Function parseFileRows

apps/sim/lib/table/import.ts:495–509

(
  buffer: Buffer,
  fileName: string,
  contentType?: string
)

 * the MIME content type. Throws on unsupported formats so callers fail fast.
 */
export async function parseFileRows(
  buffer: Buffer,
  fileName: string,
  contentType?: string
): Promise<{ headers: string[]; rows: Record<string, unknown>[] }> {
  const ext = fileName.split('.').pop()?.toLowerCase()
  if (ext === 'json' || contentType === 'application/json') {
    return parseJsonRows(buffer)
  }
  if (ext === 'csv' || ext === 'tsv' || contentType === 'text/csv') {
    const delimiter = ext === 'tsv' ? '\t' : ','
    return parseCsvBuffer(buffer, delimiter)
  }
  throw new Error(`Unsupported file format: "${ext ?? fileName}". Supported: csv, tsv, json`)
}