FishyFlip 1.4.19

FishyFlip - a .NET ATProtocol/Bluesky Library

FishyFlip is an implementation of ATProtocol for .NET, forked from bluesky-net.

It is currently under construction.

For a Blazor WASM demo, check out https://drasticactions.github.io/FishyFlip

Third-Party Libraries

• Nerdbank.GitVersioning

FishyFlip

• Forked from bluesky-net.
• CBOR
• net-ipfs-core
• OneOf

bskycli

• CommandLineParser

How To Use

• Use ATProtocolBuilder to build a new instance of ATProtocol

// Include a ILogger if you want additional logging from the base library.
var debugLog = new DebugLoggerProvider();
var atProtocolBuilder = new ATProtocolBuilder()
    .EnableAutoRenewSession(true)
// Set the instance URL for the PDS you wish to connect to.
// Defaults to bsky.social.
    .WithInstanceUrl(new Uri("https://drasticactions.ninja"))
    .WithLogger(debugLog.CreateLogger("FishyFlipDebug"));
var atProtocol = atProtocolBuilder.Build();

• Once created, you can now access unauthenticated APIs. For example, to get a list of posts from a user...

// Calls com.atproto.repo.listRecords for da-admin.drasticactions.ninja.
// ATHandle and ATDid are identifiers and can be used for most endpoints,
// such as for ListRecord points like below.
var listRecords = await atProtocol.Repo.ListPostAsync(ATHandle.Create("da-admin.drasticactions.ninja"));

// Each endpoint returns a Result<T>.
// This was originally taken from bluesky-net, which itself took it from OneOf.
// This is a pattern match object which can either be the "Success" object, 
// or an "Error" object. The "Error" object will always be the type of "Error" and always be from the Bluesky API.
// This would be where you would handle things like authentication errors and the like.
listRecords.Switch(
    success => { 
        foreach(var post in success!.Records)
        {
            // Prints the CID and ATURI of each post.
            Console.WriteLine($"CID: {post.Cid} Uri: {post.Uri}");
            // Value is `ATRecord`, a base type.
            // We can check if it's a Post and get its true value.
            if (post.Value is Post atPost)
            {
                Console.WriteLine(atPost.Text);
            }
        }
    },
    error =>
    {
        Console.WriteLine($"Error: {error.StatusCode} {error.Detail}");
    }
);

• Instead of pattern matching, you can also use .HandleResult() to return the success object, and throw an exception upon an error.

var listRecords = (await atProtocol.Repo.ListPostAsync(ATHandle.Create("da-admin.drasticactions.ninja"))).HandleResult();

• To log in, we need to create a session. This is applied to all ATProtocol calls once applied. If you need to create calls from a non-auth user session, create a new ATProtocol or destroy the existing session.

// While this accepts normal passwords, you should ask users
// to create an app password from their accounts to use it instead.
Result<Session> result = await atProtocol.Server.CreateSessionAsync(userName, password, CancellationToken.None);

result.Switch(
    success =>
    {
        // Contains the session information and tokens used internally.
        Console.WriteLine($"Session: {success.Did}");
    },
    error =>
    {
        Console.WriteLine($"Error: {error.StatusCode} {error.Detail}");
    }
);

// Creates a text post of "Hello, World!" to the signed in users account.
var postResult = await atProtocol.Repo.CreatePostAsync("Hello, World!");
postResult.Switch(
    success =>
    {
        // Contains the ATUri and CID.
        Console.WriteLine($"Post: {success.Uri} {success.Cid}");
    },
    error =>
    {
        Console.WriteLine($"Error: {error.StatusCode} {error.Detail}");
    }
);

• To upload an image, you need to first upload it as a blob, and then attach it to a post. You can also embed links in text by setting a "Link" Facet.

var stream = File.OpenRead("path/to/image.png");
var content = new StreamContent(stream);
content.Headers.ContentLength = stream.Length;
// Bluesky uses the content type header for setting the blob type.
// As of this writing, it does not verify what kind of blob gets uploaded.
// But you should be careful about setting generic types or using the wrong one.
// If you do not set a type, it will return an error.
content.Headers.ContentType = new MediaTypeHeaderValue("image/png");
var blobResult = await atProtocol.Repo.UploadBlobAsync(content);
await blobResult.SwitchAsync(
       async success =>
       {
           // Blob is uploaded.
           Console.WriteLine($"Blob: {success.Blob.Type}");
           // Converts the blob to an image.
           Image? image = success.Blob.ToImage();

           var prompt = "Hello, Image! Link Goes Here!";

           // To insert a link, we need to find the start and end of the link text.
           // This is done as a "ByteSlice."
           int promptStart = prompt.IndexOf("Link Goes Here!", StringComparison.InvariantCulture);
           int promptEnd = promptStart + Encoding.Default.GetBytes("Link Goes Here!").Length;
           var index = new FacetIndex(promptStart, promptEnd);
           var link = FacetFeature.CreateLink("https://drasticactions.dev");
           var facet = new Facet(index, link);

           // Create a post with the image and the link.
           var postResult = await atProtocol.Repo.CreatePostAsync(prompt, new[] { facet }, new ImagesEmbed(image, "Optional Alt Text, you should have your users set this when possible"));
       },
       async error =>
       {
            Console.WriteLine($"Error: {error.StatusCode} {error.Detail}");
       }
);

You should then see your image and link.

• You can access the "Firehose" by using SubscribeRepos. This can be seen in the FishyFlip.Firehose sample. SubscribeRepos uses Websockets to connect to a given instead and get messages whenever a new one is posted. Messages need to be handled outside of the general WebSocket stream; if anything blocks the stream from returning messages, you may see errors from the protocol saying your connection is too slow.

var debugLog = new DebugLoggerProvider();
var atProtocolBuilder = new ATWebSocketProtocolBuilder()
// Defaults to bsky.network.
    .WithInstanceUrl(new Uri("https://drasticactions.ninja"))
    .WithLogger(debugLog.CreateLogger("FishyFlipDebug"));
var atProtocol = atProtocolBuilder.Build();

atProtocol.OnSubscribedRepoMessage += (sender, args) =>
{
    Task.Run(() => HandleMessageAsync(args.Message)).FireAndForgetSafeAsync();
};

await atProtocol.StartSubscribeReposAsync();

var key = Console.ReadKey();

await atProtocol.StopSubscriptionAsync();

async Task HandleMessageAsync(SubscribeRepoMessage message)
{
    if (message.Commit is null)
    {
        return;
    }

    var orgId = message.Commit.Repo;

    if (orgId is null)
    {
        return;
    }

    if (message.Record is not null)
    {
        Console.WriteLine($"Record: {message.Record.Type}");
    }
}

• Sync endpoints generally encode their output as IPFS Car files. Here, we can process them as they are streaming so instead of needing to download a whole file to process it, we can do it as it is downloading. This is done by using the OnCarDecoded delegate.

var debugLog = new DebugLoggerProvider();
var atProtocolBuilder = new ATProtocolBuilder()
    .EnableAutoRenewSession(true)
    .WithInstanceUrl(new Uri("https://drasticactions.ninja"))
    .WithLogger(debugLog.CreateLogger("FishyFlipDebug"));
var atProtocol = atProtocolBuilder.Build();

var checkoutResult = await atProtocol.Sync.GetCheckoutAsync(ATDid.Create("did:plc:yhgc5rlqhoezrx6fbawajxlh"), HandleProgressStatus);

async void HandleProgressStatus(CarProgressStatusEvent e)
{
    var cid = e.Cid;
    var bytes = e.Bytes;
    var test = CBORObject.DecodeFromBytes(bytes);
    var record = ATRecord.FromCBORObject(test);
    // Prints the type of the record.
    Console.WriteLine(record?.Type);
}

For more samples, check the apps, samples, and website directory.

Endpoints

As a general rule of thumb, com.atproto endpoints (such as com.atproto.sync) do not require authentication, where app.bsky ones do.

❌ - Not Implemented ⚠️ - Partial support, untested ✅ - Should be "working"

Sync

Actor

Feed

Graph

Notification

Server

Repo

Moderation

Labels

Identity

Admin

Unspecced

Temp

Why "FishyFlip?"

"FishyFlip" is a reference to the Your Kickstarter Sucks episode of the same name.