hard q31: define MapGrid for map

q31/mapGrid.h

@@ -0,0 +1,50 @@
+#include <string>
+#include <memory>
+#include <vector>
+#include <unordered_map>
+
+enum class TileType{
+    EMPTY,
+    WALL,
+    NOMAL_BEAN,
+    ENERGY_BEAN,
+    PACMAN,
+    GHOST
+};
+
+struct Tile{
+    TileType type;
+    std::unordered_map<TileType, std::string> tileTypeToPlaceholder{
+        {TileType::EMPTY, " "},
+        {TileType::WALL, "#"},
+        {TileType::NOMAL_BEAN, "."},
+        {TileType::ENERGY_BEAN, "o"},
+        {TileType::PACMAN, "P"},
+        {TileType::GHOST, "G"}
+    };
+
+    Tile() = default;
+    Tile(TileType t) : type(t) {}
+};
+
+class MapGrid{
+public:
+    MapGrid() = default;
+
+    MapGrid(const std::string& mapFilePath);
+    
+    void loadMap(const std::string& mapFilePath);;
+
+    std::unique_ptr<std::pair<int, int>> getSize() const;
+
+    bool isValidPosition(int x, int y) const;
+
+    void setTile(int x, int y, TileType type, const std::string& placeholder);
+
+    void renderMap() const;
+
+    void move();    // 应该是 W A S D 移动
+private:
+    std::vector<std::vector<Tile>> grid;
+    std::unique_ptr<std::pair<int, int>> size;
+};