Project Init

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Co-Authored-By: Claude <noreply@anthropic.com>

colaflow-api/src/Modules/ProjectManagement/ColaFlow.Modules.ProjectManagement.Application/Behaviors/ValidationBehavior.cs

@@ -0,0 +1,46 @@
+using FluentValidation;
+using MediatR;
+
+namespace ColaFlow.Modules.ProjectManagement.Application.Behaviors;
+
+/// <summary>
+/// Pipeline behavior for request validation using FluentValidation
+/// </summary>
+public sealed class ValidationBehavior<TRequest, TResponse> : IPipelineBehavior<TRequest, TResponse>
+    where TRequest : IRequest<TResponse>
+{
+    private readonly IEnumerable<IValidator<TRequest>> _validators;
+
+    public ValidationBehavior(IEnumerable<IValidator<TRequest>> validators)
+    {
+        _validators = validators;
+    }
+
+    public async Task<TResponse> Handle(
+        TRequest request,
+        RequestHandlerDelegate<TResponse> next,
+        CancellationToken cancellationToken)
+    {
+        if (!_validators.Any())
+        {
+            return await next();
+        }
+
+        var context = new ValidationContext<TRequest>(request);
+
+        var validationResults = await Task.WhenAll(
+            _validators.Select(v => v.ValidateAsync(context, cancellationToken)));
+
+        var failures = validationResults
+            .SelectMany(r => r.Errors)
+            .Where(f => f != null)
+            .ToList();
+
+        if (failures.Any())
+        {
+            throw new ValidationException(failures);
+        }
+
+        return await next();
+    }
+}