Add flush handler and make Streamer.write await close

Streamer.js

@@ -21,6 +21,12 @@ class Streamer {
         const combined_stream = CombinedStream.create()
         combined_stream.append(buffer.toString('base64'))
         combined_stream.pipe(write_stream)
+
+        return new Promise(res => {
+            write_stream.socket.on('close', () => {
+                res()
+            })
+        })
     }
 
     stream() {

index.js

@@ -17,6 +17,7 @@ const ops = {
     unlink: require('./ops/unlink'),
     rename: require('./ops/rename'),
     write: require('./ops/write'),
+    flush: require('./ops/flush'),
 }
 
 ;(async () => {

ops/flush.js

@@ -0,0 +1,20 @@
+const Fuse = require('fuse-native')
+const Errors = require('../../shared/Errors')
+const Message = require('../../shared/Message')
+const connector = require('../connector')
+
+module.exports = exports = function (path, fd, cb) {
+console.log('[FLUSH]')
+    connector.send(
+        Message.route('fs.flush')
+            .data({ path, descriptor: fd })
+            .expect_response(msg => {
+                if ( msg.error() ) {
+                    return Errors.toCallback(cb, msg.error())
+                }
+
+console.log('[/FLUSH]')
+                return process.nextTick(cb, 0)
+            })
+    )
+}

ops/release.js

@@ -4,6 +4,7 @@ const Message = require('../../shared/Message')
 const connector = require('../connector')
 
 module.exports = exports = function (path, fd, cb) {
+console.log('[RELEASE]')
     connector.send(
         Message.route('fs.release')
             .data({ path, descriptor: fd })
@@ -12,6 +13,7 @@ module.exports = exports = function (path, fd, cb) {
                     return Errors.toCallback(cb, msg.error())
                 }
 
+console.log('[/RELEASE]')
                 return process.nextTick(cb, 0)
             })
     )

ops/write.js

@@ -10,9 +10,9 @@ module.exports = exports = async function (path, fd, buffer, length, position, c
         console.log({socket_uuid, node_uuid})
 
         const streamer = new Streamer(socket_uuid, node_uuid, length, position)
-        streamer.write(buffer)
-
-        return process.nextTick(cb, length)
+        streamer.write(buffer).then(() => {
+            return process.nextTick(cb, length)
+        })
     } catch (e) {
         console.error(e)
     }