public async Task <MessageDataEntity> AddAsync(MessageDataEntity messageData)
{
await Task.Run(()
=> File.AppendAllText(
_filename,
messageData.ToString() + '\n',
_encoding));
return(messageData);
}
public static MessageDataEntity ParseOrDefault(string line)
{
MessageDataEntity res = null;
try
{
res = Parse(line);
}
catch (Exception ex)
{
res = null;
}
return(res);
}
public async Task <IList <MessageDataEntity> > GetAsync(int limit, CancellationToken token = default)
{
if (limit < 0)
{
throw new ArgumentNullException(nameof(limit));
}
var lines = await FileHelper.GetStringMessagesAsync(_filename, _encoding, 0, token);
Console.WriteLine("readed: {0}", lines.Length);
return(lines
.Skip(lines.Length <= limit || limit == 0 ? 0 : lines.Length - limit)
.Select(l => MessageDataEntity.ParseOrDefault(l))
.Where(m => m != null && m.Text != "Logon" && m.Text != "Logout")
.ToArray());
}