Enforced approval rights

PostFundManagement.Application/Abstractions/Services/IGrantsService.cs

@@ -1,4 +1,4 @@
-using PostFundManagement.Application.Services.Grants;
+using PostFundManagement.Application.Services.Grants;
 using PostFundManagement.Domain;
 using PostFundManagement.Domain.Attributes;
 using PostFundManagement.Domain.Models;
@@ -45,6 +45,10 @@ public interface IGrantsService
     [Audit]
     Task<Result> CreateAwardAsync(CreateAwardRequest request, Guid userId, CancellationToken cancellationToken = default);
 
+    [Log]
+    [Audit]
+    Task<Result> UpdateAwardAsync(UpdateAwardRequest request, Guid userId, CancellationToken cancellationToken = default);
+
     [Log]
     [Audit]
     Task<Result<string>> GetContractUrlAsync(string contractIdHash, CancellationToken cancellationToken = default);

PostFundManagement.Application/Services/Grants/GrantsCacheService.cs

@@ -12,6 +12,9 @@ public sealed class GrantsCacheService(GrantsService service, IDistributedCache
     public async Task<Result> CreateAwardAsync(CreateAwardRequest request, Guid userId, CancellationToken cancellationToken = default) =>
         await service.CreateAwardAsync(request, userId, cancellationToken);
 
+    public async Task<Result> UpdateAwardAsync(UpdateAwardRequest request, Guid userId, CancellationToken cancellationToken = default) =>
+        await service.UpdateAwardAsync(request, userId, cancellationToken);
+
     public async Task<Result> CreateBudgetAsync(CreateBudgetRequest request, Guid userId, CancellationToken cancellationToken = default) =>
         await service.CreateBudgetAsync(request, userId, cancellationToken);
 

PostFundManagement.Application/Services/Grants/GrantsService.cs

@@ -206,6 +206,44 @@ public sealed class GrantsService(IDbContextFactory<ApplicationDbContext> contex
             return Result.OkIf(await context.SaveChangesAsync(cancellationToken) > 0, CreateError.Create("Failed to create award"));
         }));
 
+    public async Task<Result> UpdateAwardAsync(UpdateAwardRequest request, Guid userId, CancellationToken cancellationToken = default) =>
+        await Result.Try((Func<Task<Result>>)(async () =>
+        {
+            if (request.Amount <= 0)
+                return Result.Fail(ValidationError.Create("Approved amount must be greater than zero."));
+
+            await using var context = await contextFactory.CreateDbContextAsync(cancellationToken);
+
+            var existingAward = await context.Awards.FirstOrDefaultAsync(a => a.Id == request.AwardId, cancellationToken);
+            if (existingAward is null)
+                return Result.Fail(NotFoundError.Create("Award not found"));
+
+            if (existingAward.Status == ApprovalStatus.Approved)
+                return Result.Fail(ValidationError.Create("Approved awards are immutable and cannot be updated."));
+
+            if (!await context.Organisations.AnyAsync(o => o.Id == request.OrganisationId, cancellationToken))
+                return Result.Fail(NotFoundError.Create("Organisation not found"));
+
+            if (!await context.Programmes.AnyAsync(p => p.Id == request.ProgrammeId, cancellationToken))
+                return Result.Fail(NotFoundError.Create("Programme not found"));
+
+            existingAward.OrganisationId = request.OrganisationId;
+            existingAward.ProgrammeId = request.ProgrammeId;
+            existingAward.Amount = request.Amount;
+            if (request.Status.HasValue)
+            {
+                existingAward.Status = request.Status.Value;
+                if (request.Status.Value == ApprovalStatus.Approved)
+                {
+                    existingAward.ApprovedBy = userId;
+                }
+            }
+            existingAward.UpdatedBy = userId;
+            existingAward.UpdatedAt = DateTime.UtcNow;
+
+            return Result.OkIf(await context.SaveChangesAsync(cancellationToken) > 0, UpdateError.Create("Failed to update award"));
+        }));
+
     public async Task<Result<string>> GetContractUrlAsync(string contractIdHash, CancellationToken cancellationToken = default) =>
         await Result.Try((Func<Task<Result<string>>>)(async () =>
         {

PostFundManagement.Application/Services/Grants/Records.cs

@@ -1,4 +1,4 @@
-using PostFundManagement.Domain;
+using PostFundManagement.Domain;
 
 namespace PostFundManagement.Application.Services.Grants;
 
@@ -8,6 +8,8 @@ public sealed record UpdateContractRequest([Required] long ContractId, [Required
 
 public sealed record CreateAwardRequest([Required] long OrganisationId, [Required] long ProgrammeId, [Required] decimal Amount);
 
+public sealed record UpdateAwardRequest([Required] long AwardId, [Required] long OrganisationId, [Required] long ProgrammeId, [Required] decimal Amount, ApprovalStatus? Status);
+
 public sealed record CreateBudgetRequest([Required] long ProjectId, 
     [Required][MaxLength(LabelLength)] string Name, 
     [Required] decimal Amount);