Allow logger to add transports (#2363)

- Move all of the winston logic from FileLoggerAdapter to WinstonLoggerAdapter
- Export WinstonLoggerAdapter so it can be sublcassed
- Expost the ability to add adittional transports to logger
- Import FirehoseLoggerAdapter alongside other adapters so it can be configured.

src/Adapters/Logger/LoggerAdapter.js

@@ -6,7 +6,7 @@
 // * info(obj1 [, obj2, .., objN])
 // * error(obj1 [, obj2, .., objN])
 // * query(options, callback)
-// Default is FileLoggerAdapter.js
+// Default is WinstonLoggerAdapter.js
 
 export class LoggerAdapter {
   info() {}

src/Adapters/Logger/WinstonLoggerAdapter.js

@@ -1,23 +1,9 @@
-// Logger
-//
-// Wrapper around Winston logging library with custom query
-//
-// expected log entry to be in the shape of:
-// {"level":"info","message":"Your Message","timestamp":"2016-02-04T05:59:27.412Z"}
-//
 import { LoggerAdapter } from './LoggerAdapter';
-import { Parse } from 'parse/node';
-import { logger, configure } from '../../logger';
+import { logger, addTransport } from '../../logger';
 
 const MILLISECONDS_IN_A_DAY = 24 * 60 * 60 * 1000;
 const CACHE_TIME = 1000 * 60;
 
-let LOGS_FOLDER = './logs/';
-
-if (typeof process !== 'undefined' && process.env.NODE_ENV === 'test') {
-  LOGS_FOLDER = './test_logs/'
-}
-
 let currentDate = new Date();
 
 let simpleCache = {
@@ -65,8 +51,7 @@ let _isValidLogEntry = (from, until, entry) => {
     : false
 };
 
-export class FileLoggerAdapter extends LoggerAdapter {
-
+export class WinstonLoggerAdapter extends LoggerAdapter {
   info() {
     return logger.info.apply(undefined, arguments);
   }
@@ -75,6 +60,13 @@ export class FileLoggerAdapter extends LoggerAdapter {
     return logger.error.apply(undefined, arguments);
   }
 
+  addTransport(transport) {
+    // Note that this is calling addTransport
+    // from logger.  See import - confusing.
+    // but this is not recursive.
+    addTransport(transport);
+  }
+
   // custom query as winston is currently limited
   query(options, callback = () => {}) {
     if (!options) {
@@ -114,4 +106,4 @@ export class FileLoggerAdapter extends LoggerAdapter {
   }
 }
 
-export default FileLoggerAdapter;
+export default WinstonLoggerAdapter;