Start to build game grid

rust/sea_battle_backend/src/data/boats_layout.rs

@@ -172,7 +172,7 @@ impl BoatPosition {
 }
 
 #[derive(serde::Serialize, serde::Deserialize, Debug, Clone, Default)]
-pub struct BoatsLayout(Vec<BoatPosition>);
+pub struct BoatsLayout(pub Vec<BoatPosition>);
 
 impl BoatsLayout {
     /// Generate a new invalid (empty) boats layout
@@ -331,6 +331,10 @@ impl BoatsLayout {
         errors
     }
 
+    pub fn is_valid(&self, rules: &GameRules) -> bool {
+        self.errors(rules).is_empty()
+    }
+
     pub fn find_boat_at_position(&self, pos: Coordinates) -> Option<&BoatPosition> {
         self.0.iter().find(|f| f.all_coordinates().contains(&pos))
     }