78 lines
2.8 KiB
C#
78 lines
2.8 KiB
C#
 
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using System.Text.Json;
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using PrivaPub.Federation.Objects;
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namespace PrivaPub.Federation.Actors
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{
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public sealed record ActorKey(string Id, string Pem);
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public sealed class ActorDocument
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{
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static readonly string[] ActorTypes = { "Person", "Service", "Application", "Group", "Organization" };
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public string Id { get; init; }
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public string Type { get; init; }
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public string PreferredUsername { get; init; }
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public string Name { get; init; }
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public string Summary { get; init; }
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public string Url { get; init; }
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public string Inbox { get; init; }
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public string Outbox { get; init; }
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public string SharedInbox { get; init; }
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public string Icon { get; init; }
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public bool Discoverable { get; init; } = true;
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public IReadOnlyList<ActorKey> Keys { get; init; } = Array.Empty<ActorKey>();
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public ActorKey Key(string keyId) => Keys.FirstOrDefault(k => k.Id == keyId);
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public static ActorDocument Parse(JsonElement root)
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{
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if (root.ValueKind != JsonValueKind.Object)
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return default;
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var id = RemoteActorService.Text(root, "id");
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var type = RemoteActorService.Text(root, "type");
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if (Origin.Of(id) == default || !ActorTypes.Contains(type))
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return default;
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var inbox = RemoteActorService.Text(root, "inbox");
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return new ActorDocument
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{
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Id = id,
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Type = type,
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PreferredUsername = RemoteActorService.Text(root, "preferredUsername"),
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Name = RemoteActorService.Text(root, "name"),
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Summary = RemoteActorService.Text(root, "summary"),
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Url = RemoteActorService.Text(root, "url") ?? id,
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Inbox = Origin.Same(inbox, id) ? inbox : default,
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Outbox = RemoteActorService.Text(root, "outbox"),
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SharedInbox = root.TryGetProperty("endpoints", out var endpoints) ? RemoteActorService.Text(endpoints, "sharedInbox") : default,
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Icon = root.TryGetProperty("icon", out var icon) ? RemoteActorService.Text(icon, "url") : default,
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Discoverable = !root.TryGetProperty("discoverable", out var discoverable) || discoverable.ValueKind != JsonValueKind.False,
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Keys = ParseKeys(root, id)
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};
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}
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static List<ActorKey> ParseKeys(JsonElement root, string actorId)
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{
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var keys = new List<ActorKey>();
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if (!root.TryGetProperty("publicKey", out var publicKey))
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return keys;
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var candidates = publicKey.ValueKind switch
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{
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JsonValueKind.Object => new[] { publicKey },
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JsonValueKind.Array => publicKey.EnumerateArray().Where(k => k.ValueKind == JsonValueKind.Object).ToArray(),
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_ => Array.Empty<JsonElement>()
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};
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foreach (var key in candidates)
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{
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var keyId = RemoteActorService.Text(key, "id");
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var owner = RemoteActorService.Text(key, "owner");
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var pem = RemoteActorService.Text(key, "publicKeyPem");
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if (string.IsNullOrEmpty(pem) || owner != actorId || !Origin.Same(keyId, actorId))
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continue;
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keys.Add(new ActorKey(keyId, pem));
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}
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return keys;
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}
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}
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}
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