Use points for map

src/map.cr

@@ -33,6 +33,12 @@ class WoodTile < Tile
   end
 end
 
+class WoodMillTile < Tile
+  def letter : Char
+    'm'
+  end
+end
+
 struct Point
   def initialize(@x : Int32, @y : Int32)
   end
@@ -59,10 +65,14 @@ class Map
     @data[key(Point.new(2, 2))] = WoodTile.new(100)
   end
 
-  def get(x : Int32, y : Int32) : Tile
+  def get(point : Point) : Tile
     @data[key(Point.new(x, y))]
   end
 
+  def set(point : Point, tile : Tile)
+    @data[key(point)] = tile
+  end
+
   def print
     (0...4).each do |x|
       (0...4).each do |y|

src/village.cr

@@ -1,4 +1,5 @@
 require "./queue"
+require "./map"
 
 class Resources
   def initialize
@@ -19,14 +20,18 @@ abstract class Command
   abstract def run(ts : Int32, world : World)
 end
 
-class BuildMillCommand < Command
+class BuildWoodMillCommand < Command
+  def initialize(@point : Point)
+  end
+
   def supports?(world : World) : Bool
     return true
   end
 
   def run(ts : Int32, world : World)
-    puts "build mill"
+    printf "build mill at [%d,%d]\n", @point.x, @point.y
     c = GetWoodCommand.new
+    world.map.set(@point, WoodMillTile.new)
     world.push(ts + 5, c)
   end
 end
@@ -89,7 +94,7 @@ class World
     if !command.supports?(self)
       return false
     end
-    printf "push command %d\n", ts
+    printf "push command %s, %d\n", typeof(command), ts
     @queue.push(ts, command)
     true
   end
@@ -109,6 +114,7 @@ end
 
 w = World.new
 w.map.print
-w.push(0, BuildMillCommand.new)
+w.push(0, BuildWoodMillCommand.new(Point.new(0, 0)))
 w.push(1, BuildForesterHouseCommand.new)
 w.run(20)
+w.map.print