🧑‍💻♻️

Connect4/connect4_lib/Sources/connect4_lib/Board.swift

@@ -4,40 +4,38 @@ public struct Board : CustomStringConvertible {
     
     public let nbRows: Int
     public let nbCols: Int
-    private var nbFree: Int
-    private var grid: [[Int?]]
+    public var grid : [[Int?]] { _grid }
+    var _nbFree: Int
+    var _grid: [[Int?]]
     
     public init?(withRows nbRows: Int = 6, andWithCols nbCols: Int = 7) {
         guard(nbRows > 0 && nbCols > 0) else { return nil }
         self.nbRows = nbRows
         self.nbCols = nbCols
-        self.nbFree = nbRows * nbCols
-        self.grid = Array(repeating: Array(repeating: nil, count: nbCols), count: nbRows)
+        self._nbFree = nbRows * nbCols
+        self._grid = Array(repeating: Array(repeating: nil, count: nbCols), count: nbRows)
     }
     
     public init?(withGrid grid: [[Int?]]) {
         guard(grid.allSatisfy{ $0.count == grid[0].count }) else { return nil }
         self.nbRows = grid.count
         self.nbCols = grid[0].count
-        self.nbFree = nbRows * nbCols
-        self.grid = grid
+        self._nbFree = nbRows * nbCols
+        self._grid = grid
     }
 
-    private func isWithinBounds(_ row: Int, and col: Int) -> Bool {
+    func isWithinBounds(_ row: Int, and col: Int) -> Bool {
         return 0 <= row && row < nbRows
             && 0 <= col && col < nbCols
     }
     
+    static let descriptionMapper : [Int? : String] = [nil : "-", 1 : "X", 2: "O"]
+    
     public var description: String {
         var string = String()
-        for row in grid {
+        for row in _grid {
             for tile in row {
-                string.append(" ")
-                switch(tile) {
-                case 1: string.append("O")
-                case 2: string.append("X")
-                default: string.append("_")
-                }
+                string.append("\(String(describing: Board.descriptionMapper[tile] ?? "-"))")
             }
             string.append("\n")
         }
@@ -45,24 +43,24 @@ public struct Board : CustomStringConvertible {
         return string
     }
 
-    private mutating func insertChip(from playerId: Int, atRow row: Int, atCol col: Int) -> Bool {
+    mutating func insertChip(from playerId: Int, atRow row: Int, atCol col: Int) -> Bool {
         guard(isWithinBounds(row, and: col)) else { return false }
         guard((playerId == 1 || playerId == 2)) else { return false }
         guard(!isFull()) else { return false }
-        guard((grid[row][col] == nil)) else { return false }
+        guard((_grid[row][col] == nil)) else { return false }
         
-        grid[row][col] = playerId
-        nbFree -= 1
+        _grid[row][col] = playerId
+        _nbFree -= 1
         return true
     }
 
     public mutating func insertChip(from playerId: Int, atCol col: Int) -> Bool {
         guard(0 < col && col <= nbCols) else { return false }
 
-        if grid[0][col] != nil { return false }
+        if _grid[0][col] != nil { return false }
                 
         for i in stride(from: nbRows - 1, through: 0, by: -1) {
-            if grid[i][col] == nil {
+            if _grid[i][col] == nil {
                 return insertChip(from: playerId, atRow: i, atCol: col)
             }
         }
@@ -70,14 +68,15 @@ public struct Board : CustomStringConvertible {
         return false
     }
 
-    private mutating func removeChip(fromRow row: Int, fromCol col: Int) {
+    mutating func removeChip(fromRow row: Int, fromCol col: Int) {
         assert(isWithinBounds(row, and: col))
-        grid[row][col] = nil
-        nbFree += 1
+        _grid[row][col] = nil
+        _nbFree += 1
     }
 
     public func isFull() -> Bool {
-        return nbFree <= 0
+        return _nbFree <= 0
     }
+
 }