/// <summary>
/// Passes an update to the chain for handling
/// </summary>
/// <param name="args">Data structure containing relevant references for update handling</param>
public async Task Handle(UpdateHandlerArgs args)
{
// Catch exceptions so they don't cause the entire service to crash
try
{
if ((null == HandlesUpdateType) || (args.Update.Type == HandlesUpdateType))
{
await HandlerLogicImpl(args);
}
}
catch (Exception e)
{
await Say.Error($"Internal error while handling update {args.Update.Id}: {e.Message}");
}
// End of the chain has reached as soon as the update has been marked as handled
if (args.Handled)
{
return;
}
// Invoke next handler in chain, otherwise throw Exception that update was not handled
if (null != _nextHandler)
{
await _nextHandler.Handle(args);
}
else
{
throw new UpdateNotHandledException(args.Update);
}
}
/// <summary>
/// Filters for supported commands
/// </summary>
protected override async Task MessageUpdateHandlerLogicImpl(UpdateHandlerArgs args)
{
if (!HandlesCommands.Contains(args.MessageArgs.CommandTokens[0].Trim().ToLower()))
{
return;
}
await CommandTextMessageUpdateHandlerLogicImpl(args);
}
/// <summary>
/// Basic filtering for messages of type MessageUpdateType
/// </summary>
protected override async Task HandlerLogicImpl(UpdateHandlerArgs args)
{
if (null != HandlesMessageType)
{
if (args.MessageArgs.Message.Type != HandlesMessageType)
{
return;
}
}
await MessageUpdateHandlerLogicImpl(args);
}
/// <summary> /// Implements the actual logic for handling upats /// </summary> /// <param name="args">Data structure containing relevant references for update handling</param> protected abstract Task HandlerLogicImpl(UpdateHandlerArgs args);
/// <summary> /// Implements the logic for the selected commands /// </summary> protected abstract Task CommandTextMessageUpdateHandlerLogicImpl(UpdateHandlerArgs args);