almost ready for production

sgfengine.py

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+# Needs sgf-render and sgfmill
+# https://mjw.woodcraft.me.uk/sgfmill/doc/1.1.1/properties.html?highlight=list%20properties
+import os
+from sgfmill import sgf, boards, sgf_moves, ascii_boards
+
+# This file only deals with the png and sgf side of things. To manage users etc go to the main file.
+
+def new_game(channel_id):
+    game= sgf.Sgf_game(19)
+
+    with open (channel_id+".sgf", "wb") as f:
+        f.write(game.serialise())
+    f.close()
+
+    os.system("sgf-render --style fancy -o "+channel_id+".png -n last "+channel_id+".sgf")
+
+# Could be an illegal move, or maybe I don't understand the message
+# outputs to <channel_id>.png
+def play_move(channel_id, messagestr, player):
+
+    thecol= ord(messagestr[0].lower()) - ord('a')
+    if thecol>8: thecol-=1 # Go boards don't have an I column!!
+    therow= int(messagestr[1:]) - 1
+
+    with open(channel_id+".sgf","rb") as f:
+        game = sgf.Sgf_game.from_bytes(f.read())
+    f.close()
+
+    koban=None
+    node= game.get_last_node()
+    board, moves= sgf_moves.get_setup_and_moves(game)
+    for (colour, (row, col)) in moves:
+        koban=board.play(row,col,colour)
+
+    if (therow, thecol)==koban:
+        raise ValueError("Ko banned move!")
+
+    colour = "w" if ("B" in node.properties()) else "b"
+
+    board2= board.copy()
+    try:
+        board2.play(therow, thecol, colour)
+    except ValueError as e:
+        raise ValueError("Illegal move1!")
+
+    if ascii_boards.render_board(board)== ascii_boards.render_board(board2):
+        raise ValueError("Illegal move2!")
+
+    #print(moves)
+
+    node2= node.new_child()
+    node2.set(("B" if colour =='b' else "W"), (therow,thecol))
+    if koban is not None: node2.set("SQ", [koban])
+    node2.set("CR", [(therow, thecol)])
+    node2.set("C", player) # I think this would be fun for the review
+    if node.has_property("CR"): node.unset("CR")
+    if node.has_property("SQ"): node.unset("SQ")
+
+    with open (channel_id+".sgf", "wb") as f:
+        f.write(game.serialise())
+    f.close()
+
+    os.system("sgf-render --style fancy -o "+channel_id+".png -n last "+channel_id+".sgf")
+
+# colour is "B" if black resigns, "W" if white resigns
+def resign(channel_id, colour, file_name):
+    with open(channel_id+".sgf","rb") as f:
+        game = sgf.Sgf_game.from_bytes(f.read())
+    f.close()
+
+    node= game.root
+    node.set("RE", ("B" if colour=="W" else "W")+"+R")
+
+    with open (file_name, "wb") as f:
+        f.write(game.serialise())
+    f.close()
+
+    os.remove(channel_id+".sgf")