adds association wrapper objects

lib/trello.rb

@@ -26,22 +26,25 @@
 #
 # Feel free to {peruse and participate in our Trello board}[https://trello.com/board/ruby-trello/4f092b2ee23cb6fe6d1aaabd]. It's completely open to the public.
 module Trello
-  autoload :Action,       'trello/action'
-  autoload :BasicData,    'trello/basic_data'
-  autoload :Board,        'trello/board'
-  autoload :Card,         'trello/card'
-  autoload :Checklist,    'trello/checklist'
-  autoload :Client,       'trello/client'
-  autoload :HasActions,   'trello/has_actions'
-  autoload :Item,         'trello/item'
-  autoload :ItemState,    'trello/item_state'
-  autoload :List,         'trello/list'
-  autoload :Member,       'trello/member'
-  autoload :Notification, 'trello/notification'
-  autoload :Organization, 'trello/organization'
-  autoload :Request,      'trello/net'
-  autoload :TInternet,    'trello/net'
-  autoload :Token,        'trello/token'
+  autoload :Action,            'trello/action'
+  autoload :Association,       'trello/association'
+  autoload :AssociationProxy,  'trello/association_proxy'
+  autoload :BasicData,         'trello/basic_data'
+  autoload :Board,             'trello/board'
+  autoload :Card,              'trello/card'
+  autoload :Checklist,         'trello/checklist'
+  autoload :Client,            'trello/client'
+  autoload :HasActions,        'trello/has_actions'
+  autoload :Item,              'trello/item'
+  autoload :ItemState,         'trello/item_state'
+  autoload :List,              'trello/list'
+  autoload :Member,            'trello/member'
+  autoload :MultiAssociation,  'trello/multi_association'
+  autoload :Notification,      'trello/notification'
+  autoload :Organization,      'trello/organization'
+  autoload :Request,           'trello/net'
+  autoload :TInternet,         'trello/net'
+  autoload :Token,             'trello/token'
 
   module Authorization
     autoload :AuthPolicy,      'trello/authorization'

lib/trello/association.rb

@@ -0,0 +1,11 @@
+module Trello
+  class Association
+    attr_reader :owner, :target, :options, :proxy
+
+    def initialize(owner, target)
+      @owner  = owner
+      @target = target
+      @options = {}
+    end
+  end
+end

lib/trello/association_proxy.rb

@@ -0,0 +1,42 @@
+require 'active_support/core_ext'
+
+module Trello
+  class AssociationProxy
+    alias :proxy_extend :extend
+
+    instance_methods.each { |m| undef_method m unless m.to_s =~ /^(?:nil\?|send|object_id|to_a)$|^__|^respond_to|proxy_/ }
+
+    delegate :owner, :target, :to => :@association
+    delegate :count,          :to => :@association
+
+    def initialize(association)
+      @association = association
+      Array(association.options[:extend]).each { |ext| proxy_extend(ext) }
+    end
+
+    def proxy_assocation
+      @association
+    end
+
+    def method_missing(method, *args, &block)
+      if target.respond_to? method
+        target.send(method, *args, &block)
+      else
+        super
+      end
+    end
+
+    def ===(other)
+      other === target
+    end
+
+    def to_ary
+      proxy_assocation.dup
+    end
+    alias_method :to_a, :to_ary
+
+    def <<(*records)
+      proxy_assocation.concat(records) && self
+    end
+  end
+end

lib/trello/multi_association.rb

@@ -0,0 +1,10 @@
+module Trello
+  class MultiAssociation < Association
+    delegate :count, :to => :target
+
+    def initialize(owner, target = [])
+      super
+      @proxy = AssociationProxy.new(self)
+    end
+  end
+end