refactor: tools folder inside pages

src/pages/tools/string/palindrome/index.tsx

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+import { Box } from '@mui/material';
+import React from 'react';
+import * as Yup from 'yup';
+
+const initialValues = {};
+const validationSchema = Yup.object({
+  // splitSeparator: Yup.string().required('The separator is required')
+});
+export default function Palindrome() {
+  return <Box>Lorem ipsum</Box>;
+}

src/pages/tools/string/palindrome/meta.ts

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+import { defineTool } from '@tools/defineTool';
+import { lazy } from 'react';
+// import image from '@assets/text.png';
+
+export const tool = defineTool('string', {
+  name: 'Palindrome',
+  path: 'palindrome',
+  // image,
+  description: '',
+  shortDescription: '',
+  keywords: ['palindrome'],
+  component: lazy(() => import('./index'))
+});

src/pages/tools/string/palindrome/palindrome.service.test.ts

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+import { describe, expect } from 'vitest';
+import { palindromeList } from './service';
+
+describe('palindromeList', () => {
+  test('should return true for single character words', () => {
+    const input = 'a|b|c';
+    const separator = '|';
+    const result = palindromeList('symbol', input, separator);
+    expect(result).toBe('true|true|true');
+  });
+
+  test('should return false for non-palindromes', () => {
+    const input = 'hello|world';
+    const separator = '|';
+    const result = palindromeList('symbol', input, separator);
+    expect(result).toBe('false|false');
+  });
+
+  test('should split using regex', () => {
+    const input = 'racecar,abba,hello';
+    const separator = ',';
+    const result = palindromeList('regex', input, separator);
+    expect(result).toBe('true,true,false');
+  });
+
+  test('should return empty string for empty input', () => {
+    const input = '';
+    const separator = '|';
+    const result = palindromeList('symbol', input, separator);
+    expect(result).toBe('');
+  });
+
+  test('should split using custom separator', () => {
+    const input = 'racecar;abba;hello';
+    const separator = ';';
+    const result = palindromeList('symbol', input, separator);
+    expect(result).toBe('true;true;false');
+  });
+
+  test('should handle leading and trailing spaces', () => {
+    const input = ' racecar | abba | hello ';
+    const separator = '|';
+    const result = palindromeList('symbol', input, separator);
+    expect(result).toBe('true|true|false');
+  });
+
+  test('should handle multilines checking with trimming', () => {
+    const input = ' racecar  \n    abba \n  hello ';
+    const separator = '\n';
+    const result = palindromeList('symbol', input, separator);
+    expect(result).toBe('true\ntrue\nfalse');
+  });
+
+  test('should handle empty strings in input', () => {
+    const input = 'racecar||hello';
+    const separator = '|';
+    const result = palindromeList('symbol', input, separator);
+    expect(result).toBe('true|true|false');
+  });
+});

src/pages/tools/string/palindrome/service.ts

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+export type SplitOperatorType = 'symbol' | 'regex';
+
+function isPalindrome(word: string, left: number, right: number): boolean {
+  if (left >= right) return true;
+  if (word[left] !== word[right]) return false;
+
+  return isPalindrome(word, left + 1, right - 1);
+}
+
+// check each word of the input and add the palindrome status in an array
+function checkPalindromes(array: string[]): boolean[] {
+  const status: boolean[] = [];
+  for (const word of array) {
+    const palindromeStatus = isPalindrome(word, 0, word.length - 1);
+    status.push(palindromeStatus);
+  }
+  return status;
+}
+
+export function palindromeList(
+  splitOperatorType: SplitOperatorType,
+  input: string,
+  separator: string // the splitting separator will be the joining separator for visual satisfaction
+): string {
+  if (!input) return '';
+  let array: string[];
+  switch (splitOperatorType) {
+    case 'symbol':
+      array = input.split(separator);
+      break;
+    case 'regex':
+      array = input.split(new RegExp(separator));
+      break;
+  }
+  // trim all items to focus on the word and not biasing the result due to spaces (leading and trailing)
+  array = array.map((item) => item.trim());
+
+  const statusArray = checkPalindromes(array);
+
+  return statusArray.map((status) => status.toString()).join(separator);
+}