feat: swap-csv-columns

src/pages/tools/csv/swap-csv-columns/service.ts

@@ -0,0 +1,81 @@
+import { splitCsv } from '@utils/csv';
+
+function retrieveFromAndTo(
+  headerRow: string[],
+  fromPositionStatus: boolean,
+  toPositionStatus: boolean,
+  fromPosition: string | '',
+  toPosition: string | '',
+  fromHeader: string | '',
+  toHeader: string | ''
+): number[] {
+  const from = fromPositionStatus
+    ? Number(fromPosition)
+    : headerRow.findIndex((header) => header === fromHeader) + 1;
+
+  const to = toPositionStatus
+    ? Number(toPosition)
+    : headerRow.findIndex((header) => header === toHeader) + 1;
+
+  if (from <= 0 || to <= 0)
+    throw new Error('Invalid column positions. Check headers or positions.');
+
+  if (from > headerRow.length || to > headerRow.length)
+    throw new Error(`There are only ${headerRow.length} columns`);
+
+  return [from, to];
+}
+
+function swap(lines: string[][], from: number, to: number): string[][] {
+  if (from <= 0 || to <= 0)
+    throw new Error('Columns position must be greater than zero ');
+
+  return lines.map((row) => {
+    const newRow = [...row]; // Clone the row to avoid mutating the original
+    [newRow[from - 1], newRow[to - 1]] = [newRow[to - 1], newRow[from - 1]]; // Swap values
+    return newRow;
+  });
+}
+
+export function csvColumnsSwap(
+  input: string,
+  fromPositionStatus: boolean,
+  fromPosition: string | '',
+  toPositionStatus: boolean,
+  toPosition: string | '',
+  fromHeader: string | '',
+  toHeader: string | '',
+  emptyValuesFilling: boolean,
+  customFiller: string | '',
+  deleteComment: boolean,
+  commentCharacter: string | '',
+  emptyLines: boolean
+) {
+  if (!input) {
+    return '';
+  }
+  // split csv input and remove comments
+  const rows = splitCsv(input, deleteComment, commentCharacter, emptyLines);
+
+  const columnCount = Math.max(...rows.map((row) => row.length));
+  for (let i = 0; i < rows.length; i++) {
+    for (let j = 0; j < columnCount; j++) {
+      if (!rows[i][j]) {
+        rows[i][j] = emptyValuesFilling ? '' : customFiller;
+      }
+    }
+  }
+
+  const positions = retrieveFromAndTo(
+    rows[0],
+    fromPositionStatus,
+    toPositionStatus,
+    fromPosition,
+    toPosition,
+    fromHeader,
+    toHeader
+  );
+
+  const result = swap(rows, positions[0], positions[1]);
+  return result.join('\n');
+}