fix(hydra): server-side validation errors (#613)

Author: slax57

src/hydra/fetchHydra.test.ts

@@ -55,6 +55,32 @@ test.each([
         'At least one product must be selected if policy is restricted.',
     },
   ],
+  [
+    'problem+json',
+    {
+      '@context': '/contexts/ConstraintViolation',
+      '@id': '/validation_errors/2881c032-660f-46b6-8153-d352d9706640',
+      '@type': 'ConstraintViolation',
+      status: 422,
+      violations: [
+        {
+          propertyPath: 'isbn',
+          'ConstraintViolation/message':
+            'This value is neither a valid ISBN-10 nor a valid ISBN-13.',
+          'ConstraintViolation/code': '2881c032-660f-46b6-8153-d352d9706640',
+        },
+      ],
+      detail:
+        'isbn: This value is neither a valid ISBN-10 nor a valid ISBN-13.',
+      description:
+        'isbn: This value is neither a valid ISBN-10 nor a valid ISBN-13.',
+      type: '/validation_errors/2881c032-660f-46b6-8153-d352d9706640',
+      title: 'An error occurred',
+    },
+    {
+      isbn: 'This value is neither a valid ISBN-10 nor a valid ISBN-13.',
+    },
+  ],
 ])(
   '%s violation list expanding',
   async (format: string, resBody: object, expected: object) => {

src/hydra/schemaAnalyzer.ts

@@ -68,6 +68,10 @@ const getFieldType = (field: Field) => {
   }
 };
 
+const getViolationMessage = (violation: JsonLdObj, base: string) =>
+  violation[`${base}#message`] ??
+  violation[`${base}#ConstraintViolation/message`];
+
 const getSubmissionErrors = (error: HttpError) => {
   if (!error.body?.[0]) {
     return null;
@@ -84,15 +88,16 @@ const getSubmissionErrors = (error: HttpError) => {
 
   const violations: SubmissionErrors = content[violationKey].reduce(
     (previousViolations: SubmissionErrors, violation: JsonLdObj) =>
-      !violation[`${base}#propertyPath`] || !violation[`${base}#message`]
+      !violation[`${base}#propertyPath`] ||
+      !getViolationMessage(violation, base)
         ? previousViolations
         : {
             ...previousViolations,
             [(violation[`${base}#propertyPath`] as JsonLdObj[])[0]?.[
               '@value'
-            ] as string]: (violation[`${base}#message`] as JsonLdObj[])[0]?.[
-              '@value'
-            ],
+            ] as string]: (
+              getViolationMessage(violation, base) as JsonLdObj[]
+            )[0]?.['@value'],
           },
     {},
   );