From 31c0bccb9a92356bea7665f948fc7872bc95f36b Mon Sep 17 00:00:00 2001
From: UzverNumber47 <dm.borisevich@gmail.com>
Date: Wed, 3 May 2017 12:18:07 +0300
Subject: [PATCH] feat(index): add getFileReadStreamById method

You need this method to get a stream on server. Just by call it without creating db connection and GridFS.
---
 lib/index.js        | 15 ++++++++++-----
 source/index.coffee |  9 ++++++---
 2 files changed, 16 insertions(+), 8 deletions(-)

diff --git a/lib/index.js b/lib/index.js
index cefce38..99691d9 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -220,15 +220,20 @@ MongoStorage = (function() {
     }, callback);
   };
 
+  MongoStorage.prototype.getFileReadStreamById = function(id) {
+    var gfs;
+    gfs = Grid(this.db, mongodb);
+    return gfs.createReadStream({
+      _id: id
+    });
+  };
+
   MongoStorage.prototype.__download = function(file, res, callback) {
-    var gfs, read;
+    var read;
     if (callback == null) {
       callback = (function() {});
     }
-    gfs = Grid(this.db, mongodb);
-    read = gfs.createReadStream({
-      _id: file._id
-    });
+    read = this.getFileReadStreamById(file._id);
     res.set('Content-Disposition', "attachment; filename=\"" + file.filename + "\"");
     res.set('Content-Type', file.metadata.mimetype);
     res.set('Content-Length', file.length);
diff --git a/source/index.coffee b/source/index.coffee
index 15fa451..5b130bd 100644
--- a/source/index.coffee
+++ b/source/index.coffee
@@ -155,10 +155,13 @@ class MongoStorage
   getFileById: (id, callback) ->
     @__getFile _id: id, callback
 
-  __download: (file, res, callback = (-> return)) ->
+  getFileReadStreamById: (id) ->
     gfs = Grid @db, mongodb
-    read = gfs.createReadStream
-      _id: file._id
+    gfs.createReadStream
+      _id: id
+
+  __download: (file, res, callback = (-> return)) ->
+    read = @getFileReadStreamById file._id
     res.set 'Content-Disposition', "attachment; filename=\"#{file.filename}\""
     res.set 'Content-Type', file.metadata.mimetype
     res.set 'Content-Length', file.length