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internal/ucp/customer.go

@@ -19,6 +19,7 @@ type CustomerServer struct {
 	applier      ProfileApplier
 	deleter      CredentialDeleter
 	auditLogPath string
+	emailIndex   *profile.ProfileEmailIndex // optional, maintained by mutations
 }
 
 // NewCustomerServer builds a UCP REST adapter over a profile grain pool.
@@ -30,6 +31,33 @@ func NewCustomerServer(applier ProfileApplier, auditLogPath string, deleter ...C
 	return &CustomerServer{applier: applier, deleter: del, auditLogPath: auditLogPath}
 }
 
+// SetEmailIndex attaches a ProfileEmailIndex that is updated by every
+// customer mutation (create, update, delete).
+func (s *CustomerServer) SetEmailIndex(ix *profile.ProfileEmailIndex) {
+	s.emailIndex = ix
+}
+
+// indexProfileAfterMutation reads the grain and updates the email index.
+func (s *CustomerServer) indexProfileAfterMutation(ctx context.Context, id uint64) {
+	if s.emailIndex == nil {
+		return
+	}
+	g, err := s.applier.Get(ctx, id)
+	if err != nil {
+		return
+	}
+	prefs := g.EmailPreferences
+	// Copy so the index holds its own snapshot (the grain is pooled).
+	if prefs != nil {
+		cp := &profile.EmailPreferences{
+			OrderEmails:     prefs.OrderEmails,
+			MarketingEmails: prefs.MarketingEmails,
+		}
+		prefs = cp
+	}
+	s.emailIndex.Set(id, g.Email, prefs)
+}
+
 // ---------------------------------------------------------------------------
 // UCP Customer endpoints
 // ---------------------------------------------------------------------------
@@ -61,6 +89,11 @@ func (s *CustomerServer) handleCreateCustomer(w http.ResponseWriter, r *http.Req
 		AvatarUrl: req.AvatarUrl,
 	}
 
+	if req.EmailPreferences != nil {
+		msg.OrderEmails = req.EmailPreferences.OrderEmails
+		msg.MarketingEmails = req.EmailPreferences.MarketingEmails
+	}
+
 	if _, err := s.applier.Apply(r.Context(), id, msg); err != nil {
 		writeError(w, http.StatusInternalServerError, "failed to create customer: "+err.Error())
 		return
@@ -72,6 +105,8 @@ func (s *CustomerServer) handleCreateCustomer(w http.ResponseWriter, r *http.Req
 		return
 	}
 
+	s.indexProfileAfterMutation(r.Context(), id)
+
 	writeJSON(w, http.StatusCreated, customerGrainToResponse(rawId.String(), g))
 }
 
@@ -132,6 +167,11 @@ func (s *CustomerServer) handleUpdateCustomer(w http.ResponseWriter, r *http.Req
 		AvatarUrl: req.AvatarUrl,
 	}
 
+	if req.EmailPreferences != nil {
+		msg.OrderEmails = req.EmailPreferences.OrderEmails
+		msg.MarketingEmails = req.EmailPreferences.MarketingEmails
+	}
+
 	if _, err := s.applier.Apply(r.Context(), id, msg); err != nil {
 		writeError(w, http.StatusInternalServerError, "failed to update customer: "+err.Error())
 		return
@@ -143,9 +183,36 @@ func (s *CustomerServer) handleUpdateCustomer(w http.ResponseWriter, r *http.Req
 		return
 	}
 
+	s.indexProfileAfterMutation(r.Context(), id)
+
 	writeJSON(w, http.StatusOK, customerGrainToResponse(r.PathValue("id"), g))
 }
 
+// handleGetCustomerByEmail handles GET /customers/by-email/{email} — looks up
+// the customer profile from the email index and returns the customer response.
+// Returns 404 when the email is not found.
+func (s *CustomerServer) handleGetCustomerByEmail(w http.ResponseWriter, r *http.Request) {
+	email := r.PathValue("email")
+	if email == "" || s.emailIndex == nil {
+		writeError(w, http.StatusNotFound, "customer not found")
+		return
+	}
+
+	entry, ok := s.emailIndex.Lookup(email)
+	if !ok {
+		writeError(w, http.StatusNotFound, "customer not found")
+		return
+	}
+
+	g, err := s.applier.Get(r.Context(), entry.ID)
+	if err != nil {
+		writeError(w, http.StatusNotFound, "customer not found")
+		return
+	}
+
+	writeJSON(w, http.StatusOK, customerGrainToResponse(profile.ProfileId(entry.ID).String(), g))
+}
+
 // handleAddAddress handles POST /customers/{id}/addresses.
 func (s *CustomerServer) handleAddAddress(w http.ResponseWriter, r *http.Request) {
 	id, ok := parseCustomerID(r)
@@ -477,5 +544,13 @@ func customerGrainToResponse(id string, g *profile.ProfileGrain) CustomerRespons
 		})
 	}
 
+	if g.EmailPreferences != nil {
+		prefs := &EmailPreferencesResponse{
+			OrderEmails:     g.EmailPreferences.OrderEmails,
+			MarketingEmails: g.EmailPreferences.MarketingEmails,
+		}
+		resp.EmailPreferences = prefs
+	}
+
 	return resp
 }