_LEVEL || 'warn';
+  winston.level = level;
+
+  const logFile = path.join(__dirname, '../../logs/xos-nb-rest');
+
+  // clear old logs
+  ['error', 'debug'].forEach(l => {
+    try {
+      fs.statSync(`${logFile}.${l}.log`)
+      fs.unlinkSync(`${logFile}.${l}.log`);
+    }
+    catch(e) {
+      // log does not exist
+    }
+  });
+
+  // create a custom logger with colorized console and persistance to file
+  const logger = new (winston.Logger)({
+    transports: [
+      new (winston.transports.Console)({level: level, colorize: true}),
+      new (winston.transports.File)({name: 'error-log', level: 'error', filename: `${logFile}.error.log`}),
+      new (winston.transports.File)({name: 'debug-log', level: 'debug', filename: `${logFile}.debug.log`})
+    ]
+  });
+
+  module.exports = logger;
+
+})();
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