major refactor of auth, break up the gigantic omniauth controller into sub classes for way better extensibitily

lib/auth/github_authenticator.rb

@@ -0,0 +1,48 @@
+class Auth::GithubAuthenticator < Auth::Authenticator
+
+  def name
+    "github"
+  end
+
+  def after_authenticate(auth_token)
+    result = Auth::Result.new
+
+    data = auth_token[:info]
+
+    result.username = screen_name = data["nickname"]
+    result.email = email = data["email"]
+
+    github_user_id = auth_token["uid"]
+
+    result.extra_data = {
+      github_user_id: github_user_id,
+      github_screen_name: screen_name,
+    }
+
+    user_info = GithubUserInfo.where(github_user_id: github_user_id).first
+
+    if user_info
+      user = user_info.user
+    elsif user = User.find_by_email(email)
+      user_info = GithubUserInfo.create(
+          user_id: user.id,
+          screen_name: screen_name,
+          github_user_id: github_user_id
+      )
+    end
+
+    result.user = user
+    result.email_valid = true
+
+    result
+  end
+
+  def after_create_account(user, auth)
+    data = auth[:extra_data]
+    GithubUserInfo.create(
+      user_id: user.id,
+      screen_name: data[:github_screen_name],
+      github_user_id: data[:github_user_id]
+    )
+  end
+end