1 files changed, 31 insertions, 0 deletions
diff --git a/src/content/dependencies/generateArtTagSidebar.js b/src/content/dependencies/generateArtTagSidebar.js
new file mode 100644
index 0000000..51e53d2
--- /dev/null
+++ b/src/content/dependencies/generateArtTagSidebar.js
@@ -0,0 +1,31 @@
+import {collectTreeLeaves} from '#wiki-data';
+
+export default {
+  contentDependencies: ['generateArtTagAncestorSidebarBox'],
+  extraDependencies: ['wikiData'],
+
+  sprawl: ({artTagData}) =>
+    ({artTagData}),
+
+  query(sprawl, artTag) {
+    const baobab = artTag.ancestorArtTagBaobabTree;
+    const uniqueLeaves = new Set(collectTreeLeaves(baobab));
+
+    // Just match the order in tag data.
+    const furthestAncestorArtTags =
+      sprawl.artTagData
+        .filter(artTag => uniqueLeaves.has(artTag));
+
+    return {furthestAncestorArtTags};
+  },
+
+  relations: (relation, query, sprawl, artTag) => ({
+    ancestorBoxes:
+      query.furthestAncestorArtTags
+        .map(ancestorArtTag =>
+          relation('generateArtTagAncestorSidebarBox', ancestorArtTag, artTag)),
+  }),
+
+  generate: (relations) =>
+    ({leftSidebarMultiple: relations.ancestorBoxes}),
+};