aashish · August 18, 2020 15:50 · Aug 18, 2020 · Aug 18, 2020
diff --git a/mars_rover_problem_with_proxy_pattern.rb b/mars_rover_problem_with_proxy_pattern.rb
@@ -8,7 +8,6 @@ def initialize(x, y, direction = :n)
   end
 end
 
-
 class Rover
   def location
     raise NotImplementedError, "#{self.class} has not implemented method '#{__method__}'"
@@ -52,7 +51,6 @@ def start
   end
 end
 
-
 class Location
   LEFT = {
     n: :w,

diff --git a/mars_rover_problem_with_proxy_pattern.rb b/mars_rover_problem_with_proxy_pattern.rb
@@ -0,0 +1,141 @@
+class Plateau
+  attr_accessor :max_x, :max_y, :direction
+
+  def initialize(x, y, direction = :n)
+    @max_x = x.to_i
+    @max_y = y.to_i
+    @direction = direction.downcase.to_sym
+  end
+end
+
+
+class Rover
+  def location
+    raise NotImplementedError, "#{self.class} has not implemented method '#{__method__}'"
+  end
+end
+
+class RealRover < Rover
+  attr_accessor :location, :directions, :plateau
+
+  def initialize 
+  end
+end
+
+class ProxyRover < Rover
+  def initialize(real_rover)
+    @real_rover = real_rover 
+  end
+
+  def check_plateau
+    puts 'Proxy: Checking if plateau exists'
+    puts "Location: #{@real_rover.location.inspect}"
+    puts "Plateau: #{@real_rover.plateau.inspect}"  
+
+    raise 'Rover is out of region' if !@real_rover.plateau || (@real_rover.plateau && (@real_rover.plateau.max_x < @real_rover.location.x) || (@real_rover.plateau.max_y < @real_rover.location.y))
+  end
+
+  def move_possible?
+    puts 'Proxy: Checking if move is with in plateau'
+  end
+
+  def location
+    @real_rover.location
+  end
+
+  def start
+    check_plateau
+    @real_rover.directions.each do |d|
+      move_possible? if d == 'M'
+      location.send(location.mapper[d.to_sym])
+    end
+  end
+end
+
+
+class Location
+  LEFT = {
+    n: :w,
+    e: :n,
+    s: :e,
+    w: :s
+  }
+
+  RIGHT = {
+    n: :e,
+    e: :s,
+    s: :w,
+    w: :n
+  }
+
+  attr_accessor :x, :y, :direction
+
+  def initialize(x = 0, y = 0, direction = :n)
+    @x = x.to_i
+    @y = y.to_i
+    @direction = direction.downcase.to_sym
+  end
+
+
+  def turn_left
+    @direction = LEFT[@direction]
+  end
+
+  def turn_right
+    @direction = RIGHT[@direction]
+  end
+
+  def move
+    case @direction
+    when :n
+      @y += 1
+    when :e
+      @x += 1
+    when :s
+      @y -= 1
+    when :w
+      @x -= 1
+    end
+  end
+
+  def mapper
+    {
+      L: 'turn_left',
+      R: 'turn_right',
+      M: 'move'
+    }
+  end
+end
+
+
+#----- input ---------------- 
+input = gets("\n\n").chomp
+input = input.split("\n").reject(&:empty?)
+
+area = input.shift
+area = area.split
+plateau = Plateau.new(area[0], area[1])
+
+inputs = input.each_slice(2).to_a
+rovers = []
+
+inputs.each do |input|
+  position = input[0].split
+  directions = input[1].split(//).reject(&:empty?)
+
+  real_rover = RealRover.new
+  real_rover.location = Location.new(position[0], position[1], position[2])
+  real_rover.directions = directions
+  real_rover.plateau = plateau
+
+  proxy_rover = ProxyRover.new(real_rover)
+  rovers << proxy_rover
+end
+
+rovers.each do |r|
+  r.start
+  r = r.location
+  puts "#{r.x} #{r.y} #{r.direction.to_s}"
+end
+
+
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