bump 5.0.2

CHANGELOG.md

@@ -1,3 +1,6 @@
+## [5.0.2]
+
+- Add NetworkPrinterManager
 ## [5.0.0]
 
 - Merge esc_pos_utils into this package

lib/escpos.dart

@@ -15,3 +15,4 @@ export './src/pos_column.dart';
 export './src/pos_styles.dart';
 export './src/qrcode.dart';
 export './src/ticket.dart';
+export './src/network_printer.dart';

lib/src/network_printer.dart

@@ -0,0 +1,77 @@
+/*
+ * esc_pos_printer
+ * Created by Andrey Ushakov
+ * 
+ * Copyright (c) 2019-2020. All rights reserved.
+ * See LICENSE for distribution and usage details.
+ */
+
+import 'dart:io';
+import 'ticket.dart';
+
+class PosPrintResult {
+  const PosPrintResult._internal(this.value);
+  final int value;
+  static const success = PosPrintResult._internal(1);
+  static const timeout = PosPrintResult._internal(2);
+  static const printerNotSelected = PosPrintResult._internal(3);
+  static const ticketEmpty = PosPrintResult._internal(4);
+  static const printInProgress = PosPrintResult._internal(5);
+  static const scanInProgress = PosPrintResult._internal(6);
+
+  String get msg {
+    if (value == PosPrintResult.success.value) {
+      return 'Success';
+    } else if (value == PosPrintResult.timeout.value) {
+      return 'Error. Printer connection timeout';
+    } else if (value == PosPrintResult.printerNotSelected.value) {
+      return 'Error. Printer not selected';
+    } else if (value == PosPrintResult.ticketEmpty.value) {
+      return 'Error. Ticket is empty';
+    } else if (value == PosPrintResult.printInProgress.value) {
+      return 'Error. Another print in progress';
+    } else if (value == PosPrintResult.scanInProgress.value) {
+      return 'Error. Printer scanning in progress';
+    } else {
+      return 'Unknown error';
+    }
+  }
+}
+
+/// Printer Network Manager
+class PrinterNetworkManager {
+  String _host = '';
+  int _port = 9100;
+  Duration _timeout = Duration(seconds: 5);
+
+  /// Select a network printer
+  ///
+  /// [timeout] is used to specify the maximum allowed time to wait
+  /// for a connection to be established.
+  void selectPrinter(
+    String host, {
+    int port = 9100,
+    Duration timeout = const Duration(seconds: 5),
+  }) {
+    _host = host;
+    _port = port;
+    _timeout = timeout;
+  }
+
+  Future<PosPrintResult> printTicket(Ticket ticket) {
+    if (_host.isEmpty) {
+      return Future<PosPrintResult>.value(PosPrintResult.printerNotSelected);
+    } else if (ticket.bytes.isEmpty) {
+      return Future<PosPrintResult>.value(PosPrintResult.ticketEmpty);
+    }
+
+    return Socket.connect(_host, _port, timeout: _timeout)
+        .then((Socket socket) {
+      socket.add(ticket.bytes);
+      socket.destroy();
+      return Future<PosPrintResult>.value(PosPrintResult.success);
+    }).catchError((dynamic e) {
+      return Future<PosPrintResult>.value(PosPrintResult.timeout);
+    });
+  }
+}

lib/src/qrcode.dart

@@ -7,7 +7,6 @@
  */
 
 import 'dart:convert';
-
 import 'commands.dart';
 
 class QRSize {

pubspec.yaml

@@ -1,6 +1,6 @@
 name: escpos
 description: Dart library for ESC/POS with networking capability
-version: 5.0.1
+version: 5.0.2
 homepage: https://github.com/CastawayLabs/dart-escpos
 environment:
   sdk: ">=2.12.0 <3.0.0"