Merge pull request reedlaw#3 from ianterrell/master

Great idea.

Author: Reed G. Law

players/ian_terrell.rb

@@ -0,0 +1,74 @@
+module IanTerrell
+  HEALTH_BUFFER = 1.5
+  
+  def move
+    if i_can_be_killed?
+      if those_who_can_kill_me.size == 1 && i_can_kill?(those_who_can_kill_me.first)
+        [:attack, those_who_can_kill_me.first]
+      else
+        [:rest]
+      end
+    else
+      if those_killable.empty?
+        if stats[:health] > HEALTH_BUFFER * opponents_max_health
+          [:attack, random_low_health_opponent]
+        else
+          [:rest]
+        end
+      else
+        [:attack, those_killable.first]
+      end
+    end
+  end
+  
+  def to_s
+    "Ian Terrell"
+  end
+  
+protected  
+  def i_can_be_killed?
+    opponents.any?{ |player| can_kill?(player, self) }
+  end
+  
+  def i_can_kill?(defender)
+    can_kill?(self, defender)
+  end
+  
+  def expected_damage(aggressor, defender)
+    aggressor.stats[:strength] - defender.stats[:defense]/2
+  end
+  
+  def can_kill?(aggressor, defender)
+    expected_damage(aggressor, defender) > defender.stats[:health]
+  end
+  
+  def opponents
+    Game.world[:players].select{ |player| player != self}
+  end
+  
+  def opponents_max_health
+    opponents.map{ |player| player.stats[:health] }.max
+  end
+  
+  def opponents_min_health
+    opponents.map{ |player| player.stats[:health] }.min
+  end
+  
+  def those_killable
+    opponents.select{ |player| can_kill?(self, player) }
+  end
+  
+  def those_who_can_kill_me
+    opponents.select{ |player| can_kill?(player, self) }
+  end
+  
+  def those_with_low_health
+    lowest_health = opponents_min_health
+    opponents.select{ |player| player.stats[:health] == lowest_health }
+  end
+  
+  def random_low_health_opponent
+    low_health_opponents = those_with_low_health
+    low_health_opponents[rand(low_health_opponents.size)]
+  end
+end