[2] feat - Observer и консольная визуализация

semyanovra/scr/maze.py

@@ -271,6 +271,8 @@ class Pathfinder:
         t1 = time.perf_counter()
         elapsed_ms = (t1 - t0) * 1000
 
+        self.notify("path_found", path)
+
         return PerformanceData(elapsed_ms, self._algorithm.visited_nodes(), len(path))
 
 
@@ -281,19 +283,63 @@ class PerformanceData:
         self.path_length = length
 
 
+# ----------------------------- Наблюдатель и отображение -----------------------------
+class EventListener:
+    def update(self, event_type, data):
+        raise NotImplementedError
+
+
+class ConsoleDisplay(EventListener):
+    def __init__(self):
+        self._last_path = None
+
+    def update(self, event_type, data):
+        if event_type == "maze_loaded":
+            self._render_maze(data)
+        elif event_type == "path_found":
+            self._last_path = data
+            self._render_path(data)
+
+    def _render_maze(self, maze):
+        os.system('cls' if os.name == 'nt' else 'clear')
+        print("=" * (maze.width * 2 + 4))
+        print("   LABYRINTH")
+        print("=" * (maze.width * 2 + 4))
+
+        for y in range(maze.height):
+            print("  ", end='')
+            for x in range(maze.width):
+                cell = maze.cell_at(x, y)
+                if cell == maze.start:
+                    print('S', end=' ')
+                elif cell == maze.exit:
+                    print('E', end=' ')
+                elif cell.is_wall:
+                    print('#', end=' ')
+                else:
+                    print('.', end=' ')
+            print()
+        print("=" * (maze.width * 2 + 4))
+        print("  S - start  E - exit  # - wall  . - path")
+
+    def _render_path(self, path):
+        if not path:
+            print("\n  Path not found!")
+            return
+        print(f"\n  Path found! Length: {len(path)}")
+
+
 if __name__ == "__main__":
     builder = TxtLabyrinthBuilder()
     maze = builder.build_from_file("maze/level1.txt")
     
+    view = ConsoleDisplay()
+    view.update("maze_loaded", maze)
+    
     pf = Pathfinder(maze)
-    pf.set_algorithm(BFS())
-    stats = pf.solve()
-    print(f"BFS: {stats.time_ms:.3f}ms, visited={stats.visited_cells}, length={stats.path_length}")
+    pf.attach(view)
     
-    pf.set_algorithm(DFS())
-    stats = pf.solve()
-    print(f"DFS: {stats.time_ms:.3f}ms, visited={stats.visited_cells}, length={stats.path_length}")
-    
-    pf.set_algorithm(AStar())
-    stats = pf.solve()
-    print(f"A*: {stats.time_ms:.3f}ms, visited={stats.visited_cells}, length={stats.path_length}")
+    for algo, name in [(BFS(), "BFS"), (DFS(), "DFS"), (AStar(), "A*")]:
+        pf.set_algorithm(algo)
+        stats = pf.solve()
+        print(f"{name}: {stats.time_ms:.3f}ms, visited={stats.visited_cells}, length={stats.path_length}")