From d9dbf394b742f706f3726b2bc610f1ede97fe044 Mon Sep 17 00:00:00 2001
From: Salim Terres <salim.terres.ext@culture.gouv.fr>
Date: Tue, 8 Sep 2026 10:52:48 +0200
Subject: [PATCH] Bug #16825: [Chain audit] 404 error when downloading the
 report of a failed chaining audit.

---
 .../audit-preview.component.spec.ts           | 20 +++++++++++++++++++
 .../audit-preview/audit-preview.component.ts  |  9 +++++++--
 .../logbook-download.service.ts               |  4 ++++
 3 files changed, 31 insertions(+), 2 deletions(-)

diff --git a/ui/ui-frontend/projects/referential/src/app/audit/audit-preview/audit-preview.component.spec.ts b/ui/ui-frontend/projects/referential/src/app/audit/audit-preview/audit-preview.component.spec.ts
index c5e26088dfe..f7f1f7de9d6 100644
--- a/ui/ui-frontend/projects/referential/src/app/audit/audit-preview/audit-preview.component.spec.ts
+++ b/ui/ui-frontend/projects/referential/src/app/audit/audit-preview/audit-preview.component.spec.ts
@@ -91,4 +91,24 @@ describe('AuditPreviewComponent', () => {
   it('should create', () => {
     expect(component).toBeTruthy();
   });
+
+  it('should report no report for a chain audit without a successful reporting sub-event', () => {
+    fixture.componentRef.setInput('audit', {
+      type: 'TRACEABILITY_CHAIN_AUDIT',
+      events: [{ type: 'STP_PREPARE_TRACEABILITY_CHAIN_AUDIT', outcome: 'KO', outDetail: 'STP_PREPARE_TRACEABILITY_CHAIN_AUDIT.KO' }],
+    });
+    fixture.detectChanges();
+
+    expect(component.hasReport()).toBe(false);
+  });
+
+  it('should report a report for a chain audit with a successful reporting sub-event, even when the audit is KO', () => {
+    fixture.componentRef.setInput('audit', {
+      type: 'TRACEABILITY_CHAIN_AUDIT',
+      events: [{ type: 'TRACEABILITY_CHAIN_AUDIT_REPORTING', outcome: 'OK', outDetail: 'TRACEABILITY_CHAIN_AUDIT_REPORTING.OK' }],
+    });
+    fixture.detectChanges();
+
+    expect(component.hasReport()).toBe(true);
+  });
 });
diff --git a/ui/ui-frontend/projects/referential/src/app/audit/audit-preview/audit-preview.component.ts b/ui/ui-frontend/projects/referential/src/app/audit/audit-preview/audit-preview.component.ts
index 3779ef96c4f..173e3ad6a8d 100644
--- a/ui/ui-frontend/projects/referential/src/app/audit/audit-preview/audit-preview.component.ts
+++ b/ui/ui-frontend/projects/referential/src/app/audit/audit-preview/audit-preview.component.ts
@@ -77,9 +77,14 @@ export class AuditPreviewComponent implements OnInit {
 
   accessContractId: string;
   hasReport: Signal<boolean> = computed(() => {
-    if (this.audit().type === 'EVIDENCE_AUDIT') {
+    const audit = this.audit();
+    if (audit.type === 'EVIDENCE_AUDIT') {
       // Evidence audit may not have a report if "data" has "No report generated" in it.
-      return !this.audit().events.some((e) => /No report generated/i.test(e.data));
+      return !audit.events.some((e) => /No report generated/i.test(e.data));
+    }
+    if (audit.type === AuditOperation.TRACEABILITY_CHAIN_AUDIT) {
+      // Chain audit report only exists once the reporting sub-step has completed successfully.
+      return audit.events.some((e) => /REPORTING$/i.test(e.type) && e.outcome === 'OK');
     }
     return true;
   });
diff --git a/ui/ui-frontend/projects/referential/src/app/logbook-operation/logbook-download.service.ts b/ui/ui-frontend/projects/referential/src/app/logbook-operation/logbook-download.service.ts
index 37a5d4c70c9..8b1de7f1cfb 100644
--- a/ui/ui-frontend/projects/referential/src/app/logbook-operation/logbook-download.service.ts
+++ b/ui/ui-frontend/projects/referential/src/app/logbook-operation/logbook-download.service.ts
@@ -239,6 +239,10 @@ export class LogbookDownloadService extends SearchService<IEvent> {
       // Evidence audit may not have a report if "data" has "No report generated" in it.
       return !event.events.some((e) => /No report generated/i.test(e.data));
     }
+    if (['TRACEABILITY_CHAIN_AUDIT'].includes(event.type)) {
+      // Chain audit report only exists once the reporting sub-step has completed successfully.
+      return event.events.some((e) => /REPORTING$/i.test(e.type) && e.outcome === 'OK');
+    }
     return true;
   }
 }