private async Task MigrateConversation(
Conversation conversation, CancellationToken cancellationToken)
{
Logger.Debug("Getting messages ...");
using (AsyncEnumerator <Message> messageEnumerator =
await input.GetMessages(conversation.Id, filter))
{
while (await messageEnumerator.Move())
{
// Read message.
Message message = await messageEnumerator.Read();
Logger.Trace("Read message: {0}", message);
if (message.MessageType == Enums.InternalMessageType.Unknown)
{
Logger.Warn("Skip message.");
continue;
}
// Get message group and open new group if necessary.
Group group = await grouper.GetGroup(input, conversation, message);
Logger.Trace("Group: {0}", group);
if (!group.Equals(output.CurrentGroup))
{
output.EndGroup();
output.BeginGroup(group);
}
// Insert message.
await output.InsertMessage(message);
// Check cancellation token.
cancellationToken.ThrowIfCancellationRequested();
}
}
}
public async Task Migrate(CancellationToken cancellationToken)
{
Logger.Debug("Starting migration ...");
using (AsyncEnumerator <Conversation> conversationEnumerator =
await input.GetConversationsAsync())
{
while (await conversationEnumerator.Move())
{
Conversation conversation = await conversationEnumerator.Read();
Logger.Debug("Read conversation: {0}", conversation);
await MigrateConversation(conversation, cancellationToken);
cancellationToken.ThrowIfCancellationRequested();
}
}
Logger.Debug("Finished.");
}