Adding initial version of the OAuth token authentication method. This adds basic OAuth support for registering apps, getting and revoking keys, etc... The tokens come with 6 separate permissions bits; read/write user preferences, write diaries, write API and read/write GPS traces. Needs more tests.

db/migrate/036_create_oauth_tables.rb

@@ -0,0 +1,44 @@
+class CreateOauthTables < ActiveRecord::Migration
+  def self.up
+    create_table :client_applications do |t|
+      t.string :name
+      t.string :url
+      t.string :support_url
+      t.string :callback_url
+      t.string :key, :limit => 50
+      t.string :secret, :limit => 50
+      t.integer :user_id
+
+      t.timestamps
+    end
+    add_index :client_applications, :key, :unique => true
+    
+    create_table :oauth_tokens do |t|
+      t.integer :user_id
+      t.string :type, :limit => 20
+      t.integer :client_application_id
+      t.string :token, :limit => 50
+      t.string :secret, :limit => 50
+      t.timestamp :authorized_at, :invalidated_at
+      t.timestamps
+    end
+    
+    add_index :oauth_tokens, :token, :unique => true
+    
+    create_table :oauth_nonces do |t|
+      t.string :nonce
+      t.integer :timestamp
+
+      t.timestamps
+    end
+    add_index :oauth_nonces, [:nonce, :timestamp], :unique => true
+    
+  end
+
+  def self.down
+    drop_table :client_applications
+    drop_table :oauth_tokens
+    drop_table :oauth_nonces
+  end
+
+end