initialize repo

Lib/Civilization.Core/Actions/SettleCityAction.cs

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+using Civilization.Core.Game;
+using Civilization.Core.Interfaces;
+using Civilization.Core.Units;
+
+namespace Civilization.Core.Actions;
+
+public class SettleCityAction(Guid unitId) : IGameAction
+{
+    private const int CityNearbyRange = 4;
+    public Guid UnitId { get; } = unitId;
+
+    public bool CanExecute(GameActionContext context)
+    {
+        var unit = context.State.FindUnit(UnitId);
+        
+        if (unit == null || !unit.HasTag(UnitTag.Settle)) return false;
+        if (unit.OwnerId != context.CurrentPlayer.Id) return false;
+        if (unit.ActionPoints < 1) return false;
+
+        var tile = context.Map.GetTile(unit.Position);
+        if (tile is not { OwnerId: null }) return false;
+
+        // Later we could also check if there is city nearby
+        
+        return true;
+    }
+
+    public void Execute(GameActionContext context)
+    {
+        var unit = context.State.FindUnit(UnitId)!;
+        var position = unit.Position;
+
+        context.State.RemoveUnit(UnitId);
+        
+        var city = new City(unit.OwnerId, position);
+        city.ClaimTile(context.Map, position);
+        
+        context.State.AddCity(city);
+    }
+
+    public void Undo(GameActionContext context)
+    {
+        
+    }
+}