/// <summary>
/// Is called when LIST command has completed.
/// </summary>
/// <param name="op">Asynchronous operation.</param>
private void ListCompleted(ListAsyncOP op)
{
try{
// Operation failed.
if(op.Error != null){
m_pException = op.Error;
m_pPop3Client.LogAddException("Exception: " + op.Error.Message,op.Error);
SetState(AsyncOP_State.Completed);
}
// Operation succeeded.
else{
// Fill messages info.
m_pPop3Client.m_pMessages = new POP3_ClientMessageCollection(m_pPop3Client);
foreach(string seqNo_Size in op.ResponseLines){
m_pPop3Client.m_pMessages.Add(Convert.ToInt32(seqNo_Size.Trim().Split(new char[]{' '})[1]));
}
// Try to UID's for messages(If server supports UIDL).
// Start executing LIST command.
POP3_Client.UidlAsyncOP uidlOP = new UidlAsyncOP();
uidlOP.CompletedAsync += delegate(object sender,EventArgs<UidlAsyncOP> e){
UidlCompleted(uidlOP);
};
if(!m_pPop3Client.UidlAsync(uidlOP)){
UidlCompleted(uidlOP);
}
}
}
catch(Exception x){
m_pException = x;
m_pPop3Client.LogAddException("Exception: " + x.Message,x);
SetState(AsyncOP_State.Completed);
}
op.Dispose();
}
/// <summary>
/// Starts sending LIST command to POP3 server.
/// </summary>
/// <param name="op">Asynchronous operation.</param>
/// <returns>Returns true if aynchronous operation is pending (The <see cref="ListAsyncOP.CompletedAsync"/> event is raised upon completion of the operation).
/// Returns false if operation completed synchronously.</returns>
/// <exception cref="ObjectDisposedException">Is raised when this object is disposed and and this method is accessed.</exception>
/// <exception cref="InvalidOperationException">Is raised when POP3 client is not in valid state. For example 'not connected'.</exception>
/// <exception cref="ArgumentNullException">Is raised when <b>op</b> is null reference.</exception>
private bool ListAsync(ListAsyncOP op)
{
if(this.IsDisposed){
throw new ObjectDisposedException(this.GetType().Name);
}
if(!this.IsConnected){
throw new InvalidOperationException("You must connect first.");
}
if(op == null){
throw new ArgumentNullException("op");
}
if(op.State != AsyncOP_State.WaitingForStart){
throw new ArgumentException("Invalid argument 'op' state, 'op' must be in 'AsyncOP_State.WaitingForStart' state.","op");
}
return op.Start(this);
}
/// <summary>
/// Starts operation processing.
/// </summary>
/// <param name="owner">Owner POP3 client.</param>
/// <returns>Returns true if asynchronous operation in progress or false if operation completed synchronously.</returns>
/// <exception cref="ArgumentNullException">Is raised when <b>owner</b> is null reference.</exception>
internal bool Start(POP3_Client owner)
{
if(owner == null){
throw new ArgumentNullException("owner");
}
m_pPop3Client = owner;
SetState(AsyncOP_State.Active);
try{
// Start executing LIST command.
POP3_Client.ListAsyncOP listOP = new ListAsyncOP();
listOP.CompletedAsync += delegate(object sender,EventArgs<ListAsyncOP> e){
ListCompleted(listOP);
};
if(!m_pPop3Client.ListAsync(listOP)){
ListCompleted(listOP);
}
}
catch(Exception x){
m_pException = x;
m_pPop3Client.LogAddException("Exception: " + x.Message,x);
SetState(AsyncOP_State.Completed);
}
// Set flag rise CompletedAsync event flag. The event is raised when async op completes.
// If already completed sync, that flag has no effect.
lock(m_pLock){
m_RiseCompleted = true;
return m_State == AsyncOP_State.Active;
}
}
