compareTo method

@override int compareTo(SmsMessage other)

Compares this object to another object.

Returns a value like a Comparator when comparing this to other. That is, it returns a negative integer if this is ordered before other, a positive integer if this is ordered after other, and zero if this and other are ordered together.

The other argument must be a value that is comparable to this object.

Implementation

@override
int compareTo(SmsMessage other) {
  // if either one of the id is null, compare by date instead
  if (this.id == null || other.id == null) {
    return this.date!.compareTo(other.date!);
  }

  return ((this.id ?? 0) - (other.id ?? 0));
}