1 files changed, 53 insertions, 3 deletions

diff --git a/src/content/dependencies/generateAlbumSidebar.js b/src/content/dependencies/generateAlbumSidebar.js
index bd53ef71..7cf689cc 100644
--- a/src/content/dependencies/generateAlbumSidebar.js
+++ b/src/content/dependencies/generateAlbumSidebar.js
@@ -1,4 +1,5 @@
-import {stitchArrays} from '#sugar';
+import {sortAlbumsTracksChronologically} from '#sort';
+import {stitchArrays, transposeArrays} from '#sugar';
 
 export default {
   contentDependencies: [
@@ -7,6 +8,7 @@ export default {
     'generateAlbumSidebarTrackListBox',
     'generatePageSidebar',
     'generatePageSidebarConjoinedBox',
+    'generateTrackReleaseBox',
   ],
 
   extraDependencies: ['html', 'wikiData'],
@@ -17,7 +19,7 @@ export default {
       groupData.flatMap(group => group.serieses),
   }),
 
-  query(sprawl, album) {
+  query(sprawl, album, track) {
     const query = {};
 
     query.groups =
@@ -35,6 +37,33 @@ export default {
           series.albums.includes(album) &&
           !query.groups.includes(series.group));
 
+    if (track) {
+      const albumTrackMap =
+        new Map(transposeArrays([
+          track.allReleases.map(t => t.album),
+          track.allReleases,
+        ]));
+
+      const allReleaseAlbums =
+        sortAlbumsTracksChronologically(
+          Array.from(albumTrackMap.keys()));
+
+      const currentReleaseIndex =
+        allReleaseAlbums.indexOf(track.album);
+
+      const earlierReleaseAlbums =
+        allReleaseAlbums.slice(0, currentReleaseIndex);
+
+      const laterReleaseAlbums =
+        allReleaseAlbums.slice(currentReleaseIndex + 1);
+
+      query.earlierReleaseTracks =
+        earlierReleaseAlbums.map(album => albumTrackMap.get(album));
+
+      query.laterReleaseTracks =
+        laterReleaseAlbums.map(album => albumTrackMap.get(album));
+    }
+
     return query;
   },
 
@@ -63,10 +92,25 @@ export default {
       query.disconnectedSerieses
         .map(series =>
           relation('generateAlbumSidebarSeriesBox', album, series)),
+
+    earlierTrackReleaseBoxes:
+      (track
+        ? query.earlierReleaseTracks
+            .map(track =>
+              relation('generateTrackReleaseBox', track))
+        : null),
+
+    laterTrackReleaseBoxes:
+      (track
+        ? query.laterReleaseTracks
+            .map(track =>
+              relation('generateTrackReleaseBox', track))
+        : null),
   }),
 
   data: (_query, _sprawl, _album, track) => ({
     isAlbumPage: !track,
+    isTrackPage: !!track,
   }),
 
   generate(data, relations, {html}) {
@@ -98,9 +142,15 @@ export default {
             ]),
         ],
 
+        data.isTrackPage &&
+          relations.earlierTrackReleaseBoxes,
+
         relations.trackListBox,
 
-        !data.isAlbumPage &&
+        data.isTrackPage &&
+          relations.laterTrackReleaseBoxes,
+
+        data.isTrackPage &&
           relations.conjoinedBox.slots({
             attributes: {class: 'conjoined-group-sidebar-box'},
             boxes: