Add fallback for tax archive canonical url

Author: ravewebdev

api/wordpress/_global/getPostTypeTaxonomyArchive.js

@@ -102,6 +102,17 @@ export default async function getPostTypeTaxonomyArchive(
       // Flatten posts array to include inner node post data.
       response.posts = posts.map((post) => post.node)
 
+      // Use final breadcrumb as alternative canonical URL.
+      const breadcrumb =
+        archiveSeo?.breadcrumbs &&
+        archiveSeo.breadcrumbs.length > 0 &&
+        archiveSeo.breadcrumbs.slice(-1)[0]?.url
+
+      // Manually create fallback taxonomy canonical URL.
+      const fallback = `${response.defaultSeo?.openGraph?.url ?? ''}/${
+        postTypes?.[postType]?.route
+      }/${taxonomy}/${taxonomyId}`
+
       // Structure archive SEO.
       response.post = {
         seo: {
@@ -110,11 +121,7 @@ export default async function getPostTypeTaxonomyArchive(
             archiveSeo?.title ??
             `${taxonomyId} - ${response.defaultSeo?.openGraph?.siteName ?? ''}`,
           metaDesc: archiveSeo?.metaDesc ?? '',
-          canonical:
-            archiveSeo?.canonical ??
-            `${response.defaultSeo?.openGraph?.url ?? ''}/${
-              postTypes?.[postType]?.route
-            }/${taxonomy}/${taxonomyId}`,
+          canonical: archiveSeo?.canonical ?? breadcrumb ?? fallback,
           metaRobotsNofollow: archiveSeo?.metaRobotsNofollow ?? 'follow',
           metaRobotsNoindex: archiveSeo?.metaRobotsNoindex ?? 'index'
         }