From bc47a4c3efe6006b42f1a4925a0994dc3e5093d1 Mon Sep 17 00:00:00 2001
From: Peter Ward <peteraward@gmail.com>
Date: Mon, 28 Sep 2009 12:17:22 +1000
Subject: Added a compatibility layer for Gregsnakebots.

---
 oldbot.py        | 29 ++++++++++++++++++++
 oldbots/peter.py | 83 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 peter.py         | 71 ------------------------------------------------
 snake.py         |  4 +--
 4 files changed, 114 insertions(+), 73 deletions(-)
 create mode 100644 oldbot.py
 create mode 100755 oldbots/peter.py
 delete mode 100644 peter.py

diff --git a/oldbot.py b/oldbot.py
new file mode 100644
index 0000000..436375c
--- /dev/null
+++ b/oldbot.py
@@ -0,0 +1,29 @@
+import subprocess
+
+class BotWrapper(object):
+    def __init__(self, process):
+        self.process = process
+
+    def __call__(self, board, (x, y)):
+        height = len(board)
+        width = len(board[0])
+
+        letter = board[y][x].lower()
+
+        proc = subprocess.Popen(
+            [self.process],
+            stdin=subprocess.PIPE,
+            stdout=subprocess.PIPE,
+        )
+
+        board = '\n'.join([''.join(row) for row in board])
+
+        print>>proc.stdin, width, height, letter
+        print>>proc.stdin, board
+        proc.stdin.close()
+        proc.wait()
+
+        if proc.returncode == 0:
+            output = proc.stdout.read()
+        return output.strip()
+
diff --git a/oldbots/peter.py b/oldbots/peter.py
new file mode 100755
index 0000000..72bbc95
--- /dev/null
+++ b/oldbots/peter.py
@@ -0,0 +1,83 @@
+#!/usr/bin/env python
+"""New and improved bot, OPTIMISED!!"""
+
+import random
+import sys
+
+EMPTY_TILE = '.'
+APPLE_TILE = '*'
+
+WIDTH, HEIGHT, SNAKE_BODY = raw_input().split()
+WIDTH = int(HEIGHT)
+HEIGHT = int(HEIGHT)
+
+SNAKE_BODY = SNAKE_BODY.lower()
+SNAKE_HEAD = SNAKE_BODY.upper()
+
+HEADX = None
+HEADY = None
+
+def get_cell(board, x, y):
+    if x < 0 or x >= WIDTH or y < 0 or y >= HEIGHT:
+        raise KeyError, 'out of range.'
+    return board[y][x]
+
+BOARD = []
+for y in xrange(HEIGHT):
+    row = raw_input()
+    for x, char in enumerate(row):
+        if char == SNAKE_HEAD:
+            HEADX = x
+            HEADY = y
+    BOARD.append(row)
+
+md_two = {
+    (-1, 0, 'l'): ((-2, 0), (-1, 1), (-1, -1)),
+    (0, -1, 'u'): ((-1, -1), (1, -1), (0, -2)),
+    (1, 0, 'r'): ((2, 0), (1, 1), (1, -1)),
+    (0, 1, 'd'): (((0, 2), (-1, 1), (1, 1))),
+}
+
+max_score = 0
+max_moves = []
+
+for (dx, dy, move), adj in md_two.items():
+    score = 0
+
+    try:
+        square = get_cell(BOARD, HEADX + dx, HEADY + dy)
+    except KeyError:
+        continue
+
+    if square == APPLE_TILE:
+        score += 2
+    elif square != EMPTY_TILE:
+        continue # Definitely cannot move here.
+
+    for ddx, ddy in adj:
+        try:
+            square = get_cell(BOARD, HEADX + ddx, HEADY + ddy)
+        except KeyError:
+            score -= 1
+            continue
+
+        if square == APPLE_TILE:
+            score += 2
+        elif square == EMPTY_TILE:
+            score += 1
+        elif square == SNAKE_BODY:
+            score -= 1
+        elif square.isupper():
+            score += 3
+
+    if score == max_score:
+        max_moves.append(move)
+    elif score > max_score:
+        max_score = score
+        max_moves = [move]
+
+if max_moves:
+    print random.choice(max_moves)
+else:
+    print 'U' # Suicide!
+
diff --git a/peter.py b/peter.py
deleted file mode 100644
index b182575..0000000
--- a/peter.py
+++ /dev/null
@@ -1,71 +0,0 @@
-#!/usr/bin/env python
-"""New and improved bot, OPTIMISED!!"""
-
-import random
-import sys
-
-from common import *
-
-def peter_bot(board, (HEADX, HEADY)):
-    HEIGHT = len(board)
-    WIDTH = len(board[0])
-    SNAKE_BODY = board[HEADY][HEADX]
-
-    SNAKE_BODY = SNAKE_BODY.lower()
-    SNAKE_HEAD = SNAKE_BODY.upper()
-
-    def get_cell(board, x, y):
-        if x < 0 or x >= WIDTH or y < 0 or y >= HEIGHT:
-            raise KeyError, 'out of range.'
-        return board[y][x]
-
-    md_two = {
-        (-1, 0, 'l'): ((-2, 0), (-1, 1), (-1, -1)),
-        (0, -1, 'u'): ((-1, -1), (1, -1), (0, -2)),
-        (1, 0, 'r'): ((2, 0), (1, 1), (1, -1)),
-        (0, 1, 'd'): (((0, 2), (-1, 1), (1, 1))),
-    }
-
-    max_score = 0
-    max_moves = []
-
-    for (dx, dy, move), adj in md_two.items():
-        score = 0
-
-        try:
-            square = get_cell(board, HEADX + dx, HEADY + dy)
-        except KeyError:
-            continue
-
-        if square == Squares.APPLE:
-            score += 2
-        elif square != Squares.EMPTY:
-            continue # Definitely cannot move here.
-
-        for ddx, ddy in adj:
-            try:
-                square = get_cell(board, HEADX + ddx, HEADY + ddy)
-            except KeyError:
-                score -= 1
-                continue
-
-            if square == Squares.APPLE:
-                score += 2
-            elif square == Squares.EMPTY:
-                score += 1
-            elif square == SNAKE_BODY:
-                score -= 1
-            elif square.isupper():
-                score += 3
-
-        if score == max_score:
-            max_moves.append(move)
-        elif score > max_score:
-            max_score = score
-            max_moves = [move]
-
-    if max_moves:
-        return random.choice(max_moves)
-    else:
-        return 'U' # Suicide!
-
diff --git a/snake.py b/snake.py
index f0bf46b..46f7db2 100755
--- a/snake.py
+++ b/snake.py
@@ -235,13 +235,13 @@ class SnakeEngine(object):
 
 if __name__ == '__main__':
     from bots import *
-    from peter import *
+    from oldbot import BotWrapper
 
     game = SnakeEngine(25, 25, 50)
     game.add_bot(right_bot)
     game.add_bot(random_bot)
     game.add_bot(random_bounds_bot)
     game.add_bot(random_square_bot)
-    game.add_bot(peter_bot)
+    game.add_bot(BotWrapper('oldbots/peter.py'))
     game.run()
 
-- 
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