Disable the unlink feature for SAML connected accounts (social login).

app/controllers/profiles/accounts_controller.rb

@@ -5,7 +5,7 @@ class Profiles::AccountsController < Profiles::ApplicationController
 
   def unlink
     provider = params[:provider]
-    current_user.identities.find_by(provider: provider).destroy
+    current_user.identities.find_by(provider: provider).destroy unless provider.to_s == 'saml'
     redirect_to profile_account_path
   end
 end

app/views/profiles/accounts/show.html.haml

@@ -62,10 +62,14 @@
           .provider-btn-image
             = provider_image_tag(provider)
           - if auth_active?(provider)
+            - if provider.to_s == 'saml'
+              %a.provider-btn
+                Active
+            - else
               = link_to unlink_profile_account_path(provider: provider), method: :delete, class: 'provider-btn' do
                 Disconnect
           - else
-            = link_to user_omniauth_authorize_path(provider), method: :post, class: "provider-btn #{'not-active' if !auth_active?(provider)}", "data-no-turbolink" => "true" do
+            = link_to user_omniauth_authorize_path(provider), method: :post, class: 'provider-btn not-active', "data-no-turbolink" => "true" do
               Connect
   %hr
 - if current_user.can_change_username?

spec/controllers/profiles/accounts_controller_spec.rb

+require 'spec_helper'
+
+describe Profiles::AccountsController do
+
+  let(:user) { create(:omniauth_user, provider: 'saml') }
+
+  before do
+    sign_in(user)
+  end
+
+  it 'does not allow to unlink SAML connected account' do
+    identity = user.identities.last
+    delete :unlink, provider: 'saml'
+    updated_user = User.find(user.id)
+
+    expect(response.status).to eq(302)
+    expect(updated_user.identities.size).to eq(1)
+    expect(updated_user.identities).to include(identity)
+  end
+
+  it 'does allow to delete other linked accounts' do
+    user.identities.create(provider: 'twitter', extern_uid: 'twitter_123')
+
+    expect{
+      delete :unlink, provider: 'twitter'
+    }.to change(Identity.all, :size).by(-1)
+  end
+end
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