Function requireNumberInt

frontend/lib/src/WidgetStateManager.ts:1527–1541

* Coerce a `number | Long` to a `number`. * * Our "intValue" and "intArrayValue" widget protobuf fields represent their * values with sint64, because sint32 is too small to represent the full range * of JavaScript int values. Protobufjs uses `number | Long` to represent * sint64. However, we're

(value: number | Long)

 * precision (which should not be possible!), throw an error instead.
 */
function requireNumberInt(value: number | Long): number {
  if (typeof value === "number") {
    return value
  }

  const longNumber = util.LongBits.from(value).toNumber()
  if (Number.isSafeInteger(longNumber)) {
    return longNumber
  }

  throw new Error(
    // eslint-disable-next-line @typescript-eslint/no-base-to-string -- Long has a toString() method
    `value ${value.toString()} cannot be converted to number without a loss of precision!`
  )
}