From 4b474ef8f2c7d926ce42f2bef6a72b29c3f19fc0 Mon Sep 17 00:00:00 2001
From: Kyle Passarelli <kyle.passarelli@gmail.com>
Date: Mon, 7 Oct 2013 18:20:06 -0600
Subject: [PATCH 1/2] remove '.DS_Store's

---
 .DS_Store      | Bin 6148 -> 0 bytes
 spec/.DS_Store | Bin 6148 -> 0 bytes
 2 files changed, 0 insertions(+), 0 deletions(-)
 delete mode 100644 .DS_Store
 delete mode 100644 spec/.DS_Store

diff --git a/.DS_Store b/.DS_Store
deleted file mode 100644
index 25eddca5b73bd7b962dbd04aaf860a2b32db32ad..0000000000000000000000000000000000000000
GIT binary patch
literal 0
HcmV?d00001

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diff --git a/spec/.DS_Store b/spec/.DS_Store
deleted file mode 100644
index 5008ddfcf53c02e82d7eee2e57c38e5672ef89f6..0000000000000000000000000000000000000000
GIT binary patch
literal 0
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From beb9057b979b0e67b588b1fba61d4b61ba59672c Mon Sep 17 00:00:00 2001
From: Kyle Passarelli <kyle.passarelli@gmail.com>
Date: Mon, 7 Oct 2013 19:30:20 -0600
Subject: [PATCH 2/2] add support for 'current_user'

---
 README.md                                     | 31 +++++++++++++++++++
 .../endpoint_extension.rb                     | 13 ++++++--
 2 files changed, 42 insertions(+), 2 deletions(-)

diff --git a/README.md b/README.md
index 7dfa5e2..a5b8026 100644
--- a/README.md
+++ b/README.md
@@ -99,6 +99,37 @@ namespace 'foo', :serializer => :bar do
 end
 ```
 
+### current_user
+
+One of the nice features of ActiveModel::Serializers is that it
+provides access to the authorization context via the `current_user`.
+
+In Grape, you can get the same behavior by defining a `current_user`
+helper method:
+
+```ruby
+  helpers do
+    def current_user
+      @current_user ||= User.where( :access_token => params[:token]).first
+    end
+
+    def authenticate!
+      error!('401 Unauthenticated', 401) unless current_user
+    end
+  end
+```
+
+Then, in your serializer, you could show or hide some elements
+based on the current user's permissions:
+
+```ruby
+class PostSerializer < ActiveModel::Serializer
+...
+  def include_admin_comments?
+    current_user.roles.member? :admin
+  end
+end
+```
 
 ### Full Example
 
diff --git a/lib/grape-active_model_serializers/endpoint_extension.rb b/lib/grape-active_model_serializers/endpoint_extension.rb
index dac398f..58bad83 100644
--- a/lib/grape-active_model_serializers/endpoint_extension.rb
+++ b/lib/grape-active_model_serializers/endpoint_extension.rb
@@ -16,9 +16,18 @@ module Grape
       options[:route_options]
     end
 
+    def self.included(base)
+      mattr_accessor :_serialization_scope
+      self._serialization_scope = :current_user
+
+      base.class_eval do
+        def serialization_scope
+          send(_serialization_scope) if _serialization_scope && respond_to?(_serialization_scope, true)
+        end
+      end
+    end
+
     def default_serializer_options; end
-    def serialization_scope; end
-    def _serialization_scope; end
     def url_options; end
   end