feat: add feature flags to enable/disable functionality

packages/flutter_availability/lib/src/config/availability_options.dart

@@ -28,6 +28,11 @@ class AvailabilityOptions {
     this.timePickerBuilder,
     this.loadingIndicatorBuilder = DefaultLoader.builder,
     this.errorDisplayBuilder = DefaultErrorDisplayDialog.defaultErrorDisplay,
+    this.featureSet = const {
+      AvailabilityFeature.breaks,
+      AvailabilityFeature.customAvailability,
+      AvailabilityFeature.templates,
+    },
     AvailabilityDataInterface? dataInterface,
   }) : dataInterface = dataInterface ?? LocalAvailabilityDataInterface();
 
@@ -95,6 +100,11 @@ class AvailabilityOptions {
   /// base widget through [baseScreenBuilder].
   final ErrorDisplayBuilder errorDisplayBuilder;
 
+  /// Enabled features when using these options
+  ///
+  /// Look at [AvailabilityFeature] for more information.
+  final Set<AvailabilityFeature> featureSet;
+
   final _borderRadius = BorderRadius.circular(5);
 
   /// The border radius used on the individual elements
@@ -233,3 +243,21 @@ typedef ErrorDisplayBuilder = Future<void> Function(
   BuildContext context,
   AvailabilityError error,
 );
+
+/// Lists all features that are toggleable
+enum AvailabilityFeature {
+  /// Anything template related
+  templates,
+
+  /// Definition of breaks
+  breaks,
+
+  /// Definition of custom availabilities without templates
+  customAvailability;
+}
+
+/// Extension for validating whether a feature is enabled
+extension FeatureRequirement on Set<AvailabilityFeature> {
+  /// Whether a required feature is enabled
+  bool require(AvailabilityFeature feature) => contains(feature);
+}

packages/flutter_availability/lib/src/ui/screens/availability_modification.dart

@@ -241,6 +241,7 @@ class _AvailabilitiesModificationScreenLayout extends HookWidget {
   Widget build(BuildContext context) {
     var availabilityScope = AvailabilityScope.of(context);
     var options = availabilityScope.options;
+    var featureSet = options.featureSet;
 
     return options.baseScreenBuilder(
       context,
@@ -253,25 +254,31 @@ class _AvailabilitiesModificationScreenLayout extends HookWidget {
             onChanged: onClearSection,
           ),
           if (!viewModel.clearAvailability) ...[
-            const SizedBox(height: 24),
-            AvailabilityTemplateSelection(
-              selectedTemplates: selectedTemplates,
-              onTemplateAdd: onTemplateSelected,
-              onTemplatesRemoved: onTemplatesRemoved,
-            ),
-            const SizedBox(height: 24),
-            AvailabilityTimeSelection(
-              viewModel: viewModel,
-              key: ValueKey(viewModel),
-              onStartChanged: onStartChanged,
-              onEndChanged: onEndChanged,
-            ),
-            const SizedBox(height: 24),
-            PauseSelection(
-              breaks: viewModel.breaks,
-              editingTemplate: false,
-              onBreaksChanged: onBreaksChanged,
-            ),
+            if (featureSet.require(AvailabilityFeature.templates)) ...[
+              const SizedBox(height: 24),
+              AvailabilityTemplateSelection(
+                selectedTemplates: selectedTemplates,
+                onTemplateAdd: onTemplateSelected,
+                onTemplatesRemoved: onTemplatesRemoved,
+              ),
+            ],
+            if (featureSet.require(AvailabilityFeature.customAvailability)) ...[
+              const SizedBox(height: 24),
+              AvailabilityTimeSelection(
+                viewModel: viewModel,
+                key: ValueKey(viewModel),
+                onStartChanged: onStartChanged,
+                onEndChanged: onEndChanged,
+              ),
+              if (featureSet.require(AvailabilityFeature.breaks)) ...[
+                const SizedBox(height: 24),
+                PauseSelection(
+                  breaks: viewModel.breaks,
+                  editingTemplate: false,
+                  onBreaksChanged: onBreaksChanged,
+                ),
+              ],
+            ],
           ],
         ],
         buttons: [saveButton],

packages/flutter_availability/lib/src/ui/widgets/template_legend.dart

@@ -1,4 +1,5 @@
 import "package:flutter/material.dart";
+import "package:flutter_availability/src/config/availability_options.dart";
 import "package:flutter_availability/src/util/scope.dart";
 import "package:flutter_availability_data_interface/flutter_availability_data_interface.dart";
 
@@ -35,6 +36,7 @@ class _TemplateLegendState extends State<TemplateLegend> {
     var options = availabilityScope.options;
     var colors = options.colors;
     var translations = options.translations;
+    var featureSet = options.featureSet;
 
     var templatesLoading =
         widget.availabilities.connectionState == ConnectionState.waiting;
@@ -47,6 +49,11 @@ class _TemplateLegendState extends State<TemplateLegend> {
 
     var templatesVisible = templatesAvailable && _templateDrawerOpen;
 
+    if (!templatesAvailable &&
+        !featureSet.require(AvailabilityFeature.templates)) {
+      return const SizedBox.shrink();
+    }
+
     void onDrawerHeaderClick() {
       if (!templatesAvailable && !_templateDrawerOpen) {
         return;
@@ -115,25 +122,23 @@ class _TemplateLegendState extends State<TemplateLegend> {
                     ),
                   ),
                 ],
-                for (var template in templates) ...[
-                  Padding(
-                    padding: const EdgeInsets.only(
-                      top: 10,
-                      left: 12,
+                if (featureSet.require(AvailabilityFeature.templates)) ...[
+                  for (var template in templates) ...[
+                    Padding(
+                      padding: const EdgeInsets.only(
+                        top: 10,
+                        left: 12,
+                      ),
+                      child: _TemplateLegendItem(
+                        name: template.name,
+                        backgroundColor: Color(template.color),
+                      ),
                     ),
-                    child: _TemplateLegendItem(
-                      name: template.name,
-                      backgroundColor: Color(template.color),
-                    ),
-                  ),
+                  ],
+                  const SizedBox(height: 10),
+                  createNewTemplateButton,
                 ],
-                Padding(
-                  padding: const EdgeInsets.only(
-                    top: 10,
-                    bottom: 8,
-                  ),
-                  child: createNewTemplateButton,
-                ),
+                const SizedBox(height: 8),
               ],
             ),
           ),
@@ -184,12 +189,14 @@ class _TemplateLegendState extends State<TemplateLegend> {
           padding: const EdgeInsets.only(right: 2),
           child: body,
         ),
-        if (!templatesVisible) ...[
-          const SizedBox(height: 12),
-          if (templatesLoading) ...[
-            options.loadingIndicatorBuilder(context),
-          ] else ...[
-            createNewTemplateButton,
+        if (featureSet.require(AvailabilityFeature.templates)) ...[
+          if (!templatesVisible) ...[
+            const SizedBox(height: 12),
+            if (templatesLoading) ...[
+              options.loadingIndicatorBuilder(context),
+            ] else ...[
+              createNewTemplateButton,
+            ],
           ],
         ],
       ],

packages/flutter_availability/lib/src/ui/widgets/template_time_break.dart

@@ -1,7 +1,9 @@
 import "package:flutter/material.dart";
+import "package:flutter_availability/src/config/availability_options.dart";
 import "package:flutter_availability/src/ui/view_models/template_daydata_view_model.dart";
 import "package:flutter_availability/src/ui/widgets/pause_selection.dart";
 import "package:flutter_availability/src/ui/widgets/template_time_selection.dart";
+import "package:flutter_availability/src/util/scope.dart";
 
 /// Section for selecting the time and breaks for a single day
 class TemplateTimeAndBreakSection extends StatelessWidget {
@@ -19,17 +21,20 @@ class TemplateTimeAndBreakSection extends StatelessWidget {
   final void Function(DayTemplateDataViewModel data) onDayDataChanged;
 
   @override
-  Widget build(BuildContext context) => Column(
-        children: [
-          TemplateTimeSelection(
-            key: ValueKey([dayData.startTime, dayData.endTime]),
-            startTime: dayData.startTime,
-            endTime: dayData.endTime,
-            onStartChanged: (start) =>
-                onDayDataChanged(dayData.copyWith(startTime: start)),
-            onEndChanged: (end) =>
-                onDayDataChanged(dayData.copyWith(endTime: end)),
-          ),
+  Widget build(BuildContext context) {
+    var featureSet = AvailabilityScope.of(context).options.featureSet;
+    return Column(
+      children: [
+        TemplateTimeSelection(
+          key: ValueKey([dayData.startTime, dayData.endTime]),
+          startTime: dayData.startTime,
+          endTime: dayData.endTime,
+          onStartChanged: (start) =>
+              onDayDataChanged(dayData.copyWith(startTime: start)),
+          onEndChanged: (end) =>
+              onDayDataChanged(dayData.copyWith(endTime: end)),
+        ),
+        if (featureSet.require(AvailabilityFeature.breaks)) ...[
           const SizedBox(height: 24),
           PauseSelection(
             editingTemplate: true,
@@ -38,5 +43,7 @@ class TemplateTimeAndBreakSection extends StatelessWidget {
                 onDayDataChanged(dayData.copyWith(breaks: pauses)),
           ),
         ],
-      );
+      ],
+    );
+  }
 }