1 files changed, 51 insertions, 0 deletions
diff --git a/src/content/dependencies/listTracksByDuration.js b/src/content/dependencies/listTracksByDuration.js
new file mode 100644
index 0000000..64feb4f
--- /dev/null
+++ b/src/content/dependencies/listTracksByDuration.js
@@ -0,0 +1,51 @@
+import {sortAlphabetically, sortByCount} from '#sort';
+import {filterByCount, stitchArrays} from '#sugar';
+
+export default {
+  contentDependencies: ['generateListingPage', 'linkTrack'],
+  extraDependencies: ['language', 'wikiData'],
+
+  sprawl({trackData}) {
+    return {trackData};
+  },
+
+  query({trackData}, spec) {
+    const tracks = sortAlphabetically(trackData.slice());
+    const durations = tracks.map(track => track.duration);
+
+    filterByCount(tracks, durations);
+    sortByCount(tracks, durations, {greatestFirst: true});
+
+    return {spec, tracks, durations};
+  },
+
+  relations(relation, query) {
+    return {
+      page: relation('generateListingPage', query.spec),
+
+      trackLinks:
+        query.tracks
+          .map(track => relation('linkTrack', track)),
+    };
+  },
+
+  data(query) {
+    return {
+      durations: query.durations,
+    };
+  },
+
+  generate(data, relations, {language}) {
+    return relations.page.slots({
+      type: 'rows',
+      rows:
+        stitchArrays({
+          link: relations.trackLinks,
+          duration: data.durations,
+        }).map(({link, duration}) => ({
+            track: link,
+            duration: language.formatDuration(duration),
+          })),
+    });
+  },
+};