ANTOOZA-BACKEND/Web.Api/Endpoints/Auth/SocialAuthorizeUrl.cs

using Application.Abstractions.Messaging;
using Web.Api.Common;
using Web.Api.Extensions;

namespace Web.Api.Endpoints.Auth;

/// <summary>
/// 소셜 로그인 시작 URL 생성 (Naver/Kakao) — 프론트 start 라우트가 state 생성/쿠키 보관 후 호출.
/// redirectUri 미전달 시 AppSettings OAuth:{Provider}:RedirectUri 사용.
/// </summary>
internal sealed class SocialAuthorizeUrl : IEndpoint
{
    public void MapEndpoint(IEndpointRouteBuilder app)
    {
        app.MapGet("api/auth/{provider}/authorize-url", async (
            string provider,
            ISender sender,
            string? state = null,
            string? redirectUri = null,
            CancellationToken ct = default
        ) => {
            var query = new Application.Features.Api.Auth.SocialAuthorizeUrl.Query(
                provider,
                state ?? string.Empty,
                redirectUri
            );

            var result = await sender.Send(query, ct);

            return result.Match(
                data => ApiResponse.Ok(data),
                CustomResults.Problem
            );
        })
        .WithTags("Auth")
        .AllowAnonymous();
    }
}