public override bool Equals(DatItem other)
{
bool dupefound = false;
// If we don't have a rom, return false
if (ItemType != other.ItemType)
{
return(dupefound);
}
// Otherwise, treat it as a Rom
Rom newOther = other as Rom;
// If all hashes are empty but they're both nodump and the names match, then they're dupes
if ((ItemStatus == ItemStatus.Nodump && newOther.ItemStatus == ItemStatus.Nodump) &&
Name == newOther.Name &&
!HasHashes() && !newOther.HasHashes())
{
dupefound = true;
}
// If we have a file that has no known size, rely on the hashes only
else if (Size == null && HashMatch(newOther))
{
dupefound = true;
}
// Otherwise if we get a partial match
else if (Size == newOther.Size && HashMatch(newOther))
{
dupefound = true;
}
return(dupefound);
}
/// <summary>
/// Returns if any hashes are common with another Rom
/// </summary>
/// <param name="other">Rom to compare against</param>
/// <returns>True if any hashes are in common, false otherwise</returns>
private bool HashMatch(Rom other)
{
// If either have no hashes, we return false, otherwise this would be a false positive
if (!HasHashes() || !other.HasHashes())
{
return(false);
}
// If neither have hashes in common, we return false, otherwise this would be a false positive
if (!HasCommonHash(other))
{
return(false);
}
// Return if all hashes match according to merge rules
return(ConditionalHashEquals(_crc, other._crc) &&
ConditionalHashEquals(_md5, other._md5) &&
ConditionalHashEquals(_sha1, other._sha1) &&
ConditionalHashEquals(_sha256, other._sha256) &&
ConditionalHashEquals(_sha384, other._sha384) &&
ConditionalHashEquals(_sha512, other._sha512) &&
ConditionalHashEquals(_spamsum, other._spamsum));
}
