files

1 files changed, 59 insertions, 0 deletions

diff --git a/dailypuzzle.py b/dailypuzzle.py
new file mode 100644
index 0000000..d4f884e
--- /dev/null
+++ b/dailypuzzle.py
@@ -0,0 +1,59 @@
+#!/usr/bin/env python3
+import chess
+import chess.pgn
+import io
+import json
+import os
+import time
+import urllib.request
+
+OUT = "/var/www/aryanmustafa/api/dailypuzzle"
+INTERVAL = 3600  # check every hour; Lichess updates once per day
+
+os.makedirs(os.path.dirname(OUT), exist_ok=True)
+
+while True:
+    try:
+        req = urllib.request.Request(
+            "https://lichess.org/api/puzzle/daily",
+            headers={"Accept": "application/json"},
+        )
+        with urllib.request.urlopen(req, timeout=10) as r:
+            raw = json.loads(r.read())
+
+        puzzle = raw["puzzle"]
+        game   = raw["game"]
+
+        # Lichess returns the full game PGN; the puzzle starts at initialPly.
+        # Replay up to that ply with python-chess to get the exact FEN.
+        pgn_text    = game["pgn"]
+        initial_ply = puzzle["initialPly"]
+
+        parsed = chess.pgn.read_game(io.StringIO(pgn_text))
+        board  = parsed.board()
+        for i, move in enumerate(parsed.mainline_moves()):
+            board.push(move)
+            if i >= initial_ply:
+                break
+
+        result = {
+            "id":       puzzle["id"],
+            "fen":      board.fen(),
+            "side":     "white" if board.turn == chess.WHITE else "black",
+            "solution": puzzle["solution"],   # UCI list e.g. ["e2e4","d7d5"]
+            "rating":   puzzle.get("rating"),
+            "themes":   puzzle.get("themes", []),
+            "url":      f"https://lichess.org/training/{puzzle['id']}",
+        }
+
+        tmp = OUT + ".tmp"
+        with open(tmp, "w") as f:
+            json.dump(result, f)
+        os.replace(tmp, OUT)  # atomic write
+
+        print(f"updated: puzzle {result['id']}", flush=True)
+
+    except Exception as e:
+        print(f"error: {e}", flush=True)
+
+    time.sleep(INTERVAL)