refactored handle delete function

Author: NyashaMuusha

JeMPI_Apps/JeMPI_UI/src/pages/settings/deterministic/DeterministicContent.tsx

@@ -227,45 +227,38 @@ const DeterministicContent = ({
   }
 
   const handleDeleteRow = (index: number) => {
-    const newComparators = [...comparators]
-    const newFields = [...fields]
-    const newOperators = [...operators]
-    newComparators.splice(index, 1)
-    newFields.splice(index, 1)
-
+    const updateArray = (arr: any[], idx: number) => {
+      const newArr = [...arr];
+      newArr.splice(idx, 1);
+      return newArr;
+    };
+  
+    setComparators(updateArray(comparators, index));
+    setFields(updateArray(fields, index));
     if (index > 0) {
-      newOperators.splice(index - 1, 1)
+      setOperators(updateArray(operators, index - 1));
     }
-
-    setComparators(newComparators)
-    setFields(newFields)
-    setOperators(newOperators)
-
-    const updatedConfiguration = { ...configuration }
+  
+    const updatedConfiguration = { ...configuration };
     const ruleType =
       currentTab === 'link'
         ? 'link'
         : currentTab === 'validate'
         ? 'validate'
-        : 'matchNotification'
-
-    if (newFields.length === 0) {
-      const newRules = [...rules]
-      newRules.splice(index, 1)
-      setRules(newRules)
-
-      if (updatedConfiguration.rules && updatedConfiguration.rules[ruleType]) {
-        updatedConfiguration.rules[ruleType].deterministic.splice(index, 1)
+        : 'matchNotification';
+  
+    if (fields.length === 0) {
+      const newRules = updateArray(rules, index);
+      setRules(newRules);
+  
+      if (updatedConfiguration.rules?.[ruleType]) {
+        updatedConfiguration.rules[ruleType].deterministic.splice(index, 1);
       }
-
-      setConfiguration(updatedConfiguration as Configuration)
-      localStorage.setItem(
-        'configuration',
-        JSON.stringify(updatedConfiguration)
-      )
+  
+      setConfiguration(updatedConfiguration as Configuration);
+      localStorage.setItem('configuration', JSON.stringify(updatedConfiguration));
     }
-  }
-
+  };
   return (
     <Box>
       <Box