Add GridFS as default avatar storage

lib/file.coffee

-uploadPath = "/var/www/rocket.chat/uploads"
+storeType = 'GridFS'
+if Meteor.settings?.public?.avatarStore?.type?
+	storeType = Meteor.settings.public.avatarStore.type
 
-store = new FS.Store.FileSystem "avatars",
-	path: uploadPath
-	fileKeyMaker: (fileObj) ->
-		filename = fileObj.name()
-		filenameInStore = fileObj.name({store: 'avatars'})
+store = undefined
 
-		return filenameInStore || filename
+beforeWrite = (fileObj) ->
+	fileObj._setInfo 'avatars', 'storeType', storeType, true
+
+if storeType is 'FileSystem'
+	path = "~/uploads"
+	if Meteor.settings?.public?.avatarStore?.path?
+		path = Meteor.settings.public.avatarStore.path
+	console.log path
+
+	store = new FS.Store.FileSystem "avatars",
+		path: path
+		beforeWrite: beforeWrite
+		fileKeyMaker: (fileObj) ->
+			filename = fileObj.name()
+			filenameInStore = fileObj.name({store: 'avatars'})
+
+			return filenameInStore || filename
+else
+	store = new FS.Store.GridFS "avatars",
+		beforeWrite: beforeWrite
 
 @Avatars = new FS.Collection "avatars",
 	stores: [store]
@@ -29,7 +46,7 @@ Meteor.startup ->
 
 			collection = FS._collections['avatars']
 
-			file = if collection? then collection.findOne({ "copies.avatars.key": opts.filename }) else null
+			file = if collection? then collection.findOne({ "copies.avatars.name": opts.filename, "copies.avatars.storeType": storeType }) else null
 
 			return {
 				collection: collection