unwrap tool and testCases then updated index file

src/pages/list/unwrap/service.ts

@@ -0,0 +1,69 @@
+export type SplitOperatorType = 'symbol' | 'regex';
+
+function leftUnwrap(
+    row: string,
+    left: string = '',
+    multiLevel: boolean
+): string {
+    if (left === '') return row; // Prevent infinite loop if left is an empty string
+    while (row.startsWith(left)) {
+        row = row.slice(left.length);
+        if (!multiLevel) {
+            break;
+        }
+    }
+    return row;
+}
+
+function rightUnwrap(
+    row: string,
+    right: string = '',
+    multiLevel: boolean
+): string {
+    if (right === '') return row; // Prevent infinite loop if right is an empty string
+    while (row.endsWith(right)) {
+        row = row.slice(0, row.length - right.length);
+        if (!multiLevel) {
+            break;
+        }
+    }
+    return row;
+}
+
+export function unwrapList(
+    splitOperatorType: SplitOperatorType,
+    input: string,
+    splitSeparator: string,
+    joinSeparator: string,
+    deleteEmptyItems: boolean,
+    multiLevel: boolean,
+    trimItems: boolean,
+    left: string = '',
+    right: string = ''
+): string {
+    let array: string[];
+    let unwrappedArray: string[] = [];
+    switch (splitOperatorType) {
+        case 'symbol':
+            array = input.split(splitSeparator);
+            break;
+        case 'regex':
+            array = input.split(new RegExp(splitSeparator));
+            break;
+    }
+    if (deleteEmptyItems) {
+        array = array.filter(Boolean);
+    }
+
+    // for each element of array unwrap left side then right side and push the result to a final array
+    for (let row of array) {
+        row = leftUnwrap(row, left, multiLevel);
+        row = rightUnwrap(row, right, multiLevel);
+        unwrappedArray.push(row);
+    }
+    // trim items if needed
+    if (trimItems) {
+        unwrappedArray = unwrappedArray.map(item => item.trim());
+    }
+    return unwrappedArray.join(joinSeparator);
+}