Update appStore/prep_data.py

add get_max_end_year function

appStore/prep_data.py

@@ -64,3 +64,29 @@ def remove_duplicates(results_list):
             unique_results.append(r)
 
     return unique_results
+
+
+def get_max_end_year(_client, collection_name):
+    """
+    Return the maximum 'end_year' in the entire collection 
+    so we can set the slider's max_value dynamically.
+    """
+    # For safety, get a large pool of items
+    all_res = hybrid_search(_client, "", collection_name, limit=2000)
+    big_list = all_res[0] + all_res[1]
+
+    years = []
+    for r in big_list:
+        metadata = r.payload.get('metadata', {})
+        year_str = metadata.get('end_year', None)
+        if year_str:
+            try:
+                years.append(float(year_str))
+            except ValueError:
+                pass
+
+    if not years:
+        # fallback if no valid end years found
+        return 2030
+    return int(max(years))
+