Implement Middleware-based message loop

[mottaghipour]

Please check example project :)

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[MajMcCloud]

@mottaghipour
Please write a more detailed description of features and functions for the ReadMe.

Thank you

[MajMcCloud]

@mottaghipour
Hey!

may you please take a look :-) ? So we can add it soon to the dev package first.
If you need some help , please let me know.

Thanks!

[mottaghipour]

Hi, I apologize, I haven't been active for a while.

So, this pull request :)

I remember wanting to use inline queries, but the forms didn't support it, so I customized this mechanism for myself, which is the main method I'm using in the usage examples here:

/// <summary>
///     Creates a bot with middleware message loop for handle inline queries
/// </summary>
private static BotBase GetInlineQueryBot()
{
    var bot = BotBaseBuilder
                .Create()
                .WithAPIKey("6989687640:AAFGnjKCa9OOpVyVAYuSpt-axjCHKWpA0sI")
                .MiddlewareMessageLoop(
                    messageLoop =>
                        messageLoop
                            .UseValidUpdateTypes(UpdateType.InlineQuery)
                            .Use(async (container, next) =>
                            {
                                var query = container.UpdateResult.RawData.InlineQuery.Query;

                                if (!string.IsNullOrWhiteSpace(query))
                                {
                                    // logic

                                    await next();
                                }

                                return;
                            }))
                .WithStartForm<StartForm>()
                .NoProxy()
                .DefaultCommands()
                .NoSerialization()
                .UsePersian()
                .Build();

    return bot;
}

Meanwhile, if the user wants to have a lightweight message loop, they can choose exactly what middleware to use, which is much more practical than your old message loops.

Regards

[mottaghipour]

Or sometimes we need an authentication middleware and with this mechanism you can implement your own custom authentication and block messages from unauthorized users.

[MajMcCloud]

Hey @mottaghipour

thanks for getting back. I will have a look at it the next days and add it to the development branch, so it can become a preview soon. Not sure if you wrote some example project or readme on how to use it.
Will check later then and get back if anything is needed.

Cheers
Florian