Add fee calculation back in V5 #322

lib/data/models/company_gateway_model.dart

@@ -362,6 +362,36 @@ abstract class FeesAndLimitsSettings
   @BuiltValueField(wireName: 'is_enabled')
   bool get isEnabled;
 
+  double calculateSampleFee(double amount) {
+    double fee = 0;
+
+    fee += feeAmount;
+
+    if (feePercent != 0) {
+      if (adjustFeePercent) {
+        fee += round((amount / (1 - feePercent / 100)) - amount, 2);
+      } else {
+        fee += round(amount * feePercent / 100, 2);
+      }
+    }
+
+    if (taxRate1 != 0) {
+      fee += round(amount * 1 / taxRate1, 2);
+    }
+    if (taxRate2 != 0) {
+      fee += round(amount * 1 / taxRate2, 2);
+    }
+    if (taxRate2 != 0) {
+      fee += round(amount * 1 / taxRate2, 2);
+    }
+
+    if (feeCap > 0 && fee > feeCap) {
+      fee = feeCap;
+    }
+
+    return fee;
+  }
+
   // ignore: unused_element
   static void _initializeBuilder(FeesAndLimitsSettingsBuilder builder) =>
       builder..isEnabled = false;

lib/ui/app/forms/learn_more.dart

@@ -27,7 +27,6 @@ class LearnMoreUrl extends StatelessWidget {
     }
 
     return Row(
-      crossAxisAlignment: CrossAxisAlignment.end,
       children: <Widget>[
         Expanded(
           child: child,
@@ -37,11 +36,7 @@ class LearnMoreUrl extends StatelessWidget {
         ),
         TextButton(
           child: Text(label ?? localization.learnMore),
-          onPressed: () async {
-            if (await canLaunch(url)) {
-              await launch(url, forceSafariVC: false, forceWebView: false);
-            }
-          },
+          onPressed: () => launch(url),
         ),
       ],
     );

lib/ui/company_gateway/edit/company_gateway_edit.dart

@@ -902,6 +902,21 @@ class _FeesEditorState extends State<FeesEditor> {
     }
   }
 
+  String _sampleFee() {
+    final localization = AppLocalization.of(context);
+    final viewModel = widget.viewModel;
+    final companyGateway = viewModel.companyGateway;
+    final settings =
+        companyGateway.getSettingsForGatewayTypeId(widget.gatewayTypeId);
+
+    const double amount = 100;
+    final fee = settings.calculateSampleFee(100);
+
+    return localization.feesSample
+        .replaceFirst(':amount', formatNumber(amount, context))
+        .replaceFirst(':total', formatNumber(fee, context));
+  }
+
   @override
   Widget build(BuildContext context) {
     final localization = AppLocalization.of(context);
@@ -912,6 +927,7 @@ class _FeesEditorState extends State<FeesEditor> {
         companyGateway.getSettingsForGatewayTypeId(widget.gatewayTypeId);
 
     return FormCard(
+      crossAxisAlignment: CrossAxisAlignment.start,
       children: <Widget>[
         DecoratedFormField(
           label: localization.feePercent,
@@ -927,13 +943,6 @@ class _FeesEditorState extends State<FeesEditor> {
           keyboardType:
               TextInputType.numberWithOptions(decimal: true, signed: true),
         ),
-        DecoratedFormField(
-          label: localization.feeCap,
-          controller: _capController,
-          isMoney: true,
-          keyboardType:
-              TextInputType.numberWithOptions(decimal: true, signed: true),
-        ),
         if (company.enableFirstItemTaxRate)
           TaxRateDropdown(
             onSelected: (taxRate) => viewModel.onChanged(companyGateway.rebuild(
@@ -970,6 +979,13 @@ class _FeesEditorState extends State<FeesEditor> {
             initialTaxName: settings.taxName3,
             initialTaxRate: settings.taxRate3,
           ),
+        DecoratedFormField(
+          label: localization.feeCap,
+          controller: _capController,
+          isMoney: true,
+          keyboardType:
+              TextInputType.numberWithOptions(decimal: true, signed: true),
+        ),
         SizedBox(height: 16),
         LearnMoreUrl(
           url: kGatewayFeeHelpURL,
@@ -984,6 +1000,11 @@ class _FeesEditorState extends State<FeesEditor> {
             subtitle: Text(localization.adjustFeePercentHelp),
           ),
         ),
+        SizedBox(height: 16),
+        Text(
+          _sampleFee(),
+          style: TextStyle(color: Colors.grey),
+        )
       ],
     );
   }

lib/utils/i18n.dart

@@ -16,6 +16,7 @@ mixin LocalizationsProvider on LocaleCodeAware {
   static final Map<String, Map<String, String>> _localizedValues = {
     'en': {
       // STARTER: lang key - do not remove comment
+      'fees_sample': 'The fee for a :amount invoice would be :total.',
       'enable_touch_events': 'Enable Touch Events',
       'enable_touch_events_help': 'Support drag events to scroll',
       'after_saving': 'After Saving',
@@ -74210,6 +74211,10 @@ mixin LocalizationsProvider on LocaleCodeAware {
       _localizedValues[localeCode]['enable_touch_events_help'] ??
       _localizedValues['en']['enable_touch_events_help'];
 
+  String get feesSample =>
+      _localizedValues[localeCode]['fees_sample'] ??
+      _localizedValues['en']['fees_sample'];
+
   // STARTER: lang field - do not remove comment
 
   String lookup(String key) {