Do another refactoring of frontend

adapter/adapter.py

@@ -22,11 +22,10 @@ engine = subprocess.Popen(
 
 
 def make_piece(piece_str):
-    piece_type, color, file, rank = piece_str
+    piece_type, color = piece_str
     return {
-        "who": dict(PIECE_TYPE)[piece_type],
+        "piece_type": dict(PIECE_TYPE)[piece_type],
         "color": dict(COLOR)[color],
-        "position": f"{file}{rank}",
     }
 
 
@@ -35,10 +34,10 @@ def get_state():
     engine.stdin.write(b"get_state\n")
     engine.stdin.flush()
     position_str = engine.stdout.readline().decode("ascii").strip()
-    position = [
-        make_piece(position_str[i : i + 4])
+    position = {
+        position_str[i + 2 : i + 4]: make_piece(position_str[i : i + 2])
         for i in range(0, len(position_str), 4)
-    ]
+    }
     return flask.jsonify(position)