lots of rewrite

src/ships/Node.lua

@@ -1,11 +1,35 @@
-return function(x, y, rotation)
-    local self = {}
+local class = require "lib.middleclass"
 
+local Node = class('Node')
+
+function Node:initialize(x, y, rotation)
     self.x = x or 0
     self.y = y or 0
     self.rotation = rotation or 0
 
-    self.docked = false
-
-    return self
+    self.dockedShip = false
 end
+
+--TODO docking needs to check distance between ships and only allow
+--     docking when close enough
+function Node:dock(Ship)
+    if self.dockedShip or Ship.dockedTo then
+        error("Attempted to dock to Node with something already docked to it!")
+    else
+        self.dockedShip = Ship
+        Ship.dockedTo = self
+
+        Ship:setPosition(self.x, self.y, self.rotation)
+    end
+end
+
+function Node:undock()
+    if not self.dockedShip then
+        error("Attempted to undock a ship from a Node with no docked ship.")
+    else
+        self.dockedShip.dockedTo = false
+        self.dockedShip = false
+    end
+end
+
+return Node