Merge branch 'preview' into listing-tweaks

1 files changed, 74 insertions, 0 deletions

diff --git a/src/content/dependencies/generateFlashActNavAccent.js b/src/content/dependencies/generateFlashActNavAccent.js
new file mode 100644
index 00000000..98504385
--- /dev/null
+++ b/src/content/dependencies/generateFlashActNavAccent.js
@@ -0,0 +1,74 @@
+import {empty} from '#sugar';
+
+export default {
+  contentDependencies: [
+    'generatePreviousNextLinks',
+    'linkFlashAct',
+  ],
+
+  extraDependencies: ['html', 'language', 'wikiData'],
+
+  sprawl({flashActData}) {
+    return {flashActData};
+  },
+
+  query(sprawl, flashAct) {
+    // Like with generateFlashNavAccent, don't sort chronologically here.
+    const flashActs =
+      sprawl.flashActData;
+
+    const index = flashActs.indexOf(flashAct);
+
+    const previousFlashAct =
+      (index > 0
+        ? flashActs[index - 1]
+        : null);
+
+    const nextFlashAct =
+      (index < flashActs.length - 1
+        ? flashActs[index + 1]
+        : null);
+
+    return {previousFlashAct, nextFlashAct};
+  },
+
+  relations(relation, query) {
+    const relations = {};
+
+    if (query.previousFlashAct || query.nextFlashAct) {
+      relations.previousNextLinks =
+        relation('generatePreviousNextLinks');
+
+      relations.previousFlashActLink =
+        (query.previousFlashAct
+          ? relation('linkFlashAct', query.previousFlashAct)
+          : null);
+
+      relations.nextFlashActLink =
+        (query.nextFlashAct
+          ? relation('linkFlashAct', query.nextFlashAct)
+          : null);
+    }
+
+    return relations;
+  },
+
+  generate(relations, {html, language}) {
+    const {content: previousNextLinks = []} =
+      relations.previousNextLinks &&
+        relations.previousNextLinks.slots({
+          previousLink: relations.previousFlashActLink,
+          nextLink: relations.nextFlashActLink,
+        });
+
+    const allLinks = [
+      ...previousNextLinks,
+    ].filter(Boolean);
+
+    if (empty(allLinks)) {
+      return html.blank();
+    }
+
+    return `(${language.formatUnitList(allLinks)})`;
+  },
+};