public async Task SaveTokens(Microsoft.SharePoint.Client.ChangeToken lastChangeToken, Notification notification)
{
LastChangeToken = lastChangeToken;
if (CurrentToken != null)
{
if (!CurrentToken.LastChangeToken.Equals(LastChangeToken.StringValue, StringComparison.InvariantCultureIgnoreCase))
{
_logger.LogInformation($"Save latest change token to DB: {LastChangeToken.StringValue}");
CurrentToken.LastChangeToken = LastChangeToken.StringValue;
}
}
else
{
_logger.LogInformation($"Save new change token to DB: {LastChangeToken.StringValue} for subscription {notification.SubscriptionId}");
_dbContext.ChangeTokens.Add(new ChangeToken
{
Id = Guid.Parse(notification.SubscriptionId),
ListId = notification.Resource,
WebId = notification.WebId,
LastChangeToken = LastChangeToken.StringValue
});
}
await _dbContext.SaveChangesAsync();
}
public void Process(Notification notification)
{
CurrentToken = _dbContext.GetLatestBySubscriptionId(notification.SubscriptionId);
if (CurrentToken != null)
{
_logger.LogInformation($"Get previous change token: {CurrentToken.LastChangeToken}");
LastChangeToken = new Microsoft.SharePoint.Client.ChangeToken
{
StringValue = CurrentToken.LastChangeToken
};
}
}
