From 30b2a3e0d3cd7d4c10bfe299b7038932dc26b7ea Mon Sep 17 00:00:00 2001
From: Ivan Ray Altomera <irayspacii@gmail.com>
Date: Wed, 1 Apr 2020 16:42:13 +0800
Subject: [PATCH 1/3] feat: printer usb manager

---
 lib/src/printer_usb_manager.dart | 51 ++++++++++++++++++++++++++++++++
 pubspec.yaml                     |  2 ++
 2 files changed, 53 insertions(+)
 create mode 100644 lib/src/printer_usb_manager.dart

diff --git a/lib/src/printer_usb_manager.dart b/lib/src/printer_usb_manager.dart
new file mode 100644
index 0000000..4ace837
--- /dev/null
+++ b/lib/src/printer_usb_manager.dart
@@ -0,0 +1,51 @@
+import 'dart:async';
+import 'dart:io';
+import 'package:esc_pos_utils/esc_pos_utils.dart';
+import 'package:escposprinter/escposprinter.dart';
+
+import './enums.dart';
+
+class PrinterUsbManager {
+
+  Future<List> getDevices() async {
+    List devices = await Escposprinter.getUSBDeviceList;
+    return devices;
+  }
+
+  Future<void> connectDevice(int vendor, int product) async {
+    await Escposprinter.connectPrinter(vendor, product);
+    return;
+  }
+
+  Future<PosPrintResult> writeBytes(
+      List<int> bytes, {
+        int chunkSizeBytes = 20,
+        int queueSleepTimeMs = 20,
+      }) async {
+    final Completer<PosPrintResult> completer = Completer();
+
+    final len = bytes.length;
+    List<List<int>> chunks = [];
+
+    for (var i = 0; i < len; i += chunkSizeBytes) {
+      var end = (i + chunkSizeBytes < len) ? i + chunkSizeBytes : len;
+      chunks.add(bytes.sublist(i, end));
+    }
+
+    for (var i = 0; i < chunks.length; i += 1) {
+      await Escposprinter.printBytes(bytes);
+      sleep(Duration(milliseconds: queueSleepTimeMs));
+    }
+
+    completer.complete(PosPrintResult.success);
+
+    return completer.future;
+  }
+
+  Future<PosPrintResult> printTicket(Ticket ticket) {
+    if (ticket == null || ticket.bytes.isEmpty) {
+      return Future<PosPrintResult>.value(PosPrintResult.ticketEmpty);
+    }
+    return writeBytes(ticket.bytes);
+  }
+}
\ No newline at end of file
diff --git a/pubspec.yaml b/pubspec.yaml
index 00c39ab..5ceb869 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -10,6 +10,8 @@ dependencies:
   flutter:
     sdk: flutter
   esc_pos_utils: ^0.3.5
+  escposprinter:
+    git: https://github.com/bailabs/esc-pos-printer-flutter
   # esc_pos_utils:
     # path: ../esc_pos_utils
 

From 6d4d57ce368fb62e8785976dc8e8e227bfa61c7b Mon Sep 17 00:00:00 2001
From: Ivan Ray Altomera <iRaySpace@users.noreply.github.com>
Date: Wed, 1 Apr 2020 18:20:40 +0800
Subject: [PATCH 2/3] hotfix: add printer usb manager

---
 lib/esc_pos_printer.dart | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/esc_pos_printer.dart b/lib/esc_pos_printer.dart
index da58b11..2514771 100644
--- a/lib/esc_pos_printer.dart
+++ b/lib/esc_pos_printer.dart
@@ -9,3 +9,4 @@ library esc_pos_printer;
 
 export './src/enums.dart';
 export './src/printer_network_manager.dart';
+export './src/printer_usb_manager.dart';

From 656296e2f2b2e6535ee1c37a333745faacaaea97 Mon Sep 17 00:00:00 2001
From: Ivan Ray Altomera <irayspacii@gmail.com>
Date: Thu, 2 Apr 2020 11:37:38 +0800
Subject: [PATCH 3/3] fix: write bytes

---
 lib/src/printer_usb_manager.dart | 22 ++--------------------
 1 file changed, 2 insertions(+), 20 deletions(-)

diff --git a/lib/src/printer_usb_manager.dart b/lib/src/printer_usb_manager.dart
index 4ace837..9da6330 100644
--- a/lib/src/printer_usb_manager.dart
+++ b/lib/src/printer_usb_manager.dart
@@ -17,28 +17,10 @@ class PrinterUsbManager {
     return;
   }
 
-  Future<PosPrintResult> writeBytes(
-      List<int> bytes, {
-        int chunkSizeBytes = 20,
-        int queueSleepTimeMs = 20,
-      }) async {
+  Future<PosPrintResult> writeBytes(List<int> bytes) async {
     final Completer<PosPrintResult> completer = Completer();
-
-    final len = bytes.length;
-    List<List<int>> chunks = [];
-
-    for (var i = 0; i < len; i += chunkSizeBytes) {
-      var end = (i + chunkSizeBytes < len) ? i + chunkSizeBytes : len;
-      chunks.add(bytes.sublist(i, end));
-    }
-
-    for (var i = 0; i < chunks.length; i += 1) {
-      await Escposprinter.printBytes(bytes);
-      sleep(Duration(milliseconds: queueSleepTimeMs));
-    }
-
+    await Escposprinter.printBytes(bytes);
     completer.complete(PosPrintResult.success);
-
     return completer.future;
   }