ruby warrior

There is a fun little project on github called ruby warrior. It's an interactive way to learn ruby where you guide a warrior through levels by implementing a simple function that gets called at every turn. I didn't try to achieve the secondary objectives or anything fancy but here's my solution:

 1 class Player
 2   @@ALL_DIRECTIONS = [:forward, :left, :right, :backward]
 3 
 4   def play_turn(warrior)
 5     @warrior = warrior
 6 
 7     begin
 8       rest_if_safe_to_do_so
 9       bind_enemies_if_too_many
10       attack_enemies_if_any
11       attack_captives_if_present
12       move_towards_stairs
13     rescue
14       raise if $!.message != "end of turn"
15     end
16   end
17 
18   def rest_if_safe_to_do_so
19     rest if safe_to_rest? and @warrior.health < 20
20   end
21 
22   def bind_enemies_if_too_many
23     directions_with_enemies = @@ALL_DIRECTIONS.select {|d| @warrior.feel(d).enemy? }
24     bind directions_with_enemies.first if directions_with_enemies.size > 1
25   end
26 
27   def safe_to_rest?
28     @@ALL_DIRECTIONS.all? do |direction|
29       !@warrior.feel(direction).enemy?
30     end
31   end
32 
33   def attack_enemies_if_any
34       @@ALL_DIRECTIONS.each do |direction|
35         space = @warrior.feel direction
36         attack(direction) if space.enemy?
37       end
38   end
39 
40   def attack_captives_if_present
41     directions_with_captives = @@ALL_DIRECTIONS.select {|d| @warrior.feel(d).captive? }
42     attack directions_with_captives.first if !directions_with_captives.empty?
43   end
44 
45   def move_towards_stairs
46       walk @warrior.direction_of_stairs
47   end
48 
49   def attack direction
50     @warrior.attack! direction
51     raise "end of turn"
52   end
53 
54   def walk direction
55     @warrior.walk! direction
56     raise "end of turn"
57   end
58 
59   def rest
60     @warrior.rest!
61     raise "end of turn"
62   end
63 
64   def bind direction
65     @warrior.bind! direction
66     raise "end of turn"
67   end
68 
69 end