Split LibMatrix into separate repo

4 files changed, 224 insertions, 0 deletions

diff --git a/LibMatrix/Services/HomeserverProviderService.cs b/LibMatrix/Services/HomeserverProviderService.cs
new file mode 100644
index 0000000..61c449a
--- /dev/null
+++ b/LibMatrix/Services/HomeserverProviderService.cs
@@ -0,0 +1,96 @@
+using System.Net.Http.Headers;
+using System.Net.Http.Json;
+using System.Text.Json.Serialization;
+using LibMatrix.Extensions;
+using LibMatrix.Responses;
+using Microsoft.Extensions.Logging;
+
+namespace LibMatrix.Services;
+
+public class HomeserverProviderService {
+    private readonly TieredStorageService _tieredStorageService;
+    private readonly ILogger<HomeserverProviderService> _logger;
+    private readonly HomeserverResolverService _homeserverResolverService;
+
+    public HomeserverProviderService(TieredStorageService tieredStorageService,
+        ILogger<HomeserverProviderService> logger, HomeserverResolverService homeserverResolverService) {
+        Console.WriteLine("Homeserver provider service instantiated!");
+        _tieredStorageService = tieredStorageService;
+        _logger = logger;
+        _homeserverResolverService = homeserverResolverService;
+        logger.LogDebug(
+            $"New HomeserverProviderService created with TieredStorageService<{string.Join(", ", tieredStorageService.GetType().GetProperties().Select(x => x.Name))}>!");
+    }
+
+    private static Dictionary<string, SemaphoreSlim> _authenticatedHomeserverSemaphore = new();
+    private static Dictionary<string, AuthenticatedHomeServer> _authenticatedHomeServerCache = new();
+
+    public async Task<AuthenticatedHomeServer> GetAuthenticatedWithToken(string homeserver, string accessToken,
+        string? overrideFullDomain = null) {
+        SemaphoreSlim sem = _authenticatedHomeserverSemaphore.GetOrCreate(homeserver+accessToken, _ => new SemaphoreSlim(1, 1));
+        await sem.WaitAsync();
+        if (_authenticatedHomeServerCache.ContainsKey(homeserver+accessToken)) {
+            sem.Release();
+            return _authenticatedHomeServerCache[homeserver+accessToken];
+        }
+
+        var hs = new AuthenticatedHomeServer(_tieredStorageService, homeserver, accessToken);
+        hs.FullHomeServerDomain = overrideFullDomain ??
+                                  await _homeserverResolverService.ResolveHomeserverFromWellKnown(homeserver);
+        hs._httpClient.Dispose();
+        hs._httpClient = new MatrixHttpClient { BaseAddress = new Uri(hs.FullHomeServerDomain) };
+        hs._httpClient.Timeout = TimeSpan.FromSeconds(120);
+        hs._httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Bearer", accessToken);
+
+        hs.WhoAmI = (await hs._httpClient.GetFromJsonAsync<WhoAmIResponse>("/_matrix/client/v3/account/whoami"))!;
+
+        _authenticatedHomeServerCache[homeserver+accessToken] = hs;
+        sem.Release();
+
+        return hs;
+    }
+
+    public async Task<RemoteHomeServer> GetRemoteHomeserver(string homeserver, string? overrideFullDomain = null) {
+        var hs = new RemoteHomeServer(homeserver);
+        hs.FullHomeServerDomain = overrideFullDomain ??
+                                  await _homeserverResolverService.ResolveHomeserverFromWellKnown(homeserver);
+        hs._httpClient.Dispose();
+        hs._httpClient = new MatrixHttpClient { BaseAddress = new Uri(hs.FullHomeServerDomain) };
+        hs._httpClient.Timeout = TimeSpan.FromSeconds(120);
+        return hs;
+    }
+
+    public async Task<LoginResponse> Login(string homeserver, string user, string password,
+        string? overrideFullDomain = null) {
+        var hs = await GetRemoteHomeserver(homeserver, overrideFullDomain);
+        var payload = new LoginRequest {
+            Identifier = new() { User = user },
+            Password = password
+        };
+        var resp = await hs._httpClient.PostAsJsonAsync("/_matrix/client/v3/login", payload);
+        var data = await resp.Content.ReadFromJsonAsync<LoginResponse>();
+        return data!;
+    }
+
+    private class LoginRequest {
+        [JsonPropertyName("type")]
+        public string Type { get; set; } = "m.login.password";
+
+        [JsonPropertyName("identifier")]
+        public LoginIdentifier Identifier { get; set; } = new();
+
+        [JsonPropertyName("password")]
+        public string Password { get; set; } = "";
+
+        [JsonPropertyName("initial_device_display_name")]
+        public string InitialDeviceDisplayName { get; set; } = "Rory&::LibMatrix";
+
+        public class LoginIdentifier {
+            [JsonPropertyName("type")]
+            public string Type { get; set; } = "m.id.user";
+
+            [JsonPropertyName("user")]
+            public string User { get; set; } = "";
+        }
+    }
+}
diff --git a/LibMatrix/Services/HomeserverResolverService.cs b/LibMatrix/Services/HomeserverResolverService.cs
new file mode 100644
index 0000000..4d3bc46
--- /dev/null
+++ b/LibMatrix/Services/HomeserverResolverService.cs
@@ -0,0 +1,86 @@
+using System.Text.Json;
+using LibMatrix.Extensions;
+using Microsoft.Extensions.Logging;
+
+namespace LibMatrix.Services;
+
+public class HomeserverResolverService {
+    private readonly MatrixHttpClient _httpClient = new();
+    private readonly ILogger<HomeserverResolverService> _logger;
+
+    private static readonly Dictionary<string, string> _wellKnownCache = new();
+    private static readonly Dictionary<string, SemaphoreSlim> _wellKnownSemaphores = new();
+
+    public HomeserverResolverService(ILogger<HomeserverResolverService> logger) {
+        _logger = logger;
+    }
+
+    public async Task<string> ResolveHomeserverFromWellKnown(string homeserver) {
+        var res = await _resolveHomeserverFromWellKnown(homeserver);
+        if (!res.StartsWith("http")) res = "https://" + res;
+        if (res.EndsWith(":443")) res = res.Substring(0, res.Length - 4);
+        return res;
+    }
+
+    private async Task<string> _resolveHomeserverFromWellKnown(string homeserver) {
+        if (homeserver is null) throw new ArgumentNullException(nameof(homeserver));
+        SemaphoreSlim sem = _wellKnownSemaphores.GetOrCreate(homeserver, _ => new SemaphoreSlim(1, 1));
+        await sem.WaitAsync();
+        if (_wellKnownCache.ContainsKey(homeserver)) {
+            sem.Release();
+            return _wellKnownCache[homeserver];
+        }
+
+        string? result = null;
+        _logger.LogInformation($"Attempting to resolve homeserver: {homeserver}");
+        result ??= await _tryResolveFromClientWellknown(homeserver);
+        result ??= await _tryResolveFromServerWellknown(homeserver);
+        result ??= await _tryCheckIfDomainHasHomeserver(homeserver);
+
+        if (result is not null) {
+            _logger.LogInformation($"Resolved homeserver: {homeserver} -> {result}");
+            _wellKnownCache[homeserver] = result;
+            sem.Release();
+            return result;
+        }
+
+        throw new InvalidDataException($"Failed to resolve homeserver for {homeserver}! Is it online and configured correctly?");
+    }
+
+    private async Task<string?> _tryResolveFromClientWellknown(string homeserver) {
+        if (!homeserver.StartsWith("http")) homeserver = "https://" + homeserver;
+        if (await _httpClient.CheckSuccessStatus($"{homeserver}/.well-known/matrix/client")) {
+            var resp = await _httpClient.GetFromJsonAsync<JsonElement>($"{homeserver}/.well-known/matrix/client");
+            var hs = resp.GetProperty("m.homeserver").GetProperty("base_url").GetString();
+            return hs;
+        }
+
+        _logger.LogInformation("No client well-known...");
+        return null;
+    }
+
+    private async Task<string?> _tryResolveFromServerWellknown(string homeserver) {
+        if (!homeserver.StartsWith("http")) homeserver = "https://" + homeserver;
+        if (await _httpClient.CheckSuccessStatus($"{homeserver}/.well-known/matrix/server")) {
+            var resp = await _httpClient.GetFromJsonAsync<JsonElement>($"{homeserver}/.well-known/matrix/server");
+            var hs = resp.GetProperty("m.server").GetString();
+            return hs;
+        }
+
+        _logger.LogInformation("No server well-known...");
+        return null;
+    }
+
+    private async Task<string?> _tryCheckIfDomainHasHomeserver(string homeserver) {
+        _logger.LogInformation($"Checking if {homeserver} hosts a homeserver...");
+        if (await _httpClient.CheckSuccessStatus($"{homeserver}/_matrix/client/versions"))
+            return homeserver;
+        _logger.LogInformation("No homeserver on shortname...");
+        return null;
+    }
+
+    private async Task<string?> _tryCheckIfSubDomainHasHomeserver(string homeserver, string subdomain) {
+        homeserver = homeserver.Replace("https://", $"https://{subdomain}.");
+        return await _tryCheckIfDomainHasHomeserver(homeserver);
+    }
+}
diff --git a/LibMatrix/Services/ServiceInstaller.cs b/LibMatrix/Services/ServiceInstaller.cs
new file mode 100644
index 0000000..96a1963
--- /dev/null
+++ b/LibMatrix/Services/ServiceInstaller.cs
@@ -0,0 +1,29 @@
+using Microsoft.Extensions.DependencyInjection;
+
+namespace LibMatrix.Services;
+
+public static class ServiceInstaller {
+
+    public static IServiceCollection AddRoryLibMatrixServices(this IServiceCollection services, RoryLibMatrixConfiguration? config = null) {
+        //Check required services
+        if (!services.Any(x => x.ServiceType == typeof(TieredStorageService)))
+            throw new Exception("[MRUCore/DI] No TieredStorageService has been registered!");
+        //Add config
+        if(config is not null)
+            services.AddSingleton(config);
+        else {
+            services.AddSingleton(new RoryLibMatrixConfiguration());
+        }
+        //Add services
+        services.AddSingleton<HomeserverProviderService>();
+        services.AddSingleton<HomeserverResolverService>();
+        // services.AddScoped<MatrixHttpClient>();
+        return services;
+    }
+
+
+}
+
+public class RoryLibMatrixConfiguration {
+    public string AppName { get; set; } = "Rory&::LibMatrix";
+}
diff --git a/LibMatrix/Services/TieredStorageService.cs b/LibMatrix/Services/TieredStorageService.cs
new file mode 100644
index 0000000..954a2ce
--- /dev/null
+++ b/LibMatrix/Services/TieredStorageService.cs
@@ -0,0 +1,13 @@
+using LibMatrix.Interfaces.Services;
+
+namespace LibMatrix.Services;
+
+public class TieredStorageService {
+    public IStorageProvider CacheStorageProvider { get; }
+    public IStorageProvider DataStorageProvider { get; }
+
+    public TieredStorageService(IStorageProvider cacheStorageProvider, IStorageProvider dataStorageProvider) {
+        CacheStorageProvider = cacheStorageProvider;
+        DataStorageProvider = dataStorageProvider;
+    }
+}