Add 'Insert below' option to invoice item line actions

lib/redux/invoice/invoice_actions.dart

@@ -172,9 +172,13 @@ class RemoveInvoiceContact implements PersistUI {
 }
 
 class AddInvoiceItem implements PersistUI {
-  AddInvoiceItem({this.invoiceItem});
+  AddInvoiceItem({
+    this.invoiceItem,
+    this.index,
+  });
 
   final InvoiceItemEntity? invoiceItem;
+  final int? index;
 }
 
 class MoveInvoiceItem implements PersistUI {

lib/redux/invoice/invoice_reducer.dart

@@ -165,7 +165,11 @@ InvoiceEntity _updateEditing(InvoiceEntity? invoice, dynamic action) {
 
 InvoiceEntity _addInvoiceItem(InvoiceEntity? invoice, AddInvoiceItem action) {
   final item = action.invoiceItem ?? InvoiceItemEntity();
-  return invoice!.rebuild((b) => b..lineItems.add(item));
+  if (action.index == null) {
+    return invoice!.rebuild((b) => b..lineItems.add(item));
+  } else {
+    return invoice!.rebuild((b) => b..lineItems.insert(action.index!, item));
+  }
 }
 
 InvoiceEntity _addInvoiceItems(InvoiceEntity? invoice, AddInvoiceItems action) {

lib/ui/invoice/edit/invoice_edit_items_desktop.dart

@@ -1192,6 +1192,7 @@ class _InvoiceEditItemsDesktopState extends State<InvoiceEditItemsDesktop> {
                         final sectionIndex =
                             includedLineItems.indexOf(lineItems[index]);
                         final options = {
+                          localization.insertBelow: MdiIcons.plus,
                           if (widget.isTasks &&
                               (lineItems[index].taskId ?? '').isNotEmpty)
                             localization.viewTask: MdiIcons.chevronDoubleRight,
@@ -1232,6 +1233,8 @@ class _InvoiceEditItemsDesktopState extends State<InvoiceEditItemsDesktop> {
                               index, lineItems.length - 2);
                         } else if (action == localization.remove) {
                           viewModel.onRemoveInvoiceItemPressed!(index);
+                        } else if (action == localization.insertBelow) {
+                          viewModel.addLineItem!(index + 1);
                         }
                         _updateTable();
                       },

lib/ui/invoice/edit/invoice_edit_items_vm.dart

@@ -79,7 +79,7 @@ class InvoiceEditItemsVM extends EntityEditItemsVM {
     CompanyEntity? company,
     InvoiceEntity? invoice,
     int? invoiceItemIndex,
-    Function? addLineItem,
+    Function([int])? addLineItem,
     Function(int)? deleteLineItem,
     Function(int)? onRemoveInvoiceItemPressed,
     Function? clearSelectedInvoiceItem,
@@ -107,8 +107,13 @@ class InvoiceEditItemsVM extends EntityEditItemsVM {
       company: store.state.company,
       invoice: store.state.invoiceUIState.editing,
       invoiceItemIndex: store.state.invoiceUIState.editingItemIndex,
-      addLineItem: () {
-        store.dispatch(AddInvoiceItem(invoiceItem: InvoiceItemEntity()));
+      addLineItem: ([int? index]) {
+        store.dispatch(AddInvoiceItem(
+            index: index,
+            invoiceItem: InvoiceItemEntity().rebuild((b) => b
+              ..typeId = isTasks
+                  ? InvoiceItemEntity.TYPE_TASK
+                  : InvoiceItemEntity.TYPE_STANDARD)));
       },
       deleteLineItem: null,
       onRemoveInvoiceItemPressed: (index) {

lib/utils/i18n.dart

@@ -18,6 +18,7 @@ mixin LocalizationsProvider on LocaleCodeAware {
   static final Map<String, Map<String, String>> _localizedValues = {
     'en': {
       // STARTER: lang key - do not remove comment
+      'insert_below': 'Insert Below',
       'aged_receivable_detailed_report': 'Aged Receivable Detailed Report',
       'aged_receivable_summary_report': 'Aged Receivable Summary Report',
       'client_balance_report': 'Client Balance Report',
@@ -110947,6 +110948,10 @@ mixin LocalizationsProvider on LocaleCodeAware {
       _localizedValues[localeCode]!['run_template'] ??
       _localizedValues['en']!['run_template']!;
 
+  String get insertBelow =>
+      _localizedValues[localeCode]!['insert_below'] ??
+      _localizedValues['en']!['insert_below']!;
+
   // STARTER: lang field - do not remove comment
 
   String lookup(String? key) {