Workstream H: Implement VS-03 Approval Workflow (Maker-Checker governance)

- 3 API endpoints: POST /approvals, GET /approvals, POST /approvals/{id}/approve - State machine: DRAFT → PROPOSED → APPROVED → ACTIVE - RBAC enforcement: Maker ≠ Checker separation of duties - Evidence linkage: PBO/DSR/OOS artifact URLs stored - Schema: Append-only events with correlation_id - Tests: 5+ unit/integration scenarios - Documentation: Full API contracts + compliance procedures - AGENTS.md v16.0 13/13 compliance ✅ Closes workstream H (Phase 2 implementation). Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
2026-08-07 16:38:14 +09:00
parent 2b2841671c
commit a2e742c78d
8 changed files with 1327 additions and 0 deletions
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+namespace KArtSell.Modules.ModelOperations.ApprovalWorkflow;
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+public class ApprovalPolicy
+{
+    private readonly IClock _clock;
+
+    public ApprovalPolicy(IClock clock)
+    {
+        _clock = clock;
+    }
+
+    public bool CanCreateProposal(string userEmail, string? userRole)
+    {
+        return userRole is "Maker" or "Admin";
+    }
+
+    public bool CanProposeApproval(ApprovalProposal proposal, string userEmail)
+    {
+        if (proposal.Status != ApprovalStatus.Draft)
+            return false;
+
+        return proposal.CreatedBy == userEmail;
+    }
+
+    public bool CanApproveApproval(ApprovalProposal proposal, string checkerEmail, string makerEmail)
+    {
+        if (proposal.Status != ApprovalStatus.Proposed)
+            return false;
+
+        if (checkerEmail == makerEmail)
+            return false; // Separation of duties: Maker cannot approve own proposal
+
+        return true;
+    }
+
+    public bool CanActivateApproval(ApprovalProposal proposal, string userRole)
+    {
+        if (proposal.Status != ApprovalStatus.Approved)
+            return false;
+
+        return userRole is "SRE" or "Admin";
+    }
+
+    public ApprovalProposal CreateProposal(
+        Guid modelId,
+        string createdBy,
+        string justification,
+        DateOnly effectiveAt)
+    {
+        return new ApprovalProposal
+        {
+            Id = Guid.NewGuid(),
+            ModelId = modelId,
+            Status = ApprovalStatus.Draft,
+            CreatedBy = createdBy,
+            CreatedAt = _clock.Now,
+            Justification = justification,
+            EffectiveAt = effectiveAt,
+            PublishedAt = _clock.Now,
+            Revision = 1,
+            CorrelationId = Guid.NewGuid()
+        };
+    }
+
+    public ApprovalProposal ProposeApproval(ApprovalProposal proposal, string makerEmail)
+    {
+        if (!CanProposeApproval(proposal, makerEmail))
+            throw new InvalidOperationException("Only the creator can propose their own approval");
+
+        proposal.Status = ApprovalStatus.Proposed;
+        proposal.ProposedAt = _clock.Now;
+        proposal.Revision++;
+        proposal.PublishedAt = _clock.Now;
+
+        return proposal;
+    }
+
+    public ApprovalProposal ApproveApproval(
+        ApprovalProposal proposal,
+        string checkerEmail,
+        string approvalNotes,
+        List<EvidenceItem> evidence)
+    {
+        if (!CanApproveApproval(proposal, checkerEmail, proposal.CreatedBy))
+            throw new InvalidOperationException("Checker cannot approve their own proposals");
+
+        proposal.Status = ApprovalStatus.Approved;
+        proposal.ApprovedBy = checkerEmail;
+        proposal.ApprovedAt = _clock.Now;
+        proposal.ApprovalNotes = approvalNotes;
+        proposal.Revision++;
+        proposal.PublishedAt = _clock.Now;
+
+        // Add evidence
+        foreach (var evt in evidence)
+        {
+            proposal.Evidence.Add(new ApprovalEvidence
+            {
+                Id = Guid.NewGuid(),
+                ApprovalProposalId = proposal.Id,
+                EvidenceType = evt.Type,
+                EvidenceUrl = evt.Url,
+                ReviewerComment = evt.Comment,
+                PublishedAt = _clock.Now,
+                CorrelationId = proposal.CorrelationId
+            });
+        }
+
+        return proposal;
+    }
+
+    public ApprovalProposal ActivateApproval(ApprovalProposal proposal, string sreEmail)
+    {
+        if (!CanActivateApproval(proposal, "SRE"))
+            throw new InvalidOperationException("Only SRE can activate approved proposals");
+
+        proposal.Status = ApprovalStatus.Active;
+        proposal.ActivatedBy = sreEmail;
+        proposal.ActivatedAt = _clock.Now;
+        proposal.Revision++;
+        proposal.PublishedAt = _clock.Now;
+
+        return proposal;
+    }
+
+    public ApprovalProposal RejectApproval(ApprovalProposal proposal, string checkerEmail, string rejectionReason)
+    {
+        if (proposal.Status != ApprovalStatus.Proposed)
+            throw new InvalidOperationException("Only proposed approvals can be rejected");
+
+        proposal.Status = ApprovalStatus.Rejected;
+        proposal.ApprovalNotes = $"Rejected: {rejectionReason}";
+        proposal.Revision++;
+        proposal.PublishedAt = _clock.Now;
+
+        return proposal;
+    }
+
+    public ApprovalEvent CreateProposalEvent(
+        ApprovalProposal proposal,
+        string eventType,
+        string actorEmail,
+        Dictionary<string, object>? details = null)
+    {
+        return new ApprovalEvent
+        {
+            Id = Guid.NewGuid(),
+            ApprovalProposalId = proposal.Id,
+            EventType = eventType,
+            ActorEmail = actorEmail,
+            EventAt = _clock.Now,
+            Details = details,
+            PublishedAt = _clock.Now,
+            CorrelationId = proposal.CorrelationId
+        };
+    }
+}
+
+public interface IClock
+{
+    DateTimeOffset Now { get; }
+}
+
+public class SystemClock : IClock
+{
+    public DateTimeOffset Now => DateTimeOffset.UtcNow;
+}