content: listAlbumsBy{Tracks,Duration,Date}

1 files changed, 53 insertions, 0 deletions

diff --git a/src/content/dependencies/listAlbumsByTracks.js b/src/content/dependencies/listAlbumsByTracks.js
new file mode 100644
index 00000000..acec5da4
--- /dev/null
+++ b/src/content/dependencies/listAlbumsByTracks.js
@@ -0,0 +1,53 @@
+import {empty, stitchArrays} from '../../util/sugar.js';
+
+export default {
+  contentDependencies: ['generateListingPage', 'linkAlbum'],
+  extraDependencies: ['language', 'wikiData'],
+
+  sprawl({albumData}) {
+    return {albumData};
+  },
+
+  query({albumData}, spec) {
+    return {
+      spec,
+
+      albums:
+        albumData
+          .filter(album => !empty(album.tracks))
+          .sort((a, b) => b.tracks.length - a.tracks.length),
+    };
+  },
+
+  relations(relation, query) {
+    return {
+      page: relation('generateListingPage', query.spec),
+
+      albumLinks:
+        query.albums
+          .map(album => relation('linkAlbum', album)),
+    };
+  },
+
+  data(query) {
+    return {
+      counts:
+        query.albums
+          .map(album => album.tracks.length),
+    };
+  },
+
+  generate(data, relations, {language}) {
+    return relations.page.slots({
+      type: 'rows',
+      rows:
+        stitchArrays({
+          link: relations.albumLinks,
+          count: data.counts,
+        }).map(({link, count}) => ({
+            album: link,
+            tracks: language.countTracks(count, {unit: true}),
+          })),
+    });
+  },
+};