重构: aiohttp 全异步 + chessdb 云库 + uv 管理

xiangqi_bot/coords.py

@@ -0,0 +1,67 @@
+# -*- coding: utf-8 -*-
+"""坐标转换: 站点坐标(行1-10) <-> 引擎 UCCI(行0-9), 以及 FEN 构建。"""
+import re
+
+MOVE_RE = re.compile(r'^([a-i])(\d+)([a-i])(\d+)$')
+
+INITIAL_GRID = (
+    'rnbakabnr'
+    '.........'
+    '.c.....c.'
+    'p.p.p.p.p'
+    '.........'
+    '.........'
+    'P.P.P.P.P'
+    '.C.....C.'
+    '.........'
+    'RNBAKABNR'
+)
+
+
+def _sub(m, delta):
+    return f'{m.group(1)}{int(m.group(2)) + delta}{m.group(3)}{int(m.group(4)) + delta}'
+
+
+def site_to_ucci(m):
+    """'b3e3'->'b2e2', 'h10g8'->'h9g7' (站点行号 1-10, 引擎行号 0-9)."""
+    return MOVE_RE.sub(lambda x: _sub(x, -1), m)
+
+
+def ucci_to_site(m):
+    """'b2e2'->'b3e3', 'h9g7'->'h10g8'."""
+    return MOVE_RE.sub(lambda x: _sub(x, +1), m)
+
+
+def ucci_to_rc(m):
+    """UCCI 'b2e2' -> ((row,col),(row,col)); row 0 = 黑方底线(FEN 首行) = 9 - rank."""
+    g = MOVE_RE.match(m)
+    if not g:
+        raise ValueError(f'走法格式错误: {m}')
+    return (9 - int(g.group(2)), ord(g.group(1)) - 97), (9 - int(g.group(4)), ord(g.group(3)) - 97)
+
+
+def fen_from_moves(moves_ucci):
+    """从初始局面盲走生成 FEN(不走法合法性校验, 走法来自服务器视为可信)。"""
+    grid = list(INITIAL_GRID)
+    turn = 'w'
+    for m in moves_ucci:
+        (r1, c1), (r2, c2) = ucci_to_rc(m)
+        grid[r2 * 9 + c2] = grid[r1 * 9 + c1]
+        grid[r1 * 9 + c1] = '.'
+        turn = 'b' if turn == 'w' else 'w'
+    rows = []
+    for r in range(10):
+        row, empty = '', 0
+        for c in range(9):
+            ch = grid[r * 9 + c]
+            if ch == '.':
+                empty += 1
+            else:
+                if empty:
+                    row += str(empty)
+                    empty = 0
+                row += ch
+        if empty:
+            row += str(empty)
+        rows.append(row)
+    return '/'.join(rows) + f' {turn} - - 0 1'