1 files changed, 99 insertions, 0 deletions
diff --git a/src/content/dependencies/generateGroupSecondaryNav.js b/src/content/dependencies/generateGroupSecondaryNav.js
new file mode 100644
index 0000000..e3b2809
--- /dev/null
+++ b/src/content/dependencies/generateGroupSecondaryNav.js
@@ -0,0 +1,99 @@
+export default {
+  contentDependencies: [
+    'generateColorStyleVariables',
+    'generatePreviousNextLinks',
+    'generateSecondaryNav',
+    'linkGroupDynamically',
+    'linkListing',
+  ],
+
+  extraDependencies: ['html', 'language', 'wikiData'],
+
+  sprawl: ({listingSpec, wikiInfo}) => ({
+    groupsByCategoryListing:
+      (wikiInfo.enableListings
+        ? listingSpec
+            .find(l => l.directory === 'groups/by-category')
+        : null),
+  }),
+
+  query(sprawl, group) {
+    const groups = group.category.groups;
+    const index = groups.indexOf(group);
+
+    return {
+      previousGroup:
+        (index > 0
+          ? groups[index - 1]
+          : null),
+
+      nextGroup:
+        (index < groups.length - 1
+          ? groups[index + 1]
+          : null),
+    };
+  },
+
+  relations(relation, query, sprawl, _group) {
+    const relations = {};
+
+    relations.secondaryNav =
+      relation('generateSecondaryNav');
+
+    if (sprawl.groupsByCategoryListing) {
+      relations.categoryLink =
+        relation('linkListing', sprawl.groupsByCategoryListing);
+    }
+
+    relations.colorVariables =
+      relation('generateColorStyleVariables');
+
+    if (query.previousGroup || query.nextGroup) {
+      relations.previousNextLinks =
+        relation('generatePreviousNextLinks');
+    }
+
+    relations.previousGroupLink =
+      (query.previousGroup
+        ? relation('linkGroupDynamically', query.previousGroup)
+        : null);
+
+    relations.nextGroupLink =
+      (query.nextGroup
+        ? relation('linkGroupDynamically', query.nextGroup)
+        : null);
+
+    return relations;
+  },
+
+  data: (query, sprawl, group) => ({
+    categoryName: group.category.name,
+    categoryColor: group.category.color,
+  }),
+
+  generate(data, relations, {html, language}) {
+    const {content: previousNextPart} =
+      relations.previousNextLinks.slots({
+        previousLink: relations.previousGroupLink,
+        nextLink: relations.nextGroupLink,
+        id: true,
+      });
+
+    const {categoryLink} = relations;
+
+    categoryLink?.setSlot('content', data.categoryName);
+
+    return relations.secondaryNav.slots({
+      class: 'nav-links-groups',
+      content:
+        (!relations.previousGroupLink && !relations.nextGroupLink
+          ? categoryLink
+          : html.tag('span',
+              {style: relations.colorVariables.slot('color', data.categoryColor).content},
+              [
+                categoryLink.slot('color', false),
+                `(${language.formatUnitList(previousNextPart)})`,
+              ])),
+    });
+  },
+};