Optimise Zone::class to identify region/hosts/hubs

app/Models/Zone.php

@@ -36,6 +36,44 @@ class Zone extends Model
 		return $this->belongsTo(Domain::class);
 	}
 
+	public function hosts()
+	{
+		return $this->hasMany(Address::class)
+			->where(function($query) {
+				return $query
+					->where(fn($q)=>$q->where('node_id',0)->where('point_id',0))
+					->orWhere('role',Address::NODE_HC);
+			})
+			->FTNorder()
+			->with(['system','zone.domain']);
+	}
+
+	public function hubs()
+	{
+		// @todo we should be able to add to this query, to count children of an address by using a group by?
+		return $this->hasMany(Address::class)
+			->where(function($query) {
+				return $query
+					->where(fn($q)=>$q->where('point_id',0))
+					->orWhere('role',Address::NODE_HC);
+			})
+			->FTNorder()
+			->with(['system','zone.domain']);
+	}
+
+	public function regions()
+	{
+		return $this->hasMany(Address::class)
+				->where(function($query) {
+					return $query
+						->where(fn($q)=>$q->where('node_id',0)->where('point_id',0))
+						->orWhere('role',Address::NODE_RC);
+				})
+				->orderBy('region_id')
+				->active()
+				->with(['system','zone.domain']);
+	}
+
 	public function system()
 	{
 		return $this->belongsTo(System::class);