fix(pages,services): make thematics & topics pages usable again

When I refactored the fetchers and convertors in #f111685 I forgot to
convert WPThematicPreview and WPTopicPreview so the thematics and
topics pages was broken.
I also:
* removed the ToC added by error in #70b4f63
* fix heading styles
* fix website url in topics pages

1 files changed, 56 insertions, 0 deletions

diff --git a/src/services/graphql/helpers/convert-wp-topic-to-topic.ts b/src/services/graphql/helpers/convert-wp-topic-to-topic.ts
new file mode 100644
index 0000000..b0136c7
--- /dev/null
+++ b/src/services/graphql/helpers/convert-wp-topic-to-topic.ts
@@ -0,0 +1,56 @@
+import type { PageLink, Topic, WPPostPreview, WPTopic } from '../../../types';
+import { ROUTES } from '../../../utils/constants';
+import {
+  getUniquePageLinks,
+  sortPageLinksByName,
+} from '../../../utils/helpers';
+import { convertPostPreviewToArticlePreview } from './convert-post-preview-to-article-preview';
+import { convertWPThematicPreviewToPageLink } from './convert-taxonomy-to-page-link';
+import { convertWPImgToImg } from './convert-wp-image-to-img';
+
+const getRelatedThematicsFrom = (posts: WPPostPreview[]): PageLink[] => {
+  const thematics: PageLink[] = [];
+
+  for (const post of posts) {
+    if (
+      post.acfPosts &&
+      'postsInThematic' in post.acfPosts &&
+      post.acfPosts.postsInThematic
+    ) {
+      thematics.push(
+        ...post.acfPosts.postsInThematic.map(convertWPThematicPreviewToPageLink)
+      );
+    }
+  }
+
+  return getUniquePageLinks(thematics).sort(sortPageLinksByName);
+};
+
+export const convertWPTopicToTopic = (topic: WPTopic): Topic => {
+  return {
+    content: topic.contentParts.afterMore,
+    intro: topic.contentParts.beforeMore,
+    meta: {
+      articles: topic.acfTopics?.postsInTopic?.map(
+        convertPostPreviewToArticlePreview
+      ),
+      cover: topic.featuredImage
+        ? convertWPImgToImg(topic.featuredImage.node)
+        : undefined,
+      dates: {
+        publication: topic.date,
+        update: topic.modified,
+      },
+      seo: {
+        description: topic.seo.metaDesc,
+        title: topic.seo.title,
+      },
+      relatedThematics: topic.acfTopics?.postsInTopic
+        ? getRelatedThematicsFrom(topic.acfTopics.postsInTopic)
+        : undefined,
+      website: topic.acfTopics?.officialWebsite ?? undefined,
+    },
+    slug: `${ROUTES.TOPICS}/${topic.slug}`,
+    title: topic.title,
+  };
+};