Ok this is the actual inital code... need to convert from mongo to sqlite...

rpg_grid.rb

@@ -0,0 +1,67 @@
+class RpgGrid
+  @mc = nil
+  @gridSize = nil
+
+  # need the @mc to query occupied locations.
+  def initialize(mc, grid_size=25)
+    @mc = mc
+    @gridSize = grid_size
+  end
+
+  # Finds a place to put either a player or a monster that isn't currently occupied
+  # Players need to spawn in a non-player cell, monsters can replace an existing monster
+  def find_location()
+    loop do
+      x = rand(@gridSize)
+      y = rand(@gridSize)
+
+      loc = [x, y]
+
+      n = @mc.collection().find({'location' => [x, y]})
+      if n.count == 0 then
+        return loc
+      elsif n.first["type"] == :monster then
+        @mc.collection().delete_one({"_id" => n.first["_id"]})
+        return loc
+      end
+    end
+  end
+
+  # Move the +/- 1 on the x/y with them "bumping" off the walls to find a new position.
+  # Gotta keep em in the grid.
+  def get_move_location(cur_loc=nil)
+    if cur_loc == nil then
+      cur_loc = [0, 0]
+    end
+
+    # get the x/y differences
+    dx = get_move_diff(cur_loc[0])
+    dy = get_move_diff(cur_loc[1])
+
+    # Build a new [x,y] to save to location
+    new_loc = [cur_loc[0] + dx, cur_loc[1] + dy]
+
+    return new_loc
+  end
+
+  # Should keep all chars inside the @gridSize playfield though without getting locked on an edge
+  def get_move_diff(cur_loc)
+    # i should be a num between 0 and 2.  If 0 == 0, 1 == 1, 2 == -1.  Intuitive right?
+    i = rand(3)
+    d = 0
+
+    if i == 2 then
+      d = -1
+    else
+      d = i
+    end
+
+    if cur_loc == 0 and d == -1 then
+      d = rand(2)
+    elsif cur_loc == @gridSize - 1 and d == 1 then
+      d = rand(2) - 1
+    end
+
+    return d
+  end
+end