beginnings of group detection

grid.gd

@@ -5,7 +5,7 @@ extends Node2D
 
 @export var offset: float = 55.0
 
-var grid: Array
+var grid: Array[Array]
 
 var token = preload("res://token.tscn")
 
@@ -17,3 +17,27 @@ func _ready():
 			add_child(token_node)
 			token_node.position = Vector2(offset*row, offset*column)
 			grid[row].append(token_node)
+			
+	calculate_token_groups()
+			
+func populate_grid():
+	pass
+	
+func calculate_token_groups():
+	for row in rows:
+		for col in cols:
+			var current_token = grid[row][col]
+			var adjacent_token_coords = [
+				[row - 1, col],
+				[row, col + 1],
+				[row + 1, col],
+				[row, col - 1]
+			]
+			
+			var valid_coords = adjacent_token_coords.filter(
+				func(coord_pair): return coord_pair[0] >= 0 and coord_pair[0] < rows and coord_pair[1] >= 0 and coord_pair[1] < cols
+			)
+			
+			for coord in valid_coords:
+				if grid[coord[0]][coord[1]].type == current_token.type:
+					print(coord)