if the region_name filter is enabled fetch only these regions

Author: businessbean

internal/netbox/query.go

@@ -37,7 +37,7 @@ func Query(input concourse.Input, ctx context.Context) ([]concourse.Version, err
 	}
 
 	// Pre-fetch all site regions to avoid per-device API calls
-	siteRegionCache, err = fetchSiteRegions(client, ctx)
+	siteRegionCache, err = fetchSiteRegions(client, netboxFilter, ctx)
 	if err != nil {
 		return nil, fmt.Errorf("error during site region query: %w", err)
 	}
@@ -321,7 +321,7 @@ func getTimestamps(device any, input concourse.Input) (*time.Time, time.Time, er
 	return lastUpdatedTime, referenceTime, nil
 }
 
-func fetchSiteRegions(client *netbox.APIClient, ctx context.Context) (map[int32]string, error) {
+func fetchSiteRegions(client *netbox.APIClient, netboxFilter filter.NetboxObject, ctx context.Context) (map[int32]string, error) {
 	cache := make(map[int32]string)
 	if client == nil {
 		return cache, nil
@@ -331,6 +331,9 @@ func fetchSiteRegions(client *netbox.APIClient, ctx context.Context) (map[int32]
 	offset := int32(0)
 	for {
 		query := client.DcimAPI.DcimSitesList(ctx).Limit(limit).Offset(offset)
+		if len(netboxFilter.RegionName) > 0 {
+			query = query.Region(netboxFilter.RegionName)
+		}
 		siteResponse, _, err := query.Execute()
 		if err != nil {
 			return nil, fmt.Errorf("error during DcimSitesList query: %w", err)