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using System.Net.Http.Json;
using ArcaneLibs.Extensions;
using LibMatrix.Homeservers;
using LibMatrix.Responses;
using Microsoft.Extensions.Logging;
namespace LibMatrix.Services;
public class HomeserverProviderService(ILogger<HomeserverProviderService> logger) {
private static readonly Dictionary<string, SemaphoreSlim> AuthenticatedHomeserverSemaphore = new();
private static readonly Dictionary<string, AuthenticatedHomeserverGeneric> AuthenticatedHomeserverCache = new();
private static readonly Dictionary<string, SemaphoreSlim> RemoteHomeserverSemaphore = new();
private static readonly Dictionary<string, RemoteHomeserver> RemoteHomeserverCache = new();
public async Task<AuthenticatedHomeserverGeneric> GetAuthenticatedWithToken(string homeserver, string accessToken, string? proxy = null, string? impersonatedMxid = null) {
var cacheKey = homeserver + accessToken + proxy + impersonatedMxid;
var sem = AuthenticatedHomeserverSemaphore.GetOrCreate(cacheKey, _ => new SemaphoreSlim(1, 1));
await sem.WaitAsync();
AuthenticatedHomeserverGeneric? hs;
lock (AuthenticatedHomeserverCache) {
if (AuthenticatedHomeserverCache.TryGetValue(cacheKey, out hs)) {
sem.Release();
return hs;
}
}
var rhs = await RemoteHomeserver.Create(homeserver, proxy);
ClientVersionsResponse clientVersions = new();
try {
clientVersions = await rhs.GetClientVersionsAsync();
}
catch (Exception e) {
logger.LogError(e, "Failed to get client versions for {homeserver}", homeserver);
}
if (proxy is not null)
logger.LogInformation("Homeserver {homeserver} proxied via {proxy}...", homeserver, proxy);
logger.LogInformation("{homeserver}: {clientVersions}", homeserver, clientVersions.ToJson());
ServerVersionResponse serverVersion;
try {
serverVersion = serverVersion = await (rhs.FederationClient?.GetServerVersionAsync() ?? Task.FromResult<ServerVersionResponse?>(null)!);
}
catch (Exception e) {
logger.LogWarning(e, "Failed to get server version for {homeserver}", homeserver);
sem.Release();
throw;
}
try {
if (clientVersions.UnstableFeatures.TryGetValue("gay.rory.mxapiextensions.v0", out var a) && a)
hs = await AuthenticatedHomeserverGeneric.Create<AuthenticatedHomeserverMxApiExtended>(homeserver, accessToken, proxy);
else {
if (serverVersion is { Server.Name: "Synapse" })
hs = await AuthenticatedHomeserverGeneric.Create<AuthenticatedHomeserverSynapse>(homeserver, accessToken, proxy);
else
hs = await AuthenticatedHomeserverGeneric.Create<AuthenticatedHomeserverGeneric>(homeserver, accessToken, proxy);
}
}
catch (Exception e) {
logger.LogError(e, "Failed to create authenticated homeserver for {homeserver}", homeserver);
sem.Release();
throw;
}
if (impersonatedMxid is not null)
await hs.SetImpersonate(impersonatedMxid);
lock (AuthenticatedHomeserverCache) {
AuthenticatedHomeserverCache[cacheKey] = hs;
}
sem.Release();
return hs;
}
public async Task<RemoteHomeserver> GetRemoteHomeserver(string homeserver, string? proxy = null) {
var cacheKey = homeserver + proxy;
var sem = RemoteHomeserverSemaphore.GetOrCreate(cacheKey, _ => new SemaphoreSlim(1, 1));
await sem.WaitAsync();
RemoteHomeserver? hs;
lock (RemoteHomeserverCache) {
if (RemoteHomeserverCache.TryGetValue(cacheKey, out hs)) {
sem.Release();
return hs;
}
}
hs = await RemoteHomeserver.Create(homeserver, proxy);
lock (RemoteHomeserverCache) {
RemoteHomeserverCache[cacheKey] = hs;
}
sem.Release();
return hs;
}
public async Task<LoginResponse> Login(string homeserver, string user, string password, string? proxy = null) {
var hs = await GetRemoteHomeserver(homeserver, proxy);
var payload = new LoginRequest {
Identifier = new LoginRequest.LoginIdentifier { User = user },
Password = password
};
var resp = await hs.ClientHttpClient.PostAsJsonAsync("/_matrix/client/v3/login", payload);
var data = await resp.Content.ReadFromJsonAsync<LoginResponse>();
return data!;
}
}
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