From 83bcf00701c3c08941db9e038b9ce7b033228164 Mon Sep 17 00:00:00 2001
From: William Valencia <william.m.valencia@nasa.gov>
Date: Thu, 22 Aug 2024 18:04:56 -0400
Subject: [PATCH] CMR-10043: Adding browse asset to items

---
 src/domains/stac.ts | 23 ++++++++++++++++++++++-
 1 file changed, 22 insertions(+), 1 deletion(-)

diff --git a/src/domains/stac.ts b/src/domains/stac.ts
index ad627df4..ce35778b 100644
--- a/src/domains/stac.ts
+++ b/src/domains/stac.ts
@@ -97,6 +97,27 @@ const thumbnailAssets = (concept: Collection | Granule) => {
     }, {} as AssetLinks);
 };
 
+/**
+ * Return browse assets if present.
+ */
+const browseAssets = (concept: Collection | Granule) => {
+    const browseTypes = [RelatedUrlType.GET_RELATED_VISUALIZATION];
+    return (concept.relatedUrls ?? [])
+      .filter((relatedUrl) =>
+        browseTypes.find((browseType) => (browseType === relatedUrl["type"] && relatedUrl.url.startsWith("http")))
+      )
+      .reduce((metadataAssets, relatedUrl, idx, available) => {
+        const browseAsset: AssetLinks = {};
+        browseAsset[`browse`] = {
+          href: relatedUrl.url,
+          title: `Download ${relatedUrl.url.split("/").at(-1)}`,
+          type: "image/jpeg",
+          roles: ["browse"],
+        };
+        return { ...metadataAssets, ...browseAsset };
+      }, {} as AssetLinks);
+  };
+
 /**
  * Reducer for s3 buckets.
  */
@@ -144,7 +165,7 @@ const s3Assets = (concept: Collection | Granule) => {
   return s3Assets;
 };
 
-const defaultExtractors = [thumbnailAssets, downloadAssets, metadataAssets, s3Assets];
+const defaultExtractors = [browseAssets, thumbnailAssets, downloadAssets, metadataAssets, s3Assets];
 
 /**
  * Given a concept and a list of asset extractors return available assets.