validateTableData.ts

import {
  normalizeString,
} from './utils';

export const validateTableData = (rows: ReadonlyArray<readonly unknown[]>): void => {
  if (!Array.isArray(rows)) {
    throw new TypeError('Table data must be an array.');
  }

  if (rows.length === 0) {
    throw new Error('Table must define at least one row.');
  }

  if (rows[0].length === 0) {
    throw new Error('Table must define at least one column.');
  }

  const columnNumber = rows[0].length;

  for (const row of rows) {
    if (!Array.isArray(row)) {
      throw new TypeError('Table row data must be an array.');
    }

    if (row.length !== columnNumber) {
      throw new Error('Table must have a consistent number of cells.');
    }

    for (const cell of row) {
      // eslint-disable-next-line no-control-regex
      if (/[\u0001-\u0006\u0008\u0009\u000B-\u001A]/.test(normalizeString(String(cell)))) {
        throw new Error('Table data must not contain control characters.');
      }
    }
  }
};