refactored helpers into a helper class to release some complexity out of the widget.

lib/pages/routines/widgets/routine_dialogs/ceiling_sensor/cps_dialog_slider_selector.dart

@@ -31,10 +31,13 @@ class CpsDialogSliderSelector extends StatelessWidget {
     return SliderValueSelector(
       currentCondition: selectedFunctionData.condition,
       dialogType: dialogType,
-      sliderRange: _sliderRange,
+      sliderRange: CpsSliderHelpers.sliderRange(selectedFunctionData.functionCode),
-      displayedValue: _displayText,
+      displayedValue: CpsSliderHelpers.displayText(
+        value: selectedFunctionData.value,
+        functionCode: selectedFunctionData.functionCode,
+      ),
       initialValue: selectedFunctionData.value ?? 0,
-      unit: _unit,
+      unit: CpsSliderHelpers.unit(selectedFunctionData.functionCode),
       onConditionChanged: (condition) => context.read<FunctionBloc>().add(
             AddFunction(
               functionData: DeviceFunctionData(
@@ -57,11 +60,50 @@ class CpsDialogSliderSelector extends StatelessWidget {
               ),
             ),
           ),
-      dividendOfRange: _dividendOfRange,
+      dividendOfRange: CpsSliderHelpers.dividendOfRange(
+        selectedFunctionData.functionCode,
+      ),
     );
   }
 
-  (double, double) get _sliderRange => switch (selectedFunctionData.functionCode) {
+  double reverseMappedValue(double value) {
+    final (inputMin, inputMax) =
+        CpsSliderHelpers.sliderRange(selectedFunctionData.functionCode);
+    final (outputMin, outputMax, outputStep) = CpsSliderHelpers.mappedRange(
+      selectedFunctionData.functionCode,
+    );
+
+    final clampedValue = value.clamp(outputMin, outputMax);
+
+    final stepsFromMin = ((clampedValue - outputMin) / outputStep).round();
+
+    final mappedValue = inputMin +
+        (stepsFromMin *
+            CpsSliderHelpers.dividendOfRange(selectedFunctionData.functionCode));
+
+    return mappedValue.clamp(inputMin, inputMax);
+  }
+}
+
+abstract final class CpsSliderHelpers {
+  static (double min, double max, double step) mappedRange(String functionCode) {
+    final (defaultMin, defaultMax) = sliderRange(functionCode);
+    final defaultDivdidend = dividendOfRange(functionCode);
+    return switch (functionCode) {
+      'static_max_dis' => (0, 500, 50),
+      'presence_reference' => (0, 255, 50),
+      'moving_reference' => (0, 255, 5),
+      'perceptual_boundary' => (0, 500, 50),
+      'moving_boundary' => (0, 500, 50),
+      'moving_rigger_time' => (0, 2000, 100),
+      'moving_static_time' => (0, 6000, 100),
+      'none_body_time' => (0, 300000, 500),
+      _ => (defaultMin, defaultMax, defaultDivdidend),
+    };
+  }
+
+  static (double min, double max) sliderRange(String functionCode) =>
+      switch (functionCode) {
         'moving_speed' => (0, 32),
         'sensitivity' => (0, 10),
         'space_static_val' => (0, 255),
@@ -80,11 +122,40 @@ class CpsDialogSliderSelector extends StatelessWidget {
         _ => (0, 300),
       };
 
-  String get _displayText {
+  static double dividendOfRange(String functionCode) => switch (functionCode) {
-    final value = selectedFunctionData.value;
+        'presence_reference' => 5,
+        'moving_reference' => 5,
+        'moving_max_dis' => 0.5,
+        'static_max_dis' => 0.5,
+        'moving_range' => 0.1,
+        'presence_range' => 0.1,
+        'perceptual_boundary' => 0.5,
+        'moving_boundary' => 0.5,
+        'moving_rigger_time' => 0.1,
+        'moving_static_time' => 1.0,
+        'none_body_time' => 5.0,
+        _ => 1,
+      };
+
+  static String unit(String functionCode) => switch (functionCode) {
+        'moving_max_dis' ||
+        'static_max_dis' ||
+        'moving_range' ||
+        'presence_range' ||
+        'perceptual_boundary' ||
+        'moving_boundary' =>
+          'M',
+        'moving_rigger_time' || 'moving_static_time' || 'none_body_time' => 'sec',
+        _ => '',
+      };
+
+  static String displayText({
+    required dynamic value,
+    required String functionCode,
+  }) {
     final parsedValue = double.tryParse('$value');
 
-    return switch (selectedFunctionData.functionCode) {
+    return switch (functionCode) {
       'moving_max_dis' ||
       'static_max_dis' ||
       'moving_range' ||
@@ -99,38 +170,4 @@ class CpsDialogSliderSelector extends StatelessWidget {
       _ => '${parsedValue?.toStringAsFixed(0) ?? 0}',
     };
   }
-
-  String get _unit {
-    return switch (selectedFunctionData.functionCode) {
-      'moving_max_dis' ||
-      'static_max_dis' ||
-      'moving_range' ||
-      'presence_range' ||
-      'perceptual_boundary' ||
-      'moving_boundary' =>
-        'M',
-      'moving_rigger_time' || 'moving_static_time' || 'none_body_time' => 'sec',
-      _ => '',
-    };
-  }
-
-  double get _dividendOfRange => switch (selectedFunctionData.functionCode) {
-        'sensitivity' => 1,
-        'moving_speed' => 1,
-        'space_static_val' => 1,
-        'space_move_val' => 1,
-        'presence_reference' => 5,
-        'moving_reference' => 5,
-        'moving_max_dis' => 0.5,
-        'static_max_dis' => 0.5,
-        'moving_range' => 0.1,
-        'presence_range' => 0.1,
-        'perceptual_boundary' => 0.5,
-        'moving_boundary' => 0.5,
-        'moving_rigger_time' => 0.1,
-        'moving_static_time' => 1.0,
-        'none_body_time' => 5.0,
-        'sports_para' => 1.0,
-        _ => 1,
-      };
 }