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using System.Text.Json.Serialization;
using LibMatrix.Extensions;
using LibMatrix.Services;
using Microsoft.VisualBasic.CompilerServices;
namespace LibMatrix.Homeservers;
public class FederationClient {
public FederationClient(string federationEndpoint, string? proxy = null) {
HttpClient = new MatrixHttpClient {
BaseAddress = new Uri(proxy?.TrimEnd('/') ?? federationEndpoint.TrimEnd('/')),
// Timeout = TimeSpan.FromSeconds(120) // TODO: Re-implement this
};
if (proxy is not null) HttpClient.DefaultRequestHeaders.Add("MXAE_UPSTREAM", federationEndpoint);
}
public MatrixHttpClient HttpClient { get; set; }
public HomeserverResolverService.WellKnownUris WellKnownUris { get; set; }
public async Task<ServerVersionResponse> GetServerVersionAsync() => await HttpClient.GetFromJsonAsync<ServerVersionResponse>("/_matrix/federation/v1/version");
public async Task<ServerKeysResponse> GetServerKeysAsync() => await HttpClient.GetFromJsonAsync<ServerKeysResponse>("/_matrix/key/v2/server");
}
public class ServerKeysResponse {
[JsonPropertyName("server_name")]
public string ServerName { get; set; }
[JsonPropertyName("valid_until_ts")]
public ulong ValidUntilTs { get; set; }
[JsonIgnore]
public DateTime ValidUntil {
get => DateTimeOffset.FromUnixTimeMilliseconds((long)ValidUntilTs).DateTime;
set => ValidUntilTs = (ulong)new DateTimeOffset(value).ToUnixTimeMilliseconds();
}
[JsonPropertyName("verify_keys")]
public Dictionary<string, CurrentVerifyKey> VerifyKeys { get; set; } = new();
[JsonIgnore]
public Dictionary<VersionedKeyId, CurrentVerifyKey> VerifyKeysById {
get => VerifyKeys.ToDictionary(key => (VersionedKeyId)key.Key, key => key.Value);
set => VerifyKeys = value.ToDictionary(key => (string)key.Key, key => key.Value);
}
[JsonPropertyName("old_verify_keys")]
public Dictionary<string, ExpiredVerifyKey> OldVerifyKeys { get; set; } = new();
[JsonIgnore]
public Dictionary<VersionedKeyId, ExpiredVerifyKey> OldVerifyKeysById {
get => OldVerifyKeys.ToDictionary(key => (VersionedKeyId)key.Key, key => key.Value);
set => OldVerifyKeys = value.ToDictionary(key => (string)key.Key, key => key.Value);
}
public class VersionedKeyId {
public required string Algorithm { get; set; }
public required string KeyId { get; set; }
public static implicit operator VersionedKeyId(string key) {
var parts = key.Split(':', 2);
if (parts.Length != 2) throw new ArgumentException("Invalid key format. Expected 'algorithm:keyId'.", nameof(key));
return new VersionedKeyId { Algorithm = parts[0], KeyId = parts[1] };
}
public static implicit operator string(VersionedKeyId key) => $"{key.Algorithm}:{key.KeyId}";
public static implicit operator (string, string)(VersionedKeyId key) => (key.Algorithm, key.KeyId);
public static implicit operator VersionedKeyId((string algorithm, string keyId) key) => (key.algorithm, key.keyId);
}
public class CurrentVerifyKey {
[JsonPropertyName("key")]
public string Key { get; set; }
}
public class ExpiredVerifyKey : CurrentVerifyKey {
[JsonPropertyName("expired_ts")]
public ulong ExpiredTs { get; set; }
[JsonIgnore]
public DateTime Expired {
get => DateTimeOffset.FromUnixTimeMilliseconds((long)ExpiredTs).DateTime;
set => ExpiredTs = (ulong)new DateTimeOffset(value).ToUnixTimeMilliseconds();
}
}
}
public class ServerVersionResponse {
[JsonPropertyName("server")]
public required ServerInfo Server { get; set; }
public class ServerInfo {
[JsonPropertyName("name")]
public string Name { get; set; }
[JsonPropertyName("version")]
public string Version { get; set; }
}
}
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