Make default collections configurable

Author: sunu

helm-chart/values.yaml

@@ -43,6 +43,7 @@ api:
     GEODINI_API: "https://geodini.k8s.labs.ds.io"
     STAC_CATALOG_NAME: "planetarycomputer"
     STAC_CATALOG_URL: "https://planetarycomputer.microsoft.com/api/stac/v1"
+    DEFAULT_TARGET_COLLECTIONS: "['landsat-8-c2-l2', 'sentinel-2-l2a']"
 
   # Sensitive environment variables stored as Kubernetes secrets
   secrets:

stac_search/agents/items_search.py

@@ -1,4 +1,5 @@
 from datetime import date
+import json
 import logging
 import os
 from dataclasses import dataclass
@@ -21,6 +22,10 @@
 STAC_CATALOG_URL = os.getenv(
     "STAC_CATALOG_URL", "https://planetarycomputer.microsoft.com/api/stac/v1"
 )
+DEFAULT_TARGET_COLLECTIONS = json.loads(
+    os.getenv("DEFAULT_TARGET_COLLECTIONS", '["landsat-8-c2-l2", "sentinel-2-l2a"]')
+)
+
 
 logger = logging.getLogger(__name__)
 
@@ -277,10 +282,7 @@ async def item_search(ctx: Context) -> ItemSearchResult:
     # determine the collections to search
     target_collections = await search_collections(ctx.query) or []
     logger.info(f"Target collections: {pformat(target_collections)}")
-    default_target_collections = [
-        "landsat-8-c2-l2",
-        "sentinel-2-l2a",
-    ]
+    default_target_collections = DEFAULT_TARGET_COLLECTIONS
     if target_collections:
         explanation = "Considering the following collections:"
         for result in target_collections.collections: