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AMREZ.EOP.Application/UseCases/Tenancy/UpdateTenantUseCase.cs

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+using System.Data;
+using AMREZ.EOP.Abstractions.Applications.Tenancy;
+using AMREZ.EOP.Abstractions.Applications.UseCases.Tenancy;
+using AMREZ.EOP.Abstractions.Infrastructures.Common;
+using AMREZ.EOP.Abstractions.Infrastructures.Repositories;
+using AMREZ.EOP.Contracts.DTOs.Tenancy.UpdateTenant;
+using Microsoft.AspNetCore.Http;
+
+namespace AMREZ.EOP.Application.UseCases.Tenancy;
+
+public sealed class UpdateTenantUseCase : IUpdateTenantUseCase
+{
+    private readonly ITenantResolver _resolver;
+    private readonly IHttpContextAccessor _http;
+    private readonly IUnitOfWork _uow;
+    private readonly ITenantRepository _repo;
+
+    public UpdateTenantUseCase(ITenantResolver resolver, IHttpContextAccessor http, IUnitOfWork uow, ITenantRepository repo)
+    { _resolver = resolver; _http = http; _uow = uow; _repo = repo; }
+
+    public async Task<UpdateTenantResponse?> ExecuteAsync(UpdateTenantRequest request, CancellationToken ct = default)
+    {
+        var http = _http.HttpContext ?? throw new InvalidOperationException("No HttpContext");
+
+        var key = (request?.TenantKey ?? string.Empty).Trim().ToLowerInvariant();
+        if (string.IsNullOrWhiteSpace(key)) return null;
+
+        var ctx = _resolver.Resolve(http, hint: null);
+        if (ctx is null) return null;
+
+        await _uow.BeginAsync(ctx, IsolationLevel.ReadCommitted, ct);
+        try
+        {
+            var current = await _repo.GetAsync(key, ct);
+            if (current is null) { await _uow.RollbackAsync(ct); return null; } // 404
+
+            if (request!.IfUnmodifiedSince.HasValue && current.UpdatedAtUtc > request.IfUnmodifiedSince.Value)
+            { await _uow.RollbackAsync(ct); return null; } // 412
+
+            current.Schema = request.Schema is null ? current.Schema : (string.IsNullOrWhiteSpace(request.Schema) ? null : request.Schema.Trim());
+            current.ConnectionString = request.ConnectionString is null ? current.ConnectionString : (string.IsNullOrWhiteSpace(request.ConnectionString) ? null : request.ConnectionString.Trim());
+            if (request.Mode.HasValue) current.Mode = request.Mode.Value;
+            if (request.IsActive.HasValue) current.IsActive = request.IsActive.Value;
+            current.UpdatedAtUtc = DateTimeOffset.UtcNow;
+
+            var ok = await _repo.UpdateAsync(current, request.IfUnmodifiedSince, ct);
+            if (!ok) { await _uow.RollbackAsync(ct); return null; }
+
+            await _uow.CommitAsync(ct);
+            return new UpdateTenantResponse(current.TenantKey, current.UpdatedAtUtc);
+        }
+        catch
+        {
+            await _uow.RollbackAsync(ct);
+            throw;
+        }
+    }
+}