method to get the root parent zone

src/database/zones.rs

@@ -10,6 +10,38 @@ use crate::try_log;
 use crate::world::Zone;
 
 impl Db {
+	/// Get root zone
+	pub fn root_zone(&self, zone: &Zone) -> RudeResult<Zone> {
+		// get rid of the &
+		let mut zone = Zone {
+			id: zone.id,
+			parent: zone.parent,
+			name: zone.name.clone(),
+			users_visible: zone.users_visible,
+			areas: zone.areas.clone(),
+		};
+
+		// loop until find the root
+		loop {
+			zone = match self.load_zone(zone.id) {
+				Ok(Some(z)) => z,
+				Ok(None) => {
+					log::error!(
+						"{}({}) :: Can't find parent zone :: None value",
+						file!(),
+						line!()
+					);
+					return Err(Box::from("None value"));
+				}
+				Err(e) => return Err(e),
+			};
+
+			if zone.id == zone.parent {
+				return Ok(zone);
+			}
+		}
+	}
+
 	/// Save a zone to the database.
 	pub fn save_zone(&self, zone: &Zone) -> RudeResult<()> {
 		let mut statement = try_log!(