Add LevelManager + devSprites

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Assets/Scripts/src/Helpers/ListExtensions.cs

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+using System.Collections.Generic;
+using UnityEngine;
+
+namespace src.Helpers
+{
+    public static class ListExtensions
+    {
+        public static void ShuffleList(this List<Vector3> list)
+        {
+            const int min = 0;
+            var max = list.Count - 1;
+            for (var i = min; i < max; i++)
+            {
+                var randomPos = Mathf.FloorToInt(Random.Range(min, max));
+                
+                /* Swap elements in list */
+                var aux = list[randomPos];
+                list[randomPos] = list[i];
+                list[i] = aux;
+            }
+        }
+    }
+}

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Assets/Scripts/src/Managers/LevelManager.cs

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+using System;
+using System.Collections.Generic;
+using src.Base;
+using src.Helpers;
+using UnityEngine;
+using Random = UnityEngine.Random;
+
+namespace src.Managers
+{
+    public class LevelManager : GameplayComponent
+    {
+        public class Count
+        {
+            public readonly int Min;
+            public readonly int Max;
+
+            public Count(int min, int max)
+            {
+                Min = min;
+                Max = max;
+            }
+        }
+
+        public int columns = 30;
+        public int rows = 20;
+
+        /* Specifies how many objects we want per level. */
+        public Count destructibleWallCount = new Count(150, 350);
+        public Count enemyCount = new Count(20, 50);
+
+        /* Holds the starting position of the player */
+        public Transform startPosition;
+        public GameObject indestructibleWallPrefab;
+        public GameObject destructibleWallPrefab;
+
+        /* Used to group spawned objects */
+        public Transform boardHolder;
+
+        /* Holds the available positions */
+        private readonly List<Vector3> _gridPositions = new List<Vector3>();
+
+        /* Test only */
+        public void Awake()
+        {
+            InitBoard();
+            SetupLevel();
+        }
+
+        public void InitBoard()
+        {
+            _gridPositions.Clear();
+            /* We want to iterate over the X axis taking into consideration the startPosition's offset */
+            for (var x = startPosition.position.x; x < columns; x++)
+            {
+                for (var y = startPosition.position.y; y > rows * -1; y--)
+                {
+                    /* We want the following positions to be a safe zone. */
+                    /* Don't place anything on starting position */
+                    if (Math.Abs(x) < 0.001 && Math.Abs(y) < 0.001)
+                    {
+                        continue;
+                    }
+
+                    /* Don't place anything on X=1 and Y=0 */
+                    if (Math.Abs(x - 1) < 0.001 && Math.Abs(y) < 0.001)
+                    {
+                        continue;
+                    }
+
+                    /* Don't place anything on X=0 and Y=1 */
+                    if (Math.Abs(x) < 0.001 && Math.Abs(y - 1) < 0.001)
+                    {
+                        continue;
+                    }
+
+                    /* Place indestructible tiles */
+                    if (PlaceIndestructibleTile(x, y))
+                    {
+                        continue;
+                    }
+
+                    /* Add position to _gridPositions */
+                    _gridPositions.Add(new Vector3(x, y, 0f));
+                }
+            }
+        }
+
+        public void SetupLevel()
+        {
+            var random = new Random();
+            var numberOfDestructilbeWallsToPlace =
+                Mathf.FloorToInt(Random.Range(destructibleWallCount.Min, destructibleWallCount.Max));
+
+            _gridPositions.ShuffleList();
+            foreach (var nextPosition in _gridPositions)
+            {
+                if (numberOfDestructilbeWallsToPlace == 0)
+                {
+                    break;
+                }
+                PlaceDestructibleTile(nextPosition);
+                numberOfDestructilbeWallsToPlace -= 1;
+            }
+        }
+
+        private void PlaceDestructibleTile(Vector3 position)
+        {
+            var instance = Instantiate(destructibleWallPrefab, position, Quaternion.identity);
+            instance.transform.SetParent(boardHolder);
+        }
+
+        private bool PlaceIndestructibleTile(float x, float y)
+        {
+            var absX = Mathf.FloorToInt(x);
+            var absY = Mathf.FloorToInt(y);
+
+            if (absX % 2 == 0 || absY % 2 == 0) return false;
+
+            var instance =
+                Instantiate(indestructibleWallPrefab, new Vector3(x, y, 0f), Quaternion.identity);
+            instance.transform.SetParent(boardHolder);
+            return true;
+        }
+    }
+}

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