SocialPub/PrivaPub.Tests/Http/MastodonStatusesTests.cs

using PrivaPub.Tests.Support;
using PrivaPub.Tests.Support.Host;

using System.Net;
using System.Text.Json.Nodes;

namespace PrivaPub.Tests.Http
{
	[Trait("Category", "Integration")]
	public sealed class MastodonStatusesTests : IAsyncLifetime
	{
		PrivaPubHost _host;
		Peer _peer;

		public async ValueTask InitializeAsync()
		{
			Assert.SkipUnless(MongoFixture.Enabled, MongoFixture.Skip);
			_host = await PrivaPubHost.Shared();
			_peer = await Peer.Start();
		}

		public async ValueTask DisposeAsync()
		{
			if (_peer != default)
				await _peer.DisposeAsync();
		}

		static IEnumerable<string> Strings(JsonNode node) => node!.AsArray().Select(n => n!.GetValue<string>());

		static async Task<JsonObject> Image(Mastodon account) =>
			(await account.Client.Exchange(new HttpRequestMessage(HttpMethod.Post, "/api/v1/media")
			{
				Content = MastodonHelpers.Multipart(("file", MastodonHelpers.JpegWithMetadata(80, 60), "image/jpeg", "a.jpg"))
			})).Ok().Object;

		[Fact]
		public async Task Each_visibility_is_addressed_the_way_mastodon_addresses_it()
		{
			var since = DateTime.UtcNow.AddSeconds(-1);
			var alice = await _host.Mastodon("alice");
			var bob = new RemoteActor(_peer, "bob");
			var carol = new RemoteActor(_peer, "carol");
			await _host.FollowedBy(alice, bob);
			_peer.WebFinger(carol);
			var followers = alice.Uri + "/groupies";

			var open = await alice.Status("for everyone");
			var unlisted = await alice.Status("quietly public", ("visibility", "unlisted"));
			var quiet = await alice.Status("for followers", ("visibility", "private"));
			var direct = await alice.Status($"@{carol.Handle()} just you", ("visibility", "direct"));

			Assert.Equal(new[] { "public", "unlisted", "private", "direct" }, new[] { open, unlisted, quiet, direct }.Select(s => s.Text("visibility")));
			var creates = (await bob.Delivered(since)).Where(d => d.Type() == "Create").ToDictionary(d => d["object"].Text("id"));
			Assert.Equal(3, creates.Count);
			var publicNote = creates[open.Text("uri")]["object"];
			Assert.Equal(new[] { MastodonHelpers.Public }, Strings(publicNote["to"]));
			Assert.Equal(new[] { followers }, Strings(publicNote["cc"]));
			var unlistedNote = creates[unlisted.Text("uri")]["object"];
			Assert.Equal(new[] { followers }, Strings(unlistedNote["to"]));
			Assert.Equal(new[] { MastodonHelpers.Public }, Strings(unlistedNote["cc"]));
			var quietNote = creates[quiet.Text("uri")]["object"];
			Assert.Equal(new[] { followers }, Strings(quietNote["to"]));
			// named again in cc: Pleroma and Akkoma read an empty cc without a "/followers" address as a direct message
			Assert.Equal(new[] { followers }, Strings(quietNote["cc"]));
			var whisper = Assert.Single(await carol.Delivered(since));
			Assert.Equal(direct.Text("uri"), whisper["object"].Text("id"));
			Assert.Equal(new[] { carol.Id }, Strings(whisper["object"]!["to"]));
			Assert.Empty(whisper["object"]!["cc"]!.AsArray());
			Assert.Equal(carol.Handle(), Assert.Single(direct["mentions"]!.AsArray()).Text("acct"));
		}

		[Fact]
		public async Task A_content_warning_is_kept_as_spoiler_text_and_federates_as_a_summary()
		{
			var alice = await _host.Mastodon("alice");

			var warned = await alice.Status("the butler did it", ("spoiler_text", "spoilers"));

			Assert.True(warned.Flag("sensitive"));
			Assert.Equal("spoilers", warned.Text("spoiler_text"));
			var note = (await _host.ActivityPub($"/peasants/{alice.UserName}/scribbles/{warned.Text("id")}")).Ok().Body;
			Assert.Equal("spoilers", note.Text("summary"));
			Assert.True(note.Flag("sensitive"));
			Assert.Contains("the butler did it", note.Text("content"));
			Assert.Equal(HttpStatusCode.UnprocessableEntity, (await alice.Client.Post("/api/v1/statuses", ("status", " "))).Status);
		}

		[Fact]
		public async Task A_reply_to_a_local_post_threads_counts_and_shows_in_the_context()
		{
			var alice = await _host.Mastodon("alice");
			var bob = await _host.Mastodon("bob");
			var root = await alice.Status("what do you think?");

			var reply = await bob.Status("I agree", ("in_reply_to_id", root.Text("id")));
			var nested = await alice.Status("thanks", ("in_reply_to_id", reply.Text("id")));

			Assert.Equal(root.Text("id"), reply.Text("in_reply_to_id"));
			Assert.Equal(alice.Id, reply.Text("in_reply_to_account_id"));
			Assert.Equal(1, (await bob.Client.Get($"/api/v1/statuses/{root.Text("id")}")).Ok().Body.Number("replies_count"));
			var context = (await _host.Client().Get($"/api/v1/statuses/{reply.Text("id")}/context")).Ok();
			Assert.Equal(new[] { root.Text("id") }, context.Body["ancestors"]!.AsArray().Select(s => s.Text("id")));
			Assert.Equal(new[] { nested.Text("id") }, context.Body["descendants"]!.AsArray().Select(s => s.Text("id")));
			var whole = (await alice.Client.Get($"/api/v1/statuses/{root.Text("id")}/context")).Ok();
			Assert.Equal(new[] { reply.Text("id"), nested.Text("id") }, whole.Body["descendants"]!.AsArray().Select(s => s.Text("id")));
			Assert.Equal(HttpStatusCode.NotFound, (await bob.Client.Post("/api/v1/statuses", ("status", "lost"), ("in_reply_to_id", "000000000000000000000000"))).Status);
		}

		[Fact]
		public async Task A_reply_to_a_remote_post_mentions_its_author_and_reaches_its_inbox()
		{
			var since = DateTime.UtcNow.AddSeconds(-1);
			var alice = await _host.Mastodon("alice");
			var bob = new RemoteActor(_peer, "bob");
			_peer.WebFinger(bob);
			var parent = await _host.PublicPostFrom(bob, alice);
			var bobId = (await _host.Known(bob)).ID;

			var reply = await alice.Status($"@{bob.Handle()} well said", ("in_reply_to_id", parent.ID));

			Assert.Equal(parent.ID, reply.Text("in_reply_to_id"));
			Assert.Equal(bobId, reply.Text("in_reply_to_account_id"));
			var mention = Assert.Single(reply["mentions"]!.AsArray());
			Assert.Equal((bobId, bob.Handle()), (mention.Text("id"), mention.Text("acct")));
			var create = Assert.Single(await bob.Delivered(since), d => d.Type() == "Create");
			var note = create["object"]!;
			Assert.Equal(parent.ObjectURI, note.Text("inReplyTo"));
			Assert.Contains(bob.Id, Strings(note["cc"]));
			Assert.Contains(note["tag"]!.AsArray(), t => t.Text("type") == "Mention" && t.Text("href") == bob.Id);
			Assert.Equal(1, (await alice.Client.Get($"/api/v1/statuses/{parent.ID}")).Ok().Body.Number("replies_count"));
		}

		// Akkoma marks a post with sensitive media "sensitive" and leaves its summary empty: the media is hidden, the words are
		// not, and no warning is made up for them (found by decePub's e2e tests on the town)
		[Fact]
		public async Task A_remote_post_sensitive_without_a_summary_hides_its_media_and_not_its_words()
		{
			var alice = await _host.Mastodon("alice");
			var bob = new RemoteActor(_peer, "bob");
			_peer.WebFinger(bob);
			var post = await _host.PublicPostFrom(bob, alice, shape: note => { note["sensitive"] = true; note["summary"] = ""; });

			var status = (await alice.Client.Get($"/api/v1/statuses/{post.ID}")).Ok().Body;

			Assert.True(status["sensitive"]!.GetValue<bool>());
			Assert.Equal("", status.Text("spoiler_text"));
		}

		// a status asked for by id is shown even when the viewer blocked or muted its author, as Mastodon shows it: only lists
		// leave such posts out (it once answered 200 with null, and decePub's thread page showed nothing)
		[Fact]
		public async Task A_status_of_an_author_the_viewer_blocked_is_still_shown_by_its_id()
		{
			var alice = await _host.Mastodon("alice");
			var bob = new RemoteActor(_peer, "bob");
			_peer.WebFinger(bob);
			var post = await _host.PublicPostFrom(bob, alice);
			var bobId = (await _host.Known(bob)).ID;
			(await alice.Client.Post($"/api/v1/accounts/{bobId}/block")).Ok();

			var status = (await alice.Client.Get($"/api/v1/statuses/{post.ID}")).Ok().Body;

			Assert.Equal(post.ID, status.Text("id"));
		}

		// a reader who deletes the @name decePub prefills still answers its author: GoToSocial dropped such a reply, addressed
		// to nobody there (found by decePub's e2e tests on the town)
		[Fact]
		public async Task A_reply_without_the_authors_name_still_names_the_author_in_cc()
		{
			var since = DateTime.UtcNow.AddSeconds(-1);
			var alice = await _host.Mastodon("alice");
			var bob = new RemoteActor(_peer, "bob");
			_peer.WebFinger(bob);
			var parent = await _host.PublicPostFrom(bob, alice);

			var reply = await alice.Status("no name in this one", ("in_reply_to_id", parent.ID));

			Assert.Empty(reply["mentions"]!.AsArray());
			var create = Assert.Single(await bob.Delivered(since), d => d.Type() == "Create");
			Assert.Contains(bob.Id, Strings(create["object"]!["cc"]));
		}

		[Fact]
		public async Task A_poll_is_created_validated_and_federated_as_a_question()
		{
			var alice = await _host.Mastodon("alice");

			var status = await alice.Status("tea or coffee?", ("poll[options][]", "tea"), ("poll[options][]", "coffee"), ("poll[expires_in]", "600"),
				("poll[multiple]", "true"));

			var poll = status["poll"]!;
			Assert.Equal(new[] { "tea", "coffee" }, poll["options"]!.AsArray().Select(o => o.Text("title")));
			Assert.True(poll.Flag("multiple"));
			Assert.False(poll.Flag("expired"));
			Assert.NotNull(poll.Text("expires_at"));
			Assert.Equal(status.Text("id"), (await _host.Client().Get($"/api/v1/polls/{status.Text("id")}")).Ok().Body.Text("id"));
			var question = (await _host.ActivityPub($"/peasants/{alice.UserName}/scribbles/{status.Text("id")}")).Ok().Body;
			Assert.Equal("Question", question.Text("type"));
			Assert.Equal(2, question["anyOf"]!.AsArray().Count);
			Assert.Equal(HttpStatusCode.UnprocessableEntity, (await alice.Client.Post("/api/v1/statuses", ("status", "one?"), ("poll[options][]", "only"),
				("poll[expires_in]", "600"))).Status);
		}

		[Fact]
		public async Task Media_is_attached_only_by_its_owner()
		{
			var alice = await _host.Mastodon("alice");
			var mallory = await _host.Mastodon("mallory");
			var upload = await Image(alice);

			var status = await alice.Status("look", ("media_ids[]", upload.Text("id")));

			var attachment = Assert.Single(status["media_attachments"]!.AsArray());
			Assert.Equal(upload.Text("id"), attachment.Text("id"));
			Assert.Equal("image", attachment.Text("type"));
			var note = (await _host.ActivityPub($"/peasants/{alice.UserName}/scribbles/{status.Text("id")}")).Ok().Body;
			Assert.Equal(upload.Text("url"), Assert.Single(note["attachment"]!.AsArray()).Text("url"));
			Assert.Equal(HttpStatusCode.UnprocessableEntity, (await mallory.Client.Post("/api/v1/statuses", ("status", "mine"), ("media_ids[]", (await Image(alice)).Text("id")))).Status);
			Assert.Equal(HttpStatusCode.UnprocessableEntity, (await alice.Client.Post("/api/v1/statuses", ("status", "again"), ("media_ids[]", upload.Text("id")))).Status);
		}

		[Fact]
		public async Task A_quote_of_a_local_post_is_accepted_listed_and_revocable()
		{
			var alice = await _host.Mastodon("alice");
			var carol = await _host.Mastodon("carol");
			var original = await carol.Status("quote me");
			var closed = await carol.Status("do not quote me", ("quote_approval_policy", "nobody"));

			var quote = await alice.Status("so true", ("quoted_status_id", original.Text("id")));

			Assert.Equal("accepted", quote["quote"].Text("state"));
			Assert.Equal(original.Text("id"), quote["quote"]!["quoted_status"].Text("id"));
			Assert.Equal(1, (await carol.Client.Get($"/api/v1/statuses/{original.Text("id")}")).Ok().Body.Number("quotes_count"));
			Assert.Equal(new[] { quote.Text("id") }, (await _host.Client().Get($"/api/v1/statuses/{original.Text("id")}/quotes")).Ok().Ids);
			Assert.Equal(HttpStatusCode.UnprocessableEntity, (await alice.Client.Post("/api/v1/statuses", ("status", "anyway"), ("quoted_status_id", closed.Text("id")))).Status);
			Assert.Empty(closed["quote_approval"]!["automatic"]!.AsArray());

			Assert.Equal(HttpStatusCode.NotFound, (await alice.Client.Post($"/api/v1/statuses/{original.Text("id")}/quotes/{quote.Text("id")}/revoke")).Status);
			var revoked = (await carol.Client.Post($"/api/v1/statuses/{original.Text("id")}/quotes/{quote.Text("id")}/revoke")).Ok();

			Assert.Equal(quote.Text("id"), revoked.Body.Text("id"));
			Assert.Equal("revoked", revoked.Body["quote"].Text("state"));
			Assert.Empty((await carol.Client.Get($"/api/v1/statuses/{original.Text("id")}/quotes")).Ok().Array);
			Assert.Equal(0, (await carol.Client.Get($"/api/v1/statuses/{original.Text("id")}")).Ok().Body.Number("quotes_count"));
		}

		[Fact]
		public async Task An_edit_keeps_its_history_shows_its_source_and_federates_an_update()
		{
			var since = DateTime.UtcNow.AddSeconds(-1);
			var alice = await _host.Mastodon("alice");
			var other = await _host.Mastodon("other");
			var bob = new RemoteActor(_peer, "bob");
			await _host.FollowedBy(alice, bob);
			var status = await alice.Status("first version", ("spoiler_text", "cw"));
			var id = status.Text("id");

			var edited = (await alice.Client.Put($"/api/v1/statuses/{id}", ("status", "second version"))).Ok();

			Assert.NotNull(edited.Body.Text("edited_at"));
			Assert.Contains("second version", edited.Body.Text("content"));
			Assert.Contains("second version", (await other.Client.Get($"/api/v1/statuses/{id}")).Ok().Body.Text("content"));
			var history = (await _host.Client().Get($"/api/v1/statuses/{id}/history")).Ok().Array;
			Assert.Equal(2, history.Count);
			Assert.Contains("first version", history[0].Text("content"));
			Assert.Equal("cw", history[0].Text("spoiler_text"));
			Assert.Contains("second version", history[1].Text("content"));
			Assert.Equal(alice.Id, history[1]!["account"].Text("id"));
			var source = (await alice.Client.Get($"/api/v1/statuses/{id}/source")).Ok();
			Assert.Equal(("second version", ""), (source.Body.Text("text"), source.Body.Text("spoiler_text")));
			Assert.Equal(HttpStatusCode.NotFound, (await other.Client.Get($"/api/v1/statuses/{id}/source")).Status);
			Assert.Equal(HttpStatusCode.NotFound, (await other.Client.Put($"/api/v1/statuses/{id}", ("status", "hijacked"))).Status);
			var update = Assert.Single(await bob.Delivered(since), d => d.Type() == "Update");
			Assert.Equal(status.Text("uri"), update["object"].Text("id"));
			Assert.Contains("second version", update["object"].Text("content"));
		}

		[Fact]
		public async Task Delete_returns_the_text_for_a_redraft_and_leaves_a_tombstone()
		{
			var since = DateTime.UtcNow.AddSeconds(-1);
			var alice = await _host.Mastodon("alice");
			var other = await _host.Mastodon("other");
			var bob = new RemoteActor(_peer, "bob");
			await _host.FollowedBy(alice, bob);
			var status = await alice.Status("regrettable", ("spoiler_text", "hot take"));
			var id = status.Text("id");
			var scribble = $"/peasants/{alice.UserName}/scribbles/{id}";
			Assert.Equal(HttpStatusCode.OK, (await _host.ActivityPub(scribble)).Status);
			Assert.Equal(HttpStatusCode.NotFound, (await other.Client.Delete($"/api/v1/statuses/{id}")).Status);

			var deleted = (await alice.Client.Delete($"/api/v1/statuses/{id}")).Ok();

			Assert.Equal(id, deleted.Body.Text("id"));
			Assert.Equal("regrettable", deleted.Body.Text("text"));
			Assert.Equal("hot take", deleted.Body.Text("spoiler_text"));
			Assert.Equal(HttpStatusCode.NotFound, (await alice.Client.Get($"/api/v1/statuses/{id}")).Status);
			Assert.Equal(HttpStatusCode.NotFound, (await alice.Client.Delete($"/api/v1/statuses/{id}")).Status);
			var tombstone = await _host.ActivityPub(scribble);
			Assert.Equal(HttpStatusCode.Gone, tombstone.Status);
			Assert.Equal("Tombstone", tombstone.Body.Text("type"));
			Assert.Equal(status.Text("uri"), tombstone.Body.Text("id"));
			var delete = Assert.Single(await bob.Delivered(since), d => d.Type() == "Delete");
			Assert.Equal(status.Text("uri"), delete["object"].Text("id"));
		}

		[Fact]
		public async Task Favourites_and_reblogs_count_and_federate_with_their_undos()
		{
			var since = DateTime.UtcNow.AddSeconds(-1);
			var alice = await _host.Mastodon("alice");
			var carol = await _host.Mastodon("carol");
			var bob = new RemoteActor(_peer, "bob");
			var remote = await _host.PublicPostFrom(bob, alice);
			var path = $"/api/v1/statuses/{remote.ID}";

			var liked = (await alice.Client.Post(path + "/favourite")).Ok();
			Assert.True(liked.Body.Flag("favourited"));
			Assert.Equal(1, liked.Body.Number("favourites_count"));
			Assert.Equal(new[] { alice.Id }, (await _host.Client().Get(path + "/favourited_by")).Ok().Ids);
			Assert.Equal(1, (await alice.Client.Post(path + "/favourite")).Ok().Body.Number("favourites_count"));
			var unliked = (await alice.Client.Post(path + "/unfavourite")).Ok();
			Assert.False(unliked.Body.Flag("favourited"));
			Assert.Equal(0, unliked.Body.Number("favourites_count"));

			var reblog = (await alice.Client.Post(path + "/reblog")).Ok();
			Assert.Equal(remote.ID, reblog.Body["reblog"].Text("id"));
			Assert.True(reblog.Body["reblog"].Flag("reblogged"));
			Assert.Equal(1, reblog.Body["reblog"].Number("reblogs_count"));
			Assert.Equal(new[] { alice.Id }, (await carol.Client.Get(path + "/reblogged_by")).Ok().Ids);
			var unreblogged = (await alice.Client.Post(path + "/unreblog")).Ok();
			Assert.False(unreblogged.Body.Flag("reblogged"));
			Assert.Equal(0, unreblogged.Body.Number("reblogs_count"));
			Assert.Empty((await carol.Client.Get(path + "/reblogged_by")).Ok().Array);

			var sent = await bob.Delivered(since);
			var like = Assert.Single(sent, d => d.Type() == "Like");
			Assert.Equal((alice.Uri, remote.ObjectURI), (like.Text("actor"), like.Text("object")));
			var announce = Assert.Single(sent, d => d.Type() == "Announce");
			Assert.Equal(remote.ObjectURI, announce.Text("object"));
			var undos = sent.Where(d => d.Type() == "Undo").ToList();
			Assert.Equal(new[] { "Announce", "Like" }, undos.Select(u => u["object"].Text("type")).Order());
			Assert.Equal(like.Text("id"), undos.Single(u => u["object"].Text("type") == "Like")["object"].Text("id"));

			var local = await carol.Status("a local one");
			(await alice.Client.Post($"/api/v1/statuses/{local.Text("id")}/favourite")).Ok();
			var notification = Assert.Single((await carol.Client.Get("/api/v1/notifications?types[]=favourite")).Ok().Array);
			Assert.Equal((alice.Id, local.Text("id")), (notification["account"].Text("id"), notification["status"].Text("id")));
			var quiet = await carol.Status("followers only", ("visibility", "private"));
			(await alice.Client.Post($"/api/v1/accounts/{carol.Id}/follow")).Ok();
			Assert.Equal(HttpStatusCode.UnprocessableEntity, (await alice.Client.Post($"/api/v1/statuses/{quiet.Text("id")}/reblog")).Status);
			Assert.True((await alice.Client.Post($"/api/v1/statuses/{quiet.Text("id")}/favourite")).Ok().Body.Flag("favourited"));
		}

		[Fact]
		public async Task Bookmarks_are_kept_listed_and_removed()
		{
			var alice = await _host.Mastodon("alice");
			var carol = await _host.Mastodon("carol");
			var first = await carol.Status("worth keeping");
			var second = await carol.Status("this too");

			Assert.True((await alice.Client.Post($"/api/v1/statuses/{first.Text("id")}/bookmark")).Ok().Body.Flag("bookmarked"));
			(await alice.Client.Post($"/api/v1/statuses/{second.Text("id")}/bookmark")).Ok();
			(await alice.Client.Post($"/api/v1/statuses/{second.Text("id")}/bookmark")).Ok();

			Assert.Equal(new[] { second.Text("id"), first.Text("id") }, (await alice.Client.Get("/api/v1/bookmarks")).Ok().Ids);
			Assert.Empty((await carol.Client.Get("/api/v1/bookmarks")).Ok().Array);
			var page = (await alice.Client.Get("/api/v1/bookmarks?limit=1")).Ok();
			Assert.Equal(new[] { second.Text("id") }, page.Ids);
			Assert.Equal(new[] { first.Text("id") }, (await alice.Client.Get(page.Link("next"))).Ok().Ids);
			Assert.False((await alice.Client.Post($"/api/v1/statuses/{first.Text("id")}/unbookmark")).Ok().Body.Flag("bookmarked"));
			Assert.Equal(new[] { second.Text("id") }, (await alice.Client.Get("/api/v1/bookmarks")).Ok().Ids);
			Assert.Equal(HttpStatusCode.NotFound, (await alice.Client.Post("/api/v1/statuses/000000000000000000000000/bookmark")).Status);
		}

		[Fact]
		public async Task Pins_take_only_the_owners_public_posts()
		{
			var alice = await _host.Mastodon("alice");
			var carol = await _host.Mastodon("carol");
			var mine = await alice.Status("pin me");
			var quiet = await alice.Status("not this", ("visibility", "private"));
			var theirs = await carol.Status("not yours");

			Assert.True((await alice.Client.Post($"/api/v1/statuses/{mine.Text("id")}/pin")).Ok().Body.Flag("pinned"));
			Assert.Equal(HttpStatusCode.UnprocessableEntity, (await alice.Client.Post($"/api/v1/statuses/{theirs.Text("id")}/pin")).Status);
			Assert.Equal(HttpStatusCode.UnprocessableEntity, (await alice.Client.Post($"/api/v1/statuses/{quiet.Text("id")}/pin")).Status);
			Assert.Equal(HttpStatusCode.NotFound, (await carol.Client.Post($"/api/v1/statuses/{quiet.Text("id")}/pin")).Status);
			var featured = (await _host.ActivityPub($"/peasants/{alice.UserName}/trophies")).Ok().Body;
			Assert.Equal(mine.Text("uri"), Assert.Single(featured["orderedItems"]!.AsArray()).Text("id"));

			for (var i = 0; i < 4; i++)
				(await alice.Client.Post($"/api/v1/statuses/{(await alice.Status($"more {i}")).Text("id")}/pin")).Ok();
			Assert.Equal(HttpStatusCode.UnprocessableEntity, (await alice.Client.Post($"/api/v1/statuses/{(await alice.Status("one too many")).Text("id")}/pin")).Status);

			Assert.False((await alice.Client.Post($"/api/v1/statuses/{mine.Text("id")}/unpin")).Ok().Body.Flag("pinned"));
			Assert.Equal(4, (await alice.Client.Get($"/api/v1/accounts/{alice.Id}/statuses?pinned=true")).Ok().Array.Count);
		}

		[Fact]
		public async Task The_interaction_policy_sets_who_may_quote_and_matches_the_activitypub_note()
		{
			var since = DateTime.UtcNow.AddSeconds(-1);
			var alice = await _host.Mastodon("alice");
			var bob = new RemoteActor(_peer, "bob");
			await _host.FollowedBy(alice, bob);
			var open = await alice.Status("quotable");
			var quiet = await alice.Status("followers only", ("visibility", "private"));
			var scribble = $"/peasants/{alice.UserName}/scribbles/{open.Text("id")}";
			string CanQuote(JsonNode note) => Assert.Single(note["interactionPolicy"]!["canQuote"]!["automaticApproval"]!.AsArray())!.GetValue<string>();

			Assert.Equal(new[] { "public" }, Strings(open["quote_approval"]!["automatic"]));
			Assert.Equal(MastodonHelpers.Public, CanQuote((await _host.ActivityPub(scribble)).Ok().Body));

			var followers = (await alice.Client.Put($"/api/v1/statuses/{open.Text("id")}/interaction_policy", ("quote_approval_policy", "followers"))).Ok();
			Assert.Equal(new[] { "followers" }, Strings(followers.Body["quote_approval"]!["automatic"]));
			Assert.Equal(alice.Uri + "/groupies", CanQuote((await _host.ActivityPub(scribble)).Ok().Body));

			var nobody = (await alice.Client.Put($"/api/v1/statuses/{open.Text("id")}/interaction_policy", ("quote_approval_policy", "nobody"))).Ok();
			Assert.Empty(nobody.Body["quote_approval"]!["automatic"]!.AsArray());
			Assert.Equal(alice.Uri, CanQuote((await _host.ActivityPub(scribble)).Ok().Body));

			var forced = (await alice.Client.Put($"/api/v1/statuses/{quiet.Text("id")}/interaction_policy", ("quote_approval_policy", "public"))).Ok();
			Assert.Empty(forced.Body["quote_approval"]!["automatic"]!.AsArray());
			var updates = (await bob.Delivered(since)).Where(d => d.Type() == "Update").ToList();
			Assert.Equal(3, updates.Count);
			Assert.Equal(alice.Uri, CanQuote(updates.Single(u => u["object"].Text("id") == quiet.Text("uri"))["object"]));
			Assert.Equal(HttpStatusCode.UnprocessableEntity,
				(await alice.Client.Put($"/api/v1/statuses/{open.Text("id")}/interaction_policy", ("quote_approval_policy", "everyone"))).Status);
			Assert.Equal(HttpStatusCode.NotFound,
				(await (await _host.Mastodon("other")).Client.Put($"/api/v1/statuses/{open.Text("id")}/interaction_policy", ("quote_approval_policy", "public"))).Status);
		}

		[Fact]
		public async Task A_stranger_gets_404_for_followers_only_and_direct_posts()
		{
			var alice = await _host.Mastodon("alice");
			var follower = await _host.Mastodon("follower");
			var friend = await _host.Mastodon("friend");
			var stranger = await _host.Mastodon("stranger");
			(await follower.Client.Post($"/api/v1/accounts/{alice.Id}/follow")).Ok();
			var quiet = await alice.Status("followers only", ("visibility", "private"));
			var direct = await alice.Status($"@{friend.UserName} only you", ("visibility", "direct"));
			var anonymous = _host.Client();

			foreach (var id in new[] { quiet.Text("id"), direct.Text("id") })
			{
				Assert.Equal(HttpStatusCode.NotFound, (await stranger.Client.Get($"/api/v1/statuses/{id}")).Status);
				Assert.Equal(HttpStatusCode.NotFound, (await stranger.Client.Get($"/api/v1/statuses/{id}/context")).Status);
				Assert.Equal(HttpStatusCode.NotFound, (await stranger.Client.Post($"/api/v1/statuses/{id}/favourite")).Status);
				Assert.Equal(HttpStatusCode.NotFound, (await stranger.Client.Post($"/api/v1/statuses/{id}/bookmark")).Status);
				Assert.Equal(HttpStatusCode.NotFound, (await stranger.Client.Post("/api/v1/statuses", ("status", "re"), ("in_reply_to_id", id))).Status);
				Assert.Equal(HttpStatusCode.NotFound, (await anonymous.Get($"/api/v1/statuses/{id}")).Status);
				Assert.Equal(HttpStatusCode.NotFound, (await anonymous.Get($"/api/v1/statuses/{id}/favourited_by")).Status);
			}
			Assert.Empty((await stranger.Client.Get($"/api/v1/statuses?id[]={quiet.Text("id")}&id[]={direct.Text("id")}")).Ok().Array);
			Assert.Equal(new[] { quiet.Text("id") }, (await follower.Client.Get($"/api/v1/statuses?id[]={quiet.Text("id")}&id[]={direct.Text("id")}")).Ok().Ids);
			Assert.Equal(new[] { direct.Text("id") }, (await friend.Client.Get($"/api/v1/statuses?id[]={quiet.Text("id")}&id[]={direct.Text("id")}")).Ok().Ids);
			Assert.Equal(HttpStatusCode.OK, (await follower.Client.Get($"/api/v1/statuses/{quiet.Text("id")}/context")).Status);
			Assert.Equal(quiet.Text("id"), (await follower.Client.Post("/api/v1/statuses", ("status", "re"), ("in_reply_to_id", quiet.Text("id")))).Ok().Body.Text("in_reply_to_id"));
			Assert.Equal(HttpStatusCode.NotFound, (await _host.ActivityPub($"/peasants/{alice.UserName}/scribbles/{quiet.Text("id")}")).Status);
		}

		[Fact]
		public async Task A_located_post_is_never_reachable_by_id_by_anyone_else()
		{
			var alice = await _host.Mastodon("alice");
			var other = await _host.Mastodon("other");
			var id = await _host.Located(alice, "the bench by the river");
			var anonymous = _host.Client();

			foreach (var client in new[] { other.Client, anonymous })
			{
				foreach (var path in new[] { "", "/context", "/history", "/favourited_by", "/reblogged_by", "/quotes" })
					Assert.Equal(HttpStatusCode.NotFound, (await client.Get($"/api/v1/statuses/{id}{path}")).Status);
				Assert.Equal(HttpStatusCode.NotFound, (await client.Get($"/api/privapub/v1/statuses/{id}/provenance")).Status);
				Assert.Equal(HttpStatusCode.NotFound, (await client.Get($"/api/v1/pleroma/statuses/{id}/reactions")).Status);
				Assert.Equal(HttpStatusCode.NotFound, (await client.Get($"/api/v1/polls/{id}")).Status);
				Assert.Empty((await client.Get($"/api/v1/statuses?id[]={id}")).Ok().Array);
				Assert.DoesNotContain(id, (await client.Get($"/api/v1/accounts/{alice.Id}/statuses")).Ok().Ids);
			}
			foreach (var action in new[] { "favourite", "reblog", "bookmark", "pin" })
				Assert.Equal(HttpStatusCode.NotFound, (await other.Client.Post($"/api/v1/statuses/{id}/{action}")).Status);
			Assert.Equal(HttpStatusCode.NotFound, (await other.Client.Put($"/api/v1/pleroma/statuses/{id}/reactions/%F0%9F%91%8D")).Status);
			Assert.Equal(HttpStatusCode.NotFound, (await other.Client.Post("/api/v1/statuses", ("status", "re"), ("in_reply_to_id", id))).Status);
			Assert.Equal(HttpStatusCode.NotFound, (await other.Client.Post("/api/v1/statuses", ("status", "qt"), ("quoted_status_id", id))).Status);
			Assert.Equal(HttpStatusCode.NotFound, (await _host.ActivityPub($"/peasants/{alice.UserName}/scribbles/{id}")).Status);
		}

		[Fact]
		public async Task Creating_honours_the_idempotency_key_the_scopes_and_needs_a_recipient_for_a_direct_message()
		{
			var alice = await _host.Mastodon("alice");
			var reader = await _host.Mastodon("reader", scopes: "read");
			var key = Guid.NewGuid().ToString("N");
			Task<ApiAnswer> Keyed(string text)
			{
				var request = new HttpRequestMessage(HttpMethod.Post, "/api/v1/statuses") { Content = new FormUrlEncodedContent(new Dictionary<string, string> { ["status"] = text }) };
				request.Headers.Add("Idempotency-Key", key);
				return alice.Client.Exchange(request);
			}

			var first = (await Keyed("once")).Ok();
			var second = (await Keyed("once again")).Ok();

			Assert.Equal(first.Body.Text("id"), second.Body.Text("id"));
			Assert.Single((await alice.Client.Get($"/api/v1/accounts/{alice.Id}/statuses")).Ok().Array);
			var noRecipient = await alice.Client.Post("/api/v1/statuses", ("status", "to nobody"), ("visibility", "direct"));
			Assert.Equal(HttpStatusCode.UnprocessableEntity, noRecipient.Status);
			Assert.Contains("recipient", noRecipient.Body.Text("error"));
			Assert.Equal(HttpStatusCode.Forbidden, (await reader.Client.Post("/api/v1/statuses", ("status", "read only"))).Status);
			Assert.Equal(HttpStatusCode.Forbidden, (await reader.Client.Post($"/api/v1/statuses/{first.Body.Text("id")}/favourite")).Status);
			Assert.Equal(HttpStatusCode.OK, (await reader.Client.Get($"/api/v1/statuses/{first.Body.Text("id")}")).Status);
			Assert.Equal(HttpStatusCode.Unauthorized, (await _host.Client().Post("/api/v1/statuses", ("status", "anonymous"))).Status);
		}

		[Fact]
		public async Task Local_polls_take_one_vote_per_persona_and_never_from_their_author()
		{
			var alice = await _host.Mastodon("alice");
			var carol = await _host.Mastodon("carol");
			var poll = await alice.Status("pick one", ("poll[options][]", "red"), ("poll[options][]", "blue"), ("poll[expires_in]", "3600"));
			var path = $"/api/v1/polls/{poll.Text("id")}";

			var voted = (await carol.Client.Post(path + "/votes", ("choices[]", "1"))).Ok();

			Assert.True(voted.Body.Flag("voted"));
			Assert.Equal(new[] { 1 }, voted.Body["own_votes"]!.AsArray().Select(v => v!.GetValue<int>()));
			Assert.Equal(1, voted.Body.Number("votes_count"));
			Assert.Equal(HttpStatusCode.UnprocessableEntity, (await carol.Client.Post(path + "/votes", ("choices[]", "0"))).Status);
			Assert.Equal(HttpStatusCode.UnprocessableEntity, (await alice.Client.Post(path + "/votes", ("choices[]", "0"))).Status);
			Assert.Equal(HttpStatusCode.UnprocessableEntity, (await (await _host.Mastodon("dave")).Client.Post(path + "/votes", ("choices[]", "0"), ("choices[]", "1"))).Status);
			Assert.Equal(HttpStatusCode.UnprocessableEntity, (await (await _host.Mastodon("erin")).Client.Post(path + "/votes", ("choices[]", "7"))).Status);
			var anonymous = (await _host.Client().Get(path)).Ok();
			Assert.Null(anonymous.Body["voted"]);
			Assert.Equal(new[] { 0, 1 }, anonymous.Body["options"]!.AsArray().Select(o => o.Number("votes_count")));
		}

		[Fact]
		public async Task A_vote_on_a_remote_poll_goes_only_to_its_author_without_a_published_date()
		{
			var since = DateTime.UtcNow.AddSeconds(-1);
			var alice = await _host.Mastodon("alice");
			var bob = new RemoteActor(_peer, "bob");
			var carol = new RemoteActor(_peer, "carol");
			await _host.FollowedBy(alice, carol);
			var question = await _host.PublicPostFrom(bob, alice, "<p>which?</p>", note =>
			{
				note["type"] = "Question";
				note["oneOf"] = new JsonArray(
					new JsonObject { ["type"] = "Note", ["name"] = "this", ["replies"] = new JsonObject { ["type"] = "Collection", ["totalItems"] = 0 } },
					new JsonObject { ["type"] = "Note", ["name"] = "that", ["replies"] = new JsonObject { ["type"] = "Collection", ["totalItems"] = 0 } });
				note["endTime"] = DateTime.UtcNow.AddDays(1).ToString("O");
			});

			var voted = (await alice.Client.Post($"/api/v1/polls/{question.ID}/votes", ("choices[]", "1"))).Ok();

			Assert.True(voted.Body.Flag("voted"));
			var vote = Assert.Single(await bob.Delivered(since), d => d.Type() == "Create");
			Assert.Equal("that", vote["object"].Text("name"));
			Assert.Equal(question.ObjectURI, vote["object"].Text("inReplyTo"));
			Assert.Null(vote["object"]!["published"]);
			Assert.Equal(new[] { bob.Id }, Strings(vote["object"]!["to"]));
			Assert.DoesNotContain(await carol.Delivered(since), d => d.Type() == "Create");
		}

		[Fact]
		public async Task Deleting_a_reblog_undoes_it()
		{
			var since = DateTime.UtcNow.AddSeconds(-1);
			var alice = await _host.Mastodon("alice");
			var bob = new RemoteActor(_peer, "bob");
			var remote = await _host.PublicPostFrom(bob, alice);
			var reblog = (await alice.Client.Post($"/api/v1/statuses/{remote.ID}/reblog")).Ok().Body;

			(await alice.Client.Delete($"/api/v1/statuses/{reblog.Text("id")}")).Ok();

			Assert.False((await alice.Client.Get($"/api/v1/statuses/{remote.ID}")).Ok().Body.Flag("reblogged"));
			Assert.Equal(HttpStatusCode.NotFound, (await alice.Client.Get($"/api/v1/statuses/{reblog.Text("id")}")).Status);
			var undo = Assert.Single(await bob.Delivered(since), d => d.Type() == "Undo");
			Assert.Equal("Announce", undo["object"].Text("type"));
		}

		[Fact]
		public async Task Many_statuses_are_fetched_by_id_in_one_call()
		{
			var alice = await _host.Mastodon("alice");
			var first = await alice.Status("one");
			var second = await alice.Status("two");

			var answer = (await _host.Client().Get($"/api/v1/statuses?id[]={first.Text("id")}&id[]={second.Text("id")}&id[]=junk")).Ok();

			Assert.Equal(new[] { first.Text("id"), second.Text("id") }, answer.Ids.Order());
			Assert.Empty((await _host.Client().Get("/api/v1/statuses")).Ok().Array);
		}
	}
}