Expose last index time in graph

packages/skin-database/api/graphql/resolvers/ClassicSkinResolver.ts

@@ -35,4 +35,12 @@ export default class ClassicSkinResolver
     const reviews = await this._model.getReviews();
     return reviews.map((row) => new ReviewResolver(row));
   }
+  async last_algolia_index_update_date() {
+    const updates = await this._model.getAlgoliaIndexUpdates(1);
+    if (updates.length < 1) {
+      return null;
+    }
+    const update = updates[0];
+    return new Date(update.update_timestamp * 1000).toISOString();
+  }
 }

packages/skin-database/api/graphql/schema.graphql

@@ -221,6 +221,12 @@ type ClassicSkin implements Skin & Node {
   reivew page, or via the Discord bot.
   """
   reviews: [Review]
+
+  """
+  The date on which this skin was last updated in the Algolia search index.
+  Given in simplified extended ISO format (ISO 8601).
+  """
+  last_algolia_index_update_date: String
 }
 
 """

packages/skin-database/data/SkinModel.ts

@@ -370,6 +370,10 @@ export default class SkinModel {
     );
   }
 
+  async getAlgoliaIndexUpdates(limit?: number): Promise<any[]> {
+    return Skins.searchIndexUpdatesForSkin(this.getMd5(), limit);
+  }
+
   async withScreenshotTempFile<T>(
     cb: (file: string) => Promise<T>
   ): Promise<T> {

packages/skin-database/data/skins.ts

@@ -342,6 +342,22 @@ export async function getSkinsToShoot(limit: number): Promise<string[]> {
   return results.map((row) => row.md5);
 }
 
+export async function searchIndexUpdatesForSkin(
+  md5: string,
+  limit?: number
+): Promise<
+  Array<{ skin_md5: string; update_timestamp: number; field: string }>
+> {
+  let query = knex("algolia_field_updates")
+    .where({ skin_md5: md5 })
+    .orderBy("update_timestamp", "desc");
+
+  if (limit != null) {
+    query = query.limit(limit);
+  }
+  return query.select();
+}
+
 export async function recordSearchIndexUpdates(
   md5: string,
   fields: string[]