Recurring invoices

lib/data/models/invoice_model.dart

@@ -169,7 +169,8 @@ abstract class InvoiceEntity extends Object
       lastSentDate: '',
       nextSendDate: '',
       frequencyId: kFrequencyMonthly,
-      remainingCycles: 0,
+      remainingCycles: -1,
+      dueDateDays: '',
     );
   }
 

lib/ui/invoice/edit/invoice_edit_desktop.dart

@@ -270,6 +270,29 @@ class InvoiceEditDesktopState extends State<InvoiceEditDesktop>
                             .toList()
                       ],
                     ),
+                    AppDropdownButton<String>(
+                      labelText: localization.dueDate,
+                      value: invoice.dueDateDays ?? '',
+                      onChanged: (dynamic value) => viewModel.onChanged(
+                          invoice.rebuild((b) => b..dueDateDays = value)),
+                      items: [
+                        DropdownMenuItem(
+                          child: Text(localization.usePaymentTerms),
+                          value: 'terms',
+                        ),
+                        ...List<int>.generate(31, (i) => i + 1)
+                            .map((value) => DropdownMenuItem(
+                                  child: Text(value == 1
+                                      ? localization.firstDayOfTheMonth
+                                      : value == 31
+                                          ? localization.lastDayOfTheMonth
+                                          : localization.dayCount.replaceFirst(
+                                              ':count', '$value')),
+                                  value: '$value',
+                                ))
+                            .toList()
+                      ],
+                    ),
                   ] else ...[
                     DatePicker(
                       validator: (String val) => val.trim().isEmpty

lib/utils/i18n.dart

@@ -15,6 +15,10 @@ mixin LocalizationsProvider on LocaleCodeAware {
   static final Map<String, Map<String, String>> _localizedValues = {
     'en': {
       // STARTER: lang key - do not remove comment
+      'day_count': 'Day :count',
+      'first_day_of_the_month': 'First Day of the Month',
+      'last_day_of_the_month': 'Last Day of the Month',
+      'use_payment_terms': 'Use Payment Terms',
       'endless': 'Endless',
       'next_send_date': 'Next Send Date',
       'remaining_cycles': 'Remaining Cycles',
@@ -4545,6 +4549,17 @@ mixin LocalizationsProvider on LocaleCodeAware {
 
   String get endless => _localizedValues[localeCode]['endless'] ?? '';
 
+  String get usePaymentTerms =>
+      _localizedValues[localeCode]['use_payment_terms'] ?? '';
+
+  String get firstDayOfTheMonth =>
+      _localizedValues[localeCode]['first_day_of_the_month'] ?? '';
+
+  String get lastDayOfTheMonth =>
+      _localizedValues[localeCode]['last_day_of_the_month'] ?? '';
+
+  String get dayCount => _localizedValues[localeCode]['day_count'] ?? '';
+
   String lookup(String key) {
     final lookupKey = toSnakeCase(key);