Added CraftingTable* components and UI

src/scripts/models/item.coffee

@@ -11,9 +11,47 @@ BaseModel = require './base_model'
 
 module.exports = class Item extends BaseModel
 
+    @DEFAULT_STACK_SIZE = 64
+
     constructor: (attributes={}, options={})->
-        attributes.name     ?= ''
-        attributes.quantity ?= 1
+        attributes.name      ?= ''
+        attributes.quantity  ?= 1
+        attributes.stackSize ?= Item.DEFAULT_STACK_SIZE
         super attributes, options
 
-    # Public Methods ###############################################################################
+        Object.defineProperty this, 'stackQuantity', get:@getStackQuantity
+
+    # Public Methods ###############################################################################
+
+    canMerge: (item)->
+        return item.name is @name
+
+    merge: (item)->
+        if not @canMerge(item) then throw new Error "cannot merge #{item} into #{this}"
+        @quantity += item.quantity
+
+    toFormatHash: ->
+        return result =
+            name: @name
+            quantity: @quantity
+            stackQuantity: @stackQuantity
+
+    # Property Methods #############################################################################
+
+    getStackQuantity: ->
+        count = 0
+        extra = @quantity
+        while extra > @stackSize
+            extra -= @stackSize
+            count += 1
+
+        return count:count extra:extra
+
+    # Object Overrides #############################################################################
+
+    toString: ->
+        result = "#{@constructor.name} (#{@cid}) { name:\"#{@name}\", quantity:#{@quantity}"
+        if @stackSize isnt Item.DEFAULT_STACK_SIZE
+            result += ", stackSize:#{@stackSize}"
+        result += ' }'
+        return result