1 files changed, 56 insertions, 0 deletions
diff --git a/src/content/dependencies/listGroupsByDuration.js b/src/content/dependencies/listGroupsByDuration.js
new file mode 100644
index 0000000..da2f26d
--- /dev/null
+++ b/src/content/dependencies/listGroupsByDuration.js
@@ -0,0 +1,56 @@
+import {sortAlphabetically, sortByCount} from '#sort';
+import {filterByCount, stitchArrays} from '#sugar';
+import {getTotalDuration} from '#wiki-data';
+
+export default {
+  contentDependencies: ['generateListingPage', 'linkGroup'],
+  extraDependencies: ['language', 'wikiData'],
+
+  sprawl({groupData}) {
+    return {groupData};
+  },
+
+  query({groupData}, spec) {
+    const groups = sortAlphabetically(groupData.slice());
+    const durations =
+      groups.map(group =>
+        getTotalDuration(
+          group.albums.flatMap(album => album.tracks),
+          {originalReleasesOnly: true}));
+
+    filterByCount(groups, durations);
+    sortByCount(groups, durations, {greatestFirst: true});
+
+    return {spec, groups, durations};
+  },
+
+  relations(relation, query) {
+    return {
+      page: relation('generateListingPage', query.spec),
+
+      groupLinks:
+        query.groups
+          .map(group => relation('linkGroup', group)),
+    };
+  },
+
+  data(query) {
+    return {
+      durations: query.durations,
+    };
+  },
+
+  generate(data, relations, {language}) {
+    return relations.page.slots({
+      type: 'rows',
+      rows:
+        stitchArrays({
+          link: relations.groupLinks,
+          duration: data.durations,
+        }).map(({link, duration}) => ({
+            group: link,
+            duration: language.formatDuration(duration),
+          })),
+    });
+  },
+};