Added downstream(), and fixed failing tests in RoutingTest

app/Models/Address.php

@@ -873,6 +873,19 @@ class Address extends Model
 		return $children->filter(function($item) use ($exclude) { return ! $exclude->pluck('id')->contains($item->id);});
 	}
 
+	/**
+	 * List of all our nodes and their children
+	 *
+	 * @return \Illuminate\Support\Collection
+	 * @throws \Exception
+	 */
+	public function downstream(): \Illuminate\Support\Collection
+	{
+		return $this->downlinks()->transform(function($item) {
+			return $item->nodes()->push($item);
+		})->flatten();
+	}
+
 	/**
 	 * Files waiting to be sent to this system
 	 *
@@ -1149,6 +1162,29 @@ class Address extends Model
 		return Netmail::whereIn('id',$netmails->pluck('id'))->get();
 	}
 
+	public function nodes(): Collection
+	{
+		switch ($this->role_id) {
+			case self::NODE_NN:
+				return $this->nodes_point;
+
+			case self::NODE_HC:
+				return $this->nodes_hub;
+
+			case self::NODE_NC:
+				return $this->nodes_net;
+
+			case self::NODE_RC:
+				return $this->nodes_region;
+
+			case self::NODE_ZC:
+				return $this->nodes_zone;
+
+			default:
+				return new Collection;
+		}
+	}
+
 	/**
 	 * Find the immediate parent for this node.
 	 *