feat: add available providers list

ApiDto/Common/OAuthProvider.cs

@@ -0,0 +1,22 @@
+namespace Mirea.Api.Dto.Common;
+
+/// <summary>
+/// Represents different OAuth providers for authentication.
+/// </summary>
+public enum OAuthProvider
+{
+    /// <summary>
+    /// OAuth provider for Google.
+    /// </summary>
+    Google,
+
+    /// <summary>
+    /// OAuth provider for Yandex.
+    /// </summary>
+    Yandex,
+
+    /// <summary>
+    /// OAuth provider for Mail.ru.
+    /// </summary>
+    MailRu
+}

ApiDto/Responses/AvailableProvidersResponse.cs

@@ -0,0 +1,25 @@
+using Mirea.Api.Dto.Common;
+using System;
+
+namespace Mirea.Api.Dto.Responses;
+
+/// <summary>
+/// Represents the response containing information about available OAuth providers.
+/// </summary>
+public class AvailableProvidersResponse
+{
+    /// <summary>
+    /// Gets or sets the name of the OAuth provider.
+    /// </summary>
+    public required string ProviderName { get; set; }
+
+    /// <summary>
+    /// Gets or sets the enum value representing the OAuth provider.
+    /// </summary>
+    public OAuthProvider Provider { get; set; }
+
+    /// <summary>
+    /// Gets or sets the redirect URI for the OAuth provider.
+    /// </summary>
+    public required Uri Redirect { get; set; }
+}

Endpoint/Common/MapperDto/AvailableProvidersConverter.cs

@@ -0,0 +1,27 @@
+using Mirea.Api.Dto.Responses;
+using Mirea.Api.Security.Common.Domain;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace Mirea.Api.Endpoint.Common.MapperDto;
+
+public static class AvailableProvidersConverter
+{
+    public static Dto.Common.OAuthProvider ConvertToDto(this OAuthProvider provider) =>
+        provider switch
+        {
+            OAuthProvider.Google => Dto.Common.OAuthProvider.Google,
+            OAuthProvider.Yandex => Dto.Common.OAuthProvider.Yandex,
+            OAuthProvider.MailRu => Dto.Common.OAuthProvider.MailRu,
+            _ => throw new ArgumentOutOfRangeException(nameof(provider), provider, null)
+        };
+
+    public static List<AvailableProvidersResponse> ConvertToDto(this (OAuthProvider Provider, Uri Redirect)[] data) =>
+        data.Select(x => new AvailableProvidersResponse()
+        {
+            ProviderName = Enum.GetName(x.Provider)!,
+            Provider = x.Provider.ConvertToDto(),
+            Redirect = x.Redirect
+        }).ToList();
+}

Endpoint/Controllers/V1/AuthController.cs

@@ -5,6 +5,7 @@ using Microsoft.AspNetCore.Mvc;
 using Microsoft.Extensions.Options;
 using Mirea.Api.Dto.Common;
 using Mirea.Api.Dto.Requests;
+using Mirea.Api.Dto.Responses;
 using Mirea.Api.Endpoint.Common.Attributes;
 using Mirea.Api.Endpoint.Common.Exceptions;
 using Mirea.Api.Endpoint.Common.MapperDto;
@@ -28,6 +29,12 @@ public class AuthController(IOptionsSnapshot<Admin> user, AuthService auth, Pass
             Path = UrlHelper.GetSubPathWithoutFirstApiName + "api"
         };
 
+    [HttpGet("GetAvailableProviders")]
+    public ActionResult<List<AvailableProvidersResponse>> GetUrls() =>
+        Ok(oAuthService
+            .GetAvailableProviders(HttpContext, GetCookieParams(), HttpContext.GetApiUrl(Url.Action("OAuth2")!))
+            .ConvertToDto());
+
     [HttpPost("Login")]
     [BadRequestResponse]
     public async Task<ActionResult<TwoFactorAuthentication>> Login([FromBody] LoginRequest request)