null safety

lib/pages/processing/processing_editor.dart

@@ -11,14 +11,14 @@ import 'package:fcs/pages/widgets/local_text.dart';
 import 'package:fcs/pages/widgets/progress.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter_icons/flutter_icons.dart';
+import 'package:flutter_vector_icons/flutter_vector_icons.dart';
 import 'package:provider/provider.dart';
 
 import 'model/processing_model.dart';
 import 'package_editor.dart';
 
 class ProcesingEditor extends StatefulWidget {
-  final Processing processing;
+  final Processing? processing;
   const ProcesingEditor({this.processing});
   @override
   _ProcesingEditorState createState() => _ProcesingEditorState();
@@ -27,9 +27,9 @@ class ProcesingEditor extends StatefulWidget {
 class _ProcesingEditorState extends State<ProcesingEditor> {
   Processing processing = Processing();
   bool _isLoading = false;
-  bool _isNew;
-  User consignee;
-  User sender;
+  late bool _isNew;
+  User? consignee;
+  User? sender;
   List<Package> packages = [];
 
   @override
@@ -37,7 +37,7 @@ class _ProcesingEditorState extends State<ProcesingEditor> {
     super.initState();
     _isNew = widget.processing == null;
     if (!_isNew) {
-      processing = widget.processing;
+      processing = widget.processing!;
       consignee = User(
           fcsID: processing.userID,
           name: processing.userName,
@@ -56,7 +56,7 @@ class _ProcesingEditorState extends State<ProcesingEditor> {
       children: <Widget>[
         Expanded(
             child: DisplayText(
-          text: consignee != null ? consignee.fcsID : "",
+          text: consignee != null ? consignee!.fcsID : "",
           labelTextKey: "processing.fcs.id",
           icon: FcsIDIcon(),
         )),
@@ -71,14 +71,14 @@ class _ProcesingEditorState extends State<ProcesingEditor> {
     );
 
     final phoneNumberBox = DisplayText(
-      text: consignee != null ? consignee.phoneNumber : "",
+      text: consignee != null ? consignee!.phoneNumber : "",
       labelTextKey: "processing.phone",
       maxLines: 2,
       iconData: Icons.phone,
     );
 
     final namebox = DisplayText(
-      text: consignee != null ? consignee.name : "",
+      text: consignee != null ? consignee!.name : "",
       labelTextKey: "processing.consignee.name",
       maxLines: 2,
       iconData: Icons.person,
@@ -98,7 +98,7 @@ class _ProcesingEditorState extends State<ProcesingEditor> {
       children: <Widget>[
         Expanded(
             child: DisplayText(
-          text: sender != null ? sender.fcsID : "",
+          text: sender != null ? sender!.fcsID : "",
           labelTextKey: "processing.fcs.id",
           icon: FcsIDIcon(),
         )),
@@ -113,14 +113,14 @@ class _ProcesingEditorState extends State<ProcesingEditor> {
     );
 
     final shipperPhoneNumberBox = DisplayText(
-      text: sender != null ? sender.phoneNumber : "",
+      text: sender != null ? sender!.phoneNumber : "",
       labelTextKey: "processing.phone",
       maxLines: 2,
       iconData: Icons.phone,
     );
 
     final shipperNamebox = DisplayText(
-      text: sender != null ? sender.name : "",
+      text: sender != null ? sender!.name : "",
       labelTextKey: "processing.shipper.name",
       maxLines: 2,
       iconData: Icons.person,
@@ -152,7 +152,7 @@ class _ProcesingEditorState extends State<ProcesingEditor> {
                       context, "Warning", "Please select 'Consignee'");
                   return;
                 }
-                Package _package = await Navigator.push<Package>(
+                Package? _package = await Navigator.push<Package>(
                   context,
                   CupertinoPageRoute(
                       builder: (context) => PackageEditor(
@@ -160,7 +160,7 @@ class _ProcesingEditorState extends State<ProcesingEditor> {
                             consignee: this.consignee,
                           )),
                 );
-                _addPackage(_package);
+                _addPackage(_package!);
                 // _savePackage(_package);
               }),
         ],
@@ -230,10 +230,10 @@ class _ProcesingEditorState extends State<ProcesingEditor> {
     return packages.map((p) {
       return InkWell(
         onTap: () async {
-          Package _package = await Navigator.of(context).push<Package>(
+          Package? _package = await Navigator.of(context).push<Package>(
               CupertinoPageRoute(
                   builder: (context) => PackageInfo(package: p)));
-          _savePackage(_package);
+          _savePackage(_package!);
         },
         child: DisplayText(
           labelTextKey: "processing.tracking.id",
@@ -273,7 +273,7 @@ class _ProcesingEditorState extends State<ProcesingEditor> {
       if (_isNew) {
         await processingModel.createProcessing(processing);
       } else {
-        processing.id = widget.processing.id;
+        processing.id = widget.processing!.id;
         await processingModel.updateProcessing(processing);
       }
       Navigator.pop(context);