1 files changed, 96 insertions, 0 deletions
diff --git a/src/content/dependencies/generateAlbumSecondaryNav.js b/src/content/dependencies/generateAlbumSecondaryNav.js
new file mode 100644
index 00000000..b2cfef69
--- /dev/null
+++ b/src/content/dependencies/generateAlbumSecondaryNav.js
@@ -0,0 +1,96 @@
+export default {
+  contentDependencies: [
+    'generateColorStyleVariables',
+    'generateSecondaryNav',
+    'linkAlbum',
+    'linkGroup',
+    'linkTrack',
+  ],
+
+  extraDependencies: ['html', 'language'],
+
+  relations(relation, album) {
+    const relations = {};
+
+    relations.secondaryNav =
+      relation('generateSecondaryNav');
+
+    relations.groupParts =
+      album.groups.map(group => {
+        const relations = {};
+
+        relations.groupLink =
+          relation('linkGroup', group);
+
+        relations.colorVariables =
+          relation('generateColorStyleVariables', group.color);
+
+        if (album.date) {
+          const albums = group.albums.filter(album => album.date);
+          const index = albums.indexOf(album);
+          const previousAlbum = (index > 0) && albums[index - 1];
+          const nextAlbum = (index < albums.length - 1) && albums[index + 1];
+
+          if (previousAlbum) {
+            relations.previousAlbumLink =
+              relation('linkAlbum', previousAlbum);
+          }
+
+          if (nextAlbum) {
+            relations.nextAlbumLink =
+              relation('linkAlbum', nextAlbum);
+          }
+        }
+
+        return relations;
+      });
+
+    return relations;
+  },
+
+  slots: {
+    mode: {
+      validate: v => v.is('album', 'track'),
+      default: 'album',
+    },
+  },
+
+  generate(relations, slots, {html, language}) {
+    return relations.secondaryNav.slots({
+      class: 'nav-links-groups',
+      content:
+        relations.groupParts.map(({
+          colorVariables,
+          groupLink,
+          previousAlbumLink,
+          nextAlbumLink,
+        }) => {
+          const links = [
+            previousAlbumLink
+              ?.slots({
+                color: false,
+                content: language.$('misc.nav.previous'),
+              }),
+
+            nextAlbumLink
+              ?.slots({
+                color: false,
+                content: language.$('misc.nav.next'),
+              }),
+          ].filter(Boolean);
+
+          return (
+            (slots.mode === 'album'
+              ? html.tag('span', {style: colorVariables}, [
+                  language.$('albumSidebar.groupBox.title', {
+                    group: groupLink,
+                  }),
+                  `(${language.formatUnitList(links)})`,
+                ])
+              : language.$('albumSidebar.groupBox.title', {
+                  group: groupLink,
+                })));
+        }),
+    });
+  },
+};